Rana Vivek, Maiti Subodh Kumar
Restoration Ecology Laboratory, Department of Environmental Science and Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand, 826004, India.
Bull Environ Contam Toxicol. 2018 Jul;101(1):55-60. doi: 10.1007/s00128-018-2354-0. Epub 2018 May 14.
The release of industrial effluents into natural wetlands is a ubiquitous problem worldwide, and phytoremediation could be a viable option for treatment. The present study assessed metal accumulation strategies of three dominant emergent plants [Colocasia esculenta (L.) Schott, Scirpus grossus (L.) f., and Typha latifolia L.] growing in a wetland contaminated with coke-oven effluent. Metals concentration (mg kg) in wetland sediment followed the order Mn (408) > Cu (97) > Co (14.2) > Cr (14) > Cd (2.7). Plant tissues (root and shoot) showed metal-specific accumulation at different extents due to plant response against metal utility or toxicity. Bioconcentration factor (BCF) and translocation factor (TF) of metals in plants revealed Cd and Mn pollution could be remediated through phytoextraction (BCF > 1 and TF > 1); however, Co, Cu, and Cr pollution could be remediated through phytostabilization (BCF > 1 and TF < 1).
向天然湿地排放工业废水是一个全球性普遍存在的问题，植物修复可能是一种可行的处理方法。本研究评估了生长在受焦炉废水污染湿地中的三种优势挺水植物[芋（Colocasia esculenta (L.) Schott）、大藨草（Scirpus grossus (L.) f.）和宽叶香蒲（Typha latifolia L.）]的金属积累策略。湿地沉积物中的金属浓度（mg/kg）顺序为：锰（408）＞铜（97）＞钴（14.2）＞铬（14）＞镉（2.7）。由于植物对金属利用或毒性的反应，植物组织（根和地上部分）在不同程度上表现出金属特异性积累。植物中金属的生物富集系数（BCF）和转运系数（TF）表明，镉和锰污染可通过植物提取修复（BCF＞1且TF＞1）；然而，钴、铜和铬污染可通过植物稳定修复（BCF＞1且TF＜1）。
