Efficiency of Pb, Zn, Cd, and Mn Removal from Karst Water by Eichhornia crassipes
Open Access
- 25 July 2020
- journal article
- research article
- Published by MDPI AG in International Journal of Environmental Research and Public Health
- Vol. 17 (15), 5329
- https://doi.org/10.3390/ijerph17155329
Abstract
This study experimentally investigated heavy metal removal and accumulation in the aquatic plant Eichhornia crassipes. Pb, Zn, Cd, and Mn concentrations, plant morphology, and plant functional groups were analyzed. Eichhornia crassipes achieved high removal efficiency of Pb and Mn from karst water (over 79.5%), with high proportion of Pb, Zn, and Cd absorption occurring in the first eight days. The highest removal efficiencies were obtained at initial Pb, Zn, Cd, and Mn concentrations of 1 mg/L, 2 mg/L, 0.02 mg/L, and 0.2 mg/L, respectively. Eichhornia crassipes exhibited a high bioconcentration factor (Mn = 199,567 > Pb = 19,605 > Cd = 3403 > Zn = 1913) and a low translocation factor (42−, O-H, C-H, and C-O played different roles during uptake, which led to different removal and accumulation effects.Funding Information
- National Natural Science Foundation of China (41571203)
- Chinese Academy of Geological Sciences (YYWF201725)
- China Geological Survey (DD20190343)
- China Scholarship Council (No.201908110325)
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