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| 新疆焉耆盆地地下水重金属环境容量 |
| Environmental Capacity of Heavy Metals in Groundwater in Yanqi Basin， Xinjiang |
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| DOI： |
| 中文关键词: 地下水 重金属 环境容量 空间分布 焉耆盆地 |
| 英文关键词: Groundwater Heavy metals Envir onmental capacity Spatial distribution Yanqi Basin |
| 基金项目:国家自然科学基金资助项目（U2003301） |
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| 摘要点击次数: 83 |
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| 中文摘要: |
| 从新疆焉耆盆地采集67组地下水样品，测定Cd、Cr、Cu、Mn、Ni和Zn等6种重金属元素的含量，采用污染负荷指数（PLI）法和地下水环境容量指数（Qd），分析地下水重金属污染及环境容量特征。结果表明，焉耆盆地地下水中Cr、Cu、Mn和Zn等4种重金属平均值均低于《地下水质量标准》（GB/T 14848—2017）中Ⅲ类标准限值，Cd和Ni平均值分别为Ⅲ类标准限值的140倍和115倍。研究区地下水中各重金属单项污染指数平均值从大到小依次为Mn＞Cd＞Ni＞Cr＞Zn＞Cu，均呈无污染。地下水中重金属PLI变化范围为030～057，平均值为039，呈无污染。研究区地下水中6种重金属环境容量指数平均值从大到小依次为Cu＞Zn＞Cr＞Mn＞Ni＞Cd，Cu的环境容量最大，Cd的环境容量最小。研究区地下水中6种重金属环境容量空间分布格局各不相同。 |
| 英文摘要: |
| The concentration of Cd， Cr， Cu， Mn， Ni and Zn were determined in 67 groups of groundwater samples from Yanqi Basin， Xinjiang， the characteristics of heavy metal pollution and environmental capacity of groundwater were analyzed by pollution load index（PLI） and groundwater environmental capacity index（Qd）. The results showed that the average concentration of Cr， Cu， Mn and Zn in groundwater in Yanqi Basin were lower than Class Ⅲ quality standards in “Standard for Groundwater Quality ”（GB/T 14848—2017）， the average concentration of Cd and Ni were 140 times and 115 times of Class Ⅲ quality standards， respectively. The average pollution index of each heavy metal in groundwater of the study area was arranged in descending order as Mn， Cd， Ni， Cr， Zn， Cu， and its PLI ranged from 030 to 057， with an average of 039， showing that the groundwater was uncontaminated. The average environmental capacity index of heavy metals was ranked from large to small as Cu， Zn， Cr， Mn， Ni， Cd， with Cu having the largest environmental capacity and Cd having the smallest. The spatial distribution pattern of the environmental capacity of six heavy metals in groundwater was different. |
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