二氧化氯氧化法处理含氰废水试验研究  

Experimental Study on Treatment of Cyanide Containing Wastewater by Chlorine Dioxide Oxidation

作　　者：白雪松 冉飞[1] 孙守琴[1] 常瑞英[1] BAI Xue-song;RAN Fei;SUN Shou-qin;CHANG Rui-ying(Key Laboratory of Mountain Surface Processes and Ecological Regulation,Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu 610041,Sichuan,China)

机构地区：[1]中国科学院成都山地灾害与环境研究所山地表生过程与生态调控重点实验室,四川成都610041

出　　处：《矿冶工程》2021年第3期84-86,91,共4页Mining and Metallurgical Engineering

基　　金：国家科技基础条件平台建设(Y2D3550550);国家973计划及攀登计划课题(Y6A1480480)。

摘　　要：针对某含氰含铜废液,采用二氧化氯氧化法脱除废液中氰,再用硫化法沉淀回收溶液中铜。结果表明,二氧化氯氧化法除氰合理工艺条件为:反应温度25℃、溶液初始pH=9.5、反应时间60 min、二氧化氯气体流速60 mL/min,此时除氰率达到96%以上;硫化沉淀法回收除氰后液中的铜,合理工艺条件为:反应温度25℃、反应时间60 min、溶液初始pH=3、搅拌速度300 r/min、硫化钠用量为理论量3倍,此时沉铜率达到93%以上。Some wastewater containing cyanide and copper was taken in an experiment,firstly to remove the cyanide therein by chlorine dioxide oxidation method and to precipitate the copper by sulfidation.The results showed that chlorine dioxide oxidation for removing cyanide was operated at 25℃for 60 min,with an initial pH of 9.5 for the solution,and flow rate of chlorine dioxide at 60 mL/min,leading to the cyanide removal rate exceeding 96%.After that,the sulfidation reaction for precipitation,running at 25℃for 60 min,with an initial pH of 3 for the soultion,a stirring speed at 300 r/min,and the consumption of sodium sulfide 3 times the theoretical amount,resulted in the copper precipitation rate exceeding 93%.

关 键 词：含铜废液 含氰废液 二氧化氯 脱氰 硫化法 沉铜 

分 类 号：X703[环境科学与工程—环境工程]