PEI纳米交联树脂对Pb(Ⅱ)和磺胺二甲嘧啶的吸附  

Adsorption Performances of Pb(Ⅱ) and Sulfamethazine by Polyethyleneimine Nano Crosslinked Resin

作　　者：杨其文[1] 王圃[1] 雷燕 YANG Qi-wen;WANG Pu;LEI Yan(College of Environment and Ecology,Chongqing University,Chongqing 400030,China;School of Materials and Environmental Engineering,Chengdu Technological University,Chengdu 611730,China)

机构地区：[1]重庆大学环境与生态学院,重庆400030 [2]成都工业学院材料与环境工程学院,四川成都611730

出　　处：《中国给水排水》2022年第17期93-99,共7页China Water & Wastewater

基　　金：成都工业学院人才引进项目(2021RC004);教育部春晖计划项目(Z2015140)。

摘　　要：通过超声辅助浸渍方式将聚乙烯亚胺(PEI)纳米颗粒成功负载到磺酸基修饰的超高交联树脂上,制备了H-01-PEI纳米复合超高交联树脂,并研究该树脂对Pb(Ⅱ)和磺胺二甲嘧啶(SZ)的吸附性能。Langmuir和Freundlich模型都适合模拟Pb(Ⅱ)的吸附过程,共存的SZ可以增强H-01-PEI树脂对Pb(Ⅱ)的吸附作用,但随着SZ浓度的增大,这种增强作用逐渐减弱。H-01-PEI树脂对SZ的吸附更符合Langmuir模型。在复合体系中,共存Pb(Ⅱ)的浓度会影响H-01-PEI树脂对SZ的吸附,低浓度时有微弱增强作用而高浓度时具有抑制作用。在实际水体中磺胺类抗生素往往以痕量级存在,这种低浓度抗生素的共存可增强H-01-PEI树脂对Pb(Ⅱ)的吸附,所以H-01-PEI纳米吸附树脂能够实现对Pb(Ⅱ)和SZ的同时去除。Polyethyleneimine(PEI)nanoparticles were loaded onto sulfonic acid groups modified hyper-crosslinked resin by ultrasonic assisted impregnation to prepare H-01-PEI resin,and its adsorption performance of Pb(Ⅱ)and sulfamethazine(SZ)was investigated.Both Langmuir and Freundlich models were suitable for fitting the adsorption process of Pb(Ⅱ).The co-existing SZ enhanced the adsorption of Pb(Ⅱ)by H-01-PEI resin.However,this enhancement effect gradually decreased with the increase of SZ concentration.Langmuir model was more suitable for fitting the adsorption of SZ by H-01-PEI resin.In the composite system,the concentration of co-existing Pb(Ⅱ)affected the adsorption of SZ by H-01-PEI resin,which had a weak enhancement effect at low concentration and an inhibition effect at high concentration.Sulfonamide antibiotics often exist in trace amounts in actual water,and the coexistence of such low concentration of antibiotics could enhance the adsorption of Pb(Ⅱ)by H-01-PEI resin.Therefore,H-01-PEI resin is capable of achieving the simultaneous removal of Pb(Ⅱ)and SZ.

关 键 词：聚乙烯亚胺(PEI) 超高交联树脂 Pb(Ⅱ) 磺胺二甲嘧啶 共吸附 

分 类 号：TU992[建筑科学—市政工程]