期刊
MARINE POLLUTION BULLETIN
卷 86, 期 1-2, 页码 575-581出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2014.06.008
关键词
PCBs; Pellet watch; Electronic waste; Molecular markers; Triphenylbenzene; Linear alkylbenzenes
资金
- Mitsui and Co. Ltd.
- Environment Fund [R11-G4-1053]
- Ministry of Education and Culture of Japan [23310046, 22254001]
- graduate education program for Field-oriented leaders in environmental sectors (FOLENS program)
- Grants-in-Aid for Scientific Research [23310046] Funding Source: KAKEN
Plastic resin pellets collected at 11 beaches covering the whole Ghanaian coastline were analyzed for polychlorinated biphenyls (PCBs). PCB concentrations (Sigma 13 congeners) were higher in Accra, capital city, and Tema (39-69 ng/g-pellets) than those in rural coastal towns (1-15 ng/g-pellets) which are close to global background, indicating local inputs of PCBs. River sediments were also analyzed for PCBs together with molecular markers. Sedimentary PCBs concentrations were highest at a site (AR02) downstream of an electronic waste (e-waste) scrapyard. At the site (AR02), concentration of linear alkylbenzenes (LABs), a marker of municipal wastewater, was lower than another site (AR03) which is located at the downstream of downtown Accra. This result suggests that PCBs are introduced more to the river from the e-waste site than from activities in downtown Accra. PAHs concentrations were relatively higher in urban areas with strong petrogenic signature. Abundance of triphenylbenzenes suggested plastic combustion near e-waste scrapyard. (C) 2014 Elsevier Ltd. All rights reserved.
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