化学捕收絮凝沉降废水中铅离子的研究  

The Study of Pb(Ⅱ) in the Waste Water by Chemical Trapping and Flocculating Settlement

作　　者：沈友良[1] 欧阳萌[1] 聂基兰[1] 

机构地区：[1]南昌大学化学系,江西南昌330047

出　　处：《江西化工》2005年第1期85-88,共4页Jiangxi Chemical Industry

摘　　要：本文采用铜试剂作为废水中铅的化学捕收剂,以明矾(alum)和PAM为复合絮凝剂沉降络合物胶体,取得了很好的效果。常温下,调节pH值为6.0 ,在最优化的配比时,铅的去除率在98%以上。尤其当水中铅的浓度低于1 0 0mg/L时,经过该方法处理的水,铅的浓度低于1 .0mg/L ,符合GB8978—1 996一类污染物的排放标准;本方法处理废水中的铅,生成的絮体粒径大,强度高,适宜于沉降分离,沉降时间在3 0min左右。Lead were trapped by DDTC in the wastewater,and were flocculated by composite flocculate PAM/alum,it get a good result.When the pH value was changed to 6.0,the removal ratio of lead reached 98%,with the optimization dosage of the composite flocculation on the room temperature. The consistency of lead were reduced to 1.0mg/L,it fit for the GB8978-1996.In this condnions,the bigger and stronger flocculation were produced,and it can subsided fast,the settlement time of the flocculation was about thirties minutes.

关 键 词：废水 絮凝沉降 GB8978-1996 化学 铅离子 复合絮凝剂 排放标准 沉降分离 沉降时间 捕收剂 铜试剂 络合物 PAM pH值 最优化 去除率 污染物 浓度 

分 类 号：X703.1[环境科学与工程—环境工程]