Health risk of heavy metals through oral exposure in different e-waste dismantling plants
不同电子废弃物拆解场重金属经口暴露的健康风险研究

E-waste dismantling plants were surveyed in Taizhou, Zhejiang Province. The pollution in different dismantling plants (a burning plant, a manual dissembling plant and a pickling plant) caused by copper, lead and cadmium and other four kinds of metals were investigated with field survey and laboratory analysis. The health human exposure risk through oral ingestions in different dismantling plants was evaluated with US EPA models. In addition, the exposure parameters were optimized by questionnaires and actual measurement. Results obtained showed that oral exposure levels in the three dismantling plant exceeded the acceptable levels recommended by international organization, with the highest carcinogenic risk of human exposure in the manual dissembling plant and the highest non-carcinogenic risk of human exposure in the burning plant. In terms of the exposure way, the carcinogenic risk caused by food intake was the highest, while the non-carcinogenic risk caused by drinking groundwater was the highest. In terms of the elements, the carcinogenic risk caused by arsenic was the highest, while the non-cancer risk by chromium was the highest. Sensitivity analysis result illustrated that the measured parameters of body weight (BW) showed a negative sensitivity to health risk, which accounted for about 14%~15%, and the concentration of pollutants (C), intake rate (IRw、IRF、IRs) exhibited a positive sensitivity, which accounted for 15%~16% and 15%, respectively.