Persistent organic pollutant and sterol distributions in the offshore East China Sea influenced by the low salinity water mass

Title
Persistent organic pollutant and sterol distributions in the offshore East China Sea influenced by the low salinity water mass
Author(s)
김문구; 하성용; 한기명; 최동림; 심원준
KIOST Author(s)
Kim, Moonkoo(김문구)Ha, Sung Yong(하성용)Han, Gi Myung(한기명)Shim, Won Joon(심원준)
Publication Year
2015-11-02
Abstract
Surface seawater was analyzed for organochlorine compounds, polycyclic aromatic hydrocarbons (PAHs), and sterols in the offshore (approximately 250 km from the shore) East China Sea influenced by low salinity water masses. The spatial distribution and molecular composition of the target chemicals were investigated to identify the origin of the low salinity water mass and the organic chemicals. ΣDDTs and ΣPCBs in suspended particulate matter (SPM) were ranging from 3.3 to 39 and from 20 to 68 pg/L respectively. ΣPAHs were ranged from 3.0 to 33.6 ng/L with an average of 12.3 ng/L. PAHs, DDTs and Chlordane were relatively higher in the less-saline water masses, suggesting the influx of the organic contaminants into the northern East China Sea by the low salinity water mass. ΣSterol concentrations ranged from 3.2 to 31.9 ng/L in the SPM. Although marine sterols dominated with 71% in the overall sterol composition, molecular signatures of allochthonous terrestrial plants were still visible and there was a relationship between the low salinity water mass in the East China Sea and the terrestrial sterols. Considering the proximity of the Yangtze River and the presence of the Changjiang River Diluted Water (CRDW) in the study area, it was probable that these chemicals were transported for long-distance from the Yangtze River runoff by the CRDW. The compositional similarity of PAHs in the less-saline water masses with thoibution and molecular composition of the target chemicals were investigated to identify the origin of the low salinity water mass and the organic chemicals. ΣDDTs and ΣPCBs in suspended particulate matter (SPM) were ranging from 3.3 to 39 and from 20 to 68 pg/L respectively. ΣPAHs were ranged from 3.0 to 33.6 ng/L with an average of 12.3 ng/L. PAHs, DDTs and Chlordane were relatively higher in the less-saline water masses, suggesting the influx of the organic contaminants into the northern East China Sea by the low salinity water mass. ΣSterol concentrations ranged from 3.2 to 31.9 ng/L in the SPM. Although marine sterols dominated with 71% in the overall sterol composition, molecular signatures of allochthonous terrestrial plants were still visible and there was a relationship between the low salinity water mass in the East China Sea and the terrestrial sterols. Considering the proximity of the Yangtze River and the presence of the Changjiang River Diluted Water (CRDW) in the study area, it was probable that these chemicals were transported for long-distance from the Yangtze River runoff by the CRDW. The compositional similarity of PAHs in the less-saline water masses with tho
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/25177
Bibliographic Citation
SETAC North America 36th Annual Meeting, pp.253, 2015
Publisher
Society of Environmental Toxicology and Chemistry
Type
Conference
Language
English
Publisher
Society of Environmental Toxicology and Chemistry
Related Researcher
Research Interests

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

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