| 重金属絮凝剂PEX对水中铅的去除性能研究 |
| |
| 引用本文： | 韩晓婷,常青,王刚,张明月.重金属絮凝剂PEX对水中铅的去除性能研究[J].环境科学与技术,2013(1):44-47. |
| |
| 作者姓名： | 韩晓婷 常青 王刚 张明月 |
| |
| 作者单位： | 兰州交通大学环境与市政工程学院 |
| |
| 基金项目： | 国家自然科学基金资助项目(20377020);金川公司预研基金(420032) |
| |
| 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%。
|
| 关 键 词： | 高分子重金属絮凝剂 铅离子 絮凝 螯合沉淀 |
Removal of Pb(Ⅱ) in Wastewater with Heavy Metal Flocculants PEX |
| |
| HAN Xiao-ting,CHANG Qin,WANG Gang,ZHANG Ming-yue.Removal of Pb(Ⅱ) in Wastewater with Heavy Metal Flocculants PEX[J].Environmental Science and Technology,2013(1):44-47. |
| |
| Authors: | HAN Xiao-ting CHANG Qin WANG Gang ZHANG Ming-yue |
| |
| Institution: | (School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China) |
| |
| Abstract: | 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. |
| |
| Keywords: | macromolecule heavy metal flocculants lead ion flocculation chelation precipitation |
| 本文献已被 CNKI 等数据库收录！ |
|
