聚酰胺微塑料吸附水环境中对氯间二甲苯酚和卡马西平的行为研究
Study on the adsorption behavior of p-chloro-m-xylenol and carbamazepine in water environment by polyamide microplastics
姜清荣 1高梦婕 1蔡园 1王梦瑶 1肖耀东 1薛婷丹 1胡纯1
作者信息
- 1. 武汉轻工大学化学与环境工程学院,武汉 430023
- 折叠
摘要
为了评估微塑料对有机污染物的载体效应,以聚酰胺(PA)微塑料为研究对象,考察其在水环境中对对氯间二甲苯酚(PCMX)和卡马西平(CBZ)的吸附行为.结果表明:准二级动力学模型和Freundlich模型对PA微塑料的吸附过程具有更好的拟合效果,说明整个吸附过程是为非均匀表面多层吸附,同时涉及颗粒内扩散、疏水分配作用多阶段共同作用;不同的pH值和盐度会影响静电作用或离子交换程度,使吸附效率发生改变.该研究可为微塑料作为载体迁移有机物污染物提供理论依据.
Abstract
In order to evaluate the carrier effect of microplastics on organic pollutants,the adsorption behav-ior of p-chloro-m-xylenol(PCMX)and carbamazepine(CBZ)on polyamide(PA)microplastics in water environment was investigated.The results show that the adsorption process of PA microplastics was accu-rately comepleted by the Freundlich and pseudo-second-order kinetic theories,indicating that the whole ad-sorption process is a multi-layer adsorption of heterogeneous surface dominated by chemical adsorption,and involves the multi-stage interaction of intra-particle diffusion and hydrophobic distribution.Different pH and salinity will affect the degree of electrostatic interaction or ion exchange,which will change the adsorp-tion efficiency.This study can provide a theoretical basis for microplastics as carriers to migrate organic pollutants.
关键词
微塑料/氯间二甲苯酚/卡马西平/吸附Key words
microplastics/para-chloro-meta-xylenol/carbamazepine/adsorption引用本文复制引用
出版年
2024
NETL
NSTL
万方数据