TY - JOUR
T1 - Degradation of phenanthrene and pyrene in spiked soils by single and combined plants cultivation
AU - Cheema, Sardar Alam
AU - Imran Khan, Muhammad
AU - Shen, Chaofeng
AU - Tang, Xianjin
AU - Farooq, Muhammad
AU - Chen, Lei
AU - Zhang, Congkai
AU - Chen, Yingxu
N1 - Funding Information:
This work was supported by the Program for Changjiang Scholars and Innovative Research Team in University ( IRT0536 ), National Natural Science Foundation of China ( 20607019 and 40590392 ) and Zhejiang Province Bureau of Science and Technology ( 2007C23037 ). The authors would like to specially acknowledge Mr. Liu Lei and other members in our group for their great assistance and cooperation during the research.
PY - 2010/5
Y1 - 2010/5
N2 - The present study was conducted to investigate the capability of four plant species (tall fescue, ryegrass, alfalfa, and rape seed) grown alone and in combination to the degradation of phenanthrene and pyrene (polycyclic aromatic hydrocarbons, PAHs) in spiked soil. After 65 days of plant growth, plant biomass, dehydrogenase activity, water-soluble phenolic (WSP) compounds, plant uptake and accumulation and residual concentrations of phenanthrene and pyrene were determined. Our results showed that presence of vegetation significantly enhanced the dissipation of phenanthrene and pyrene from contaminated soils. Higher degradation rates of PAHs were observed in the combined plant cultivation (98.3-99.2% phenanthrene and 88.1-95.7% pyrene) compared to the single plant cultivation (97.0-98.0% phenanthrene and 79.8-86.0% pyrene). Contribution of direct plant uptake and accumulation of phenanthrene and pyrene was very low compared to the plant enhanced dissipation. By contrast, plant-promoted biodegradation was the predominant contribution to the remediation enhancement. The correlation analysis indicates a negative relation between biological activities (dehydrogenase activity and WSP compounds) and residual concentrations of phenanthrene and pyrene in planted soils. Our results suggest that phytoremediation could be a feasible choice for PAHs contaminated soil. Moreover, the combined plant cultivation has potential to enhance the process.
AB - The present study was conducted to investigate the capability of four plant species (tall fescue, ryegrass, alfalfa, and rape seed) grown alone and in combination to the degradation of phenanthrene and pyrene (polycyclic aromatic hydrocarbons, PAHs) in spiked soil. After 65 days of plant growth, plant biomass, dehydrogenase activity, water-soluble phenolic (WSP) compounds, plant uptake and accumulation and residual concentrations of phenanthrene and pyrene were determined. Our results showed that presence of vegetation significantly enhanced the dissipation of phenanthrene and pyrene from contaminated soils. Higher degradation rates of PAHs were observed in the combined plant cultivation (98.3-99.2% phenanthrene and 88.1-95.7% pyrene) compared to the single plant cultivation (97.0-98.0% phenanthrene and 79.8-86.0% pyrene). Contribution of direct plant uptake and accumulation of phenanthrene and pyrene was very low compared to the plant enhanced dissipation. By contrast, plant-promoted biodegradation was the predominant contribution to the remediation enhancement. The correlation analysis indicates a negative relation between biological activities (dehydrogenase activity and WSP compounds) and residual concentrations of phenanthrene and pyrene in planted soils. Our results suggest that phytoremediation could be a feasible choice for PAHs contaminated soil. Moreover, the combined plant cultivation has potential to enhance the process.
KW - Combined plant cultivation
KW - PAHs
KW - Phenanthrene
KW - Phytoremediation
KW - Pyrene
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U2 - 10.1016/j.jhazmat.2009.12.044
DO - 10.1016/j.jhazmat.2009.12.044
M3 - Article
C2 - 20079966
AN - SCOPUS:77949568451
SN - 0304-3894
VL - 177
SP - 384
EP - 389
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
IS - 1-3
ER -