Khatun Amina, Pal Sandipan, Mukherjee Aloke Kumar, Samanta Palas, Mondal Subinoy, Kole Debraj, Chandra Priyanka, Ghosh Apurba Ratan
Department of Environmental Science, University of Burdwan, Burdwan, India.
Department of Environmental Science, Aghorekamini Prakashchandra Mahavidyalaya, Hooghly, India.
Environ Health Toxicol. 2016 Sep 8;31:e2016021. doi: 10.5620/eht.e2016021. eCollection 2016.
The present study analyzes metal contamination in sediment of the East Kolkata Wetlands, a Ramsar site, which is receiving a huge amount of domestic and industrial wastewater from surrounding areas. The subsequent uptake and accumulation of metals in different macrophytes are also examined in regard to their phytoremediation potential.
Metals like cadmium (Cd), copper (Cu), manganese (Mn), and lead (Pb) were estimated in sediment, water and different parts of the macrophytes and .
The concentration of metals in sediment were, from highest to lowest, Mn (205.0±65.5 mg/kg)>Cu (29.9±10.2 mg/kg)>Pb (22.7±10.3 mg/kg)>Cd (3.7±2.2 mg/kg). The phytoaccumulation tendency of these metals showed similar trends in both native aquatic macrophyte species. The rate of accumulation of metals in roots was higher than in shoots. There were strong positive correlations (<0.001) between soil organic carbon (OC) percentage and Mn (r =0.771), and sediment OC percentage and Pb (r=0.832). Cation exchange capacity (CEC) also showed a positive correlation (<0.001) with Cu (r=0.721), Mn (r=0.713), and Pb (r=0.788), while correlations between sediment OC percentage and Cu (r=0.628), sediment OC percentage and Cd (r=0.559), and CEC and Cd (r=0.625) were significant at the <0.05 level.
Bioaccumulation factor and translocation factors of these two plants revealed that was comparatively more efficient for phytoremediation, whereas phytostabilization potential was higher in .
本研究分析了拉姆萨尔湿地——加尔各答东部湿地沉积物中的金属污染情况，该湿地正接收来自周边地区的大量生活和工业废水。同时还考察了不同大型植物对金属的后续吸收和积累情况及其植物修复潜力。
对沉积物、水和大型植物的不同部位中的镉（Cd）、铜（Cu）、锰（Mn）和铅（Pb）等金属进行了估算。
沉积物中金属浓度由高到低依次为：锰（205.0±65.5毫克/千克）>铜（29.9±10.2毫克/千克）>铅（22.7±10.3毫克/千克）>镉（3.7±2.2毫克/千克）。这两种本地水生大型植物物种对这些金属的植物积累趋势相似。金属在根部的积累速率高于地上部分。土壤有机碳（OC）百分比与锰（r = 0.771）、沉积物OC百分比与铅（r = 0.832）之间存在强正相关（<0.001）。阳离子交换容量（CEC）与铜（r = 0.721）、锰（r = 0.713）和铅（r = 0.788）也呈正相关（<0.001），而沉积物OC百分比与铜（r = 0.628）、沉积物OC百分比与镉（r = 0.559）以及CEC与镉（r = 0.625）之间的相关性在<0.05水平上显著。
这两种植物的生物积累因子和转运因子表明，[此处原文缺失具体植物名称]相对更适合植物修复，而[此处原文缺失具体植物名称]的植物稳定潜力更高。
