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引用本文:阿地拉·艾来提,麦麦提吐尔逊·艾则孜,靳万贵,姑力巴努·艾尼,艾尼瓦尔·买买提,阿里木江·卡斯木. 新疆库尔勒市道路积尘重金属污染及健康风险评价[J]. 中国地质, 2020, 47(6): 1915-1925.
Adila HAYRAT,Mamattursun EZIZ,JIN Wangui,Gulbanu HINI,Anwar MOHAMMAD,Alimujiang KASIMU. Pollution and health risks assessment of heavy metals of road dust in Korla City, Xinjiang[J]. Geology in China, 2020, 47(6): 1915-1925(in Chinese with English abstract).
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新疆库尔勒市道路积尘重金属污染及健康风险评价
阿地拉·艾来提1, 麦麦提吐尔逊·艾则孜1,2, 靳万贵1, 姑力巴努·艾尼1, 艾尼瓦尔·买买提3, 阿里木江·卡斯木4
1.新疆师范大学地理科学与旅游学院, 新疆 乌鲁木齐 830054;2.新疆干旱区湖泊环境与资源实验室, 新疆师范大学, 新疆乌鲁木齐 830054;3.新疆大学化学与化工学院, 新疆 乌鲁木齐 830046;4.新疆师范大学丝绸之路经济带城市发展研究中心, 新疆 乌鲁木齐 830054
摘要:
为探究绿洲城市道路积尘重金属污染风险,在新疆库尔勒市采集54个代表性道路积尘样品,分析其中Hg、Cd、As、Pb、Cr和Cu等6种元素含量,基于GIS技术与地学统计法,采用污染负荷指数法和US EPA健康风险评价模型,对道路积尘中重金属污染及潜在健康风险进行评价。结果表明:库尔勒市道路积尘中Hg、Cd、As、Pb和Cu等元素含量的平均值均小于土壤环境质量—建设用地土壤污染风险管控标准(GB 36600—2018)中的筛选值,但Cr元素含量平均值为相应筛选值的9.90倍。污染评价结果表明,研究区道路积尘中Cr呈现重度污染,Hg、Cd、As、Pb和Cu呈无污染。道路积尘中重金属元素的污染负荷指数介于0.0142~0.0522,平均值为0.0266,处于无污染水平。从道路积尘重金属污染空间分布格局来看,库尔勒市东北部和北部区域出现污染高值区。健康风险评估结果表明,经手-口摄入途径是库尔勒市道路积尘重金属日均暴露量及健康风险的主要途径,儿童受到的健康风险高于成人。库尔勒市道路积尘中Hg、Cd、As、Pb、Cr与Cu等元素的非致癌风险及致癌风险处于安全范围内,As对非致癌风险的贡献最大,Cr对致癌风险的贡献最大。
关键词:  道路积尘  重金属  环境地质调查工程  污染  健康风险  库尔勒市  新疆
DOI:10.12029/gc20200625
分类号:X53
基金项目:国家自然科学基金项目(41867067与41561073)资助。
Pollution and health risks assessment of heavy metals of road dust in Korla City, Xinjiang
Adila HAYRAT1, Mamattursun EZIZ1,2, JIN Wangui1, Gulbanu HINI1, Anwar MOHAMMAD3, Alimujiang KASIMU4
1.College of Geographical Science and Tourism, Xinjiang Normal University, Urumqi 830054, Xinjiang, China;2.Xinjiang Laboratory of Lake Environment and Resources in Arid Zone, Xinjiang Normal University, Urumqi 830054, Xinjiang, China;3.College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, Xinjiang, China;4.Silk Road Economic Belt Urban Development Research Center, Xinjiang Normal University, Urumqi 830054, Xinjiang, China
Abstract:
In order to evaluate the pollution risk of heavy metals in road dust of the oasis city, the authors collected a total of 54 typical road dust samples from Korla, Xinjiang, and analyzed the concentrations of Hg, Cd, As, Pb, Cr, and Cu elements. The pollution and potential health risk of heavy metals in road dust were analyzed on the basis of GIS technology and geostatistical analysis methods and by using the Pollution Load Index and the US EPA health risk assessment model. The obtained results indicate that the average concentrations of Hg, Cd, As, Pb, and Cu elements in the road dust of Korla City are less than the screening values of the Soil Environmental Quality-Control Standard for Soil Contamination of Development Land (GB 36600-2018), but the average concentration of Cr exceeds the corresponding screening value by factor of 9.90 times. The results of pollution assessment indicate that heavy metals in the collected dust samples are heavily polluted by Cr, without pollution by Hg, Cd, As, Pb, and Cu. The Pollution Load Index of heavy metals in road dust varies in the range of 0.0142~0.0522, with an average value of 0.0266, at the no pollution level. The spatial distribution patterns of the six heavy metals in road dust indicate that the high concentrations are distributed mainly in the northeastern and northern areas of Korla City. The results of health risk assessment indicate that the handmouth ingest intake is the dominant pathway of the average daily exposure and health risks of road dusts in Korla, and the health risk of heavy metals in road dust for children are higher than that for adults. The non-carcinogenic and carcinogenic risk of metals such as Hg, Cd, As, Pb, Cr, and Cu in road dust in Korla is within the safe range. As contributes most to non-carcinogenic risk, whereas Cr contributes most to carcinogenic risk of road dust in Korla City.
Key words:  road dust  heavy metals  environmental geological survey project  pollution  health risks  Korla City  Xinjiang