Department of Environmental Sciences, Faculty of Biosciences, University of Veterinary and Animal Sciences, Lahore, Pakistan.
Department of Environmental Sciences and Engineering, Government College University, Faisalabad, Pakistan.
Int J Phytoremediation. 2019;21(13):1356-1367. doi: 10.1080/15226514.2019.1633259. Epub 2019 Jul 31.
In the present study, the effectiveness of water hyacinth and water lettuce was tested for the phytoremediation of landfill leachate for the period of 15 days. Fifteen plastic containers were used in experimental setup where aquatic plants were fitted as a floating bed with the help of thermo-pole sheet. It was observed that both plants significantly ( < 0.05/ < 0.01/ < 0.001) reduce the physicochemical parameters pH, TDS, BOD, COD and heavy metals like Zn, Pb, Fe, Cu and Ni from landfill leachate. Maximum reduction in these parameters was obtained at 50% and 75% landfill leachate treatment and their removal rate gradually increased from day 3 to day 15 of the experiment. The maximum removal rate for heavy metals such as for Zn (80-90%), Fe (83-87%) and Pb (76-84%) was attained by and . Value of bioconcentration and translocation factor was less than 1 which indicates the low transport of heavy metals from roots to the above-ground parts of the plants. Both these plants accumulate heavy metals inside their body without showing much reduction in growth and showing tolerance to all the present metals. Therefore, results obtained from the study suggest that these aquatic plants are suitable candidate for the removal of pollution load from landfill leachate.
在本研究中，水葫芦和水蕹菜的有效性进行了测试，用于 15 天的垃圾渗滤液植物修复。在实验装置中使用了 15 个塑料容器，在热棒片的帮助下将水生植物作为浮床安装。结果表明，两种植物都显著（<0.05/<0.01/<0.001）降低了垃圾渗滤液的理化参数 pH、TDS、BOD、COD 和重金属如 Zn、Pb、Fe、Cu 和 Ni。在 50%和 75%的垃圾渗滤液处理中，这些参数的最大减少量最大，其去除率从实验的第 3 天到第 15 天逐渐增加。Zn（80-90%）、Fe（83-87%）和 Pb（76-84%）等重金属的最大去除率通过 和 达到。生物浓缩和迁移因子的值小于 1，这表明重金属从根部向植物地上部分的迁移量较低。这两种植物在体内积累重金属，而生长没有明显减少，对所有存在的金属表现出耐受性。因此，研究结果表明，这些水生植物是从垃圾渗滤液中去除污染负荷的合适候选物。
