Different spontaneous plant communities in Sanmen Pb/Zn mine tailing and their effects on mine tailing physico-chemical properties |
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Authors: | Jiang Wang Chong B Zhang Shi S Ke Bao Y Qian |
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Institution: | (1) School of Life Sciences, Taizhou University, Zhejiang, 317000, People’s Republic of China |
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Abstract: | Different plant communities have established spontaneously on Sanmen Pb/Zn mine tailing. The site was inspected and four different
plant communities were identified according to their species composition. To understand the effects of different communities
on mine tailing physico-chemical properties, a community survey was carried out in Sanmen Pb/Zn mine tailing, and the physico-chemical
properties and heavy metal (Cu, Pb, Cd and Zn) distribution of mine tailings were determined. Results showed that there were
four types of communities (I, II, III and IV) in Sanmen Pb/Zn mine tailing. From community I to IV, the number of plant species
and community characteristics (aboveground biomass, underground biomass, coverage and height) consistently increased. Moreover,
the nutrient pool and physico-chemical properties of mine tailing consistently reestablished from community I to IV, while
the total heavy metal content consistently decreased. The contents of residual fractions, Fe–Mn oxide fractions for Pb, Zn,
Cu and Cd and exchangeable fractions for Pb and Zn also consistently decreased. However, the contents of organically bound
fraction had no obvious change from community I to IV. Moreover, the contents of Cu organically bound fraction reversely increased.
Results demonstrate that communities I, II, III and IV should be a progressive community succession. Moreover, along with
the progressive community succession, phytostabilization and phytoextraction of mine tailings are more and more effective. |
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