CN109678626A - The soil conditioner and the preparation method and application thereof repaired for mercury pollution farmland - Google Patents
The soil conditioner and the preparation method and application thereof repaired for mercury pollution farmland Download PDFInfo
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- CN109678626A CN109678626A CN201910080369.0A CN201910080369A CN109678626A CN 109678626 A CN109678626 A CN 109678626A CN 201910080369 A CN201910080369 A CN 201910080369A CN 109678626 A CN109678626 A CN 109678626A
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- Prior art keywords
- magnesium
- rice hull
- hull carbon
- soil
- modified
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- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 229910052753 mercury Inorganic materials 0.000 title claims abstract description 65
- 239000003516 soil conditioner Substances 0.000 title claims abstract description 54
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 241000209094 Oryza Species 0.000 claims abstract description 117
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract description 117
- 235000009566 rice Nutrition 0.000 claims abstract description 117
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 111
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 111
- 239000002689 soil Substances 0.000 claims abstract description 60
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 41
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 41
- 239000011777 magnesium Substances 0.000 claims abstract description 41
- CKMXBZGNNVIXHC-UHFFFAOYSA-L ammonium magnesium phosphate hexahydrate Chemical compound [NH4+].O.O.O.O.O.O.[Mg+2].[O-]P([O-])([O-])=O CKMXBZGNNVIXHC-UHFFFAOYSA-L 0.000 claims abstract description 40
- 239000002253 acid Substances 0.000 claims abstract description 23
- KMQAPZBMEMMKSS-UHFFFAOYSA-K calcium;magnesium;phosphate Chemical compound [Mg+2].[Ca+2].[O-]P([O-])([O-])=O KMQAPZBMEMMKSS-UHFFFAOYSA-K 0.000 claims abstract description 23
- 239000003864 humus Substances 0.000 claims abstract description 21
- 238000002156 mixing Methods 0.000 claims description 19
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 9
- 239000010865 sewage Substances 0.000 claims description 9
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- 230000002550 fecal effect Effects 0.000 claims description 7
- 230000001376 precipitating effect Effects 0.000 claims description 7
- 239000010903 husk Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 238000000967 suction filtration Methods 0.000 claims description 4
- 210000003608 fece Anatomy 0.000 claims 1
- 239000004575 stone Substances 0.000 claims 1
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 10
- 230000008439 repair process Effects 0.000 abstract description 6
- 238000011172 small scale experimental method Methods 0.000 description 12
- 239000003610 charcoal Substances 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 238000011084 recovery Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000001988 toxicity Effects 0.000 description 4
- 231100000419 toxicity Toxicity 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000036541 health Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000005067 remediation Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000001603 reducing effect Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 206010029350 Neurotoxicity Diseases 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 206010044221 Toxic encephalopathy Diseases 0.000 description 1
- LWNCNSOPVUCKJL-UHFFFAOYSA-N [Mg].[P] Chemical compound [Mg].[P] LWNCNSOPVUCKJL-UHFFFAOYSA-N 0.000 description 1
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006388 chemical passivation reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000001684 chronic effect Effects 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- 230000035558 fertility Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 210000004185 liver Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007135 neurotoxicity Effects 0.000 description 1
- 231100000228 neurotoxicity Toxicity 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B7/00—Fertilisers based essentially on alkali or ammonium orthophosphates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2101/00—Agricultural use
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Soil Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pest Control & Pesticides (AREA)
- Environmental Sciences (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention " soil conditioner and the preparation method and application thereof repaired for mercury pollution farmland ", belongs to heavy metal polluted soil of farmland and repairs field.The soil conditioner, comprising: magnesium-modified rice hull carbon base guanite, calcium magnesium phosphate, humus acid；The magnesium-modified rice hull carbon base guanite be rice hull carbon with mixed containing the magnesium-modified rice hull carbon that magnesium solution reacts with Heisui River after obtained product.The soil conditioner is suitable for mercury pollution agricultural land soil, and said preparation preparation method is simple, good to the heavy metal repairing effect in soil, stable, long-acting, affected by environment small.
Description
Technical field
The invention belongs to heavy metal polluted soil of farmland repair field, and in particular to it is a kind of for mercury pollution farmland repair
Soil conditioner and the preparation method and application thereof.
Background technique
Mercury is commonly called as mercury, and freezing point is -38.83 DEG C, and boiling point is 356.73 DEG C, is a kind of silvery white liquid at normal temperature
Metal, volatility are extremely strong.There are 7 kinds of stable isotopes in nature for mercury, in the environment with mercury element, inorganic mercury and organic mercury
Form exists.Mercury is often applied to chemicals, medical instrument, electronics or electric equipment products in life, in recent years, with people
Increase to Hg toxicity understanding, mercury are gradually eliminated in these fields, but still play emphatically in scientific research and dentist are learned
Want purposes.But for biology, mercury is a kind of biological toxicity chemical substance, can generate chronic lesion to human health, mainly
Show neurotoxicity, liver and Toxicity of Kidney etc..Studies have shown that Soil Mercury Pollution not only produces agricultural product quality and safety
Raw harm, also generates threat to human health and ecological environment security.The mankind have been up to several generation to the understanding of the toxicity of mercury
It records, has occurred the fifties in last century because the environmental exposure of mercury brings the event of significant impact, i.e. Japanese water to human health
Yu disease event.Into after 21 century, gradually attention with the whole world to environment for human survival, mercury pollution problem causes global each
The extensive concern on boundary.
Currently, countries in the world mainly include physics, chemistry, biology, agricultural to farmland soil heavy metals pollution remediation technology
Ecology and combined remediation technology etc., wherein in-situ chemical passivation recovery technique has many advantages, such as easy, quick, efficient, is reparation
The preferable selection of large area heavy metal pollution agricultural land soil.Not yet there is one kind and combines that formula is simple, mercury in this field at present
Pollute the soil conditioner that degradation efficiency is high, soil remediation effect is good.
Summary of the invention
Based on objective problem existing for this field and demand, the purpose of the present invention is to provide a kind of heavy metal pollution farmlands
Rehabilitating soil conditioner and preparation method thereof is suitable for mercury pollution agricultural land soil.Said preparation preparation method is simple, in soil
Heavy metal repairing effect is good, stable, long-acting, affected by environment small.
Technical scheme is as follows:
The soil conditioner repaired for mercury pollution farmland, comprising: magnesium-modified rice hull carbon base guanite, calcium magnesium phosphate, corruption
Grow matter acid；
The magnesium-modified rice hull carbon base guanite be the magnesium-modified rice hull carbon reacted with containing magnesium solution of rice hull carbon with it is black
The product obtained after water mixing.
The soil conditioner, the raw material including following parts by weight: magnesium-modified 4~7 parts of rice hull carbon base guanite, calcium and magnesium phosphorus
2~3 parts, 1~2 part of humus acid of fertilizer.
The soil conditioner, the raw material including following parts by weight: magnesium-modified 5 parts of rice hull carbon base guanite, calcium magnesium phosphate 3
Part, 2 parts of humus acid.
The rice hull carbon is reacted with containing magnesium solution refers to that rice hull carbon after mixing, filters and precipitating is taken to be dried to containing magnesium solution
Constant weight obtains magnesium-modified rice hull carbon；
Preferably, the rice hull carbon is mixed with containing magnesium solution by solid-to-liquid ratio 1:10；
It is highly preferred that the uniformly mixed finger rice hull carbon with containing vibrating 12h under 150r/min again after magnesium solution；
Preferably, the mass volume ratio that the magnesium-modified rice hull carbon is mixed with Heisui River is 10g: 1L；
It is highly preferred that the magnesium-modified rice hull carbon vibrates 4h under 150r/min after mixing with Heisui River.
The magnesium solution that contains is magnesium chloride solution；The Heisui River is the Heisui River of pH >=9；The Heisui River refers to fecal sewage.
Preparation method for the soil conditioner that mercury pollution farmland is repaired, comprising: react rice hull carbon with containing magnesium solution
Magnesium-modified rice hull carbon base guanite is made in obtained magnesium-modified rice hull carbon after mixing with Heisui River；By the magnesium-modified rice hull carbon base bird
Coprolite and calcium magnesium phosphate, humus acid are mixed to prepare the soil conditioner.
The rice hull carbon is fired 2h for rice husk at 500 DEG C and is made；
Preferably, levigate 10 mesh of mistake of the rice hull carbon；
The rice hull carbon is reacted with containing magnesium solution refers to that rice hull carbon after mixing, filters and precipitating is taken to be dried to containing magnesium solution
Constant weight obtains magnesium-modified rice hull carbon；
Preferably, the rice hull carbon is mixed with containing magnesium solution by solid-to-liquid ratio 1:10；
It is highly preferred that the uniformly mixed finger rice hull carbon with containing vibrating 12h under 150r/min again after magnesium solution；
Preferably, the mass volume ratio that the magnesium-modified rice hull carbon is mixed with Heisui River is 10g: 1L；
It is highly preferred that the magnesium-modified rice hull carbon vibrates 4h under 150r/min after mixing with Heisui River；
It is highly preferred that the magnesium solution that contains is magnesium chloride solution；The Heisui River is the Heisui River of pH >=9.
The magnesium-modified rice hull carbon base guanite is mixed by following weight proportions respectively with calcium magnesium phosphate, humus acid: magnesium
Modified 4~7 parts of rice hull carbon base guanite, 2~3 parts of calcium magnesium phosphate, 1~2 part of humus acid；
Preferably, magnesium-modified 5 parts of rice hull carbon base guanite, 3 parts of calcium magnesium phosphate, 2 parts of humus acid；
It is highly preferred that the Heisui River refers to fecal sewage.
A kind of mercury pollution farmland restorative procedure, which is characterized in that apply the soil conditioner toward mercury pollution farmland,
And/or the soil conditioner that the preparation method is prepared.
Apply the soil conditioner by 0.5%~2% of dry ground quality in mercury pollution farmland；
Preferably, it is mixed well after applying the soil conditioner into mercury pollution agricultural land soil；
It is highly preferred that making the water content of soil conservation 60% after mixing well.
A kind of preparation method of mercury pollution agricultural land soil conditioner is made of following raw material according to mass fraction meter: rice husk
Charcoal, MgCl2Solid, calcium magnesium phosphate, humus acid, NaOH, H2SO4The Heisui River and.
The magnesium-modified rice hull carbon base guanite agricultural land soil conditioner preparation method, comprising the following steps:
(1) rice hull carbon: the paddy after harvest is prepared, is shelled after air-drying, the rice husk of acquisition is packed into the sweet pot of porcelain, is wrapped up with tinfoil
Afterwards, it is placed in Muffle furnace, 2h is fired at 500 DEG C, obtain rice hull carbon, levigate 10 mesh of mistake is spare.
(2) it prepares magnesium-modified rice hull carbon: with magnesium solution (10mol/L MgCl2), according to solid-to-liquid ratio 1:10 by rice hull carbon
It is put into solution, 12h is vibrated under 150r/min, precipitating is taken after suction filtration, and drying to constant weight.
(3) magnesium-modified rice hull carbon base guanite is prepared: with NaOH and H2SO4It adjusts Heisui River pH value and is at least 9.0, by 10g rice
Shell charcoal is put into the Heisui River 1.0L, vibrates 4h under 150r/min, generates magnesium-modified rice hull carbon base guanite.
(4) it prepares magnesium-modified rice hull carbon base guanite soil conditioner: choosing magnesium-modified 4~7 parts of rice hull carbon base guanite,
It 2~3 parts of calcium magnesium phosphate, 1~2 part of humus acid, is uniformly mixed, that is, obtains magnesium-modified rice hull carbon base guanite soil conditioner.
Guanite (MgNH4PO4·6H2It O) is the product that recovery of nitrogen and phosphorus is carried out from sewage or industrial wastewater, present invention benefit
With the potentiality for the stabilizing heavy metal that guanite has, the battalion such as nitrogen, phosphorus, magnesium can be provided for plant by being manured into soil as slow-release fertilizer
Support element.Charcoal large specific surface area and basic functionality rich in have stronger suction-operated and stabilization to heavy metal
Change effect.By charcoal and guanite by certain chemical means in conjunction with, the recycling of nitrogen P elements in sewage not only can be improved
Efficiency, or the research and development of heavy-metal contaminated soil in-situ chemical recovery technique soil conditioner provide green, efficient original
Material.
Compared with prior art, present invention has an advantage that
(1) rice hull carbon in soil conditioner raw material is from a wealth of sources, environmental-friendly, will not generate secondary pollution to environment.
This method can be used for recycling the nutrients such as the nitrogen phosphorus in Heisui River, and Heisui River is carried out resource utilization.
(2) when this method prepares magnesium-modified rice hull carbon base guanite using Heisui River, magnesium-modified rice hull carbon can be in Heisui River
The generation of guanite provides carrier, makes it easier to separate and recover from Heisui River.
(3) rice hull carbon itself has the ability of heavy metal in stable soil, will when it adsorbs excessive ammonia nitrogen in Heisui River
Make that there is bigger cation exchange capacity, the stabilisation ability of heavy metal will be improved.
(4) present invention obtain magnesium-modified rice hull carbon base guanite be manured into soil can be improved the storage capacity of carbon base in soil carbon,
It increases soil fertility, improve soil texture, can also be the growth of plant while reducing soil available content of beary metal
Nutrient is provided.
Specific embodiment
The present invention is described in further detail combined with specific embodiments below, and following embodiments are merely exemplary,
It is not intended to limit the scope of the present invention.Experimental method used in following embodiments is conventional method unless otherwise specified；
Material, reagent used etc., are commercially available unless otherwise specified.
1st group of embodiment, soil conditioner of the invention
This group of embodiment provides a kind of soil conditioner repaired for mercury pollution farmland, comprising: magnesium-modified rice hull carbon base
Guanite, calcium magnesium phosphate, humus acid；
The magnesium-modified rice hull carbon base guanite be the magnesium-modified rice hull carbon reacted with containing magnesium solution of rice hull carbon with it is black
The product obtained after water mixing.
" Heisui River " herein refers to that fecal sewage, fecal sewage refer to the washing water drained in resident's daily life, packet
Include two class sewage: 1. sanitary sewages containing fecal materials；2. the sanitary wastewater including flushing water and excrement.
In the particular embodiment, the soil conditioner includes the raw material of following parts by weight: magnesium-modified rice hull carbon base bird
4~7 parts of coprolite, 1~4 part of calcium magnesium phosphate, 2~5 parts of humus acid.
In other embodiments, the soil conditioner is also selected from any group of formula in the following table 1:
Table 1
Mercury pollution farmland repairing effect in upper table be in actual mercury pollution farmland by dry ground quality 0.25%~
2% (mass ratio) and the dry ground in the 3rd group of embodiment, wet soil reduction formula apply soil conditioner of the invention and handle 10 days
Resulting available mercury pollutes reduced rate data.Actual mercury pollution agricultural land soil is the mining area week that following experimental example 1-3 choose
Side agricultural land soil, specific method of administration are to be sprinkled into soil conditioner of the invention into agricultural land soil by the dosage calculated.
The upper lower limit value of available mercury pollution reduced rate respectively corresponds the upper lower limit value of soil conditioner amount of application in upper table,
In other words, in soil conditioner dosage 0.25%~2% within the scope of this, the higher available mercury pollution drop of soil conditioner dosage
Low rate is higher.But beyond outside this range, there is no be in soil conditioner dosage for available mercury pollution reduction amplitude
Linear growth trend, that is to say, that after soil conditioner dosage is more than 2%, soil conditioner dosage up increases again, economic
Investment and reducing effect cost performance be not just high.
In a preferred embodiment, the soil conditioner includes the raw material of following parts by weight: magnesium-modified rice hull carbon base bird
5 parts of coprolite, 3 parts of calcium magnesium phosphate, 2 parts of humus acid.
In some embodiments, the rice hull carbon is reacted with containing magnesium solution refers to rice hull carbon and contains magnesium solution after mixing,
Suction filtration takes precipitating, and drying to constant weight obtains magnesium-modified rice hull carbon；
Preferably, the rice hull carbon is mixed with containing magnesium solution by solid-to-liquid ratio 1:10；The ratio is the common ratio of modification biological charcoal
Example, and rice hull carbon is as one of charcoal, being mixed using this ratio with magnesium solution can get preferable modified effect.
It is highly preferred that the uniformly mixed finger rice hull carbon with containing vibrating 12h under 150r/min again after magnesium solution；
Preferably, the mass volume ratio that the magnesium-modified rice hull carbon is mixed with Heisui River is 10g: 1L, under the ratio, is conducive to
The rate of recovery of guanite in Heisui River can be improved in the generation of guanite.
It is highly preferred that the magnesium-modified rice hull carbon vibrates 4h under 150r/min after mixing with Heisui River.
In a more specific embodiment, the magnesium solution that contains is magnesium chloride solution；The Heisui River be pH >=9, Heisui River.It should
Under pH value condition, be conducive to the generation of guanite, the rate of recovery of guanite in Heisui River can be improved.
2nd group of embodiment, the preparation method of soil conditioner of the present invention
This group of embodiment provides a kind of preparation method of soil conditioner repaired for mercury pollution farmland, comprising: by rice
Shell charcoal with mixed containing the magnesium-modified rice hull carbon that magnesium solution reacts with Heisui River after magnesium-modified rice hull carbon base guanite is made；By institute
It states magnesium-modified rice hull carbon base guanite and calcium magnesium phosphate, humus acid is mixed to prepare the soil conditioner.
In the particular embodiment, the rice hull carbon is fired 2h for rice husk at 500 DEG C and is made；
Preferably, levigate 10 mesh of mistake of the rice hull carbon；
In other embodiments, the rice hull carbon that the present invention uses is also possible to common, the other method preparation in this field
Carbonization rice husk or rice hull carbon, the preparation of rice hull carbon are not limited to method of the present invention.
In a further embodiment, the rice hull carbon reacts with containing magnesium solution and refers to that rice hull carbon is uniformly mixed with containing magnesium solution
Afterwards, it filters and takes precipitating drying to constant weight obtains magnesium-modified rice hull carbon；
Preferably, the rice hull carbon is mixed with containing magnesium solution by solid-to-liquid ratio 1:10；
It is highly preferred that the uniformly mixed finger rice hull carbon with containing vibrating 12h under 150r/min again after magnesium solution；
Preferably, the mass volume ratio that the magnesium-modified rice hull carbon is mixed with Heisui River is 10g: 1L；
It is highly preferred that the magnesium-modified rice hull carbon vibrates 4h under 150r/min after mixing with Heisui River；
It is highly preferred that the magnesium solution that contains is magnesium chloride solution；The Heisui River is the Heisui River of pH >=9.
In some embodiments, the magnesium-modified rice hull carbon base guanite is pressed following respectively with calcium magnesium phosphate, humus acid
Weight proportion mixing: magnesium-modified 4~7 parts of rice hull carbon base guanite, 2~3 parts of calcium magnesium phosphate, 1~2 part of humus acid；
Preferably, magnesium-modified 5 parts of rice hull carbon base guanite, 3 parts of calcium magnesium phosphate, 2 parts of humus acid.
3rd group of embodiment, mercury pollution farmland restorative procedure of the invention
This group of embodiment provides a kind of mercury pollution farmland restorative procedure, which is characterized in that applies the 1st group toward mercury pollution farmland
Any soil conditioner of embodiment, and/or, the soil that any preparation method of the 2nd group of embodiment is prepared
Conditioner.
In some embodiments, apply the soil by 0.5%~2% (mass ratio) of dry ground quality in mercury pollution farmland
Conditioner；This application ratio, which can be used for small-scale experiment, can also be used for practical farmland reparation, and dry ground is from farmland, first from farmland
In fetch soil, be laid in after room-dry and grind sieving and obtain dry ground.In practical applications, wet soil or water paddy soil
Conditioner of the invention can be directly applied, is converted according to moisture content (soil moisture content percentage) difference in soil,
Reduction formula is as follows:
Dry ground quality (m)=wet soil quality (M) × (1- soil moisture content percentage n)
Preferably, it is mixed well after applying the soil conditioner into mercury pollution agricultural land soil；
It is highly preferred that making the water content of soil conservation 60% after mixing well.Keep 60% water content reason as follows: one
It is that conditioner can be made to be uniformly mixed with soil under the moisture condition, second is that soil conditioner will not be made to float or be lost.
Experimental example 1
Now with certain mining area periphery mercury pollution agricultural land soil be repair object (full mercury content for 1.69mg/kg, wherein available state
Mercury content is 0.33mg/kg), small-scale experiment effect explanation is carried out, specific as follows:
Soil sample 50.0g is weighed respectively in 125ml plastic cup, is added conditioner (the 0.5%~2% of dry ground quality), is filled
Divide and be uniformly mixed, keep 60% water content of dry ground quality, not apply conditioner C K as control, respectively processing is repeated 3 times.Open loop
In incubated at room temperature 10d, the available state of soil sample analysis measurement Mercury in Soil under border.
Small-scale experiment result is as follows:
1 small-scale experiment of table is respectively for examination Mercury in Soil bio-available Zn concentration and pH value
Experimental example 2
Now with certain mining area periphery mercury pollution agricultural land soil be repair object (full mercury content for 5.42mg/kg, wherein available state
Mercury content is 0.95mg/kg), small-scale experiment effect explanation is carried out, specific as follows:
Soil sample 50.0g is weighed respectively in 125ml plastic cup, is added conditioner (the 0.5%~2% of dry ground quality), is filled
Divide and be uniformly mixed, keep 60% water content of dry ground quality, not apply conditioner C K as control, respectively processing is repeated 3 times.Open loop
In incubated at room temperature 10d, the available state of soil sample analysis measurement Mercury in Soil under border.
Small-scale experiment result is as follows:
2 small-scale experiment of table is respectively for examination Mercury in Soil bio-available Zn concentration and pH value
Experimental example 3
Now with certain mining area periphery mercury pollution agricultural land soil be repair object (full mercury content for 9.27mg/kg, wherein available state
Cadmium content is 1.66mg/kg), small-scale experiment effect explanation is carried out, specific as follows:
Soil sample 50.0g is weighed respectively in 125ml plastic cup, is added conditioner (the 0.5%~2% of dry ground quality), is filled
Divide and be uniformly mixed, keep 60% water content of dry ground quality, not apply conditioner C K as control, respectively processing is repeated 3 times.Open loop
In incubated at room temperature 10d, the available state of soil sample analysis measurement Mercury in Soil under border.
Small-scale experiment result is as follows:
3 small-scale experiment of table is respectively for examination Mercury in Soil bio-available Zn concentration and pH value
Further explanation to any one of experimental example 1-3 of the present invention experiment content recorded: more specific experimentation are as follows:
First have to acquisition soil, detect its mercury full dose and bio-available Zn concentration, judge its whether can as research object (judgment criteria is
" soil environment quality farming land soil pollution risk management and control standard (tentative) ", choosing the exceeded soil of mercury full dose is research pair
As).For satisfactory pedotheque, the small-scale experiment can be carried out, needs that blank is arranged in small-scale experiment
Control is to compare the effect that other are handled.
Experimental example is all single factor experiment, and all processing are in same time, same environment, same temperature and humidity, only
The difference of conditioner additive amount unlike one.
Secondly, respectively addition conditioner handles the reduction amplitude of available mercury, and it can only be compared with blank control, it cannot be with experiment
Original soil is compared.
Third, either blank control still add the processing of conditioner, and the reduced rate of available mercury cannot be with reality
The data comparison of available mercury in original soil is tested, because original soil is different from each processing local environment is tested, moisture content is different, detection
Analysis is nor synchronous carry out, without comparability.
Compared with original soil, bio-available Zn concentration has slight decline for blank control, and reason is: the dry ground addition of blank control
The moisture (that is, water content 60%) of its quality 60% has cultivated a period of time, and moisture results in oxidation-reduction potential in soil
Variation, it is variant so as to cause bio-available Zn concentration.
Claims (10)
1. the soil conditioner repaired for mercury pollution farmland, comprising: magnesium-modified rice hull carbon base guanite, calcium magnesium phosphate, humic
Matter acid；
The magnesium-modified rice hull carbon base guanite is that the magnesium-modified rice hull carbon that rice hull carbon is reacted with containing magnesium solution and Heisui River are mixed
The product obtained after conjunction.
2. soil conditioner according to claim 1, the raw material including following parts by weight: magnesium-modified rice hull carbon base guanite
4~7 parts, 2~3 parts of calcium magnesium phosphate, 1~2 part of humus acid.
3. soil conditioner according to claim 1 or 2, the raw material including following parts by weight: magnesium-modified rice hull carbon base bird
5 parts of coprolite, 3 parts of calcium magnesium phosphate, 2 parts of humus acid.
4. soil conditioner according to claim 1, the rice hull carbon react with containing magnesium solution refers to rice hull carbon and to contain magnesium molten
After mixing, suction filtration takes precipitating, and drying to constant weight obtains magnesium-modified rice hull carbon for liquid；
Preferably, the rice hull carbon is mixed with containing magnesium solution by solid-to-liquid ratio 1:10；
It is highly preferred that the uniformly mixed finger rice hull carbon with containing vibrating 12h under 150r/min again after magnesium solution；
Preferably, the mass volume ratio that the magnesium-modified rice hull carbon is mixed with Heisui River is 10g: 1L；
It is highly preferred that the magnesium-modified rice hull carbon vibrates 4h under 150r/min after mixing with Heisui River.
5. soil conditioner according to claim 4, the magnesium solution that contains is magnesium chloride solution；The Heisui River is pH >=9
Heisui River；The Heisui River refers to fecal sewage.
6. the preparation method for the soil conditioner that mercury pollution farmland is repaired, comprising: react rice hull carbon with containing magnesium solution
To magnesium-modified rice hull carbon mixed with Heisui River after magnesium-modified rice hull carbon base guanite is made；By the magnesium-modified rice hull carbon base birds droppings
Stone and calcium magnesium phosphate, humus acid are mixed to prepare the soil conditioner.
7. preparation method according to claim 7, the rice hull carbon is fired 2h for rice husk at 500 DEG C and is made；
Preferably, levigate 10 mesh of mistake of the rice hull carbon；
The rice hull carbon is reacted with containing magnesium solution to be referred to rice hull carbon and contains magnesium solution after mixing, and suction filtration takes precipitating, and drying to constant weight
Obtain magnesium-modified rice hull carbon；
Preferably, the rice hull carbon is mixed with containing magnesium solution by solid-to-liquid ratio 1:10；
It is highly preferred that the uniformly mixed finger rice hull carbon with containing vibrating 12h under 150r/min again after magnesium solution；
Preferably, the mass volume ratio that the magnesium-modified rice hull carbon is mixed with Heisui River is 10g: 1L；
It is highly preferred that the magnesium-modified rice hull carbon vibrates 4h under 150r/min after mixing with Heisui River；
It is highly preferred that the magnesium solution that contains is magnesium chloride solution；The Heisui River is the Heisui River of pH >=9.
8. preparation method according to claim 6 or 7, the magnesium-modified rice hull carbon base guanite and calcium magnesium phosphate, humic
Matter acid presses following weight proportion mixing respectively: magnesium-modified 4~7 parts of rice hull carbon base guanite, 2~3 parts of calcium magnesium phosphate, humus is sour
1~2 part；
Preferably, magnesium-modified 5 parts of rice hull carbon base guanite, 3 parts of calcium magnesium phosphate, 2 parts of humus acid；
It is highly preferred that the Heisui River refers to fecal sewage.
9. a kind of mercury pollution farmland restorative procedure, which is characterized in that described in past mercury pollution farmland application claim 1-5 is any
Soil conditioner, and/or, the soil conditioner that preparation method as claimed in claim 6 to 8 is prepared.
10. mercury pollution farmland according to claim 9 restorative procedure, by dry ground quality in mercury pollution farmland 0.5%~
2% applies the soil conditioner；
Preferably, it is mixed well after applying the soil conditioner into mercury pollution agricultural land soil；
It is highly preferred that making the water content of soil conservation 60% after mixing well.
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| CN201910080369.0A CN109678626B (en) | 2019-01-28 | 2019-01-28 | Soil conditioner for mercury-polluted farmland remediation and preparation method and application thereof |
| PCT/CN2019/090524 WO2020155510A1 (en) | 2019-01-28 | 2019-06-10 | Soil conditioner used for restoring mercury-contaminated agricultural land, and preparation method and application thereof |
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| CN201910080369.0A CN109678626B (en) | 2019-01-28 | 2019-01-28 | Soil conditioner for mercury-polluted farmland remediation and preparation method and application thereof |
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| CN113322078A (en) * | 2021-06-03 | 2021-08-31 | 江西源春环保科技有限公司 | Granules for comprehensively treating heavy metals in soil and preparation method thereof |
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