Sorption capacity of plastic debris for hydrophobic organic chemicals SCIE SCOPUS

Cited 303 time in WEB OF SCIENCE Cited 325 time in Scopus
Title
Sorption capacity of plastic debris for hydrophobic organic chemicals
Author(s)
Lee, Hwang; Shim, Won Joon; Kwon, Jung-Hwan
KIOST Author(s)
Shim, Won Joon(심원준)
Publication Year
2014-02-01
Abstract
The occurrence of microplastics (MPs) in the ocean is an emerging world-wide concern. Due to high sorption capacity of plastics for hydrophobic organic chemicals (HOCs), sorption may play an important role in the transport processes of HOCs. However, sorption capacity of various plastic materials is rarely documented except in the case of those used for environmental sampling purposes. In this study, we measured partition coefficients between MPs and seawater (K-MPsw) for 8 polycyclic aromatic hydrocarbons (PAHs), 4 hexachlorocyclohexanes (HCHs) and 2 chlorinated benzenes (CBs). Three surrogate polymers - polyethylene, polypropylene, and polystyrene - were used as model plastic debris because they are the major components of microplastic debris found. Due to the limited solubility of HOCs in seawater and their long equilibration time, a third-phase partitioning method was used for the determination of K-MPsw. First, partition coefficients between polydimethylsiloxane (PDMS) and seawater (K-PDMSsw) were measured. For the determination of K-MPsw, the distribution of HOCs between PDMS or plastics and solvent mixture (methanol:water = 8:2 (v/v)) was determined after apparent equilibrium up to 12 weeks. Plastic debris was prepared in a laboratory by physical crushing; the median longest dimension was 320-440 mu m. Partition coefficients between polyethylene and seawater obtained using the third-phase equilibrium method agreed well with experimental partition coefficients between low-density polyethylene and water in the literature. The values of K-MPsw were generally in the order of polystyrene, polyethylene, and polypropylene for most of the chemicals tested. The ranges of log K-MPsw were 2.04-7.87, 2.18-7.00, and 2.63-7.52 for polyethylene, polypropylene, and polystyrene, respectively. The partition coefficients of plastic debris can be as high as other frequently used partition coefficients, such as 1-octanol-water partition coefficients (K-ow) and log K-MPsw showed good linear correlations with log K-ow. High sorption capacity of microplastics implies the importance of MP-associated transport of HOCs in the marine environment. (C) 2013 Elsevier B.V. All rights reserved.
ISSN
0048-9697
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/2864
DOI
10.1016/j.scitotenv.2013.08.023
Bibliographic Citation
SCIENCE OF THE TOTAL ENVIRONMENT, v.470, pp.1545 - 1552, 2014
Publisher
ELSEVIER SCIENCE BV
Subject
SOLID-PHASE MICROEXTRACTION; POLYCYCLIC AROMATIC-HYDROCARBONS; DETERMINE PARTITION-COEFFICIENTS; SEMIPERMEABLE-MEMBRANE DEVICES; POLYCHLORINATED-BIPHENYLS; MARINE-ENVIRONMENT; DISTRIBUTION CONSTANTS; SYNTHETIC-POLYMERS; PASSIVE SAMPLERS; WATER
Keywords
Microplastics; New POPs; Marine pollution; Equilibrium partitioning; Nanomaterial; QSARs
Type
Article
Language
English
Document Type
Article; Proceedings Paper
Publisher
ELSEVIER SCIENCE BV
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