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WO2005066080A1 - Procede de clarification d'eau residuaires et procede de clarification - Google Patents

Procede de clarification d'eau residuaires et procede de clarification Download PDF

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Publication number
WO2005066080A1
WO2005066080A1 PCT/JP2004/007315 JP2004007315W WO2005066080A1 WO 2005066080 A1 WO2005066080 A1 WO 2005066080A1 JP 2004007315 W JP2004007315 W JP 2004007315W WO 2005066080 A1 WO2005066080 A1 WO 2005066080A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluorine
adsorption
calcium fluoride
wastewater
hydrotalcites
Prior art date
Application number
PCT/JP2004/007315
Other languages
English (en)
Japanese (ja)
Inventor
Hodaka Ikeda
Kenichi Ito
Naoko Akita
Koji Kanagawa
Tsutomu Sato
Original Assignee
Sophia Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sophia Co., Ltd. filed Critical Sophia Co., Ltd.
Publication of WO2005066080A1 publication Critical patent/WO2005066080A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/12—Halogens or halogen-containing compounds
    • C02F2101/14—Fluorine or fluorine-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/16—Regeneration of sorbents, filters

Definitions

  • the present invention relates to a wastewater purification method and a purification method for removing fluorine from fluorine-containing wastewater discharged from, for example, a semiconductor factory or a power plant.
  • a method of reacting calcium hydroxide and calcium chloride with fluorine to produce calcium fluoride and coagulating and precipitating is used. Is being done.
  • a pH adjuster is added to an acidic wastewater containing fluorine to adjust the pH, and the pH-adjusted wastewater is sent to a reaction tank, where calcium hydroxide or calcium chloride is added. To produce calcium fluoride.
  • reaction solution containing calcium fluoride is sent to a coagulation tank, a coagulant is added to coagulate calcium fluoride, and sludge containing calcium fluoride coagulated in the settling tank is settled and removed. Things.
  • Patent Document 1 is a known document relating to a technology for removing fluorine from fluorine-containing wastewater.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 7-214702 describes a treatment method for removing fluorine in wastewater using calcium chloride, and a method for adding a chloride solution to a wastewater before adding the solution to the wastewater.
  • the total or partial pH of the calcium chloride solution is adjusted to 11.5 or more in advance, and the solution is allowed to react with wastewater.This reduces the amount of calcium chloride used or uses a large amount of flocculant. that you can avoid is disclosed. Disclosure of the invention At this time, when calcium fluoride is generated by the above-mentioned reaction of calcium chloride etc.
  • the present invention has been proposed in view of the above problems, and does not require a large amount of a calcium compound such as calcium chloride or calcium hydroxide or a coagulant, and does not discharge a large amount of sludge.
  • Another object of the present invention is to provide a wastewater purification method capable of removing fluorine from a fluorine-containing wastewater to a high level, thereby obtaining treated water having a very low fluorine concentration.
  • Another object of the present invention is to provide a wastewater purification method and a purification method capable of regenerating and efficiently using hydrotalcites and performing advanced fluorine purification at a low cost.
  • the method for purifying wastewater of the present invention comprises the steps of adjusting the pH as necessary to the fluorine-containing wastewater, adding a calcium compound to generate calcium fluoride, and solidifying the reaction solution after the generation of the fluorinated water.
  • a step of liquid separation to remove calcium fluoride a step of adjusting the pH of the treated water after the removal of calcium fluoride, and a step of adding hydrotalcites to adsorb remaining fluorine on the hydrotalcites.
  • solid-liquid separation in the case of removing calcium fluoride or talcites at the mouth after adsorption of fluorine by solid-liquid separation is performed by, for example, adding a flocculant to coagulate and precipitate the solid phase. or to recover the solid phase in flotation by Bapuri ring of air, or Ri appropriately der like to recover the solid phase membrane filtration using a filter Chief, also forces Rushiumu compound Karushiumu chloride Wakashi Ku hydroxide It is suitable to the Karushiumu
  • any material capable of producing calcium fluoride by reacting with fluorine may be used.
  • calcium carbonate may be used.
  • the pH of the treated water or the like in the case where fluorine is adsorbed to the hydrotalcites is preferably pH 4 to 10 and more preferably pH 5 to 7.
  • the method for purifying waste water of the present invention includes a step of performing a fluorine desorption treatment on the removed hydrosites after the adsorption of fluorine, and a step of dehydrating the hydrotalcites after the fluorine desorption treatment with fluorine.
  • the method further comprises the step of combining the fluorine-containing water generated by the fluorine desorption treatment with the fluorine-containing wastewater before the generation of the calcium fluoride.
  • the fluorine-adsorbed hydrotalcites may be stirred in a solution having a pH of 9 and ⁇ ⁇ 11 to obtain a fluorine solution. It is characterized in that it is subjected to a desorption treatment, and preferably, the pH of the solution to be subjected to the fluorine desorption treatment is set to approximately 10.
  • the method for purifying wastewater of the present invention comprises the steps of adjusting the pH as necessary to the fluorine-containing wastewater, adding a calcium compound to generate calcium fluoride, and after the formation of the calcium fluoride, A step of adding hydrosites to the reaction solution to adsorb remaining fluorine on the hydrosites, and a step of solid-liquid separation of the adsorbed reaction solution to adsorb calcium fluoride and adsorbed fluorine. And a step of removing the hydrosites.
  • the high Dorotarusai Bok compound is characterized that it is a Hydro barrel site.
  • the fluorine or high Dorotarusai preparative acids to adsorb full Tsu containing Ion of the present invention have the general formula: [MS + i— xM 3 " 1 " x (OH) 2] [ ⁇ ⁇ - ⁇ / ⁇ ⁇ ⁇ ⁇ 20 ] (M 2 + is divalent metal, M 3 + is trivalent metal, An is n-valent It is possible to use any of the hydrotalcites represented by (anion), for example, hydrotalcite: Mg 6 A12 (OH)!
  • purification methods of the present invention in the purification method of adsorbing fluorine by adding Hyde port Tarusai preparative acids to be purified which contains fluorine, Hyde port Tarusai preparative such after fluorine adsorption of 9 rather ⁇ Eta ⁇ stirred at 1 1 in solution subjected to fluorine desorption process, characterized that you adsorbing off Tsu containing added again Hydro Tarusai preparative such after the fluorine desorption process for the purification target
  • the pH of the solution to be subjected to the fluorine desorption treatment is approximately 10. It should be noted that the object of purification containing fluorine can be soil or the like in addition to wastewater.
  • the wastewater purification method of the present invention does not use a large amount of calcium compounds such as calcium chloride or calcium hydroxide, a large amount of coagulant, does not discharge a large amount of sludge, and eliminates a fluorine-containing wastewater.
  • Very high levels of fluorine can be removed.
  • a large amount of calcium chloride or the like or a flocculant need not be used, and a large amount of sludge is not discharged, chemical and sludge treatment costs are reduced, and a high level of fluorine removal is achieved. Is possible at low cost and efficiently.
  • the wastewater purification method or purification method of the present invention desorbs fluorine from the hydrosites after the adsorption of fluorine, and causes the hydrosites after the desorption treatment to adsorb fluorine again.
  • the dehydration treatment is performed by stirring the hydrotalcites after the adsorption of fluorine in a solution having a pH of 9 and more preferably in a solution having a pH of about 10. Therefore, extremely high regeneration efficiency can be realized.
  • FIG. 1 is an explanatory diagram showing a flow of waste water purification process of the first embodiment
  • FIG. 2 is an explanatory diagram showing a flow of waste water purification process of the second embodiment shaped condition
  • Fig 3 is fluorine ions from the stirring time and the high Dorotarusai DOO Graph showing the relationship with the amount of desorption
  • Figure 4 shows pH 9
  • 10 and 11 4 is a graph showing the amount of fluorine adsorbed by re-adsorption of each hydrotalcite from which fluorine was desorbed in FIG. BEST MODE FOR CARRYING OUT THE INVENTION
  • a wastewater purification treatment of the first embodiment for circulating and reusing a hydrotalcite to remove and purify fluorine from a fluorine-containing wastewater will be described.
  • wastewater containing fluorine is introduced into the primary reaction coagulation / sedimentation tank 1, and a PH adjuster is added to the primary reaction coagulation / sedimentation tank 1.
  • the fluorine-containing wastewater is adjusted to a predetermined pH, for example, a pH of about 8 to 10.
  • a pH adjusting agent to be added an appropriate one of an acid and an alkali can be used.
  • sodium hydroxide (Na) OH) is added as a pH adjuster.
  • the settled sludge is led out of the primary reaction coagulation sedimentation tank 1 to the dewatering machine 4, where the sludge is dewatered by the dewatering machine 4 and discharged as a dewatered cake.
  • the primary treated water obtained by removing the sludge in the first reaction coagulating sedimentation tank 1 is introduced into the second reaction flocculation tank 2, the secondary reaction flocculation tank 2 by the addition of p H adjusting agent , to adjust the primary treated water a predetermined PH, for example, before and after p H 6 adsorption performance of Hyde port Tarusai Bok is Mizunoto ⁇ the best to be described later.
  • the p H adjusting agent wherein the addition are possible and Mochiiruko those suitable Yichun, for example in the primary treated water, hydrochloric acid (HC 1), etc. Is added as pH adjuster.
  • secondary reaction flocculation precipitation tank 2 by adding a coagulant such as sulfuric pan de and PAC, fluorine ions Hyde port Tarusai preparative adsorbed: M g 6 A l 2 ( OH) 1 6 (F one 1 ) 2 ⁇ 4 H 2 O, and Hydro Tarusai preparative fluoride ions could not be adsorbed: M g 6 a l 2 ( OH) 1 6 C 0 3 - to 4 by agglomerating of H 2 O precipitation.
  • a coagulant such as sulfuric pan de and PAC
  • Hyde port Tarusai preparative adsorbed the fluorine ion: M g 6 A l 2 ( OH) 1 6 (F - 1) 2 • 4 H high Dorotarusai bets or the precipitate was suspended in a solution containing 2 0, was added p H adjusting agent such as hydroxide Na Application Benefits um (N a OH) to the solution, given the p H of the solution
  • p H adjusting agent such as hydroxide Na Application Benefits um (N a OH) to the solution, given the p H of the solution
  • the pH is adjusted to, for example, pH 911, preferably around 10, and carbon dioxide (co 2 ) is added to facilitate the desorption of fluorine.
  • the separated solid phase is sent from fluorine DatsuHanareso 3 is introduced into the secondary reaction flocculation tank 2, it is circulated using a new high Dorotarusai into double-order flocculation tank 2 as required : introducing M g 6 a l 2 (OH ) 1 6 C 0 3 '4 H 2 0. Moreover, the separation and the liquid phase or a solution containing fluorine ions (F-) was sends back to the primary reaction flocculation precipitation buttocks tank 1, both the process and new fluorine-containing waste water to be introduced in the first reaction coagulating sedimentation tank 1 to.
  • the primary reaction coagulation / sedimentation tank 1 and the secondary reaction coagulation / sedimentation tank 2, the fluorine desorption tank 3, and the dehydrator 4 are used to remove fluorine from the fluorine-containing wastewater. Since the hydrosite separated in the desorption tank 3 is reused, it is only necessary to add the hydrosite for the loss if necessary, and the hydrosite can be used effectively. Further, it is possible to reduce the consumption of the hydro-site and reduce the cost. Furthermore, by adsorbing the fluoride ions remaining after the formation of calcium fluoride on the hydrotalcite, it is possible to efficiently treat the treated water with a very low fluorine concentration and to use calcium chloride or the like. The need to use a large amount of coagulant is eliminated. Furthermore, it is possible to circulate the fluorine and finally recover the fluorine adsorbed on the hydrosite as calcium fluoride.
  • pH adjustment treatment, fluorine ion adsorption treatment using a hydrotalcite, coagulation treatment, and precipitation treatment are performed.
  • the configuration is, for example, a pH adjustment tank, a reaction tank that performs fluorine ion adsorption treatment, a condensing tank, a sedimentation tank, or a combination of these appropriate treatments in the same tank. it is possible to.
  • Wastewater purification process of the second embodiment Remind as in FIG. 2, the wastewater containing fluorine is introduced into the reaction flocculation tank 5, addition of P H modifiers alkaline or acid to the reaction flocculation tank 5 Then, the fluorine-containing wastewater is adjusted to a predetermined pH, for example, about pH 6.
  • the hydrotalcite Mg 6 Al 2 (OH)! It was added 6 C 0 3 '4 H 2 0, is adsorbed fluorine ions (F-) remaining in the waste water after the formation of calcium fluoride (C a F 2) to Hyde port Tarusai bets.
  • the added high Dorotarusai Bok Most of M g 6 A 1 2 (OH ) i 6 CO 3 ⁇ 4 H 2 O is adsorbed crowded Captures the fluorine ion (F-) between the eyebrows, a fluorine ion adsorbed Hyde port Tarusai DOO: M g 6 A l 2 ( OH) 1 6 (F - 1) 2 ⁇ 4 ⁇ 2 0 is generated.
  • reaction flocculation tank 5 by adding a coagulant such as sulfuric pan de and PAC, full Tsu of calcium (C a F 2), and fluorine adsorbed high Dorotarusai DOO: M g 6 A 1 2 ( OH ) 1 6 (F - 1) 2 ⁇ 4 ⁇ 2 0, and Hyde port Tarusai preparative fluorine could not be adsorbed: M g 6 a l 2 ( OH) 1 6 (F - 1) 2 ⁇ 4 ⁇ 2 0 Coagulate and sediment sludge containing these.
  • a coagulant such as sulfuric pan de and PAC
  • the precipitated sludge is derived in the dehydrator 6 from the reaction coagulating sedimentation tank 5, and dehydrated sludge dehydrator 6, together with discharged as a dehydrated cake, the treated water obtained by removing the sludge is discharged out of the system that.
  • the wastewater purification treatment of the second embodiment is performed by one reaction coagulation sedimentation tank 5 and one A fluorine-containing waste water carafe Tsu iodine was removed by machine 6, with a small capital-investment Ri by the low-cost, fluorine can and child removal and space-saving. Further, Ri by the and this to adsorb fluorine ion-remaining after generation of fluoride Karushiu beam at Hydro Tarusai Bok, with efficient fluorine concentration can very low treated water and child, calcium chloride It is not necessary to use a large amount of a coagulant or the like.
  • a pH adjustment treatment a treatment for generating calcium fluoride by reaction with calcium chloride, and a fluoride ion treatment using hydrotalcite It is configured to perform the adsorption treatment, the aggregation treatment, and the sedimentation treatment, but it is possible to use a modification example of the first embodiment and the like in the second embodiment as appropriate.
  • a reaction tank that performs fluorine ion adsorption treatment, a coagulation tank, a precipitation tank, or a combination of these appropriate treatments in the same tank, or calcium fluoride It is possible to add a tank for performing coagulation or sedimentation after the production process of water.
  • FIG. 3 is a graph showing the relationship between the amount of desorbed fluorine and the stirring time obtained by measuring the fluorine content of the filtrate R2 by the filtration.
  • the graph in Fig. 3 shows that the higher the pH and the longer the stirring time, the greater the desorption amount of fluorine for each of the beakers of pH 9, 10 and 11
  • pH II stirred for 60 minutes
  • solid phase K lg Fluorine: 1 3 2.
  • O mg was desorbed.
  • the F desorption amounts at 60,000 minutes of stirring at pH 9, 10, and 11 are shown in Tables 2 and 2 below, and after desorption at 60 minutes of stirring time. This solid phase is referred to as solid phase K 2.
  • FIG. 1 shows that the fluorine content per 1 L of about 0.1 mo1 / L of the calcium fluoride solution before adding the solid phase K 2: , 10 and 11, the fluorine content of filtrate R 3 after re-adsorption of fluorine by solid phase K 2 (filtrate: F), the amount of fluorine absorbed by solid phase K 3 (solid phase: F), and solid phase K 3 shows the amount of fluorine adsorbed per lg, and FIG.
  • Solid K 3 is Hyde port Tarusai bets with adsorbed fluorine: M g 6 A l 2 ( OH) i 6 (F - 1) 2 - 4 H 2 0, or fluorine adsorbed high
  • Dorotarusai DOO M g 6 Al 2 (OH) 16 (F- 1 ) 2 ⁇ 4 ⁇ 20 and normal high ⁇ ⁇
  • Dotal site Mg 6 Al 2 (OH)! Consisting of 6 CO a ⁇ 4 H 2 0 .
  • Table 2 shows the amount of fluorine adsorbed after the re-adsorption of fluorine at pH 9, 10 and 11 based on the above-mentioned simulation tests of adsorption, desorption and re-adsorption of fluorine.
  • the amount of fluorine adsorbed after resorption in Table 2 is the value obtained by subtracting the amount of fluorine desorption from the fluorine desorption test in (2) from the amount of fluorine adsorption in the adsorption test (2) and adding the amount of fluorine adsorption from the resorption test in (3). is there.
  • the amount of fluorine adsorbed at the time of re-adsorption is lower than that at the time of desorption, while at pH 9 and 10, the amount of adsorption at the time of fluorine re-adsorption is lower.
  • the amount was larger than the amount desorbed at the time of desorption. This is probably because there was room for fluorine adsorption between the layers of the hydro- talcite after the adsorption test (1).
  • Table 3 shows the amount of fluorine desorbed when the desorption rate after desorption is assumed to be the same as the desorption rate in the desorption test in Table 2 and (2).
  • the amount of fluorine adsorbed and the amount of desorbed fluorine show that in the case of pH 9, the amount of adsorption during re-adsorption is large, but the amount of desorption is small, so Regeneration efficiency decreases when hydrotalcite is repeatedly used to remove fluorine by adsorption.
  • the amount of desorption is large, but the amount of adsorption when re-adsorbing is small.
  • the regeneration efficiency of the hydro-site is reduced.
  • fluorine is removed from, for example, fluorine-containing wastewater discharged from a semiconductor plant, a power plant, or the like, and the fluorine-containing wastewater is efficiently reduced to a low fluorine concentration.
  • Effluent for example, effluent below the emission standard determined in view of environmental protection.

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Sorption (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

L'invention concerne un procédé de clarification d'eaux résiduaires comprenant: une étape dans laquelle un composé de calcium est ajouté aux eaux résiduaires contenant du fluor afin de générer du fluorure de calcium; une étape dans laquelle le liquide résultant de la réaction de production de fluorure de calcium est soumis à une séparation solide-liquide par, par exemple, floculation, afin d'éliminer le fluorure de calcium; une étape dans laquelle le pH de l'eau traitée, après élimination du fluorure de calcium, est régulé et une hydrotalcite est ajoutée à celle-ci pour adsorber le fluor résiduel dans l'hydrotalcite; une étape dans laquelle l'eau traitée après l'adsorption est soumise à une séparation solide-liquide par, par exemple, floculation, afin d'éliminer l'hydrotalcite sur laquelle a été adsorbé le fluor; une étape dans laquelle l'hydrotalcite à fluor adsorbé est soumise à un traitement de désorption du fluor; une étape dans laquelle l'hydrotalcite ayant subi le traitement de désorption de fluor est ajoutée à nouveau à l'étape d'adsorption de fluor; et une étape dans laquelle l'eau contenant du fluor produite dans le traitement de désorption du fluor est ajoutée à l'eau résiduaire contenant du fluor à soumettre à la production de fluorure de calcium. Le procédé permet l'élimination efficace du fluor contenu dans les eaux résiduaires contenant du fluor. Ainsi est obtenue une eau traitée présentant une concentration en fluor excessivement faible.
PCT/JP2004/007315 2004-01-08 2004-05-21 Procede de clarification d'eau residuaires et procede de clarification WO2005066080A1 (fr)

Applications Claiming Priority (2)

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JP2004-2597 2004-01-08
JP2004002597A JP2005193167A (ja) 2004-01-08 2004-01-08 排水浄化方法及び浄化方法

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CN103303996A (zh) * 2013-04-02 2013-09-18 中国科学院生态环境研究中心 具有不同表面特征的活性铝氧化物除氟吸附材料的应用
CN103708679A (zh) * 2013-12-26 2014-04-09 浙江工商大学 一种氟化工废水的处理工艺
CN104193028A (zh) * 2014-06-16 2014-12-10 江苏永冠给排水设备有限公司 一种复合饮用水除氟方法
CN104591435A (zh) * 2015-01-04 2015-05-06 刘树芹 一种工业废水的处理方法
CN107252675A (zh) * 2017-08-11 2017-10-17 江苏海普功能材料有限公司 一种负载型除氟剂及其制备方法
CN114592125A (zh) * 2022-02-28 2022-06-07 中南大学 一种含氟酸性体系矿化除氟的方法
CN118579956A (zh) * 2024-06-27 2024-09-03 广东芳源新材料集团股份有限公司 一种同时深度去除废水中f、p、cod的方法

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JP4338705B2 (ja) * 2006-01-31 2009-10-07 日本エコロジー株式会社 ホウフッ化物イオンを含む廃液の処理方法
JP2007209886A (ja) * 2006-02-09 2007-08-23 Bokuto Kasei Kogyo Kk フッ素除去剤、それを用いたフッ素含有排水の処理方法及びその処理装置
JP4845188B2 (ja) * 2006-03-14 2011-12-28 協和化学工業株式会社 排水処理剤および排水中のフッ素イオンを低減させる方法
PL2055675T3 (pl) 2006-07-31 2016-03-31 Japan Dev & Construction Materiał w postaci cząstek stałych podobny do hydrotalkitu i sposób jego wytwarzania
WO2008059618A1 (fr) * 2006-11-17 2008-05-22 Jdc Corporation Appareil de traitement d'un liquide, et procédé de traitement d'un liquide, à l'aide d'une substance granulaire de type hydrotalcite
JP5320323B2 (ja) * 2009-10-26 2013-10-23 株式会社東芝 廃液の処理方法及び処理装置
JP5794422B2 (ja) * 2011-09-30 2015-10-14 三菱マテリアル株式会社 フッ素および有害物質を除去する処理方法と処理装置
JP7249602B1 (ja) * 2021-11-22 2023-03-31 栗田工業株式会社 炭酸型層状複水酸化物の再生方法、酸性排ガス処理方法、及び酸性排ガス処理設備

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Cited By (7)

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Publication number Priority date Publication date Assignee Title
CN103303996A (zh) * 2013-04-02 2013-09-18 中国科学院生态环境研究中心 具有不同表面特征的活性铝氧化物除氟吸附材料的应用
CN103708679A (zh) * 2013-12-26 2014-04-09 浙江工商大学 一种氟化工废水的处理工艺
CN104193028A (zh) * 2014-06-16 2014-12-10 江苏永冠给排水设备有限公司 一种复合饮用水除氟方法
CN104591435A (zh) * 2015-01-04 2015-05-06 刘树芹 一种工业废水的处理方法
CN107252675A (zh) * 2017-08-11 2017-10-17 江苏海普功能材料有限公司 一种负载型除氟剂及其制备方法
CN114592125A (zh) * 2022-02-28 2022-06-07 中南大学 一种含氟酸性体系矿化除氟的方法
CN118579956A (zh) * 2024-06-27 2024-09-03 广东芳源新材料集团股份有限公司 一种同时深度去除废水中f、p、cod的方法

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