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河流沉积物中的重金属污染:分布,来源和环境影响

Kifayatullah Khan1,2, Muhammad Younas3, Muhammad Yaseen4

  • 1State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China. drkhan@uswat.edu.pk.

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PubMed
概括

巴基斯坦喀布尔河的重金属污染对人类健康和生态系统构成重大风险. (Cd) 和 (Hg) 具有非常高的潜在生态风险,需要采取紧急的污染控制措施.

关键词:
生态风险 生态风险重金属是一种重金属.多变量分析多变量分析.喀布尔河 喀布尔河 喀布尔河河流沉积物的沉积物

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科学领域:

  • 环境科学 环境科学
  • 地质化学 地质化学
  • 生态毒理学 生态毒理学

背景情况:

  • 河流沉积物作为重金属污染的关键指标.
  • 巴基斯坦的喀布尔河面临潜在的污染风险,影响人类健康和水生生态系统.
  • 了解重金属的分布和来源对于有效的环境管理至关重要.

研究的目的:

  • 评估喀布尔河沉积物中重金属 (Cr, Mn, Co, Ni, Cu, Zn, Cd, Hg, Pb, Fe, Al) 的含量和空间分布.
  • 确定与这些重金属相关的污染状况和潜在的生态风险.
  • 确定河流环境中重金属污染的来源和相关性.

主要方法:

  • 在河流沉积物中分析重金属度,使用已知方法.
  • 计算污染因子 (CF),污染负载指数 (PLI) 和地质积累指数 (Igeo) 以评估污染水平.
  • 应用相关统计,集群分析和主要成分分析 (PCA) 来确定金属来源和关系.
  • 使用值效应度 (TEC) 和可能效应度 (PEC) 评估生态风险.

主要成果:

  • 在重金属度中观察到显著的空间变化,铁 (Fe) 和 (Al) 是最丰富的.
  • (Cd) 和 (Hg) 的污染程度最高,地质积累指数 (Igeo) 值表明污染程度中等至极端.
  • 污染因子 (CF) 和污染负载指数 (PLI) 值突出显示监测站点S-9是污染最严重的.
  • 主要组件分析确定了工业,农业化学,采矿和家庭废水排放,以及地质投入,作为主要来源.
  • (Cd) 和 (Hg) 构成非常高的潜在生态风险 (PERI),需要立即关注.

结论:

  • 喀布尔河的沉积物被各种重金属污染,造成了严重的生态风险,特别是Cd和Hg.
  • 多种人类和地质源导致河流中的重金属污染.
  • 需要采取紧急的污染控制战略,以减轻有害的生物影响并保护河流生态系统.