title: Heavy metals in food, house dust, and water from an e-waste recycling area in South China and the potential risk to human health.
abstract: Concentrations of heavy metals (Cd, Pb, Cu, Zn, and Ni) were measured in the foodstuffs, house dust, underground/drinking water, and soil from an electronic waste (e-waste) area in South China. Elevated concentrations of these potentially toxic metals were observed in the samples but not in drinking water. The health risks for metal exposure via food consumption, dust ingestion, and drinking water were evaluated for local residents. For the average residents in the e-waste area, the non-carcinogenic risks arise predominantly from rice (hazard index=3.3), vegetables (2.2), and house dust (1.9) for adults, while the risks for young children are dominated by house dust (15). Drinking water may provide a negligible contribution to risk. However, local residents who use groundwater as a water supply source are at high non-carcinogenic risk. The potential cancer risks from oral intake of Pb are 8×10(-5) and 3×10(-4) for average adults and children, and thus groundwater would have a great potential to induce cancer (5×10(-4) and 1×10(-3)) in a highly exposed population. The results also reveal that the risk from oral exposure is much higher than the risk from inhalation and dermal contact with house dust.
authors.affiliation: Center for Environmental Health Research, South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Zheng
authors.forename: Ke-hui
authors.initials: KH
authors.lastname: Chen
authors.forename: Xiao
authors.initials: X
authors.lastname: Yan
authors.forename: She-Jun
authors.initials: SJ
authors.lastname: Chen
authors.forename: Guo-Cheng
authors.initials: GC
authors.lastname: Hu
authors.forename: Xiao-Wu
authors.initials: XW
authors.lastname: Peng
authors.forename: Jian-gang
authors.initials: JG
authors.lastname: Yuan
authors.forename: Bi-Xian
authors.initials: BX
authors.lastname: Mai
authors.forename: Zhong-Yi
authors.initials: ZY
authors.lastname: Yang
mesh_terms: D000328:Adult; D002648:Child; D002681:China; D004391:Dust / Q000032:analysis*; D059029:Electronic Waste / Q000032:analysis*; D004784:Environmental Monitoring; D004785:Environmental Pollutants / Q000032:analysis*; D005506:Food Contamination / Q000032:analysis*; D006801:Humans; D019216:Metals, Heavy / Q000032:analysis*; D012275:Oryza / Q000737:chemistry; D059027:Recycling / Q000592:standards; D018570:Risk Assessment; D012987:Soil / Q000737:chemistry; D014675:Vegetables / Q000737:chemistry; D014867:Water / Q000737:chemistry*; D014881:Water Supply / Q000032:analysis
chemical_list: D004391:Dust; D004785:Environmental Pollutants; D019216:Metals, Heavy; D012987:Soil; D014867:Water
keywords: Exposure assessment; Heavy metals; Risk; e-waste