Escalating health risk of thallium and arsenic from farmland contamination fueled by cement-making activities: A hidden but significant source.
Escalating health risk of thallium and arsenic from farmland contamination fueled by cement-making activities: A hidden but significant source.
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DOI：
10.1016/j.scitotenv.2021.146603
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发表时间：
2021-03
期刊：
影响因子：
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通讯作者：
Yuchen Zhou;Jin Wang;Xudong Wei;Shixing Ren;X. Yang;Jingzi Beiyuan;Lezhang Wei;Juan Liu;
中科院分区：
文献类型：
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作者：
Yuchen Zhou;Jin Wang;Xudong Wei;Shixing Ren;X. Yang;Jingzi Beiyuan;Lezhang Wei;Juan Liu;
有毒金属（类）从土壤到植物的迁移是人类接触化学中毒的关键途径。铊 (Tl) 和砷 (As) 是剧毒金属，但人们对它们在土壤和蔬菜中共存的情况仍知之甚少。在此，本研究重点关注以水泥生产活动为特色的工业区周围不同农田种植的各种常见蔬菜中 Ts 单键共存所带来的潜在健康风险。结果表明，土壤中存在明显的铊 (2.28 ± 1.39 mg/kg) 和砷 (102.0 ± 66.7 mg/kg) 共同污染。在水泥厂的飞灰中检测到含有硫化物和其他与铊和砷相关的矿物的细颗粒，这些细颗粒可以通过风远距离迁移，造成隐蔽但不可避免的污染。生物富集因子（BCF）和富集因子（EF）表明，芋头和玉米优先富集Tl，尤其是在地下部分。危险商数（HQ）表明食用这些蔬菜可能会导致慢性中毒和/甚至致癌风险。研究强调，水泥生产活动对附近农田造成单键As复合污染的途径和高风险应引起高度关注。
Soil-to-vegetable migration of toxic metal(loid)s is a pivotal pathway of human exposure to chemical intoxication. Thallium (Tl) and arsenic (As) are highly toxic metal(loid)s but their co-occurrence in soils and vegetables remain poorly understood. Herein, the present study focuses on potential health risk arising from co-occurrence of Tlsingle bondAs in various common vegetables cultivated in different farmlands around an industrial area featured by cement production activities. The results reveal obvious co-contamination of Tl (2.28 ± 1.39 mg/kg) and As (102.0 ± 66.7 mg/kg) in soils. Fine particles bearing sulfide and other minerals associated with Tl and As are detected in fly ash from cement plant, which can be migrated by wind over a long distance with hidden but inevitable pollution. Bioaccumulation Factor (BCF) and Enrichment Factor (EF) show that taro and corn preferentially accumulate Tl especially in underground parts. Hazard Quotient (HQ) indicates that consumption of these vegetables may result in chronic poisoning and/or even carcinogenic risk. The study highlights that the pathway and high risk of co-contamination of Tlsingle bondAs in the nearby farmlands posed by cement-making activities should be highly concerned.