ABSTRACT

In this study, we investigated the total arsenic concentration in the soil and the related human exposure risks in the central part of the Bardsir Plain in southeastern Iran. The results show that the average total arsenic concentration in agricultural soil is 50.26 mg/kg, which is 2.5 times higher than the maximum acceptable limit (20 mg/kg) recommended by the European Community. The natural portion of the arsenic concentration was larger than the anthropogenic portion. The high total arsenic concentration could be due to a combination of geogenic sources and irrigation with polluted groundwater. The average values of I_geo, I_poll, and I_B for agricultural soils were 1.10, 0.14, and 0.15, respectively; which are characterized as moderately polluted. The average non-carcinogenic hazard (HI) values for children and adults were 2.27 and 0.24, respectively, suggesting that children are exposed to non-carcinogenic risks. The total carcinogen risk (CR) value was 1.16E⁻⁰⁴, which indicates a high risk of harmful effects to inhabitants.

摘要

在这项研究中，我们调查了伊朗东南部 Bardsir 平原中部土壤中的总砷浓度以及相关的人类暴露风险。结果表明，农业土壤中的平均总砷浓度为50.26 mg/kg，比欧共体推荐的最大可接受限值（20 mg/kg）高出2.5倍。砷浓度的自然部分大于人为部分。总砷浓度高可能是由于地质来源和灌溉地下水污染所致。_{I geo}、 I _poll和 I _B的平均值农业土壤分别为 1.10、0.14 和 0.15；以中度污染为特征。儿童和成人的平均非致癌危害 (HI) 值分别为 2.27 和 0.24，表明儿童面临非致癌风险。总致癌物风险 (CR) 值为 1.16E ^-04，这表明对居民造成有害影响的风险很高。