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| Effect of fertilization on remediation of petroleum contaminated soil by Sudangrass |
| Received:August 02, 2015 |
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| KeyWord:N, P and K fertilizer;Sudangrass;petroleum hydrocarbons;aromatic hydrocarbons;alkanes |
| Author Name | Affiliation | E-mail | | HAN Tao | Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China | | | ZHAO Zhi-peng | Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China | | | WANG Ying-ying | Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China | wangyy@nankai.edu.cn |
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| Abstract: |
| In the present study, the effect of fertilization on the remediation of petroleum contaminated soil by Sudangrass was investigated in a pot experiment. Growth of Sudangrass and removal and components of petroleum hydrocarbons were examined. Results showed that growing Sudangrass significantly decreased petroleum hydrocarbon content in the soil. After 90 day of the experiment, the removal rate of petroleum hydrocarbons was 10.31% greater under fertilization(up to 54.20%) than under the un-fertilized control. Fertilization also promoted the growth of Sudangrass. The shoot height(up to 23.07 cm), shoot dry weight(up to 0.45 g), and root dry weight(up to 0.08 g) of Sudangrass under fertilization were all significantly higher than those under the un-fertilized control. The removal rates of aromatic hydrocarbons(16 PAHs, up to 21.35%) and alkanes(C8~C40, up to 51.94%) were respectively 7.39% and 6.44% greater under fertilized conditions than under the control. Significant differences were observed in the removal rates between alkanes and aromatic hydrocarbons. The removal efficiencies of alkanes were greater than those of aromatic hydrocarbons under both fertilized and control conditions. Phenanthrene, pyrene and benzo[a] anthracene were the main components of the aromatic hydrocarbons, representing more than 80% of the total aromatic hydrocarbons in the soil. Our results demonstrate that fertilization could promote the remediation of petroleum contaminated soil by Sudangrass. |
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