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| Potential of ornamental plants for remediating soil polluted with cadmium |
| Received:November 15, 2015 |
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| KeyWord:Cd;polluted soil;ornamental plant;phytoremediation |
| Author Name | Affiliation | E-mail | | ZENG Peng | Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha 410083, China | | | CAO Xia | Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha 410083, China | | | GUO Zhao-hui | Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha 410083, China | zhguo@csu.edu.cn | | XIAO Xi-yuan | Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha 410083, China | | | LIU Ya-nan | Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha 410083, China | | | LIANG Fang | Institute of Environmental Engineering, School of Metallurgy and Environment, Central South University, Changsha 410083, China | |
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| Abstract: |
| Under greenhouse condition, the tolerance and accumulation characteristics for ornamental plants of 10 species grown on Cd contaminated soil, including Cinnamomum camphora, Sabina chinensis, Platycladus orientalis, Nerium indicum, Viburnum odoratissimum, Osmanthus fragrans, Loropetalum chinense, Euonymus japonicus, Ligustrum vicaryi and Gardenia Ellis, were studied. Three levels of Cd in polluted soil were designed, which is the background level of 3.6 mg·kg-1(CK), the content of 9.6 mg·kg-1(T1) and 24.6 mg·kg-1(T2) with addition of external cadmium, respectively. The results showed that the biomass of roots, stems, leaves and total plant among Sabina chinensis, Platycladus orientalis and Osmanthus fragrans was slightly significant difference(P>0.05) compared with CK treatment under T1 and T2 treatment. When the content of Cd in soils were from 3.6 to 24.6 mg·kg-1, Platycladus orientalis, Viburnum odoratissimum, Osmanthus fragrans and Euonymus japonicus could photosynthesize regularly, and the content of malondialdehyde in leaves of Cinnamomum camphora, Platycladus orientalis, Viburnum odoratissimum, Osmanthus fragrans, Loropetalum chinense, Euonymus japonicus and Ligustrum vicaryi were slightly changed. The accumulation capacity of Cd in Viburnum odoratissimum and the transferring coefficient of Cd to aboveground of Cinnamomum camphora was relatively higher compared with the other tested plants. According to the hierarchical cluster analysis based on Cd bioaccumulation factors of tested plants, Sabina chinensis, Nerium indicum and Viburnum odoratissimum can serve for phytoremediation and ameliorate the landscape of Cd contaminated soil. Loropetalum chinense, Euonymus japonicas, Cinnamomum camphora, Osmanthus fragrans, Platycladus orientalis and Ligustrum vicaryi is helpful for stabilization of Cd in contaminated soil. |
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