摘要
为优化电镀园区废水重金属处理效果,以氧化+还原+中和+沉淀为主体工艺,应用了高级氧化破络技术和电化学技术。结果表明:采用次氯酸钠氧化破络、中和沉淀、螯合树脂交换吸附等工艺处理含镍废水,总镍浓度降可至0.05 mg/L;采用焦亚硫酸钠还原法处理含铬废水,Cr^6+、总铬浓度分别降至0.003~0.005 mg/L和0.1~0.2 mg/L;采用多级氧化破络预处理络合废水,并通过多级物化工艺结合电化学反应处理非一类污染物废水,总排放口总镍、总铬、总铜、总锌、氰化物浓度分别降至0.08、0.1、0.05、0.04和0.01 mg/L。
In order to optimize the treatment effect of heavy metals from the wastewater in an electroplating park,the main process of oxidation + reduction + neutralization + precipitation with advanced oxidation breaking complex technology and electrochemical technology were applied. The results showed that the total nickel concentration could be reduced to 0.05 mg/L by breaking complex with sodium hypochlorite oxidation,neutralization & precipitation and exchange adsorption with chelating resin. The concentration of Cr^6+and total chromium decreased to 0.003 ~ 0.005 mg/L and 0.1 ~ 0.2 mg/L respectively by sodium pyrosulfite reduction method. The complex wastewater was pretreated by multi-stage oxidation. Non class I pollutant wastewater was treated by multi-stage physicochemical process and electrochemical reaction. As a result,the concentrations of total nickel,chromium,copper,zinc and cyanide in the main discharge outlet were decreased to 0.08,0.1,0.05,0.04 and 0.01 mg/L,respectively.
作者
刘臣亮
LIU Chenliang(Hangzhou Environmental Research Institute of China Coal Technology&Engineering Group,Hangzhou 311201,China)
出处
《能源环境保护》
2020年第4期46-50,共5页
Energy Environmental Protection
关键词
电镀工业园区
电镀废水
工艺设计
Electroplating industrial park
Electroplating wastewater
Technological design
