Bioaccessibility and human health risk assessment of metal(loid)s in soil from an e-waste open burning site in Agbogbloshie, Accra, Ghana
Bioaccessibility and human health risk assessment of metal(loid)s in soil from an e-waste open burning site in Agbogbloshie, Accra, Ghana
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DOI：
10.1016/j.chemosphere.2019.124909
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发表时间：
2020-02-01
期刊：
影响因子：
8.8
通讯作者：
Oshita, Kazuyuki
中科院分区：
文献类型：
--
作者：
Cao, Peiqing;Fujimori, Takashi;Oshita, Kazuyuki
据报道，一些地点不受限制的电子废物(电子废物)回收活动造成环境污染和人类健康问题。在不同的电子垃圾回收技术中，露天焚烧电子垃圾向环境中释放出多种金属(固体)S，引起了全世界的关注。在人类健康风险评估(HHRA)中，口腔摄入土壤可能是接触许多固定土壤污染物的主要途径。目前正在开发和验证体外分析方法，以避免在计算HHRA中的总污染物浓度时高估人体吸收的污染物。本研究对加纳阿克拉阿博布洛西电子垃圾露天焚烧场污染土壤(n=10)中的铜、砷、镉、锑和铅的生物可获得性进行了体外测定，即生理学提取试验。然后进行了生物可及性校正的HHRA，以评估对当地居民的潜在健康风险。不同金属(Loid)S(Cu1.3-60，As：1.3-40，Cd：4.2-67，Sb：0.7-85，Pb4.1-57)的体外结果(%)差异很大，胃期和小肠期也有显著差异。土壤样品的粒度和金属(类)的化学形态S也影响生物可及性值。利用这些生物可及性值，计算了危险指数和致癌风险。有5/10个样本的危害指数超过阈值(>；1)，表明对当地居民存在潜在的健康风险。(C)2019爱思唯尔有限公司。保留所有权利。
Environmental pollution and human health issues due to unrestricted electronic waste (e-waste) recycling activities have been reported at a number of locations. Among different e-waste recycling techniques, open burning of e-waste releases diverse metal(loid)s into the environment, which has aroused concern worldwide. In human health risk assessments (HHRAs), oral ingestion of soil can be a major route of exposure to many immobile soil contaminants. In vitro assays are currently being developed and validated to avoid overestimation of pollutants absorbed by the human body when calculating total pollutant concentrations in HHRAs. In this study, Cu, As, Cd, Sb, and Pb bioaccessibility in polluted soils (n =10) from e-waste open burning sites at Agbogbloshie in Accra, Ghana, was assessed using an in vitro assay, the physiologically based extraction test. A bioaccessibility-corrected HHRA was then conducted to estimate the potential health risks to local inhabitants. The in vitro results (%) varied greatly among the different metal(loid)s (Cu: 1.3-60, As: 1.3-40, Cd: 4.2-67, Sb: 0.7-85, Pb: 4.1-57), and also showed marked variance between the gastric phase and small intestinal phase. The particle sizes of soil samples and chemical forms of metal(loid)s also influenced bioaccessibility values. Using these bioaccessibility values, both the hazard index and carcinogenic risk were calculated. The hazard index was above the threshold value (>1) for 5/10 samples, indicating a potential health risk to local inhabitants. (C) 2019 Elsevier Ltd. All rights reserved.