温敏性超支化聚合物淋洗重金属污染底泥研究  

Study on leaching of heavy metal contaminated sediment with temperature-sensitive hyperbranched polymer

作　　者：刘叶 陈靓 徐帆 耿瑞雯 陈启光 白王军 祝建中[1] LIU Ye;CHEN Liang;XU Fan;GENG Rui-wen;CHEN Qi-guangi;BAI Wang-jun;ZHU Jian-zhong(Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes,Ministry of Education,College of Environment,Hohai University,Nanjing 210089,China;Management Division of Qinhuai River Hydraulic Engineering of Jiangsu Province,Nanjing 210089,China;Hohai University Design Institute Co.,Ltd,Nanjing 210098,China)

机构地区：[1]河海大学环境学院,浅水湖泊综合治理与资源开发教育部重点实验室,江苏南京210098 [2]江苏省秦淮河水利工程管理处,江苏南京210022 [3]河海大学设计研究院有限公司,江苏南京210098

出　　处：《中国环境科学》2024年第4期2130-2136,共7页China Environmental Science

基　　金：江苏省水利科技项目(2022036);国家自然科学基金资助项目(51979077)。

摘　　要：以三羟甲基丙烷为核,缩水甘油为聚合单体,合成了超支化聚缩水甘油,再加入正辛酸进行表面改性得到一系列温敏性超支化聚合物,并主要选取第三代聚合物HPG-33采用振荡法研究了其淋洗修复重金属污染底泥的影响.结果表明,重金属去除率和聚合物分子量呈正相关关系,浓度在15mmol/L,固液比为1:10、淋洗时间为4h、pH为4时,Cd、Cu、Pb的去除率分别可达到76.33%、86.72%和49.86%,且制备的聚合物淋洗剂不会破坏底泥的酸碱度、团聚结构、内部矿物晶格等.Hyperbranched polyglycidyl glycerin was synthesized with trimethylopropane as core and glycidyl as polymeric monomer,and then n-caprylic acid was added for surface modification to obtain a series of thermosensitive hyperbranched polymers.The third generation polymer HPG-33 was selected to study its effect on the remediation of heavy metal contaminated sludge by oscillating method.The results showed that the removal rate of heavy metals was positively correlated with the molecular weight of the polymer.When the concentration was 15mmol/L,the solid-liquid ratio was 1:10,the leaching time was 4h,and the pH was 4,the removal rates of Cd,Cu and Pb could reach 76.33%,86.72% and 49.86%,respectively.And the prepared polymer eluent will not destroy the pH,agglomerate structure,internal mineral lattice and so on.

关 键 词：底泥 重金属 淋洗 温敏性 超支化聚合物 

分 类 号：X502[环境科学与工程—环境工程]