碱性氯化法处理某金矿遗留含氰废水  

Treatment of cyanide-containing wastewater from a gold mine by alkaline chlorination process

作　　者：王洋 王宝山[1] 高慧娟 张泽玺 WANG Yang;WANG Bao-shan;GAO Hui-juan;ZHANG Ze-xi

机构地区：[1]兰州交通大学环境与市政工程学院,甘肃兰州730070

出　　处：《中国有色冶金》2020年第1期69-72,共4页China Nonferrous Metallurgy

基　　金：甘肃省重点研发计划项目(17YF1FA114)。

摘　　要：针对某金矿遗留含氰废水中氰化物严重超标,采用简便高效的碱性氯化法对该废水进行处理,选用二氯异氰尿酸钠作为氯系氧化物。28 d的间歇运行结果表明:1250 m 3含氰废水的氰化物浓度从88.97 mg/L减少至0.368 mg/L,去除率为99.6%,达到了《污水综合排放标准》(GB8978—1996)一级标准的要求,消除了遗留废水对周边生态环境及人们生命健康的威胁;随着废水中氰化物浓度的减少,二氯异氰尿酸钠的实际投加量与理论计算量的比值逐渐增大;废水的余氯浓度对处理效果有一定的指示作用。In view of the serious excess of cyanide in the cyanide-containing wastewater left in a gold mine,the wastewater was treated by a simple and efficient alkaline chlorination process and select sodium dichloroisocyanurate as the chlorine oxide.After 28 days of intermittent operation,the result showed that the cyanide concentration of 1250 m 3 cyanide wastewater decreased from 88.97 mg/L to 0.368 mg/L,and the removal efficiency of cyanide was 99.6%,which satisfied the first class standard of the integrated wastewater discharge standard(GB8978—1996)and removed the threat of the cyanide wastewater to the surrounding ecological environment and people's life and health.As the concentration of cyanide in the wastewater decreases,the ratio of the actual dosage of sodium dichloroisocyanurate to the theoretical calculation increases.The concentration of residual chlorine in cyanide wastewater can be used as an indicator for the treatment efficiency.

关 键 词：含氰废水 碱性氯化法 二氯异氰尿酸钠 余氯 

分 类 号：X758[环境科学与工程—环境工程] TF831[冶金工程—有色金属冶金]