佟俊婷;韦超;郭华明;

• 1:中国地质大学生物地质和环境地质国家重点实验室
• 2:中国地质大学(北京)水资源与环境学院
• 3:中国计量研究院

摘要(Abstract)：

为了研究地方性砷中毒高发区作物中砷含量及其对人体健康的威胁,在内蒙古自治区河套平原4个自然村采集了72个谷物蔬菜水果、81份人体尿样和8个自来水样品。用高效液相色谱-电感耦合等离子体质谱(HPLC-ICP-MS)分析测定采集的样品中各形态砷及其含量;用ICP-MS分析测定消解后的作物样品中砷总量。结果表明,自来水中总砷含量均小于1.0μg·L-1。尿液样品中总砷含量为4.50～319μg·L-1(平均值为56.9μg·L-1),二甲基砷(DMA)是尿砷的主要形态(>70%)。作物中砷的主要形态有无机三价砷As(III)、无机五价砷As(V)和DMA。谷物和蔬菜水果中总砷含量的最大值分别为102和335μg·kg-1。成人和儿童最大日摄入砷量分别为232和205μg。通过分析采样地人体尿砷、作物砷和地方性砷中毒发病率的相关性得出,作物中砷的含量虽未明显超过国家标准,但对人体健康有明显的潜在威胁。政府改水后(饮用水由井水变为达标的自来水),人体的健康风险主要来自作物中的砷,而不是饮用水中的砷。

关键词(KeyWords)： 内蒙古河套平原;砷形态;地方性砷中毒;健康风险

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(41222020,41172224);; 霍英东教育基金会基础研究(131017)

作者(Author): 佟俊婷;韦超;郭华明;

Email:

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