Sorption behavior of real microplastics (MPs): Insights for organic micropollutants adsorption on a large set of well-characterized MPs

被引：127

作者：

Ateia, Mohamed ^{[1
,2
]}

Zheng, Ting ^{[3
,4
]}

Calace, Stefania ^{[1
,5
]}

Tharayil, Nishanth ^{[6
]}

Pilla, Srikanth ^{[3
,4
,7
,8
]}

Karanfil, Tanju ^{[1
]}

机构：

[1] Clemson Univ, Dept Environm Engn & Earth Sci, Clemson, SC 29631 USA

[2] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA

[3] Clemson Univ, Dept Automot Engn, Clemson, SC 29631 USA

[4] Clemson Univ, Clemson Composites Ctr, Clemson, SC 29631 USA

[5] Univ Basilicata, Scuola Ingn, Viale Ateneo Lucano 10, Potenza, Italy

[6] Clemson Univ, Dept Plant & Environm Sci, Clemson, SC 29634 USA

[7] Clemson Univ, Dept Mat Sci & Engn, Clemson, SC 29634 USA

[8] Clemson Univ, Dept Mech Engn, Clemson, SC 29634 USA

来源：

SCIENCE OF THE TOTAL ENVIRONMENT | 2020年 / 720卷

基金：

美国食品与农业研究所;

关键词：

Microplastics; Adsorption; Additives; Micropollutants; PFAS; NOM preloading; MARINE-ENVIRONMENT; ATRAZINE; POLYETHYLENE; NANOPLASTICS; EXPOSURE; MATTER; SOILS; WATER; PFOA;

D O I：

10.1016/j.scitotenv.2020.137634

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Microplastics (MPs) have been recognized as transport vectors for micropollutants in the natural water environment and the food web; therefore, the sorption behavior of contaminant on MPs has recently gained an increased attention. However, a consensus has not yet been reached and information about the adsorption of water contaminants on real MPs remains elusive. Herein, we raise the question of "Should we continue using pure polymers as surrogates for real MPs?" This first systematic study compared the adsorption of multiple micropollutants (i.e. a pesticide, a pharmaceutical, and perfluoroalkyl substances (PFAS)) on a large set of MPs (i.e. 20 well-characterized MPs) and kaolin. Material characterizations results showed various physicochemical and compositional differences between real and pure MPs. Pure polymers had lower normalized uptake values than real MPs in most cases. This was attributed to the surface roughness and/or the presence of fillers (e.g. talc and glass fiber) in real samples. Further, preloaded MPs with natural organic matter (NOM) showed an increased uptake of micropollutants due to forming a complex with NOM and/or co-sorption. These findings indicate that employing real MPs in research studies is critical for obtaining environmentally meaningful results, and the evaluation of MPs sorption behavior without NOM preloading can result in a significant underestimation for their actual values. We also provided an outlook the key areas for further investigations. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：7