JPH02229593A - Treatment of waste water containing trichloroethylene or the like - Google Patents
Treatment of waste water containing trichloroethylene or the likeInfo
- Publication number
- JPH02229593A JPH02229593A JP4961389A JP4961389A JPH02229593A JP H02229593 A JPH02229593 A JP H02229593A JP 4961389 A JP4961389 A JP 4961389A JP 4961389 A JP4961389 A JP 4961389A JP H02229593 A JPH02229593 A JP H02229593A
- Authority
- JP
- Japan
- Prior art keywords
- waste water
- permanganate
- trichlorethylene
- trichloroethylene
- treatment
- 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.)
- Granted
Links
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 239000002351 wastewater Substances 0.000 title claims abstract description 13
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 title abstract 4
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229950011008 tetrachloroethylene Drugs 0.000 claims abstract description 3
- 239000007800 oxidant agent Substances 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 2
- 238000000354 decomposition reaction Methods 0.000 abstract description 8
- 230000003647 oxidation Effects 0.000 abstract description 6
- 238000007254 oxidation reaction Methods 0.000 abstract description 6
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 abstract description 4
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 abstract description 2
- 230000002378 acidificating effect Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000012286 potassium permanganate Substances 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- CREMABGTGYGIQB-UHFFFAOYSA-N carbon carbon Chemical compound C.C CREMABGTGYGIQB-UHFFFAOYSA-N 0.000 description 1
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005108 dry cleaning Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明は、半導体産業、ドライクリーニング業、金属部
品製造業などで部品洗浄に使用したトリクロロエチレン
やテトラクロロエチレン（以下、トリクロロエチレン等
と記す）を回収する際、油水分離装置等から排出される
トリクロロエチレン等含有排水を処理し無害化するため
に用いられる．［従来技術およびそ−の問題点］
排水中のトリクロロエチレン等の分解技術としては、従
来よりオゾン酸化法、紫外線分解法、フエントン試薬に
よる酸化法などある．しかし、オゾン酸化、紫外線分解
はこれら化学物質に対しては不確実であり、フエントン
酸化では多量の試薬及び加熱を必要とするためコストが
かさむ等の問題があり、安価で確実な分解法の開発が望
まれていた．
［発明の課題］
本発明は、過マンガン酸塩を必要量排水に加えることに
より、水溶液系で室温においてトリクロロエチレン等を
選択的に酸化分解する方法である．従って、本発明の目
的は、従来の方法の問題点を解決できるトリクロロエチ
レン等含有排水の処理方法を提供することにある。[Detailed Description of the Invention] [Industrial Application Fields] The present invention is for recovering trichlorethylene and tetrachlorethylene (hereinafter referred to as trichlorethylene, etc.) used for cleaning parts in the semiconductor industry, dry cleaning industry, metal parts manufacturing industry, etc. It is used to treat and render harmless wastewater containing trichlorethylene etc. discharged from oil/water separators. [Prior art and its problems] Conventional techniques for decomposing trichlorethylene, etc. in wastewater include ozone oxidation, ultraviolet decomposition, and oxidation using Fuenton's reagent. However, ozone oxidation and ultraviolet decomposition are uncertain for these chemical substances, and Fuenton oxidation requires a large amount of reagents and heating, which increases costs. was desired. [Problem to be solved by the invention] The present invention is a method for selectively oxidizing and decomposing trichlorethylene and the like at room temperature in an aqueous solution system by adding a required amount of permanganate to wastewater. Therefore, an object of the present invention is to provide a method for treating wastewater containing trichlorethylene, etc., which can solve the problems of the conventional methods.
［：！ｌ！題を解決するための手段コ
本発明は、トリクロロエチレン等含有排水（酸性であれ
ばｐＨ６〜９の範囲に中和しておく）に過マンガン酸塩
を加え、次式の反応によりトリクロロエチレンを酸化分
解する方法である．Ｃ２ＨＣＯ ａ ＋ ２Ｍｎ０４−
→２ＣＯ２ ＋ ３ＣＱ − ＋ Ｈ” ＋ ２Ｍｎ
０２ ↓本反応はすみやかに進行し、過マンガン酸塩濃
度０．０１Ｍの時、２５℃、２時間でトリクロロエチレ
ンを９９％分解できる．炭素一炭素不飽和結合を持たな
いアルコール、ケトン、糖等は中性では過マンガン酸塩
と反応せず処理を妨害しない．未反応の過マンガン酸は
亜硫酸塩を加えることにより、次式のように二酸化マン
ガンとして分離・回収できる．（残存Ｍｎ濃度ｏ．ｔｐ
ρ一以下）２ＭｎＯ． ＋ ３５０３” ＋ ２８”−
ｅ ３５０，２− ＋ ８２０＋ ２Ｍｎ０２↓［実施
例コ
本発明の実施例を図面（第１図）に基づいて説明する．
トリクロロエチレンを含有する排水ＡＩ１３を処理槽に
とり、過マンガン酸カリウム溶液をＢｒａ３加え混合す
る．冬期は反応槽を２５℃程度に保温するか、処理時間
を長くとる必要がある．放置すれば分解は完了する．そ
の後、過マンガン酸の赤紫色が消えるまで１０％亜硫酸
ナトリウム溶液を加え混合後静置すればマンガンは酸化
物として沈澱し分離・回収できる．
本発明で対象とする排水中のトリクロロエチレン濃度は
１〜１０００ρρ−程度であるが、６時間でトリク口口
エチレン濃度を０．１ ｐｐｍまで分解するために必要
なＢ／Ａ（体積比）は０．１ Ｍ （１．６％）過マン
ガン酸カリウム溶液を用いる場合、次のようになる．
トリクロロエチレン濃度 Ｂ／Ａ１ ｐｐｍ＋
１／１００１０
１／Ｔｏ１００
１／３３１０００ １／１３
処理におけるトリクロロエチレン分解への過マンガン酸
塩濃度の影響を第２図に示す。トリクロロエチレンの、
初期濃度に対し分解後残っている濃度の割合、残存率の
経時変化を、過マンガン酸塩濃度ごとに示してある．
［発明の効果コ
本発明は、以上説明したように、比較的少量の試薬で、
トリクロロエチレンを選択的に分解処理することを可能
とした．[:! l! Means for Solving the Problem The present invention involves adding permanganate to wastewater containing trichlorethylene, etc. (if acidic, neutralize it to a pH range of 6 to 9), and oxidatively decomposing trichlorethylene by the reaction of the following formula. This is the way to do it. C2HCO a + 2Mn04-
→2CO2 + 3CQ − + H” + 2Mn
02 ↓This reaction proceeds quickly, and when the permanganate concentration is 0.01M, 99% of trichlorethylene can be decomposed in 2 hours at 25°C. Alcohols, ketones, sugars, etc. that do not have carbon-carbon unsaturated bonds do not react with permanganate in neutral conditions and do not interfere with the treatment. Unreacted permanganic acid can be separated and recovered as manganese dioxide by adding sulfite as shown in the following formula. (Residual Mn concentration o.tp
ρ1 or less) 2MnO. + 3503" + 28"-
e 350,2- + 820+ 2Mn02↓ [Example] An example of the present invention will be explained based on the drawings (Fig. 1). Take wastewater AI13 containing trichlorethylene into a treatment tank, add potassium permanganate solution Bra3 and mix. In winter, it is necessary to keep the reaction tank at around 25°C or to extend the treatment time. If you leave it alone, the decomposition will be completed. Then, add 10% sodium sulfite solution until the reddish-purple color of permanganic acid disappears, mix and leave to stand. Manganese will precipitate as an oxide and can be separated and recovered. The trichlorethylene concentration in wastewater targeted by the present invention is approximately 1 to 1000 pρ-, but the B/A (volume ratio) required to decompose the trichlorethylene concentration to 0.1 ppm in 6 hours is 0. When using .1 M (1.6%) potassium permanganate solution, the result is as follows. Trichlorethylene concentration B/A1 ppm+
1/10010
1/To100
1/331000 1/13
The effect of permanganate concentration on trichlorethylene decomposition during processing is shown in Figure 2. of trichlorethylene,
The ratio of the concentration remaining after decomposition to the initial concentration and the change in the residual rate over time are shown for each permanganate concentration. [Effects of the Invention] As explained above, the present invention is capable of using a relatively small amount of reagent.
This made it possible to selectively decompose trichlorethylene.
第１図は、トリクロロエチレン等含有排水を本発明によ
り処理する実例のフローダイアグラムである．
第２図は、２５℃におけるトリクロロエチレン（初濃度
４．４ｐｐｍ）の分解速度を過マンガン酸塩濃度ごとに
示したものである．
第１図Figure 1 is a flow diagram of an example of treating wastewater containing trichlorethylene, etc. according to the present invention. Figure 2 shows the decomposition rate of trichlorethylene (initial concentration 4.4 ppm) at 25°C for each permanganate concentration. Figure 1
Claims (1)
エチレン又はテトラクロロエチレンを酸化分解処理する
方法(1) Method of oxidizing and decomposing trichlorethylene or tetrachlorethylene in wastewater using a permanganate-based oxidizing agent
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4961389A JPH02229593A (en) | 1989-03-01 | 1989-03-01 | Treatment of waste water containing trichloroethylene or the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4961389A JPH02229593A (en) | 1989-03-01 | 1989-03-01 | Treatment of waste water containing trichloroethylene or the like |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02229593A true JPH02229593A (en) | 1990-09-12 |
| JPH0336598B2 JPH0336598B2 (en) | 1991-05-31 |
Family
ID=12836087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4961389A Granted JPH02229593A (en) | 1989-03-01 | 1989-03-01 | Treatment of waste water containing trichloroethylene or the like |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02229593A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07108281A (en) * | 1993-10-13 | 1995-04-25 | Kurita Water Ind Ltd | Method for removing manganese ion |
| JP2003053357A (en) * | 2001-08-20 | 2003-02-25 | Kurita Water Ind Ltd | Method and device for reducing water containing permanganate |
| CZ301390B6 (en) * | 2006-08-03 | 2010-02-10 | Dekonta, A. S. | Reclamation process of chlorinated ethylene-contaminated rock medium by employing in-situ chemical oxidation method with protracted reclamation effect |
| CN105600985A (en) * | 2015-12-28 | 2016-05-25 | 北京北方节能环保有限公司 | Method for treating wastewater produced by hopcalite |
| CN106830436A (en) * | 2017-03-13 | 2017-06-13 | 同济大学 | A kind of method for pre-oxidizing for drinking water treatment |
| WO2019181185A1 (en) * | 2018-03-22 | 2019-09-26 | 株式会社大阪ソーダ | Metal treatment agent and method for treating metal in liquid phase |
-
1989
- 1989-03-01 JP JP4961389A patent/JPH02229593A/en active Granted
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07108281A (en) * | 1993-10-13 | 1995-04-25 | Kurita Water Ind Ltd | Method for removing manganese ion |
| JP2003053357A (en) * | 2001-08-20 | 2003-02-25 | Kurita Water Ind Ltd | Method and device for reducing water containing permanganate |
| CZ301390B6 (en) * | 2006-08-03 | 2010-02-10 | Dekonta, A. S. | Reclamation process of chlorinated ethylene-contaminated rock medium by employing in-situ chemical oxidation method with protracted reclamation effect |
| CN105600985A (en) * | 2015-12-28 | 2016-05-25 | 北京北方节能环保有限公司 | Method for treating wastewater produced by hopcalite |
| CN106830436A (en) * | 2017-03-13 | 2017-06-13 | 同济大学 | A kind of method for pre-oxidizing for drinking water treatment |
| CN106830436B (en) * | 2017-03-13 | 2020-05-05 | 同济大学 | Pre-oxidation method for drinking water treatment |
| WO2019181185A1 (en) * | 2018-03-22 | 2019-09-26 | 株式会社大阪ソーダ | Metal treatment agent and method for treating metal in liquid phase |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0336598B2 (en) | 1991-05-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |