Pedosphere 20(1): 96--103, 2010
ISSN 1002-0160/CN 32-1315/P
©2010 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Variations in uptake and translocation of copper, chromium, and nickel among nineteen wetland plant species |
LIU Jian-Guo1 , LI Guang-Hui1, SHAO Wan-Chen1, XU Jia-Kuan2 and WANG De-Ke1 |
1 School of Environmental & Safety Engineering, Jiangsu Polytechnic University, Changzhou 213164 (China);
2 Changzhou Agricultural and Forestry Bureau, Changzhou 213001 (China) |
| ABSTRACT |
| An experiment was carried out to investigate the variations in metal uptake and translocation among 19 wetland plant species in small-scale plots of constructed wetland using artificial wastewater containing 2.0 mg L-1 copper (Cu), 1.0 mg L-1 chromium (Cr), and 2.0 mg L-1 nickel (Ni). More than 97% of Cu, Cr, and Ni were removed from the wastewater by the wetland plant species. There were more than 100-fold differences in the metal accumulation and more than ten-fold differences in the metal concentrations among the 19 plant species. These plants accumulated as high as 8.8% of Cu, 20.5% of Cr, and 14.4% of Ni when they were grown in the wetland soaked with the wastewater. Several plant species were found to be highly capable of accumulating one, two or all the three metals. The results indicated considerable variations in the metal removal abilities through phytoextraction among the 19 wetland plant species. It can be concluded that the selection of appropriate plant species in constructed wetland can be crucial for the improvement of metal removal efficiency of the wetland system. |
| Key Words: constructed wetland, heavy metal, phytoextraction, wastewater treatment |
| Citation: Liu, J. G., Li, G. H., Shao, W. C., Xu, J. K. and Wang, D. K. 2010. Variations in uptake and translocation of copper, chromium, and nickel among nineteen wetland plant species. Pedosphere. 20(1): 96-103. |
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