シアン化亜鉛めっき排水中の鉄シアノ錯体の沈殿除去
書誌事項
- タイトル別名
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- Removal by precipitation of the iron cyanide complexes in waste water from cyanide zinc electroplating.
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説明
(1) [Fe(CN)6]3- in aqueous solution was efficiently removed as Zn2Fe(CN)6 by reducing it with a mixed reducing agent of sulfite and thiosulfate ions (1:1) in the presence of Zn2+. In this process, moreover, trace amounts of Cu2+ were found to accelerate the reduction of [Fe(CN)6]3- markedly owing to a synergistic action with Zn2+.<br>(2) The above process was applied to the removal of the remaining [Fe(CN)6]3- after alkaline chlorination of waste water from cyanide zinc electroplating solutions. As a result, total cyanide concentration was reduced to a level of less than 0.1ppm except when Ni was present, and it was possible to automate the whole operation from alkaline chlorination to the remeval of [Fe(CN)6]3-.<br>(3) The volume of cyanide-bearing sludge produced by the treatment of electroplating waste water containing cyanides can be greatly decreased by the above process involving the reduction of [Fe(CN)6]3- in the vicinity of pH6, followed by separation of the precipitate formed.<br>(4) In processing electroplating waste water containing Ni, the primary alkaline chlorination treatment should be carried out by a batch process to make sure that the destruction of [Ni(CN)4]2- is complete.
収録刊行物
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- 金属表面技術
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金属表面技術 37 (3), 137-143, 1986
一般社団法人 表面技術協会
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詳細情報 詳細情報について
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- CRID
- 1390282679089201152
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- NII論文ID
- 130003810052
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- ISSN
- 18843395
- 00260614
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可