Highligh'/> Evaluation of heavy metal contamination using environmetrics and indexing approach for River Yamuna, Delhi stretch, India
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Evaluation of heavy metal contamination using environmetrics and indexing approach for River Yamuna, Delhi stretch, India

机译：使用环境计量学和指数法对印度德里河亚穆纳河进行重金属污染评估

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Highlights ? River Yamuna (Delhi stretch) polluted with high concentrations for most of the heavy metals beyond permissible limits. ? Delhi stretch is critically polluted stretch in terms of Heavy metal pollution index. ? Najafgarh and Shahdara drain outlet in the river identified as the hot-spots of metal contamination. ? Principal component analysis resulted in two components each having its own pollution source. Abstract The objective of the present study is to investigate the current status of heavy metal pollution in River Yamuna, Delhi stretch. The concentrations of Nickel, Cadmium, Chromium, Copper, Iron, Lead, and Zinc in water samples have been studied during December 2013–August 2015. The overall mean concentration of heavy metals was observed in the following order FeCuZnNiCrPbCd. Correlation analysis formed two distinct groups of heavy metals highlighting similar sources. This was further corroborated by results from principal components analysis that showed similar grouping of heavy metals (Ni, Zn, Fe, Pb, Cd) into PC1 having one common source for these heavy metals and PC2 (Cu, Cr) having another common source. Further, our study pointed out two sites i.e. Najafgarh drain and Shahdara drain outlet in river Yamuna as the two potential sources responsible for the heavy metal contamination. Based on heavy metal pollution index value (1491.15), we concluded that our study area as a whole is critically polluted with heavy metals under study due to pollutant load from various anthropogenic activities.
机译： 突出显示 ？ Yamuna河（德里延伸区）对大多数重金属的高浓度污染超出了允许的范围。 ？ 德里拉伸是严重污染的拉伸重金属污染指数。 ？ Najafgarh和Shahdara的河流排水口被确定为金属污染的热点。 ？ 主成分分析得出两个成分都有各自的污染源。 摘要 目标本研究的目的是调查德里河段亚穆纳河中重金属污染的现状。在2013年12月至2015年8月期间研究了水样中镍，镉，铬，铜，铁，铅和锌的浓度。按以下顺序观察到重金属的总平均浓度Fe Cu Zn Ni Cr Pb Cd。相关分析形成了两个不同的重金属组，突出了相似的来源。主成分分析的结果进一步证实了这一点，该结果显示重金属（Ni，Zn，Fe，Pb，Cd）以相似的方式分组为具有这些重金属的一个共同来源的PC1和具有另一共同来源的PC2（Cu，Cr）。此外，我们的研究指出了Yamuna河中的Najafgarh排水口和Shahdara排水口这两个地点，是造成重金属污染的两个潜在来源。根据重金属污染指数值（1491.15），我们得出结论，由于各种人为活动造成的污染物负荷，整个研究区域被重金属污染严重。

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