在米蒂贾平原 (阿尔及利亚北部) 的地下水中发现重金属
Dalale Khous1, Hadjer Chorfi1, Mounia Benchabane1
1Nuclear Techniques Applications Department, Algiers Nuclear Research Centre, Algiers, Alger-RP, Algeria.
概括
阿尔及利亚米蒂贾平原的地下水显示出大量来自工业和农业来源的重金属污染. 卫生风险评估揭示了非致癌和致癌风险,特别是对儿童,影响饮用水安全.
科学领域:
- 环境科学 环境科学
- 水文地质学 水文地质学
- 公共卫生 公共卫生
背景情况:
- 阿尔及利亚北部的米蒂贾平原面临着日益严重的地下水污染.
- 工业废水,污水和农业废水是影响水质的关键来源.
研究的目的:
- 评估米蒂贾平原地下水受到重金属 (Fe,Mn,Pb,Cr,Cu,Cd,Zn) 的污染情况.
- 为了确定重金属污染的来源.
- 评估与污染地下水相关的潜在健康风险.
主要方法:
- 从17个地点收集地下水样本进行重金属分析.
- 在41个采样点测量了主要的物理化学参数.
- 应用多变量统计分析 (主要成分分析) 并计算重金属污染指数 (HPI).
- 进行健康风险评估,包括危险指数 (HI) 和增量终身癌症风险 (ILCR).
主要成果:
- 重金属度遵循的是Fe > Zn > Mn > Pb > Cu > Cr > Cd的顺序.
- 一些样本超过了世界卫生组织 (WHO) 的指导方针.
- 多变量分析表明了自然和人为污染源.
- 高的HPI值证实了大量的重金属污染,使地下水不安全饮用.
- 成人和儿童的危险指数 (HI) 超过1,儿童的风险更高.
- 的增量终身癌症风险 (ILCR) 超过了儿童可接受的极限.
结论:
- 米蒂贾平原的地下水严重受到重金属污染.
- 自然过程和人类活动都会导致污染.
- 地下水与大量非致癌性和致癌性健康风险有关,特别是对儿童.
- 迫切需要采取措施减轻污染,保护公共健康.
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