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182408-基于沉淀法的化学镀镍废水处理工艺

   作者:李小花,郭崇武,吴梅娟    单位:广州超邦化工有限公司    日期:2019-01-03     浏览:536    评论:0    
提示:中文核心期刊,中国科技核心期刊!DOI: 10.19289/j.1004-227x.2018.24.008基于沉淀法的化学镀镍废水处理工艺李小花*,郭崇武,吴
 

中文核心期刊,中国科技核心期刊!

DOI: 10.19289/j.1004-227x.2018.24.008

基于沉淀法的化学镀镍废水处理工艺

李小花*,郭崇武,吴梅娟(广州超邦化工有限公司,广东 广州 510460)

摘要:在pH 为4 ~ 6 的条件下,以二甲基二硫代氨基甲酸钠或二乙基二硫代氨基甲酸钠作为螯合剂与化学镀镍废水中的镍离子反应生成沉淀,过滤分离沉淀物。然后调节并保持废水的pH 为11 ~ 12,加双氧水氧化次磷酸根、剩余的螯合剂以及其他有机物(如柠檬酸和乳酸),再加氯化钙沉淀由次磷酸根氧化生成的磷酸根。镍的出水浓度可满足GB 21900–2008《电镀污染物排放标准》中“表3”的要求。

关键词:化学镀镍;废水处理;镍离子;螯合剂;沉淀;柠檬酸;氧化

中图分类号:TQ153.2; X781.1 

文献标志码:A 

文章编号:1004 – 227X (2018) 24 – 1151 – 04

Process for treatment of the wastewater discharged from electroless nickel plating production based on

chelating precipitation // LI Xiao-hua*, GUO Chong-wu, WU Mei-juan

Abstract: The nickel ions in electroless nickel plating wastewater were removed by precipitation with chelating agent suchas sodium dimethyldithiocarbamate and sodium diethyldithiocarbamate at pH 4-6, and the precipitates were filtered out.The filtrate was adjusted to pH 11-12, and then the sodium hypophosphite, residual chelating agent, and other organic substances (such as citric acid and lactic acid) in it were oxidized by adding H2O2. The phosphate produced by the oxidation of hypophosphite was precipitated by calcium chloride. The effluent Ni concentration met the requirement of the Table 3 stipulated by the Emission Standard of Pollutants for Electroplating (GB 21900–2008).

Keywords: electroless nickel plating; wastewater treatment; nickel ion; chelating agent; precipitation; citric acid;oxidation

First-author’s address: Guangzhou Ultra Union Chemicals Ltd., Guangzhou 510460, China

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