Salix integra Combined with Pseudomonas aeruginosa to Restore Diesel Contaminated Soils
Publication: Journal of Environmental Engineering
Volume 143, Issue 9
Abstract
The soil remediation using Salix integra combined with oil-degraded microorganism Pseudomonas aeruginosa was conducted to investigate the effect on degradation of diesel () in diesel-contaminated soil. The diesel contents in Salix integra tissue, and the activity of soil microorganisms and enzymes’ (dehydrogenase, catalase, and polyphenol oxidase) activities in rhizosphere soils were also assessed in different treatments. The results showed that the treatment of Salix integra combined with Pseudomonas aeruginosa displayed the highest removal efficiency (67.46%). Inoculating Pseudomonas aeruginosa could decrease the content of diesel in Salix integra’s tissues; however, there was no significant difference. Moreover, inoculating Pseudomonas aeruginosa significantly increased the rhizospheric microbial activity by 5.1–19.22% compared with the one only planting Salix integra. In addition, a close correlation between diesel removal ratios and the microbial activity was observed (, ) in the Salix integra combined with Pseudomonas aeruginosa treatment. The activities of dehydrogenase were also significantly correlated with the microbial activity (, ). All of the previous results confirmed that inoculating Pseudomonas aeruginosa could enhance the dissipation of diesel oil in soil. Thus, the composite system could be reasonably used to restore the ecological environment of organic contaminated soils.
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Acknowledgments
The work was funded by the National Natural Science Foundation of China (No. 41373097), and Program for Innovative Research Team in University (No. IRT13078).
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Published In
Journal of Environmental Engineering
Volume 143 • Issue 9 • September 2017
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©2017 American Society of Civil Engineers.
History
Received: Jun 28, 2016
Accepted: Dec 22, 2016
Published online: Apr 10, 2017
Published in print: Sep 1, 2017
Discussion open until: Sep 10, 2017
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