期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 752, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2020.141837
关键词
Microplastics; Coagulation; Removal performance; Mechanism
资金
- Innovation Spark Project of Sichuan University [2019SCUH0009]
- National Key Research and Development Program of China [2016YFC0401710]
- Science and Technology Foundation of Sichuan Province of China [2018SZ0292]
This study investigated the removal performance of PS and PE microplastics using PAC and FeCl3 coagulants. Results showed that PAC was more effective than FeCl3, especially in alkaline conditions. Adsorption and complexation were the main removal mechanisms, with the formation of new bonds enhancing the efficiency.
As a new type of potentially threatening pollutant, microplastics are widely distributed in water and may come into contact with the humans through tap water. The removal behaviors of microplastics in water treatment plants coagulation are not completely clear. In this paper, the removal performance and mechanism of polystyrene (PS) and polyethylene (PE) microplastics using PAC and FeCl3 coagulation were studied. Results showed that PAC was better than FeCl3 in removal efficiency of PS and PE microplastics. Charge neutralization occurred in the coagulation process. The figures of scanning electron microscope (SEM) illustrate that agglomeration adsorption occurred in PS system, and the Fourier transforminfrared spectroscope (FTIR) spectra demonstrates that newbonds were formed during the interaction between PS microplastics and coagulants. In addition, the hydrolysis products of coagulants played amajor role rather than the hydrolysis process in both PS system and PE system. The removal efficiency of microplastics in alkaline conditions was higher than that in acidic conditions. Cl- had little effect on the removal efficiency of microplastics, while SO42- and CO32 had inhibitory and promoting effects respectively. The increase of stirring speed could improve the removal efficiency of microplastics. This paper can provide a reference for the study of microplastics treated by coagulation. (C) 2020 Elsevier B.V. All rights reserved.
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