Pedosphere 16(1): 131--136, 2006
ISSN 1002-0160/CN 32-1315/P
©2006 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Heavy metal accumulation in plants on Mn Mine tailings |
LIU Yun-Guo1 , ZHANG Hui-Zhi2, ZENG Guang-Ming1, HUANG Bao-Rong1 and LI Xin1 |
1 College of Environmental Science and Engineering, Hunan University, Changsha 410082 (China). E-mail: liuyunguo@hnu.cn
2 Irestitute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China) |
| ABSTRACT |
| The Xiangtan Manganese (Mn) Mine in the middle of Hunan Province, China, has been mined since 1913 with mine tailings including excavated wastes, wastewater, and smelting wastes. A survey was conducted on the Mn mine tailing soils and eight plants on the Mn mine tailings. The concentrations of soil Mn, Pb, and Cd and the metal-enrichment traits of these eight plants were analyzed simultaneously. Exceptionally high concentrations of these three metals were found in the soils, especially on the tailing dam. Each plant investigated in this study accumulated the three heavy metals, but no hyperaccumulator of these metals was found. However, analysis indicated that Poa pratensis Linn., Gnaphalium affine D. Don, Pteris vittata L., Conyza canadensis (L.) Cronq., and Phytolacca acinosa Roxb. possessed specially good metal-enrichment and metal-tolerant traits. P. pratensis, G. affine, and P. vittata were Pb-tolerant plants; and C. canadensis, P. pratensis, and G. affine were Cd-tolerant plants. P. acinosa had a great tolerance to Mn. and it was a valuable plant for on-site phytoremediation. Phragmites communis Trin. was found to have high metal tolerance and economic benefit as a raw material for paper and should be considered for soil remediation. G. affine and C. canadensis had excessive accumulation of Mn and could be useful in phytoremediation. However, although P. pratensis was a good accumulator, it was not a suitable plant for soil remediation because its biomass was too little. |
| Key Words: heavy metal, metal-tolerant plant, Mn mine tailings, phytoremediation, soil |
| Citation: Liu, Y. G., Zhang, H. Z., Zeng, G. M., Huang, B. R. and Li, X. 2006. Heavy metal accumulation in plants on Mn Mine tailings. Pedosphere. 16(1): 131-136. |
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