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| 黄河宁夏段水体重金属时空分布特征及健康风险评价 |
| Spatial and Temporal Distribution Characteristics and Health Risk Assessment of Heavy Metals in Water of Ningxia Section of the Yellow River |
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| DOI： |
| 中文关键词: 重金属 分布特征 健康风险评价 黄河宁夏段 |
| 英文关键词: Heavy metals Distribution characteristic Health risk assessment Ningxia section of the Yellow River |
| 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（NXYLXK2021A03） |
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| 中文摘要: |
| 通过2019—2020年在黄河宁夏段布设12个采样点监测各季节水体中Cu、Zn、Cd、Hg 4种重金属的质量浓度，分析重金属污染状况和来源，并评价对人体的健康风险。结果表明：黄河宁夏段水体4种重金属质量浓度由高到低为Zn＞Cu＞Cd＞Hg，除了Hg质量浓度有超过Ⅱ类标准限值外，其余重金属均未超标。4种重金属春、夏、秋的浓度高于冬季，Zn浓度分布差异最大。4种重金属对人体产生的总健康风险最大值成人为3.76×10-6 a-1，儿童为4.40×10-6 a-1，远低于最大可接受水平1×10-4 a -1 ，Cd为主要贡献因子。水体中Cu、Cd、Hg可能来源于工农业生产和降雨稀释,Zn可能来源于旅游交通运输和土壤淋溶。 |
| 英文摘要: |
| Based on the mass concentrations of four heavy metals, Cu, Zn, Cd and Hg from 12 sampling sites in Ningxia section of the Yellow River in various seasons from 2019 to 2020, the status and sources of heavy metal pollution were analyzed, and the health risks to human body were evaluated. The results showed that the mass concentrations of the four heavy metals in Ningxia section of the Yellow River from high to low were Zn＞Cu＞Cd＞Hg. Except for Hg mass concentration exceeding class Ⅱ standard limit, other heavy metals did not exceed the standard. The concentrations of the four heavy metals were higher in spring, summer and autumn than those in winter. The difference of Zn concentration distribution was the largest. The maximum total health risk of the four heavy metals to human body was 3.76×10-6 a-1 for adults and 4.40×10-6 a-1 for children, far below the maximum acceptable level of 1×10-4 a-1. Cd was the main contributing factor. Cu, Cd and Hg in water might come from industrial and agricultural production and rainfall dilution, while Zn might come from tourism transportation and soil leaching. |
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