新疆玛河流域土壤和蔬菜汞分布特征与生态、人体健康风险评价

发布时间：2018-07-03 06:39

本文选题：土壤汞 + 蔬菜汞　；参考：《环境化学》2017年11期

【摘要】：采集玛河流域140份土壤和126株蔬菜样品进行汞含量分析,检测土壤矿物质成分,分析污染状况,探究表层土壤汞空间分布特征和来源,探讨人体健康风险.结果表明,研究区表层土壤汞含量最高,含量在0.001—0.901 mg·kg~(-1),平均值为0.187 mg·kg~(-1),是新疆背景值的11倍.土壤矿物成分相似,主要为石英、长石、伊利石、蒙脱石、方解石.富集系数及潜在生态危害指数显示,除工业区严重富集外其余为中度到轻度富集,整体处于严重生态危害,形成了以化工园为中心的点—面污染.地统计学和多元统计学表明,研究区汞含量空间变异大,存在显著差异,化工园区汞含量最高,主要来源于工业生产;其次是城市和农业区,主要受到城市生活垃圾和农药、交通的影响;人类活动罕见的山区和沙漠地区含量最低.健康风险评价表明,土壤汞对儿童和成人的非致癌风险(HI)均在可接受范围内,沙湾大型电解铝厂周围菊科蔬菜汞对人体造成非致癌风险,其余区域均在可接受范围内.
[Abstract]:140 soil and 126 vegetable samples in the ma he basin were collected to analyze the mercury content, to detect the soil mineral composition, analyze the pollution status, explore the spatial distribution characteristics and sources of the mercury in the surface soil, and explore the human health risk. The results show that the mercury content in the surface soil of the study area is the highest, the content is from 0.001 to 0.901 mg. Kg~ (-1), with an average of 0.187 mg Kg~ (-1) is 11 times the background value of Xinjiang. The soil mineral composition is similar, mainly quartz, feldspar, illite, montmorillite, calcite. The enrichment coefficient and the potential ecological hazard index show that the other is moderately to mild enrichment in addition to the serious enrichment of the industrial area, and the whole is in the severe ecological hazard, forming a point and surface pollution centered on the chemical garden. Geostatistics and multivariate statistics show that the spatial variation of mercury content in the study area is large and there are significant differences. The highest mercury content in the chemical industry park is from industrial production; secondly, urban and agricultural areas are mainly affected by urban living garbage and pesticides, and the traffic is the lowest in human activities. Health risks are the lowest. The assessment shows that the non carcinogenic risk (HI) of soil mercury in children and adults is within acceptable range. The mercury in the Compositae vegetables around the large electrolytic aluminum factory in Shawan is not carcinogenic to the human body, and the other areas are within acceptable range.
【作者单位】：石河子大学化学化工学院新疆兵团化工绿色过程重点实验室/省部共建国家重点实验室培育基地/材料化工新疆维吾尔自治区重点实验室;
【基金】：国家自然科学基金(21467026,21267020) 石河子大学校级课题(400381010)资助~~
【分类号】：X50;X820.4

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