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PHYTOREMEDIATION OF HEAVY METALS BY SELECTED HYDROPHYTES

机译：精选水生植物对重金属的植物修复

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摘要

The fresh water resource is facing serious threat from different sources of pollution. Many researchers have established that one of the most efficient and cost effective way to combat water pollution is Phytoremediation. One of the objectives of the study is to assess the status of water quality at the point source where effluent is discharged in Periyar river. The study also aims to examine the efficiency of Eichhomia, Salvinia, Lemna and Pistia to remove nitrate, Phosphate and heavy metals such as Zinc and Cadmium. It is found that at the point source where the effluent is discharged (downstream), water is more polluted compared to Upstream. The study confirmed the efficiency of Eichhomia, Salvinia, Pistia and Lemna to remove nitrate, phosphate and heavy metals such as cadmium and zinc. The study revealed that the BCF value of Pistia is higher than Eichhomia with respect to zinc. However the Percentage efficiency of Eichhomia is greater than Pistia. Higher BCF value for Salvinia indicates that it is a better hyper accumulator of Zinc compared to Lemna. It is found that in this case the percentage efficiency is in conformity with the BCF value.
机译：淡水资源正面临着来自不同污染源的严重威胁。许多研究人员已经确定，植物修复是对抗水污染的最有效，最具成本效益的方法之一。该研究的目的之一是评估Periyar河中排放废水的点源的水质状况。该研究还旨在检验凤眼莲，萨尔维尼亚，Lemna和水浮萍去除硝酸盐，磷酸盐和重金属（例如锌和镉）的效率。发现在废水排放的点源（下游），与上游相比，水受到的污染更大。该研究证实了凤眼莲，萨尔维尼亚，水浮萍和蓝藻去除硝酸盐，磷酸盐和重金属如镉和锌的效率。研究表明，就锌而言，Pistia的BCF值高于Eichhomia。但是，Eichhomia的百分效率高于Pistia。 Salvinia的BCF值较高表明，与Lemna相比，它是更好的锌超级蓄积剂。发现在这种情况下百分比效率与BCF值一致。

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