聚醚砜-改性海泡石杂化微球对环境毒素溴化乙锭和双酚A的吸附研究  

Study on the Adsorption of Environmental Toxins Ethidium Bromide and Bisphenol A by Polyethersulfone/Modified Sepiolite Hybrid Particles

作　　者：杨庆国 张高峰 程冲[2] 曹雪莲[2] 赵长生[2] 

机构地区：[1]川渝中烟技术研发中心,成都610051 [2]四川大学高分子科学与工程学院高分子国家重点实验室,成都610065

出　　处：《安全与环境工程》2011年第2期28-35,44,共9页Safety and Environmental Engineering

基　　金：国家自然科学基金项目(50673064;50973070);四川省青年科技基金项目(08ZQ026-038)

摘　　要：本文将经过酸热处理的海泡石(AH-SEP)和有机改性处理的海泡石(OAH-SEP)共混入聚醚砜(PES)溶液制备杂化微球,并用于环境毒素的吸附试验研究,结果表明:PES/AH-SEP对离子型环境毒素吸附效果较好,而PES/OAH-SEP对非离子型环境毒素吸附效果较好;依据PES/AH-SEP吸附EB及PES/OAH-SEP吸附BPA的动力学和吸附等温式,经拟合,PES/AH-SEP吸附EB是单分子层吸附,吸附初期为大孔隙扩散,后期为粒子内扩散,而PES/OAH-SEP吸附BPA是表面不均匀吸附,吸附初期为粒子边界层扩散,后期为粒子内扩散。In this study,sepiolite（SEP） was modified by acid and heat treatment（AH-SEP） and organic treatment（OAH-SEP）.Polyethersulfone（PES）/AH-SEP and PES/OAH-SEP hybrid particles were prepared for the removal of environmental toxins.The results indicated that PES/AH-SEP hybrid particles had good adsorbability for the ionic toxins（EB）,while PES/OAH-SEP hybrid particles were more suitable for adsorbing nonionic toxins（BPA）.In addition,kinetic models and adsorption isotherms were tested for EB and BPA adsorption processes,respectively.It was found that EB adsorption was a monolayer adsorption and the diffusion in macro-pores was significant for the initial period.However,BPA adsorption was a heterogeneous system and reversible adsorption,and boundary layer diffusion was dominant at the beginning of adsorption.But for both adsorptions,intraparticle diffusion controlled the adsorption rate at the final stage.

关 键 词：聚醚砜(PES) 改性海泡石 杂化微球 环境毒素 吸附作用 

分 类 号：X5[环境科学与工程—环境工程] X503