Monitoring of organic micropollutants in Ghana by combination of pellet watch with sediment analysis: E-waste as a source of PCBs

作者：Hosoda Junki; Ofosu Anim John; Sabi Edward Benjamin; Akita Lailah Gifty; Onwona Agyeman Siaw; Yamashita Rei; Takada Hideshige^*

来源：Marine Pollution Bulletin, 2014, 86(1-2): 575-581.

DOI：10.1016/j.marpolbul.2014.06.008

• PCBs
• Pellet watch
• Electronic waste
• Molecular markers
• Triphenylbenzene
• Linear alkylbenzenes

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.

• 出版日期2014-9-15