氧化混凝沉淀与粉末活性炭除砷效果比较

Comparison of treatment arsenic by oxidation coagulation sedimentation and powered activated carbon

研究了氧化混凝沉淀法和粉末活性炭吸附法对砷的去除效果,并进行对比分析。废水沉淀后上清液砷含量为260~280 mg/L,使用过氧化氢氧化后再加入三氯化铁混凝,砷的去除率可达98%以上。使用粉末活性炭进行吸附,砷的去除率最高为70%。研究结果表明:氧化混凝沉淀法对砷的去除优于活性炭吸附法,氧化混凝沉淀后回用清液砷含量在5 mg/L以下。

Oxidation coagulation sedimentation and powdered activated carbon adsorption of arsenic removal efficiency are studied,and comparative analysis is carried on.After sedimentation,the arsenic content in the liquid was 260-280 mg/L.Using hydrogen peroxide oxidation and adding iron chloride coagulation,the arsenic removal rate could reach more than 98%.Using powder active carbon adsorption,the highest arsenic removal rate was 70%.Results showed that oxidation coagulation sedimentation for arsenic removal is better than activated carbon adsorption.After oxidation coagulation precipitation,the arsenic content of the recycling solution was below 5 mg/L.