镀铬废水中总氰化物来源浅析  

Investigation into Total Cyanide Presence in Chromium-plating Process Effluent

作　　者：郑荣周 黄晓荣 王秋娟 

机构地区：[1]重庆市荣昌县环境监测站,重庆荣昌402460

出　　处：《三峡环境与生态》2013年第A01期22-24,49,共4页Environment and Ecology in the Three Gorges

摘　　要：为追溯镀铬废水中检出总氰化物的原因,从生产工艺、废水组成、所用物料以及总氰化物的测定方法等环节进行分析,最终发现镀铬废水中总氰化物是由分析中Na2-EDTA被铬酸氧化所形成的分解产物。In order to investigate the presence of total cyanide in chromium-plating process effluent, the author exam- ined the production process technology, effluent composition, consumed materials in the production process as well as measurement method for total cyanide. The paper finds that the presence of total cyanide in the effluent plated by chromium is the by-product of Na2-EDTA, which acted as agent in measurement of total cyanide. More specifically, it showed Na2-EDTA was originally oxidized by chromic acid , later on, it experienced decomposition and produced total cyanide as the one of the by-products.

关 键 词：镀铬废水 总氰化物 来源 

分 类 号：X781.1[环境科学与工程—环境工程]