Laboratory Study Of Arsenic Uptake And Phytoremediation Potential Of Three Aquatic Macrophytes Of Meghalaya, India

摘要

Abstract: Laboratory experiments were performed to evaluate the As uptake capacity by three aquatic macrophytes (Scripus mucronatus, Rotala rotundifolia and Myriophyllum intermedium). The selected macrophytes were transferred to the laboratory containing nutrient solution and working As standard solutions of different concentrations (1.0, 2.0, 4.0, 8.0 and 16 mg L-1) and harvested at regular time interval of 2, 4, 6, 8 and 10 days. The As uptake by these macrophytes showed a linear relationship for S. mucronatus, R. rotundifolia and M. intermedium with the exposure time period (2'10 d). As accumulation in the plant parts was higher in the roots for S. mucronatus but reverse in the case of R. rotundifolia and M. intermedium. The maximum bioconcentration factor (BCF) values were found at the 8th day in all the three aquatic macrophytes and translocation factor (TF) was at the 8th day for S. mucronatus and R. rotundifolia and at the 6th day for M. intermedium respectively. The experimental results demonstrated that these three aquatic macrophytes have a phytoremediation potential for removing As from As -contaminated water.