摘要
以膨润土作为原料,采用FeCl_(2)·4H_(2)O和FeCl_(3)·6H_(2)O作为磁改性剂,聚乙烯亚胺作为有机改性剂制备一种新型吸附剂PMB(有机磁改性膨润土),用于吸附水中纳米塑料。结果表明:SEM(扫描电镜)分析、FT-IR(傅里叶红外)光谱、XRD(X射线衍射仪)、Zeta电位、XPS(X射线能谱)表征显示,PMB与PS-NPs(聚苯乙烯纳米塑料)之间存在明显静电吸引和表面络合作用。磁性分析表明该吸附剂具有优良的超顺磁性,满足磁分离要求。PS-NPs在PMB上的吸附过程符合拟二级动力学方程和Sips等温吸附模型,化学吸附主导吸附过程。为吸附水体中纳米塑料提供了一种新方法。
A novel adsorbent PMB(organomagnetic modified bentonite)was prepared from bentonite as raw material using FeCl_(2)·4H_(2)O and FeCl_(3)·6H_(2)O as magnetic modifiers and polyethylene imine as organic modifier for adsorption of nanoplastics in water.The results show that SEM(scanning electron microscopy)analysis,FT-IR(Fourier transform infrared)spectroscopy,XRD(X-ray diffractometer),Zeta potential,and XPS(X-ray spectroscopy)characterisation indicate significant electrostatic attraction and surface complexation between PMB and PS-NPs(polystyrene nanoplastics).Magnetic analysis shows that the adsorbent has excellent superparamagnetism and meets the requirement of magnetic separation.The adsorption process of PS-NPs on PMB conforms to the proposed second-order kinetic equation and Sips isothermal adsorption model,and chemisorption dominates the adsorption process.A new method is provided for the adsorption of nanoplastics in water.
作者
马俐琪
沈俊杰
韩枫
刘思雨
李政
常可心
杨佳猛
MA Liqi;SHEN Junjie;HAN Feng;LIU Siyu;LI Zheng;CHANG Kexin;YANG Jiameng(School of Water and Environment,Chang′an University,Xi′an 710054,Shaanxi Province,China;Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region Ministry of Education,Chang′an University,Xi′an 710054,Shaanxi Province,China;Key Laboratory of Eco-Hydrology and Water Security in Arid Region Ministry of Water Resources,Chang′an University,Xi′an 710054,Shaanxi Province,China)
出处
《化学工程》
北大核心
2025年第11期1-6,12,共7页
Chemical Engineering(China)
基金
陕西省科技计划项目重点研发计划项目(2020SF-422)。
关键词
磁性
聚乙烯亚胺
膨润土
吸附
纳米塑料
magnetic
polyethyleneimine
magnetic bentonite
adsorption
nanoplastics
作者简介
马俐琪(1998-),硕士,研究方向为环境化学,E-mail:18322075825@163.com;通信联系人:韩枫(1979-),副教授,硕士生导师,研究方向为环境化学,E-mail:40759150@qq.com。
