期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 264, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2023.115400
关键词
Polyamide 6 microplastic; Sulfonamide antibiotics; Sorption behavior; Gastrointestinal conditions; Desorption mechanisms
This paper systematically investigates the adsorption behavior of Sulfamethoxazole (SMX) on Polyamide 6 (PA6) microplastics and simulates the desorption process under different environmental conditions. The study findings reveal significant effects of environmental conditions and gastrointestinal components on the adsorption and desorption of SMX on PA6 microplastics.
Microplastics (MPs) can enrich pollutants after being released into the environment, and the contaminantsloaded MPs are usually ingested by organisms, resulting in a potential dual biotoxic effect. In this paper, the adsorption behavior of Sulfamethoxazole (SMX) on Polyamide 6 (PA6) MPs was systematically investigated and simulated by the kinetic and isotherm models. The effect of environmental conditions (pH, salinity) on the adsorption process was studied, and the desorption behavior of SMX-loaded PA6 MPs was focused on simulating the seawater, ultrapure water, gastric and intestinal fluids. We found that lower pH and solubilization of SMX by gastrointestinal components (bovine serum albumin (BSA), sodium taurocholate (NaT), and pepsin) can reduce the electrostatic interaction between the surface charge of PA6 MPs and SMX. The result will lead to an increase in the desorption capacity of SMX-loaded PA6 MPs in gastrointestinal fluids and therefore will provide a reasonable mechanism for the desorption of SMX-loaded PA6 MPs in the gastrointestinal fluids. This study will provide a theoretical reference for studying the desorption behavior of SMX-loaded PA6 MPs under gastrointestinal conditions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据