生物聚合硫酸铁去除铅离子的絮凝机理研究  

Flocculation Mechanism of Pb2+ by Bio-polymeric Ferric Sulfate

作　　者：郭亚丹[1] 宫志恒 李玲[1] 梁平[1] 王学刚[1] 张卫民[1] GUO Ya-dan;GONG Zhi-heng;LI Ling;LIANG Ping;WANG Xue-gang;ZHANG Wei-min(School of Water Resources and Environmental Engineering,East China University of Technology,Nanchang 330013,China)

机构地区：[1]东华理工大学水资源与环境工程学院

出　　处：《东华理工大学学报（自然科学版）》2019年第3期279-284,共6页Journal of East China University of Technology(Natural Science)

基　　金：江西省自然科学基金项目(20171BAB213019);江西省博士后科研择优资助项目(2016KY33);东华理工大学研究生创新项目(YC2017-S281,DHYC-201818)

摘　　要：利用生物聚合硫酸铁絮凝剂对废水中Pb^2+进行絮凝实验及机理研究。探讨了pH值、Pb^2+初始浓度、投加量、反应时间和温度对絮凝效果的影响。最佳工艺条件为:BPFS投加量5%、pH6、反应温度20℃及搅拌时间30min,Pb^2+去除率可达到98%,絮凝性能优于传统絮凝剂。通过XRD、FT-IR及XPS表征分析絮凝机理可知,生物聚合硫酸铁絮凝剂在处理含铅废水过程中可提供大量羟基硫酸铁聚合物,Pb^2+会与羟基发生络合,在聚合和网捕作用下迅速脱稳聚沉。Flocculation experiment and mechanism of Pb^2+in wastewater by biological polymeric ferric sulfate flocculant were studied.The effects of pH value,initial concentration of Pb^2+,dosage,reaction time and temperature on the flocculation effect were investigated.The optimum conditions are as follows:BPFS dosage 5%,pH 6,reaction temperature 20℃and stirring time 30 min.The Pb^2+removal rate can reach 98%,and the flocculation performance is better than traditional flocculant.The flocculation mechanism was analyzed by XRD,FT-IR and XPS,it is found that the bio-polymeric ferric sulfate flocculant can provide a large number of hydroxy ferric sulfate polymer in the process of treating lead containing wastewater.And Pb^2+will be complexed with hydroxyl group,then it will be rapidly destabilized and flocculated.

关 键 词：生物聚合硫酸铁 絮凝 动力学 PB^2+ 

分 类 号：X703.1[环境科学与工程—环境工程]