聚苯乙烯纳米塑料吸附水中培氟沙星  

Adsorption of pefloxacin from water by polystyrene nanoplastics

作　　者：纪伟 李亚男[1] 张国凯 武亚宁 JI Wei;LI Yanan;ZHANG Guokai;WU Yaning(College of Environmental Science and Engineering,Taiyuan University of Technology,Jinzhong 030600,China;Chinasea Group Co.Ltd.,Taiyuan 030012,China)

机构地区：[1]太原理工大学环境科学与工程学院,山西晋中030600 [2]中海国亚环保工程有限公司,山西太原030012

出　　处：《化工环保》2023年第1期64-71,共8页Environmental Protection of Chemical Industry

基　　金：自然资源部生态地球化学重点实验室开放基金项目(ZSDHJJ201804);山西省基础研究计划项目(20210302123121)。

摘　　要：采用聚苯乙烯纳米塑料(PSNPs)吸附水中培氟沙星(PEF)。通过动力学、热力学和等温模型研究了PSNPs对PEF的吸附行为,考察了溶液pH、Na+、溶解性有机物海藻酸、重金属离子等环境因素对吸附效果的影响。结果表明:吸附动力学曲线符合准二级动力学模型,吸附过程可用Langmuir模型描述;该吸附是自发进行的物理吸附为主导的过程,且只发生单分子层吸附。随着溶液pH的升高,PSNPs的PEF吸附量先增加后降低;在pH=6时达到最大。Na^(+)、溶解性有机物海藻酸、Cu^(2+)和Zn^(2+)均对吸附产生抑制作用,离子交换、竞争吸附、金属桥接效应等是主要原因。Pefloxacin(PEF)in water was adsorbed by polystyrene nanoplastics(PSNPs).The adsorption behavior of PSNPs to PEF was studied by kinetics,thermodynamics and isothermal model,and the effects of environmental factors such as silution pH,Na+,dissolved organic alginic acid and heavy metal ions on the adsorption were investigated.The results show that:the adsorption kinetic curve accords with the pseudo-second-order kinetic model,and the adsorption process can be described by Langmuir model;the adsorption is a spontaneous process dominated by physical adsorption,and only monolayer adsorption occurs.With the increase of solution pH,the PEF adsorption capacity of PSNPs increases at first and then decreases,and reaches the maximum at pH=6.Na+,dissolved organic matter alginic acid,Cu^(2+)and Zn^(2+)all inhibit the adsorption,and ion exchange,mainly due to ion exchange,competitive adsorption,metal bridging effect,etc.

关 键 词：纳米塑料 聚苯乙烯 培氟沙星 吸附 

分 类 号：X703[环境科学与工程—环境工程]