TY - JOUR
T1 - Interaction of Cd/Zn hyperaccumulating plant (Sedum alfredii) and rhizosphere bacteria on metal uptake and removal of phenanthrene
AU - Li, W. C.
AU - Wong, M. H.
N1 - Funding Information:
Financial support from the Research Grants Council of the University Grants Committee of Hong Kong (CERG: HKBU 2181/03M; Area of Excellence: CityU/AoE/03-04/02) is greatly acknowledged.
PY - 2012/3/30
Y1 - 2012/3/30
N2 - The effects of bacteria (Burkholderia cepacia) on plant growth, metal uptake, tolerance index and phenanthrene degradation by a hyperaccumulating plant (Sedum alfredii) were investigated. It was found that inoculation of bacteria did not enhance plant growth and metal uptake; while both metal translocation factor (up to 84% for Cd and 42% for Zn) and tolerance index (up to 23.2% for shoot and 72% for root) were significantly increased. In addition, inoculation of bacteria also alleviated the reductions of bioaccumulation factor and phytoextraction efficiency of As, Cu and Zn with the increasing proportions of polluted soil applied, while they were even increased for Cd and Pb (up to 31.2 and 124%, respectively). Up to 96.3% of phenanthrene was removed in the treatment with both plant and bacteria at the end of the experiment. A positive correlation between metal and P accumulation in plants was observed, it is suggested that high P uptake is directly involved in metal detoxification and leading to an increased P requirement. With the assistance of bacteria, S. alfredii could be able to withstand higher metal concentrations and it could also provide a practical tool for phytoremediation.
AB - The effects of bacteria (Burkholderia cepacia) on plant growth, metal uptake, tolerance index and phenanthrene degradation by a hyperaccumulating plant (Sedum alfredii) were investigated. It was found that inoculation of bacteria did not enhance plant growth and metal uptake; while both metal translocation factor (up to 84% for Cd and 42% for Zn) and tolerance index (up to 23.2% for shoot and 72% for root) were significantly increased. In addition, inoculation of bacteria also alleviated the reductions of bioaccumulation factor and phytoextraction efficiency of As, Cu and Zn with the increasing proportions of polluted soil applied, while they were even increased for Cd and Pb (up to 31.2 and 124%, respectively). Up to 96.3% of phenanthrene was removed in the treatment with both plant and bacteria at the end of the experiment. A positive correlation between metal and P accumulation in plants was observed, it is suggested that high P uptake is directly involved in metal detoxification and leading to an increased P requirement. With the assistance of bacteria, S. alfredii could be able to withstand higher metal concentrations and it could also provide a practical tool for phytoremediation.
KW - Acid phosphatase
KW - Burkholderia cepacia
KW - Dehydrogenase
KW - PAHs
KW - Phytoextraction efficiency
KW - Sedum alfredii
KW - Tolerance index
KW - Translocation factor
UR - http://www.scopus.com/inward/record.url?scp=84862820898&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2012.01.055
DO - 10.1016/j.jhazmat.2012.01.055
M3 - Journal article
C2 - 22309655
AN - SCOPUS:84862820898
SN - 0304-3894
VL - 209-210
SP - 421
EP - 433
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
ER -