Partitioning of selected hydrophobic organic chemicals between microplastics and seawater

Title
Partitioning of selected hydrophobic organic chemicals between microplastics and seawater
Author(s)
이황; 심원준; 권정환
KIOST Author(s)
Shim, Won Joon(심원준)
Publication Year
2014-06-30
Abstract
The occurrence of microplastics (MPs) in the ocean is an emerging world-wide concern. Although sorption of hydrophobic organic contaminants (HOCs) to microplastics may play an important role in the transport processes of HOCs, quantitative evaluation of sorption capacities of various plastic materials is scarce. Most of earlier studies focused on sorption of HOCs to passive sampling material such as low-density polyethylene. In this study, we measured partition coefficients between MPs and seawater (KMPsw) for 8 polycyclic aromatic hydrocarbons (PAHs), 4 hexachlorocyclohexanes (HCHs) and 2 chlorinated benzenes (CBs). Three different polymer materials (i.e., polyethylene, polypropylene, and polystyrene) were chosen because they are the major components of microplastic debris found in the ocean. A third-phase partitioning method was used for the reliable determination of KMPsw to avoid problems with the limited solubility of HOCs in seawater and long equilibration time. First, partition coefficients between polydimethylsiloxane (PDMS) and seawater (KPDMSsw) weremeasured. For the determination of KMPsw, 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. Laboratory prepared plastic debris (320-440 ?m in thelongest dimension) was prepared by physical crushing. Partition coefficients between polyethylene and seawaterevaluation of sorption capacities of various plastic materials is scarce. Most of earlier studies focused on sorption of HOCs to passive sampling material such as low-density polyethylene. In this study, we measured partition coefficients between MPs and seawater (KMPsw) for 8 polycyclic aromatic hydrocarbons (PAHs), 4 hexachlorocyclohexanes (HCHs) and 2 chlorinated benzenes (CBs). Three different polymer materials (i.e., polyethylene, polypropylene, and polystyrene) were chosen because they are the major components of microplastic debris found in the ocean. A third-phase partitioning method was used for the reliable determination of KMPsw to avoid problems with the limited solubility of HOCs in seawater and long equilibration time. First, partition coefficients between polydimethylsiloxane (PDMS) and seawater (KPDMSsw) weremeasured. For the determination of KMPsw, 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. Laboratory prepared plastic debris (320-440 ?m in thelongest dimension) was prepared by physical crushing. Partition coefficients between polyethylene and seawater
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/26109
Bibliographic Citation
SETAC Euro 2014 Annual Meeting, pp.287, 2014
Publisher
SETAC
Type
Conference
Language
English
Publisher
SETAC
Related Researcher
Research Interests

Microplastic pollution,Persistent Organic Pollutants,Oil Pollution,미세플라스틱 오염,잔류성 유기오염물질,유류오염

Files in This Item:
There are no files associated with this item.

qrcode

Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse