CN109294588A - A kind of passivator for repairing heavy metal cadmium pollution in farmland and using method thereof - Google Patents
A kind of passivator for repairing heavy metal cadmium pollution in farmland and using method thereof Download PDFInfo
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- CN109294588A CN109294588A CN201811004053.5A CN201811004053A CN109294588A CN 109294588 A CN109294588 A CN 109294588A CN 201811004053 A CN201811004053 A CN 201811004053A CN 109294588 A CN109294588 A CN 109294588A
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- passivator
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- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 38
- 229910052793 cadmium Inorganic materials 0.000 title claims abstract description 27
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims description 16
- 239000002689 soil Substances 0.000 claims abstract description 66
- 239000000919 ceramic Substances 0.000 claims abstract description 14
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 13
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 13
- 229910052588 hydroxylapatite Inorganic materials 0.000 claims abstract description 13
- 239000004571 lime Substances 0.000 claims abstract description 13
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 claims abstract description 13
- 239000002086 nanomaterial Substances 0.000 claims abstract description 12
- 239000003610 charcoal Substances 0.000 claims description 10
- 239000003895 organic fertilizer Substances 0.000 claims description 9
- 239000002068 microbial inoculum Substances 0.000 claims description 5
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000440 bentonite Substances 0.000 claims description 4
- 229910000278 bentonite Inorganic materials 0.000 claims description 4
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 4
- 239000004021 humic acid Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 3
- 235000019738 Limestone Nutrition 0.000 claims description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000292 calcium oxide Substances 0.000 claims description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 2
- 239000006028 limestone Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- DMGNFLJBACZMRM-UHFFFAOYSA-N O[P] Chemical compound O[P] DMGNFLJBACZMRM-UHFFFAOYSA-N 0.000 claims 1
- 229910052573 porcelain Inorganic materials 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 13
- 150000002500 ions Chemical class 0.000 abstract description 10
- 230000035558 fertility Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 5
- 230000008439 repair process Effects 0.000 abstract description 4
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052586 apatite Inorganic materials 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 229910001424 calcium ion Inorganic materials 0.000 abstract description 2
- 238000001179 sorption measurement Methods 0.000 abstract description 2
- 238000005067 remediation Methods 0.000 abstract 1
- 241000209094 Oryza Species 0.000 description 10
- 235000007164 Oryza sativa Nutrition 0.000 description 10
- 235000009566 rice Nutrition 0.000 description 10
- 241000196324 Embryophyta Species 0.000 description 7
- 238000002161 passivation Methods 0.000 description 6
- WLZRMCYVCSSEQC-UHFFFAOYSA-N cadmium(2+) Chemical compound [Cd+2] WLZRMCYVCSSEQC-UHFFFAOYSA-N 0.000 description 4
- 235000013339 cereals Nutrition 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 235000021329 brown rice Nutrition 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 239000003337 fertilizer Substances 0.000 description 3
- 238000005342 ion exchange Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000009313 farming Methods 0.000 description 2
- 230000004720 fertilization Effects 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000008685 targeting Effects 0.000 description 2
- 240000002791 Brassica napus Species 0.000 description 1
- 235000004977 Brassica sinapistrum Nutrition 0.000 description 1
- 229910014497 Ca10(PO4)6(OH)2 Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- NRDMFTSWEBBZFK-UHFFFAOYSA-N [P].[Cd] Chemical compound [P].[Cd] NRDMFTSWEBBZFK-UHFFFAOYSA-N 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000010903 husk Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000012633 leachable Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000003516 soil conditioner Substances 0.000 description 1
- 239000004016 soil organic matter Substances 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 238000009331 sowing Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000009333 weeding Methods 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- 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
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
- C09K17/06—Calcium compounds, e.g. lime
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
-
- 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
-
- 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
- C09K2109/00—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE pH regulation
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Fertilizers (AREA)
Abstract
本发明属于土壤重金属污染修复和治理领域，具体涉及一种修复农田重金属镉污染的钝化剂，按照质量份数包括：羟基磷灰石15～25份、多孔陶瓷纳米材料20～30份、石灰15～20份、生物炭10～15份。本发明的有益效果在于，多孔陶瓷纳米材料可以迅速将土壤中的重金属离子由高活性向低活性转化；羟基磷灰石中的钙离子可以与重金属离子形成镉‑磷灰石；生物炭具有的吸附性可以改善土壤结构、增加土壤肥力；石灰可以调节土壤的酸碱度。与现有技术相比，可以快速、高效地修复农田，材料易得，修复过程不产生有害物质，不会造成二次污染，并且可以增加土壤肥力，改善农田土壤结构，大大缓解了农用地土壤污染带来的压力。The invention belongs to the field of soil heavy metal pollution remediation and treatment, and in particular relates to a passivator for remediating farmland heavy metal cadmium pollution, comprising 15-25 parts by mass of hydroxyapatite, 20-30 parts of porous ceramic nanomaterials, lime 15-20 parts, biochar 10-15 parts. The beneficial effects of the invention are that the porous ceramic nanomaterial can rapidly convert heavy metal ions in soil from high activity to low activity; calcium ions in hydroxyapatite can form cadmium-apatite with heavy metal ions; Adsorption can improve soil structure and increase soil fertility; lime can adjust soil pH. Compared with the existing technology, the farmland can be repaired quickly and efficiently, the materials are easily available, the repair process does not produce harmful substances, and does not cause secondary pollution, and it can increase soil fertility, improve farmland soil structure, and greatly alleviate farmland soil. pressure from pollution.
Description
Technical field
The invention belongs to heavy metal pollution of soil reparation and administer field, and in particular to a kind of reparation heavy metals in farmland cadmium is dirty
The passivating technique of dye.
Background technique
In recent years, with industrialization, the rapid development of urbanization, human living standard significantly improved, Industrial " three Waste " and
The random discharge of city domestic sewage rubbish, and the unreasonable use of the pesticide containing heavy metal, chemical fertilizer, so that heavy metal exists
Content in soil increases, and leads to the integrated environments problems such as soil productivity decline, pollution of agricultural products and ecological environment destruction.
Cadmium is that environment Poisoning is most strong and one of the contaminated most common heavy metal in farmland, in China by the arable land of cadmium pollution
Area is more than 1.4 ten thousand hm2, it is related to 11 and saves 25 areas, leads to up to 15,000,000 tons of contaminated grain, China is that rice is raw
Big country is produced and consumes, there are about 60% populations using rice as staple food.The exceeded problem of cadmium content becomes increasingly conspicuous in China's rice, no
Only seriously hindering the lasting and high-efficient development of agricultural production can be in plant after the heavy metal in soil is absorbed by plants
Interior enrichment enters human body by food chain, endangers the health of the mankind.
And in the prior art, administer farmland cadmium pollution usually using single passivator, such as lime, bentonite and zeolite,
Not only the period is long, treatment effeciency is low, and the heavy metal ion after passivation is unstable, after two or three season of crop planting, a huge sum of money
Belong to ion to be greatly released, stability is bad, therefore, continues a kind of improvement farmland high-efficient, durability is good
The method of cadmium pollution.
Summary of the invention
The purpose of the present invention is to provide a kind of good reparation farmlands of durability after economy, safety, treatment effeciency height, passivation
The passivating material of soil heavy metal cadmium.
To achieve the above object, a kind of the technical solution adopted by the present invention are as follows: passivation for repairing heavy metals in farmland cadmium pollution
Agent, according to mass fraction include: 15~25 parts of hydroxyapatite, 20~30 parts of porous ceramics nano material, 15~20 parts of lime,
10~15 parts of charcoal.
The beneficial effect of technical solution of the present invention is that porous ceramics nano material is bonded function to the targeting of heavy metal ion
The heavy metal ion in soil can be converted from high activity to low activity rapidly, efficiently；Calcium in hydroxyapatite from
With heavy metal ion ion exchange can also occur for son, form cadmium-apatite, and its thinner biology of crystal grain of hydroxyapatite
Activity is higher；The adsorptivity that charcoal has can improve soil texture, increase soil fertility；Lime is other than adsorptivity, also
The pH value of adjustable soil, compared with prior art, reparation heavy metals in farmland cadmium pollution passivator of the invention can be fast
Speed efficiently repairs farmland, and material is easy to get, and repair process does not generate harmful substance, not will cause secondary pollution, and can increase
Add soil fertility, improves agricultural land soil structure, alleviate farming land soil pollution bring pressure significantly.
Preferably, the passivator further include: 5~10 parts of biological humic microbial inoculum and/or biological organic fertilizer 15
~25 parts.Organic fertilizer is both belonged to, paddy growth can be not only promoted, increases yield, it can also be by adsorbing, being complexed
Effect reduces effective cadmium content of soil.After one side organic substance is manured into soil, the increased soil organism has rich in a variety of
Machine functional group can form the metallo-organic complex with certain degree of stability, to reduce heavy metal contaminants with heavy metal
Bioavailability；On the other hand, the concentration of organic fertilizer in soil is improved, plant increases the uptake of organic fertilizer
Greatly, indirectly reduce the absorption to heavy metal cadmium.
Preferably, the porous ceramics nano material, specific surface area are 180~900m2·g-1, mean pore sizes are
28nm.Its functional group can effectively prevent edaphon and reactivate the fixed heavy metal of absorption, and physical stability is strong.
Its main component of porous ceramics nano material is silica and silicate, and organic and inorganic unimolecule connects in porous ceramic surface
Branch is covalently bonded to the realization of porous ceramics hole surface by different organic functions monolayers and is modified to it, makes porous ceramics
Particle has targeting binding ability in conjunction with the higher heavy metal ion of activity and constitutes stable form, i.e. weight in promotion soil
The metallic element Forms Transformation low to activity from the higher form of activity, to reduce the biological effectiveness of heavy metal and transportable
Property, achieve the purpose that heavy metal is passivated.Especially this material does not generate leachable during rehabilitating soil, will not be to environment
Generate secondary pollution.
The lime is and prepared by the charcoal of addition mass fraction 10% into calcium oxide and 20% bentonite
At.Lime has water suction heat dissipation, and generation calcium hydroxide is reacted with water in there is alkalinity can be improved soil pH.Because charcoal is rich
Containing micropore, the content of organics of soil can be not only supplemented, moisture and nutriment can also be effectively saved, increase soil fertility,
And the promotion of content of organics can reach reduction cadmium ion to increase organo-functional group improvement soil plate kernel structure in the short time
Activity.Bentonite has the effects that improving soil texture adjusts soil acidity or alkalinity as a kind of natural soil conditioner.
Preferably, the partial size of the hydroxyapatite is 80 μm, purity 96%.Hydroxyapatite, chemical composition are
Ca10(PO4)6(OH)2, spherical crystal form, wherein Ca/P mass ratio is about 1.67.It is applied in soil, by being carried out with cadmium ion
Chemisorption, ion exchange, complex reaction and redox etc. are a series of reacts to reduce the content of soil available Cd.
The anion electrical property of soil surface can be improved in phosphorated material simultaneously, and cadmium ion is fixed on soil by electrostatic adsorption
In, reduce its transportable property.
Hydroxyapatite, lime, porous ceramics nano material and the charcoal is 100~200 mesh miberal powders；Institute
Stating biological organic fertilizer is 40~60 mesh miberal powders.Material is thinner, and its specific surface area of expression is bigger, when as passivator, contacts with soil
Area is bigger, can faster more efficiently be passivated heavy metal ion, in order to avoid miss crop planting season.
Another object of the present invention is to provide one above-mentioned reparation heavy metals in farmland cadmium pollution passivator application method,
Efficiently, heavy metals in farmland cadmium pollution problem is economically and safely repaired.
To achieve the above object, the technical solution adopted by the present invention are as follows: a kind of application method of above-mentioned passivator is specific to walk
Suddenly are as follows:
A) preparation of passivator: by hydroxyapatite, lime, biological organic fertilizer, porous ceramics nano material and biology
Charcoal mixes in proportion；
B) soil pretreatment: it will be turned over by the soil layer of cadmium pollution, and soil block smashed；
C) apply passivator: passivator made from step a) and liquid biological humic acid microbial inoculum are uniformly sprinkling upon by step
B) in pretreated soil, turning over is uniformly mixed passivator with soil, and plantation operation can be carried out after seven days.
Preferably, according to farmland property, the dosage of the passivator are as follows:
Using the passivator of reparation heavy metals in farmland cadmium pollution of the invention, a farmland huge sum of money can be fast and efficiently solved
Belong to cadmium pollution, after use, with heavy metal cadmium ion ion exchange can occur for the calcium ion in hydroxyapatite, form cadmium-phosphorus
The suction that lime stone, and its thinner bioactivity of crystal grain of hydroxyapatite is higher, charcoal and porous ceramics nano material have
Attached property can improve soil texture, increase soil fertility, and lime can also adjust the pH value of soil other than adsorptivity, raw
The addition of object humic acid microbial inoculum and biological organic fertilizer increases soil organic matter content, and containing there are many organo-functional group, energy
Complex reaction occurs with heavy metal ion, to reduce absorption of the plant to heavy metal contaminants.Passivator of the invention, raw material
From a wealth of sources, low in cost, Repair inhibition effect is good, applied widely, but not to soil does not generate secondary pollution, can be with
Improve soil texture, increase soil fertility, it is safe and efficient, volume increase, permanent reliable and stable, there is good ecological environment benefit
And economic results in society.
Specific embodiment
Technical solution of the present invention is illustrated below with reference to embodiment.
Embodiment 1: passivator preparation
Passivator is prepared according to each component accounting recorded in table 1, and the passivator of various different components is numbered.
In 1 embodiment 1 of table passivator number and each component shared by mass fraction
Embodiment 2: Rapeseed Field processing
It is south of Anhui somewhere, pH value 5.04, the total amount containing cadmium --- i.e. full Cd in every kilogram of soil for examination soil
Content is 6.87mg/kg, in every kilogram of soil in the cadmium that can be absorbed by plants under state total amount --- i.e. available state Cd contains
4.62mg/kg is measured, the fundamental property for trying soil see the table below 2.
Table 2 is for trying soil labile organic matter
Passivator D1~the D9 that will be prepared in embodiment 1, according to the passivator application method in the present invention to this for examination
Soil is handled, and usage amount is 300kg/ mu, and treated farmland is used to plant " Feng oil 737 " rape, at the same do not make it is blunt
With conventional fertilization method plantation " Feng oil 737 ", rape is as a comparison case in the soil of change processing.Separately sampled inspection after rape is mature
It surveys in soil effectively Cd content and rape stem, pod, Cd content in seed, specific data and is shown in Table 3.
Soil-rape system Cd content (mg/kg) after 3 Passivation Treatment of table
Embodiment 3: paddy field processing
Using same as Example 2 for trying soil, farmland is averagely divided into several regions, the ridge around region is used
Antiseepage sealed polyethylene plastic package.Using the passivator D1~D9 prepared in embodiment 1, according to the passivator in the present invention
Application method is respectively handled each region for examination soil, and usage amount is 300kg/ mus, and treated, and farmland is used to plant " the spring
Standing grain is excellent bright to be accounted for " rice, while being made in the soil for not making Passivation Treatment with conventional fertilization method plantation " spring standing grain excellent bright account for " rice
For comparative example.The farming methods such as top dressing, sowing, weeding, irrigation are as consistent as possible, after rice is mature, take simultaneously as far as possible
Sample detects effective Cd content in soil at this time and Culm of Rice, rice husk, the Cd content in brown rice respectively, and calculates effective
Cd removal rate and compared with conventional fertilizer application mode brown rice Cd removal rate, specific data are shown in Table 4.
The Cd content (mg/kg) of Soil-Rice System after 4 Passivation Treatment of table
Embodiment 4: passivator dosage
After being passivated processing to the farmland of different pollution levels using the method for embodiment 3, plantation spring standing grain is excellent bright to account for water
Rice, and make conventional fertilizer application test simultaneously as a comparison, reduce the influence of outside environmental elements as possible.It is taken simultaneously after rice is mature
Sample detects the content of Cd in effective Cd content and brown rice in soil at this time respectively, charges to table 5, and calculate Cd removal rate.
The dosage and effect of passivator in 5 different soils of table
Claims (8)
1. a kind of passivator for repairing heavy metals in farmland cadmium pollution, according to mass fraction includes: 15~25 parts of hydroxyapatite, more
20~30 parts of hole ceramic nano material, 15~20 parts of lime, 10~15 parts of charcoal.
2. the passivator according to claim 1 for repairing heavy metals in farmland cadmium pollution, it is characterised in that: the passivator
Further include: 5~10 parts of biological humic acid microbial inoculum and/or 15~25 parts of biological organic fertilizer.
3. the passivator according to claim 1 for repairing heavy metals in farmland cadmium pollution, it is characterised in that: the porous pottery
Porcelain nano material, specific surface area are 180~900m2·g-1, mean pore sizes 28nm.
4. the passivator according to claim 1 for repairing heavy metals in farmland cadmium pollution, it is characterised in that: the lime is logical
The charcoal of addition mass fraction 10% and 20% bentonite into calcium oxide is crossed to be prepared.
5. the passivator according to claim 1 for repairing heavy metals in farmland cadmium pollution, it is characterised in that: the hydroxyl phosphorus
The partial size of lime stone is 80 μm, purity 96%.
6. a kind of application method of such as any passivator of Claims 1 to 5, characterized by the following steps:
A) preparation of passivator: hydroxyapatite, lime, biological organic fertilizer, porous ceramics nano material and charcoal are pressed
Ratio is uniformly mixed；
B) soil pretreatment: it will be turned over by the soil layer of cadmium pollution, and soil block smashed；
C) apply passivator: passivator made from step a) and liquid biological humic acid microbial inoculum being uniformly sprinkling upon pre- by step b)
In processed soil, turning over is uniformly mixed passivator with soil, and plantation operation can be carried out after seven days.
7. the application method of passivator according to claim 6, it is characterised in that: in the step b), passivator
Usage amount be 80~400kg per acre.
8. the application method of passivator according to claim 7, it is characterised in that: according to farmland property, the passivator
Dosage are as follows:
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| CN201811004053.5A CN109294588A (en) | 2018-08-30 | 2018-08-30 | A kind of passivator for repairing heavy metal cadmium pollution in farmland and using method thereof |
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| CN201811004053.5A CN109294588A (en) | 2018-08-30 | 2018-08-30 | A kind of passivator for repairing heavy metal cadmium pollution in farmland and using method thereof |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109865740A (en) * | 2019-02-14 | 2019-06-11 | 中国科学院地球化学研究所 | A method of calcareous Paddy Soils rice enrichment inorganic mercury and methyl mercury are reduced using bentonite combination charcoal |
| CN110014029A (en) * | 2019-04-24 | 2019-07-16 | 广西博世科环保科技股份有限公司 | The method that more metal combined contamination farmland joints are repaired |
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| CN110523762A (en) * | 2019-08-20 | 2019-12-03 | 北京上水环境科技发展有限公司 | A kind of administering method of alkaline land soil heavy metal pollution |
| CN110699084A (en) * | 2019-10-09 | 2020-01-17 | 东南大学 | Soil heavy metal pollution curing and repairing composite reagent and curing and repairing method |
| CN111334301A (en) * | 2019-06-27 | 2020-06-26 | 海南大学 | Soil conditioner for repairing heavy metal polluted farmland and use method thereof |
| CN111515239A (en) * | 2020-04-16 | 2020-08-11 | 武汉市秀谷科技有限公司 | Method for repairing heavy metal polluted paddy field |
| CN112642850A (en) * | 2020-11-13 | 2021-04-13 | 湖南有色金属研究院 | Remediation method for antagonistic heavy metal contaminated soil |
| CN112934942A (en) * | 2021-01-15 | 2021-06-11 | 华北地质勘查局五一四地质大队 | Heavy metal contaminated soil remediation agent, preparation method and use method |
| CN113717733A (en) * | 2021-09-13 | 2021-11-30 | 煜环环境科技有限公司 | Repairing agent and preparation method and application thereof |
| CN113816458A (en) * | 2021-10-20 | 2021-12-21 | 中地宝联(北京)国土资源勘查技术开发集团有限公司 | Technical treatment method for preventing and treating heavy metal pollution of underground water caused by underground backfilling of mine |
| CN114133931A (en) * | 2021-10-28 | 2022-03-04 | 中冶南方都市环保工程技术股份有限公司 | Repairing agent for heavy metal polluted clay and preparation method and application thereof |
| CN114289492A (en) * | 2021-12-29 | 2022-04-08 | 上海应用技术大学 | Application method of phosphate soil conditioner in the coordinated regulation of cadmium pollution by carbon sequestration in farmland |
| CN114847034A (en) * | 2022-04-19 | 2022-08-05 | 浙江省农业科学院 | Passivator, application method and apparatus for reducing cadmium accumulation in rice |
| CN114918240A (en) * | 2022-04-19 | 2022-08-19 | 四川轻化工大学 | A biochar-based heavy metal soil remediation method |
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| CN115404084A (en) * | 2022-09-20 | 2022-11-29 | 江西中江环保集团股份有限公司 | Green fertilizing and pollution-reducing matrix for improving polluted farmland soil |
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| CN115926795A (en) * | 2022-11-17 | 2023-04-07 | 贵州省土壤肥料研究所 | Passivator for heavy metal cadmium pollution in soil and preparation method and application thereof |
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| CN109865740A (en) * | 2019-02-14 | 2019-06-11 | 中国科学院地球化学研究所 | A method of calcareous Paddy Soils rice enrichment inorganic mercury and methyl mercury are reduced using bentonite combination charcoal |
| CN110014029A (en) * | 2019-04-24 | 2019-07-16 | 广西博世科环保科技股份有限公司 | The method that more metal combined contamination farmland joints are repaired |
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| CN111334301A (en) * | 2019-06-27 | 2020-06-26 | 海南大学 | Soil conditioner for repairing heavy metal polluted farmland and use method thereof |
| CN110523762A (en) * | 2019-08-20 | 2019-12-03 | 北京上水环境科技发展有限公司 | A kind of administering method of alkaline land soil heavy metal pollution |
| CN110699084A (en) * | 2019-10-09 | 2020-01-17 | 东南大学 | Soil heavy metal pollution curing and repairing composite reagent and curing and repairing method |
| CN110699084B (en) * | 2019-10-09 | 2021-06-11 | 东南大学 | Soil heavy metal pollution curing and repairing composite reagent and curing and repairing method |
| CN111515239A (en) * | 2020-04-16 | 2020-08-11 | 武汉市秀谷科技有限公司 | Method for repairing heavy metal polluted paddy field |
| CN112642850A (en) * | 2020-11-13 | 2021-04-13 | 湖南有色金属研究院 | Remediation method for antagonistic heavy metal contaminated soil |
| CN112934942A (en) * | 2021-01-15 | 2021-06-11 | 华北地质勘查局五一四地质大队 | Heavy metal contaminated soil remediation agent, preparation method and use method |
| CN113717733A (en) * | 2021-09-13 | 2021-11-30 | 煜环环境科技有限公司 | Repairing agent and preparation method and application thereof |
| CN113816458A (en) * | 2021-10-20 | 2021-12-21 | 中地宝联(北京)国土资源勘查技术开发集团有限公司 | Technical treatment method for preventing and treating heavy metal pollution of underground water caused by underground backfilling of mine |
| CN114133931A (en) * | 2021-10-28 | 2022-03-04 | 中冶南方都市环保工程技术股份有限公司 | Repairing agent for heavy metal polluted clay and preparation method and application thereof |
| CN114289492A (en) * | 2021-12-29 | 2022-04-08 | 上海应用技术大学 | Application method of phosphate soil conditioner in the coordinated regulation of cadmium pollution by carbon sequestration in farmland |
| CN114847034A (en) * | 2022-04-19 | 2022-08-05 | 浙江省农业科学院 | Passivator, application method and apparatus for reducing cadmium accumulation in rice |
| CN114918240A (en) * | 2022-04-19 | 2022-08-19 | 四川轻化工大学 | A biochar-based heavy metal soil remediation method |
| CN114847034B (en) * | 2022-04-19 | 2023-12-01 | 浙江省农业科学院 | Passivating agent for reducing cadmium accumulation in rice, application method and application equipment |
| CN115404084A (en) * | 2022-09-20 | 2022-11-29 | 江西中江环保集团股份有限公司 | Green fertilizing and pollution-reducing matrix for improving polluted farmland soil |
| CN115322049A (en) * | 2022-09-21 | 2022-11-11 | 井冈山大学 | Mineral biological compound bacterial fertilizer and preparation method thereof |
| CN115746865A (en) * | 2022-11-02 | 2023-03-07 | 湘南学院 | Composite conditioner for repairing cadmium pollution of soil |
| CN115926795A (en) * | 2022-11-17 | 2023-04-07 | 贵州省土壤肥料研究所 | Passivator for heavy metal cadmium pollution in soil and preparation method and application thereof |
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