焉耆盆地地下水重金属生态风险评价
Ecological risk assessment of heavy metals in groundwater in the Yanqi Basin
穆耶赛尔·麦麦提 1麦麦提吐尔逊·艾则孜 1李新国2
作者信息
- 1. 新疆师范大学地理科学与旅游学院,乌鲁木齐 830054;新疆师范大学,新疆干旱区湖泊环境与资源实验室,乌鲁木齐 830054
- 2. 新疆师范大学地理科学与旅游学院,乌鲁木齐 830054
- 折叠
摘要
为探究内陆盆地地下水中重金属的潜在生态风险,分析焉耆盆地67组地下水样品中6种重金属的含量,采用潜在生态风险指数(RI)和生态风险预警指数(IER),对地下水中重金属产生的生态风险进行评估.结果表明:研究区地下水中Cd和Ni含量平均值分别为《GB/T 14848-2017地下水质量标准》中Ⅲ类标限值的1.4倍和1.15倍;地下水中重金属单项生态风险指数(Ei)平均值从大到小依次为Cd＞Ni＞Mn＞Cr＞Cu＞Zn,均属于轻微生态风险,地下水重金属RI平均值为23.89,属于轻微生态风险;研究区地下水中重金属单项生态风险预警指数(IERi)平均值从大到小依次为Cd=Mn＞Ni＞Cr＞Zn＞Cu,均属于无警态势,地下水IER的平均值为-3.87,呈现无警态势;焉耆盆地地下水中各重金属的Ei与IERi指数呈现不同的空间分布规律.整体上,Cd是焉耆盆地地下水中潜在生态风险最高的重金属,值得关注.
Abstract
To identify the potential ecological risks of heavy metals in groundwater in inner river basin,we collected 67 groundwater samples from the Yanqi Basin and analyzed the concentrations of six heavy metals.The potential ecological risks of heavy metals were quantitatively assessed using the potential ecological risk index(RI)and the ecological risk warning index(IER).Results showed that the average concentrations of Cd and Ni in groundwater were equal to 1.4 times and 1.15 times of the Class Ⅲ thresholds of the"Standard for Groundwater Quality(GB/T 14848-2017)",respectively.The average values of the single potential ecological risk index(Ei)of heavy metals in groundwater were ranked Cd＞Ni＞Mn＞Cr＞Cu＞Zn,being at a slight ecological risk.The average RI value of heavy metals in groundwater was 23.89,indicating a slight ecological risk level.The average value of the single ecological risk warning index(IERi)of heavy metals in groundwater was ranked Cd=Mn＞Ni＞Cr＞Zn＞Cu,indicating a no warning level for all the analyzed heavy metals.The average IER value of heavy metals in groundwater was-3.87,indicating a no warning level.The Ei and IERi index of each heavy metal in groundwater in the Yanqi Basin showed different spatial distribution patterns.Overall,Cd is the potential heavy metal with the highest ecological risk in the groundwater in the Yanqi Basin,which deserves attention.
关键词
地下水/重金属/生态风险/预警/焉耆盆地Key words
groundwater/heavy metal/ecological risk/early warning/Yanqi Basin引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据