University of Oviedo, Department of Functional Biology, Faculty of Medicine, C/Julian Claveria s/n, 33006 Oviedo, Spain.
Spanish National Distance-Learning University (UNED), Gijón Campus, Avda. Jardin Botanico 1345, 33203 Gijón, Spain.
Mar Pollut Bull. 2022 Feb;175:113162. doi: 10.1016/j.marpolbul.2021.113162. Epub 2021 Nov 25.
Electronic waste sites are rich in heavy metals contained in electronic and electric equipment waste and pose a risk of pollution if metals enter in the environment nearby. The Korle lagoon, located in the center of Accra, is receiving waste effluents from industries, households and the adjacent e-waste burning site Agbogbloshie which is the biggest in the country. Thus, the risk of heavy metal contamination of the water body and subsequent uptake in the aquatic food chain is particularly relevant. Small-scale fishing, not entering the commercial chain, occurs in the lagoon despite its consideration of biologically dead. We assessed if the exposure to heavy metals through these fish consumption is posing higher health risks than fish sold on Ghanaian markets. Using ICP-MS technology, we quantified concentrations of As, Cd, Co, Cr, Cu, Hg, Ni, Pb and Zn in fish caught from the Korle Lagoon (Trachinotus ovatus, Mugil curema and Mugil cephalus) and compared them to fish from the Tema Newtown fishing market (Scomber colias, Pseudotolithus senegallus). Cobalt and lead concentrations, typical e-waste metals, were higher in fish from the Korle lagoon, even though they were of lower trophic level. Calculated risk indices revealed risk of elevated arsenic and mercury exposure, particularly through T. ovatus from the Korle lagoon, if consumed daily as it is common in the region. This study suggests the need of monitoring programs of Ghanaian catch, with a special focus in environmental risk areas like Korle lagoon to ensure human food safety.
电子废物场富含电子和电气设备废物中的重金属，如果金属进入附近环境，就会有污染的风险。科勒泻湖位于阿克拉市中心，接收着来自工业、家庭和毗邻的阿博布罗西电子垃圾燃烧场的废水。阿博布罗西是该国最大的电子垃圾燃烧场。因此，水体受到重金属污染并随后被水生食物链吸收的风险特别相关。尽管泻湖被认为是生物死亡的，但仍有小规模的捕鱼活动，这些鱼没有进入商业链。我们评估了通过食用这些鱼类摄入重金属是否比在加纳市场上销售的鱼类对健康构成更高的风险。我们使用 ICP-MS 技术，定量分析了从科勒泻湖（鲷鱼、鲻鱼和梭鱼）中捕获的鱼类以及从特马新城鱼市（鲐鱼和拟鲹）中捕获的鱼类中的砷、镉、钴、铬、铜、汞、镍、铅和锌的浓度。科勒泻湖的鱼中含有较高浓度的钴和铅，即使它们处于较低的营养级，这两种金属都是典型的电子废物金属。计算出的风险指数显示，由于在该地区很常见，如果每天食用，来自科勒泻湖的鲷鱼会有砷和汞暴露风险升高的风险。这项研究表明，加纳捕捞物需要进行监测计划，特别是在科勒泻湖等环境风险地区，以确保人类食品安全。
