GUO Chongwu,CHEN Kang.Method for Treatment of Trivalent Chromium Cr-Plating Wastewater[J].Plating & Finishing,2020,(12):43-46.[doi:10.3969/j.issn.1001-3849.2020.12.0090]
三价铬镀铬废水的处理方法
- Title:
- Method for Treatment of Trivalent Chromium Cr-Plating Wastewater
- Keywords:
- trivalent chromium Cr-plating electroplating wastewater treatment method synergistic effect
- 分类号:
- TQ153.2
- 文献标志码:
- A
- 摘要:
- 利用亚铁离子与钙离子的协同效应，用亚铁离子和钙离子沉淀废水中的羧酸配位剂，从配合物中释放出来三价铬生成氢氧化铬沉淀，从而有效去除三价铬。用次氯酸钠溶液作氧化剂，降低废水的COD。废水处理方法简单、速度快、成本低，处理结果满足GB 21900-2008 《电镀污染物排放标准》的要求。
- Abstract:
- The carboxylic acid coordination agents in trivalent chromium Cr-plating wastewater were precipitated by means of the synergistic effect of ferrous and calcium ions, and then the trivalent chromium ions released from the complex formed a chromium hydroxide precipitate, which effectively removed the trivalent chromium. Sodium hypochlorite solution was used as oxidant to reduce COD in the wastewater. The treatment method is simple and fast, and it has low cost. The treatment results meet the requirements of 《Emission Standard of Pollutants for Electroplating》 （GB 21900?2008）.
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备注/Memo
收稿日期： 2020-02-20；修回日期： 2020-04-25
作者简介： 郭崇武（1960-），男，吉林辉南人，学士，腐蚀与防护高级工程师，从事电镀添加剂与电镀工艺开发工作，Email：chongwu.guo@ultro-union.com