2种新型重金属絮凝剂复配处理含铜废水

采用2种新型重金属絮凝剂巯基乙酰化胺甲基聚丙烯酰胺(MAAPAM)和聚乙烯亚胺基黄原酸钠(PEX)处理含铜废水,分别考察了其单独和复配处理对废水中Cu2+的去除效果。结果表明,PEX和MAAPAM对不同Cu2+浓度的废水均具有良好的去除性能,且PEX对Cu2+的去除效果优于MAAPAM。当采用PEX和MAAPAM复配处理含Cu2+废水(Cu2+质量浓度为100 mg/L,pH为6.0)时,先投加340 mg/L的MAAPAM进行絮凝试验,在快搅2 min时投加10 mg/L的PEX继续搅拌,出水中Cu2+的剩余浓度可以满足排放标准要求,且具有较低的处理成本。

Treatment of copper-containing wastewater with the two compound novel heavy metal flocculants

Copper-containing wastewater was treated by two kinds of novel heavy metal flocculant,called mercaptoa-cetyl aminomethyl-polyacrylamide(MAAPAM)and polyethyleneimine-sodium xanthogenate(PEX),respectively.The removal effect of Cu2+in wastewater was investigated by using two flocculants separately and in pairs.The results showed that PEX and MAAPAM had excellent performance for removing wastewater with different Cu2+concentra-tions,and PEX had better removal effect on Cu2+than MAAPAM.In the flocculation test,when 340 mg/L of MAAPAM was first added in the copper-containing wastewater with initial Cu2+concentration of 100 mg/L at pH 6.0,and then 10 mg/L of PEX was added after stirring the mixture rapidly for 2 min,the residual concentration of Cu2+in the efflu-ent could meet the discharge standard and had lower treatment costs.