摘要
在合成高分子重金属絮凝剂聚乙烯亚胺基黄原酸钠(PEX)的基础上,研究了该絮凝剂处理含铅离子废水的效能,并对一些影响因素进行了考查。研究结果表明:高分子重金属絮凝剂PEX对铅离子的捕集效率较高,去除率可达90%以上;pH值对PEX去除铅离子有一定的影响,pH=5.0时去除效果最好;Mg2+﹑Ca2+、EDTA、柠檬酸、焦磷酸钠以及致浊物质的存在均能促进铅离子的去除;絮体残渣稳定性好,金属离子易回收,回收率可达到70.0%。
Flocculation performance of polyethyleneimine sodium xanthogente（PEX） was evaluated by using wastewater containing Pb2 ＋.Some factors which affected removal of Pb2 ＋ were also studied.Experimental results showed that PEX has strong binding capabilities with Pb2＋,with removal rate of Pb2＋ above 90%.pH value has effect on the removal rate of Pb2＋,and when pH value equals 5.0,the best removal rate can be obtained.Mg2＋,Ca2＋,EDTA,citric acid,sodium pyrophosphate and turbidity can promote the removal rate of Pb2＋ to different extents respectively.Stability of flocculate chelates is prominent,therefore the leaching-out is very low.It is easy to recover Pb2＋ from the flocs,and recovery rate reached 70.0% after soaking the sludge in nitric acid.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2013年第1期44-47,共4页
Environmental Science & Technology
基金
国家自然科学基金资助项目(20377020)
金川公司预研基金(420032)
关键词
高分子重金属絮凝剂
铅离子
絮凝
螯合沉淀
macromolecule heavy metal flocculants
lead ion
flocculation
chelation precipitation
