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  • Acid-tolerant plant species screened for rehabilitating acid mine drainage sites

    Author(s)
    Ma, Ling
    Rao, Xingquan
    Lu, Ping
    Huang, Shaowei
    Chen, Xiaoyang
    Xu, Zhihong
    Xie, Jun
    Griffith University Author(s)
    Xu, Zhihong
    Year published
    2015
    Metadata
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    Abstract
    Purpose Large areas of land have been impacted by acidic mine drainage. These sites could potentially be re-vegetated for growing energy plants. Conventional phytoremediation method may fail because the pH of some mine drainage and contaminated soils can reach 2.0. Thus, it is necessary to screen acid-tolerant plants as pioneers to rehabilitate those severely acidified areas. Materials and methods In the first phase of this study, seven levels of low pH media were used to estimate the acid-tolerant ranges of three plant species for 1 month. In the second phase, 50 commonly cultured plant species from 17 families, native ...
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    Purpose Large areas of land have been impacted by acidic mine drainage. These sites could potentially be re-vegetated for growing energy plants. Conventional phytoremediation method may fail because the pH of some mine drainage and contaminated soils can reach 2.0. Thus, it is necessary to screen acid-tolerant plants as pioneers to rehabilitate those severely acidified areas. Materials and methods In the first phase of this study, seven levels of low pH media were used to estimate the acid-tolerant ranges of three plant species for 1 month. In the second phase, 50 commonly cultured plant species from 17 families, native in Guangdong Province of China or introduced from Australia, were evaluated for acid tolerance at three pH levels which were chosen based on results in the first phase. Results and discussion We found that Acacia auriculiformis could survive and nodulate at pH ≥2.0, Acacia confusa and Melaleuca armillaris could survive at pH ≥2.5 but A. confusa nodulate at pH >3.5. In the second phase, 12 plant species, in addition to A. auriculiformis, can survive in pH 2.0 media. Conclusions No family or genus commonality in acid tolerance was found. Two of these tolerant species, i.e., A. auriculiformis and Jatropha carcas, could potentially be planted as an economically and ecologically viable option for acid mine remediation due to their potential function as biofuel feedstock.
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    Journal Title
    Journal of Soils and Sediments
    Volume
    15
    Issue
    5
    DOI
    https://doi.org/10.1007/s11368-015-1128-0
    Subject
    Earth sciences
    Environmental sciences
    Other environmental sciences not elsewhere classified
    Agricultural, veterinary and food sciences
    Publication URI
    http://hdl.handle.net/10072/141073
    Collection
    • Journal articles

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