Hosoda Junki, Ofosu-Anim John, Sabi Edward Benjamin, Akita Lailah Gifty, Onwona-Agyeman Siaw, Yamashita Rei, Takada Hideshige
Laboratory of Organic Geochemistry (LOG), Tokyo University of Agriculture and Technology, Fuchu, Tokyo 183-8509, Japan.
University of Ghana, Legon, Ghana.
Mar Pollut Bull. 2014 Sep 15;86(1-2):575-581. doi: 10.1016/j.marpolbul.2014.06.008. Epub 2014 Jul 3.
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.
对加纳整个海岸线11个海滩收集的塑料树脂颗粒进行了多氯联苯（PCBs）分析。首都阿克拉和特马的多氯联苯浓度（13种同系物总和）（39 - 69纳克/克颗粒）高于靠近全球背景值的沿海农村城镇（1 - 15纳克/克颗粒），表明多氯联苯存在本地输入。还对河流沉积物进行了多氯联苯以及分子标志物分析。电子垃圾（电子废弃物）拆解场下游的一个地点（AR02）沉积物中的多氯联苯浓度最高。在该地点（AR02），作为城市污水标志物的直链烷基苯（LABs）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，电子垃圾场向河流中输入的多氯联苯更多。在具有强烈成岩特征的城市地区，多环芳烃（PAHs）浓度相对较高。三苯苯的丰度表明电子垃圾拆解场附近存在塑料燃烧现象。
