Monitoring of organic micropollutants in Ghana by combination of pellet watch with sediment analysis: e-waste as a source of PCBs.
Monitoring of organic micropollutants in Ghana by combination of pellet watch with sediment analysis: e-waste as a source of PCBs.
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DOI：
10.1016/j.marpolbul.2014.06.008
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发表时间：
2014-09
影响因子：
5.8
通讯作者：
J. Hosoda;J. Ofosu-Anim;E. Sabi;L. G. Akita;S. Onwona-Agyeman;Rei Yamashita;H. Takada
中科院分区：
文献类型：
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作者：
J. Hosoda;J. Ofosu-Anim;E. Sabi;L. G. Akita;S. Onwona-Agyeman;Rei Yamashita;H. Takada
对覆盖整个加纳海岸线的 11 个海滩收集的塑料树脂颗粒进行了多氯联苯 (PCB) 分析。首都阿克拉和特马的 PCB 浓度（Σ13 同系物）（39-69 ng/g-颗粒）高于沿海农村城镇（1-15 ng/g-颗粒），接近全球背景，表明 PCB 的本地输入。还对河流沉积物中的多氯联苯和分子标记进行了分析。电子废物（e-waste）废料场下游的一个地点（AR02）沉积物 PCB 浓度最高。在该地点（AR02），城市废水标志物直链烷基苯（LAB）的浓度低于位于阿克拉市中心下游的另一个地点（AR03）。这一结果表明，与阿克拉市中心的活动相比，电子废物场向河流中引入的多氯联苯更多。在具有较强成岩特征的城市地区，多环芳烃浓度相对较高。大量的三苯苯表明电子废物废料场附近有塑料燃烧。
Plastic resin pellets collected at 11 beaches covering the whole Ghanaian coastline were analyzed for polychlorinated biphenyls (PCBs). PCB concentrations (∑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.