Mixturing of local manganese mine wastelands improved native tree species potential phytoremedation performance in Hunan, China
Abstract
The planting of trees on mine wastelands is an effective, long-term technique for phytoremediation of heavy metals contaminated wastes. The selection of suitable tree species for phytoremediation is of key factor for... [ view full abstract ]
The planting of trees on mine wastelands is an effective, long-term technique for phytoremediation of heavy metals contaminated wastes. The selection of suitable tree species for phytoremediation is of key factor for successful restoration of manganese mine wastelands. At the same time, finding the appropriate proportion of the mixturing local manganese mine wastelands has become the key technical measures of improving plant survival rate. In this study, a pot experiment with seedlings of Koelreuteria paniculata, Schima superba, and Pinus massoniana under six treatments of local mine wastes was designed to determine effects of mixturing local manganese mine wastelands on phytoremediation and possible phytoremediation mechanism of different tree species. Results showed that P. massoniana was not suitable for planting on manganese mine wastelands for its low survival rate. Both K. paniculata and S. superba had almost the same survival rate except that no survival of the former under the mine sludge treatments. The tree species of S. superba has different adaptation strategy from K. paniculata in terms of bioaccumulation coefficient factor and translocation factor. Mixturing of mine sludge and mine tailings can effectively improve the survival rates of seedlings of K. paniculata and S. superba. The improved survival rate is closely related with improving soil pH and soil texture of mixturing of mine sludge and mine tailings. Both S. superba and K. paniculata are is suited to restore manganese mine wastelands by mixing the mine sludge with local mine tailings.
Authors
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Zhihong Huang
(a. National Engineering Laboratory of Applied Ecological Technology for Forestry in Southern China, Changsha, Hunan, 410004, China. b. Faculty of Life Science and Technology, Central South University of Forestry and Technology.)
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Shu Xiao
(Faculty of Life Science and Technology, Central South University of Forestry and Technology, Changsha, Hunan, 410004, China.)
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Qinying Cao
(Faculty of Life Science and Technology, Central South University of Forestry and Technology, Changsha, Hunan, 410004, China.)
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Wenhua Xiang
(Faculty of Life Science and Technology, Central South University of Forestry and Technology, Changsha, Hunan, 410004, China.)
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Xiangwen Deng
(Faculty of Life Science and Technology, Central South University of Forestry and Technology, Changsha, Hunan, 410004, China.)
Topic Area
Please tick the most appropriate topic for your submission: Soil Remediation
Session
PS » Poster Session Available from 14th - 17th August (16:45 - Wednesday, 17th August, Arts/Science Concourse)
