| 开都河下游绿洲农田土壤微量元素污染及潜在健康风险评价 |
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| 引用本文： | 阿吉古丽&#;马木提,麦麦提吐尔逊&#;艾则孜,艾尼瓦尔&#;买买提,迪力夏提&#;司马义.开都河下游绿洲农田土壤微量元素污染及潜在健康风险评价[J].农业环境科学学报,2018,37(10):2142-2149. |
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| 作者姓名： | 阿吉古丽&#;马木提 麦麦提吐尔逊&#;艾则孜 艾尼瓦尔&#;买买提 迪力夏提&#;司马义 |
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| 作者单位： | 新疆师范大学地理科学与旅游学院;新疆大学化学化工学院 |
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| 基金项目： | 国家自然科学基金项目（41561073）；新疆干旱区湖泊环境与资源实验室开放课题（XJDX0909-2013-02） |
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| 摘 要： | 从新疆开都河下游绿洲农田土壤采集98个土壤样品,测定其中As、Cd、Cr、Cu、Ni、Pb和Zn的含量,利用地累积指数(I_(geo))评价农田土壤污染水平,采用US EPA健康风险评价模型,对农田土壤微量元素污染的潜在健康风险进行评估。结果表明,研究区农田土壤中Zn呈现轻度污染,Cd与Pb呈现轻微污染,As、Cr、Cu与Ni呈现无污染态势。研究区农田土壤中7种微量元素在3种暴露途径下成人和儿童的潜在非致癌风险商(HQ)从大到小依次为HQ_(Pb)HQ_(As)HQ_(Cr)HQ_(Cd)HQ_(Cu)HQ_(Ni)HQ_(Zn);HQ与潜在非致癌风险指数(HI)均小于1,属于可接受风险水平,微量元素对儿童的HI略小于成人。As和Cd在3种暴露途径下成人和儿童的单项致癌风险指数CR_(As)大于CR_(Cd)。CR与总致癌风险指数(TCR)均小于10-4,属于可接受风险水平;微量元素对儿童的潜在致癌风险略高于成人。研究区农田土壤中As、Cr与Pb是最主要的潜在非致癌风险因子,As是最主要的潜在致癌风险因子。
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| 关 键 词： | 农田土壤 微量元素 健康风险 绿洲 开都河 |
| 收稿时间： | 2018/1/9 0:00:00 |
Assessment of trace element pollution of farmland soils in the oases along the lower reaches of the Kaidu River and its potential health risks |
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| Ajigul Mamut,Mamattursun Eziz,Anwar Mohammad and Dilshat Ismayil.Assessment of trace element pollution of farmland soils in the oases along the lower reaches of the Kaidu River and its potential health risks[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2018,37(10):2142-2149. |
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| Authors: | Ajigul Mamut Mamattursun Eziz Anwar Mohammad and Dilshat Ismayil |
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| Institution: | College of Geographical Science and Tourism, Xinjiang Normal University, Urumqi 830054, China,College of Geographical Science and Tourism, Xinjiang Normal University, Urumqi 830054, China,College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, China and College of Geographical Science and Tourism, Xinjiang Normal University, Urumqi 830054, China |
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| Abstract: | From the oases along the lower reaches of the Kaidu River, 98 farmland soil samples were collected, and their concentrations of As, Cd, Cr, Cu, Ni, Pb, and Zn were determined. The contamination level of trace elements of the farmland soils was analyzed based on the Geoaccumulation Index (Igeo), and the risk to human health was assessed using the US EPA Health Risk Assessment Model. The results obtained indicated that the average contents of Zn in the farmland soils fell in the light contamination range; Cd and Pb fell in the slight contamination range while As, Cr, Cu, and Ni fell in the no contamination range. The average noncarcinogenic risk quotient (HQ) value for each trace element in the farmland soils, was as follows:HQPb > HQAs > HQCr > HQCd > HQCu > HQNi > HQZn. The HQ and noncarcinogenic risk index (HI) were lower than 1, which within the limit of acceptable risk. The HI values of trace elements in the farmland soils were lower for children than for adults. The individual carcinogenic health risk index (CR) of As, via three exposure pathways for both adults and children, was higher than that of Pb. The CR and total carcinogenic health risk index (TCR) values were lower than 10-4, which means that they are within the limit of acceptable risk, and the TCR values of trace elements for children were higher than those for adults. As, Cr, and Pb were the main noncarcinogenic risk factors, whereas As was the main carcinogenic risk factor for farmland soils of the study area. |
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| Keywords: | farmland soils trace elements health risk assessment oasis Kaidu River |
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