Laboratory of Plant Physiology and Biochemistry, Post Graduate Department of Botany, Utkal University, Bhubaneswar, 751004 Orissa, India.
Environ Monit Assess. 2013 May;185(5):4347-59. doi: 10.1007/s10661-012-2873-9. Epub 2012 Sep 20.
The present investigation aims to assess the phytoremediation potential of six aquatic macrophytes, viz. Eichhornia crassipes, Hydrilla verticillata, Jussiaea repens, Lemna minor, Pistia stratiotes and Trapa natans grown in paper mill effluent of JK Paper mill of Rayagada, Orissa, for remediation of heavy metals. The experiment was designed in pot culture experiments. Assessment of physico-chemical parameters of paper mill effluent showed significant decrease in pH, conductivity, total dissolved solids, total suspended solids, chlorine, sulphur, biological and chemical oxygen demand after growth of macrophytes for 20 days. Phytoremediation ability of these aquatic macrophytic species for copper (Cu) and mercury (Hg) was indicated by assessing the decrease in the levels of heavy metals from effluent water. Maximum reduction (66.5 %) in Hg content of untreated paper mill effluent was observed using L. minor followed by T. natans (64.8 %). L. minor showed highest reduction (71.4 %) of Cu content from effluent water followed by E. crassipes (63.6 %). Phytoextraction potential of L. minor was remarkable for Hg and Cu, and bioaccumulation was evident from bioconcentration factor values, i.e. 0.59 and 0.70, respectively. The present phytoremediation approach was considered more effective than conventional chemical treatment method for removing toxic contaminants from paper mill effluent.
本研究旨在评估 6 种水生植物（水葫芦、水蕴草、节节菜、浮萍、凤眼蓝和菱）在奥里萨邦雷亚格达 JK 造纸厂造纸厂废水处理中的重金属修复潜力。实验采用盆栽试验设计。造纸厂废水理化参数评估表明，水生植物生长 20 天后，pH 值、电导率、总溶解固体、总悬浮固体、氯、硫、生物和化学需氧量均显著下降。通过评估重金属从废水中的去除程度，这些水生植物对铜（Cu）和汞（Hg）的修复能力。用浮萍处理未处理的造纸厂废水，Hg 含量最大减少（66.5%），其次是菱（64.8%）。浮萍对废水中 Cu 含量的去除率最高（71.4%），其次是水葫芦（63.6%）。浮萍对 Hg 和 Cu 的植物提取潜力显著，生物浓缩因子值表明生物积累明显，分别为 0.59 和 0.70。与传统的化学处理方法相比，这种植物修复方法被认为更有效地去除造纸厂废水中的有毒污染物。
