JPH0130555B2 - - Google Patents
Info
- Publication number
- JPH0130555B2 JPH0130555B2 JP18997284A JP18997284A JPH0130555B2 JP H0130555 B2 JPH0130555 B2 JP H0130555B2 JP 18997284 A JP18997284 A JP 18997284A JP 18997284 A JP18997284 A JP 18997284A JP H0130555 B2 JPH0130555 B2 JP H0130555B2
- Authority
- JP
- Japan
- Prior art keywords
- ferrous
- wastewater
- organic matter
- added
- compounds
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
- 238000000034 method Methods 0.000 claims description 19
- 239000002351 wastewater Substances 0.000 claims description 18
- 239000005416 organic matter Substances 0.000 claims description 16
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 14
- 229910052785 arsenic Inorganic materials 0.000 claims description 12
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims description 12
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 238000006386 neutralization reaction Methods 0.000 claims description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 6
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 5
- 239000000920 calcium hydroxide Substances 0.000 claims description 5
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical class [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- 235000012255 calcium oxide Nutrition 0.000 claims description 3
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 3
- 239000011790 ferrous sulphate Substances 0.000 claims description 3
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- IMBKASBLAKCLEM-UHFFFAOYSA-L ferrous ammonium sulfate (anhydrous) Chemical compound [NH4+].[NH4+].[Fe+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O IMBKASBLAKCLEM-UHFFFAOYSA-L 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000002244 precipitate Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 5
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 3
- 229960004887 ferric hydroxide Drugs 0.000 description 3
- IEECXTSVVFWGSE-UHFFFAOYSA-M iron(3+);oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Fe+3] IEECXTSVVFWGSE-UHFFFAOYSA-M 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229940043430 calcium compound Drugs 0.000 description 2
- 150000001674 calcium compounds Chemical class 0.000 description 2
- 238000000975 co-precipitation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 239000012028 Fenton's reagent Substances 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- VLAXZGHHBIJLAD-UHFFFAOYSA-N arsphenamine Chemical compound [Cl-].[Cl-].C1=C(O)C([NH3+])=CC([As]=[As]C=2C=C([NH3+])C(O)=CC=2)=C1 VLAXZGHHBIJLAD-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229960002089 ferrous chloride Drugs 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- MGZTXXNFBIUONY-UHFFFAOYSA-N hydrogen peroxide;iron(2+);sulfuric acid Chemical compound [Fe+2].OO.OS(O)(=O)=O MGZTXXNFBIUONY-UHFFFAOYSA-N 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、ヒ素及び有機物を含む廃水からヒ素
及び有機物を同時に除去する方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for simultaneously removing arsenic and organic matter from wastewater containing arsenic and organic matter.
従来の技術
半導体製造工場、ガラス製造工場等から排出さ
れる廃水中には、人体に有害なヒ素が含まれ、そ
の除去が必要となる。ヒ素の除去方法としては、
吸着法、膜分離法、沈澱法等があるが、沈澱法が
除去性能において優れている。沈澱法はCa、
Mg、Fe又はAlの化合物を添加して、難溶性の
As化合物を生成させ、これを分離除去する方法
である。特に、Fe化合物を添加する場合には、
難溶性As化合物（FeAsO4）を生成し、これが沈
澱物として除去される他に、中和時に生成する水
酸化第二鉄の固形物にAsが吸着し、共沈捕集効
果により除去されるので、Asの除去効果が最も
優れ、一般的に用いられている。BACKGROUND ART Wastewater discharged from semiconductor manufacturing factories, glass manufacturing factories, etc. contains arsenic, which is harmful to the human body, and it is necessary to remove it. As a method of removing arsenic,
There are adsorption methods, membrane separation methods, precipitation methods, etc., but the precipitation method is superior in removal performance. The precipitation method uses Ca,
By adding Mg, Fe or Al compounds, it becomes difficult to dissolve.
This method generates As compounds and separates and removes them. In particular, when adding Fe compounds,
In addition to producing a poorly soluble As compound (FeAsO 4 ), which is removed as a precipitate, As is adsorbed to the solid ferric hydroxide produced during neutralization and removed by the co-precipitation trapping effect. Therefore, it has the best As removal effect and is commonly used.
発明が解決しようとする問題点
As含有廃水のAsの形態としては、As（）化
合物として、As2O3、H3AsO3等があり、As（）
化合物としては、As2O5、H3AsO4等の無機化合
物があり、更にサルバルサン等の有機As化合物
が存在していると考えられる。これらの中で、
As（）化合物及び有機As化合物はAs（）化合
物に比べて沈澱法によつて除去され難い。一方、
有機物としては、As化合物の他に、一般有機物
が混入している場合が多く、廃水処理の面から
Asと同時に有機物を除去する必要がある場合が
多い。Problems to be Solved by the Invention The forms of As in As-containing wastewater include As() compounds such as As 2 O 3 and H 3 AsO 3 ;
The compounds include inorganic compounds such as As 2 O 5 and H 3 AsO 4 , and it is thought that organic As compounds such as salvarsan are also present. Among these,
As() compounds and organic As compounds are more difficult to remove by precipitation methods than As() compounds. on the other hand,
In addition to As compounds, general organic matter is often mixed in as organic matter, and from the perspective of wastewater treatment,
It is often necessary to remove organic matter at the same time as As.
即ち、Fe化合物による沈澱法には、次のよう
な問題点があつた。 That is, the precipitation method using Fe compounds has the following problems.
(1) 廃水中のAsが、３価のヒ素であるか又は有
機物と結合している場合、Asの除去効果が低
下する。(1) When As in wastewater is trivalent arsenic or is combined with organic matter, the removal effect of As is reduced.
(2) 廃水中に有機物を含み、その除去が必要な場
合には、更に有機物の除去操作が必要となる。(2) If wastewater contains organic matter and needs to be removed, additional organic matter removal operations are required.
特開昭49−20952号公報には、ヒ素を含有する
廃水を酸化剤、マグネシウム塩及び石灰と接触せ
しめ、PHを9.5以上、好ましくは10.5以上にする
ことによつて該廃水中のヒ素を水酸化マグネシウ
ム及び水酸化カルシウムと共沈させることを開示
している。この方法では、酸化剤により廃水中の
As（）は（）に酸化されて除去されるが、有
機物の除去が考慮されていない。また、この方法
では固液分離後の廃水は強アルカリ性であるの
で、放流前に中和しなければならない。 JP-A No. 49-20952 discloses that arsenic in wastewater is removed by contacting arsenic-containing wastewater with an oxidizing agent, magnesium salt, and lime, and adjusting the pH to 9.5 or higher, preferably 10.5 or higher. Co-precipitation with magnesium oxide and calcium hydroxide is disclosed. In this method, oxidizing agents are used to
As () is removed by being oxidized to (), but the removal of organic matter is not taken into consideration. Furthermore, in this method, the wastewater after solid-liquid separation is strongly alkaline, so it must be neutralized before being discharged.
従つて、本発明は、３価のヒ素、有機物と結合
しているヒ素及び有機物を同時に効率よく除去し
うる方法を提供することを目的とする。 Therefore, an object of the present invention is to provide a method that can simultaneously and efficiently remove trivalent arsenic, arsenic bonded to organic substances, and organic substances.
問題点を解決するための手段
本発明方法は、ヒ素及び有機物を含む廃水に第
一鉄塩及び過酸化水素を添加し、同時にアルカリ
剤又は酸により廃水のPHを３〜４に調整する酸化
工程、アルカリ剤を添加してPHを６〜８に調整す
る中和工程及び固形物を固液分離する固液分離工
程からなることを特徴とする。Means for Solving the Problems The method of the present invention involves an oxidation step in which ferrous salt and hydrogen peroxide are added to wastewater containing arsenic and organic matter, and at the same time the pH of the wastewater is adjusted to 3 to 4 with an alkaline agent or acid. The method is characterized by comprising a neutralization step in which an alkaline agent is added to adjust the pH to 6 to 8, and a solid-liquid separation step in which solid matter is separated into solid-liquid.
本発明方法においては、第一鉄塩としては、硫
酸第一鉄又は硫酸第一鉄アンモニウムを用いる。
塩化第一鉄は、塩素イオンが酸化を妨害する恐れ
があるので好ましくない。第一鉄塩と過酸化水素
はフエントン試薬と呼ばれ、酸化力が強く、その
反応機構の解明は十分ではないが、両者の反応に
より酸化力の強い水酸基ラジカル（・OH）が生
成されるためと考えられている。 In the method of the present invention, ferrous sulfate or ferrous ammonium sulfate is used as the ferrous salt.
Ferrous chloride is not preferred because the chloride ions may interfere with oxidation. Ferrous salt and hydrogen peroxide are called Fuenton's reagents, which have strong oxidizing power, and although the reaction mechanism is not fully understood, the reaction between the two produces hydroxyl radicals (・OH), which have strong oxidizing power. It is believed that.
フエントン試薬はPH３〜４で最も酸化力が強い
ので、廃水のPHを３〜４に調整する。このPHに調
整する薬剤としては、アルカリ剤としては生石灰
又は消石灰、酸としては塩素を含まない硫酸が好
ましい。 Fenton's reagent has the strongest oxidizing power at pH 3 to 4, so adjust the pH of the wastewater to 3 to 4. As agents for adjusting the pH, quicklime or slaked lime is preferable as an alkaline agent, and chlorine-free sulfuric acid is preferable as an acid.
この酸化工程においては、下記の反応が行われ
る：
As（）→As（） ……(1)
有機As化合物→無機As化合物 ……(2)
一般有機物→CO2＋H2O ……(3)
第一鉄塩の添加量は、Asに対して重量比で５
倍以上、又は過酸化水素中の酸素に対する重量比
で６倍以上であるのが好ましい。 In this oxidation step, the following reaction takes place: As()→As()...(1) Organic As compound→Inorganic As compound...(2) General organic matter→CO 2 + H 2 O...(3) The amount of ferrous salt added is 5% by weight relative to As.
The weight ratio to oxygen in hydrogen peroxide is preferably 6 times or more.
酸化工程において、PH調整のためアルカリ剤と
して添加するカルシウム化合物は、次の中和工程
においてAsの除去を促進する。 In the oxidation step, the calcium compound added as an alkaline agent to adjust the pH promotes the removal of As in the next neutralization step.
前記のように酸化処理を行つた後、中和処理を
行うが、中和剤として添加するアルカリは、生石
灰又は消石灰のカルシウム化合物であるのが好ま
しい。 After performing the oxidation treatment as described above, a neutralization treatment is performed, and the alkali added as a neutralizing agent is preferably a calcium compound of quicklime or slaked lime.
中和工程においては、次の反応が行われる：
Fe2+＋（Ｏ）→Fe3+ ……(4)
Fe3+＋AsO3- 4→FeAsO4↓ ……(5)
Fe3+＋3OH-→Fe（OH）3↓ ………(6)
即ち、第一鉄が第二鉄に酸化され、その第二鉄
はAs（）と反応してAs化合物の沈澱を生成し、
更に第二鉄は水酸化第二鉄の沈澱を生成し、この
沈澱物にAs（）が吸着されると考えられる。 In the neutralization step, the following reaction takes place: Fe 2+ + (O) → Fe 3+ ……(4) Fe 3+ +AsO 3- 4 →FeAsO 4 ↓ ……(5) Fe 3+ +3OH - →Fe(OH) 3 ↓ ………(6) That is, ferrous iron is oxidized to ferric iron, and the ferric iron reacts with As() to produce a precipitate of As compound,
Furthermore, ferric iron produces a precipitate of ferric hydroxide, and it is thought that As() is adsorbed to this precipitate.
こうして(5)及び(6)式により生じたAsを含む沈
澱物を固液分離することにより、最終的にAsが
廃水から除去される。 By solid-liquid separation of the As-containing precipitate produced by formulas (5) and (6), As is finally removed from the wastewater.
固液分離を一層容易にするため、凝集剤を添加
してもよい。 A flocculant may be added to further facilitate solid-liquid separation.
作 用
第一鉄塩及び過酸化水素は、As（）をAs
（）に、有機As化合物を無機As化合物に、有
機物を炭酸ガスと水に酸化、中和後に難容性As
化合物及び水酸化第二鉄の沈澱物を生じることに
より、廃水中のAs及び有機物を同時に除去する
ことを可能にする。Effects Ferrous salts and hydrogen peroxide can convert As() to As
In (), organic As compounds are oxidized to inorganic As compounds, organic substances are oxidized to carbon dioxide gas and water, and after neutralization, refractory As
By forming a precipitate of compounds and ferric hydroxide, it is possible to simultaneously remove As and organic matter in wastewater.
実施例
次に、実施例に基づいて本発明を詳述するが、
本発明はこれに限定されるものではない。Examples Next, the present invention will be explained in detail based on examples.
The present invention is not limited to this.
実施例 １
Asの全濃度が70mg／であり、有機物として
CODMoの濃度が100mg／であるAs含有廃水に過
酸化水素をCODMo濃度に対する反応当量比1.2の
量で添加し、硫酸第一鉄を3000mg／添加した
後、廃水のPHを３に調節した。反応終了後、消石
灰を添加してPH７に中和し、放置して沈澱させ
た。得られた処理水のAs濃度は0.002mg／以
下、CODMo濃度は10mg／以下であつた。Example 1 The total concentration of As is 70mg/, and as an organic matter
Hydrogen peroxide was added to As-containing wastewater with a COD Mo concentration of 100 mg/in an amount with a reaction equivalent ratio of 1.2 to the COD Mo concentration, and ferrous sulfate was added at 3000 mg/in, and the pH of the wastewater was adjusted to 3. . After the reaction was completed, slaked lime was added to neutralize the pH to 7, and the mixture was left to precipitate. The As concentration of the obtained treated water was 0.002 mg/or less, and the COD Mo concentration was 10 mg/or less.
発明の効果
本発明方法によれば、As及び有機物を同時に
効率よく除去することができ、極めて良好な処理
水質を達成することができる。Effects of the Invention According to the method of the present invention, As and organic matter can be efficiently removed at the same time, and extremely good treated water quality can be achieved.
Claims (1)
酸化水素を添加し、同時にアルカリ剤又は酸によ
り廃水のPHを３〜４に調整する酸化工程、アルカ
リ剤を添加してPHを６〜８に調整する中和工程及
び固形物を固液分離する固液分離工程からなるこ
とを特徴とするヒ素及び有機物を含む廃水の処理
方法。 ２ 第一鉄塩として硫酸第一鉄又は硫酸第一鉄ア
ンモニウムを使用し、アルカリ剤として生石灰又
は消石灰を使用し、酸として硫酸を使用する特許
請求の範囲第１項記載の方法。 ３ 第一鉄塩をAsに対する重量比で５倍以上、
又は過酸化水素中の酸素に対する重量比で６倍以
上添加する特許請求の範囲第１項又は第２項記載
の方法。[Claims] 1. An oxidation step in which ferrous salts and hydrogen peroxide are added to wastewater containing arsenic and organic matter, and at the same time the pH of the wastewater is adjusted to 3 to 4 with an alkaline agent or acid; A method for treating wastewater containing arsenic and organic matter, comprising a neutralization step of adjusting the pH to 6 to 8 and a solid-liquid separation step of separating solid matter. 2. The method according to claim 1, wherein ferrous sulfate or ferrous ammonium sulfate is used as the ferrous salt, quicklime or slaked lime is used as the alkali agent, and sulfuric acid is used as the acid. 3 The weight ratio of ferrous salt to As is 5 times or more,
Alternatively, the method according to claim 1 or 2, wherein hydrogen peroxide is added at a weight ratio of 6 times or more to oxygen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18997284A JPS6168191A (en) | 1984-09-11 | 1984-09-11 | Method for treating wastewater containing arsenic and organic matter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18997284A JPS6168191A (en) | 1984-09-11 | 1984-09-11 | Method for treating wastewater containing arsenic and organic matter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6168191A JPS6168191A (en) | 1986-04-08 |
| JPH0130555B2 true JPH0130555B2 (en) | 1989-06-20 |
Family
ID=16250260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18997284A Granted JPS6168191A (en) | 1984-09-11 | 1984-09-11 | Method for treating wastewater containing arsenic and organic matter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6168191A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4673482B2 (en) * | 2000-12-28 | 2011-04-20 | 三井金属鉱業株式会社 | Se and As-containing wastewater treatment methods |
| JP4598415B2 (en) * | 2004-02-27 | 2010-12-15 | オルガノ株式会社 | Organic arsenic compound processing method |
| JP2006239507A (en) * | 2005-03-01 | 2006-09-14 | Kobe Steel Ltd | Organic arsenic compound-containing water treatment method and apparatus |
| JP4522302B2 (en) * | 2005-03-31 | 2010-08-11 | 株式会社クボタ | Detoxification method of organic arsenic |
| FI122512B (en) * | 2011-03-09 | 2012-02-29 | Outotec Oyj | Process for the preparation of a highly soluble calcium arsenic compound |
| CN103359849A (en) * | 2012-06-26 | 2013-10-23 | 浙江工商大学 | Method for treating arsenic-containing organic wastewater with high salt |
| US9771284B2 (en) * | 2013-12-30 | 2017-09-26 | Environmental Technology and Investment Corporation | Situ chemical fixaton of metal contaminants |
| CN107032516A (en) * | 2016-10-31 | 2017-08-11 | 江西稀有金属钨业控股集团有限公司 | A kind of processing method of tungsten mineral material baking flue gas spent shower water |
| CN106477768A (en) * | 2016-10-31 | 2017-03-08 | 江西稀有金属钨业控股集团有限公司 | A kind of processing method of tungsten mineral material baking flue gas spent shower water |
| CN116395910B (en) * | 2023-05-31 | 2026-04-24 | 鹤庆北衙矿业有限公司 | A process and supporting equipment for the treatment and comprehensive utilization of arsenic-containing acidic wastewater from gold smelting. |
-
1984
- 1984-09-11 JP JP18997284A patent/JPS6168191A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6168191A (en) | 1986-04-08 |
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