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| 清水河流域水体中5种重金属的分布特征及健康风险评价 |
| Distribution Characteristics and Health Risk Assessment of Five Heavy Metals in the Water of Qingshuihe River Basin |
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| DOI： |
| 中文关键词: 重金属 内梅罗综合污染指数 健康风险评价 清水河流域 |
| 英文关键词: Heavy metals Nemerow comprehensive pollution index Health risk assessment Qingshuihe river basin |
| 基金项目:宁夏高等学校一流学科建设（水利工程）基金资助项目（NXYLXK2017A03） |
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| 中文摘要: |
| 通过2018年在清水河流域布设32个采样点监测各水期Cu、Fe、Mn、Zn和Cd 5种重金属质量浓度，分析重金属污染状况和来源，并评价对人体产生的健康风险。结果表明：总体上清水河流域5种重金属质量浓度较低，除了Fe在丰水期平均质量浓度超过标准值外，其余均未超标。各采样点重金属质量浓度存在较大差异，总体表现为支流高于干流。受污染最严重的水期为丰水期，受污染最严重的区域为苋麻河，主要污染贡献因子为Fe。5种重金属产生的总健康风险最高为313×10-7 a-1，远低于USEPA推荐的最大可接受水平（1×10-4 a-1），其中致癌污染物Cd产生的健康风险最大。 |
| 英文摘要: |
| The concentration of Cu, Fe, Mn, Zn, Cd in 32 sampling sites in Qingshuihe river basin were monitored in different water periods in 2018. The situation and source of heavy metal pollution were analyzed, the health risks were assessed. The results showed that the concentration of the five heavy metals in Qingshuihe river basin were relatively low in general. Except for Fe average mass concentration exceeded the standard during the wet season, others did not. The concentrations of heavy metals in each sampling site were significantly different, and were higher in tributary stream than that in the main stream as a whole. The pollution was the most serious in wet season. Xianmahe river was most polluted. Fe was the main pollutant. The highest total health risk caused by the five heavy metals was 3.13×10-7 a-1, which was far below the maximum acceptable level recommended by USEPA (1×10-4a-1) . Cd as a carcinogenic pollutant had the greatest health risk. |
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