Liu Xingmei, Gu Shunbin, Yang Shiyan, Deng Jinsong, Xu Jianming
College of Environmental and Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China.
College of Environmental and Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China.
Sci Total Environ. 2021 Jul 20;779:146438. doi: 10.1016/j.scitotenv.2021.146438. Epub 2021 Mar 15.
Investigating the farmland quality around electronic waste (E-waste) dismantling site and taking positive measures to ensure local food safety are urgent. Eleven types of vegetables (n = 184) and their corresponding soils were collected from vegetable fields in a city with famous historical e-waste activities in China. Nemerow integrated pollution indices analysis revealed that local vegetable fields suffered from heavy metal pollution to a certain extent, especially with regards to Cd, Cu, and Zn. The human health risk models provided by USEPA have been used to evaluate the non-carcinogenic and carcinogenic risks associated with the consumption of vegetables by local residents. Results indicated that both adults and children were suffering potential health risks. And the consumption of lettuce and sweet potato caused the greatest health risk, whereas cabbage and cowpea were relatively safe. The bioaccumulation factors (BAF) of heavy metals in various vegetables were calculated, and different vegetables showed huge variance in metal accumulation. Considering both contamination status and health risk assessment, cabbage and cowpea were selected as low accumulators of heavy metals. This study reveals the need for adjusting plantation structure and applying amendments to current protocols to alleviate the adverse effects caused by soil pollution.
调查电子垃圾拆解场地周边农田质量并采取积极措施确保当地食品安全迫在眉睫。从中国一个有著名历史电子垃圾活动的城市的菜地里采集了11种蔬菜（n = 184）及其相应土壤。内梅罗综合污染指数分析表明，当地菜地受到一定程度的重金属污染，尤其是镉、铜和锌。美国环境保护局提供的人体健康风险模型已用于评估当地居民食用蔬菜所带来的非致癌和致癌风险。结果表明，成人和儿童都面临潜在健康风险。食用生菜和红薯造成的健康风险最大，而白菜和豇豆相对安全。计算了各种蔬菜中重金属的生物富集因子（BAF），不同蔬菜在金属积累方面表现出巨大差异。综合考虑污染状况和健康风险评估，白菜和豇豆被选为重金属低积累蔬菜。本研究表明需要调整种植结构并对现行方案应用改良措施，以减轻土壤污染造成的不利影响。
