用亚铁离子和钙离子协同沉淀柠檬酸盐镀镍废水中的配位剂  

Precipitation of complexant in citrate nickel electroplating wastewater by ferrous and calcium ions synergistically

作　　者：郭崇武[1] 陈康[1] GUO Chongwu;CHEN Kang(Guangzhou Ultra Union Chemicals Ltd.,Guangzhou 510460,China)

机构地区：[1]广州超邦化工有限公司,广东广州510460

出　　处：《电镀与涂饰》2021年第3期225-228,共4页Electroplating & Finishing

摘　　要：研究了亚铁离子和钙离子沉淀含羧基配位剂时的协同效应。在pH为10.5~12.5的条件下,用亚铁离子和钙离子共同沉淀柠檬酸盐镀镍废水中的配位剂,并令从配合物中释放出来的镍离子生成氢氧化镍沉淀。本方法简单、快速、成本低,出水的总镍、总铁和化学需氧量能至少达到《电镀污染物排放标准》(GB 21900–2008)的"表2"要求。The synergistic effect of ferrous and calcium ions on precipitation of carboxylic acid complexant was studied.Ferrous and calcium ions were used to precipitate the complexant in citrate nickel electroplating wastewater within pH range from 10.5 to 12.5,and the nickel ions released from the complexes were precipitated as nickel hydroxide.This method is simple,rapid,and cost-efficient.The total nickel,total iron,and chemical oxygen demand of the effluent are at least compliant with the Table 2 of the Emission Standard of Pollutants for Electroplating(GB 21900-2008).

关 键 词：柠檬酸盐镀镍 废水处理 羧酸配位剂 亚铁离子 钙离子 协同效应 沉淀 

分 类 号：TQ153.12[化学工程—电化学工业] X781.1[环境科学与工程—环境工程]