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.
出处
《安全与环境工程》
CAS
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)
