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| Properties and Contamination Mechanism of Soil Flooded with Oil-containing Wastewater |
| Received:July 16, 2014 |
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| KeyWord:oil-containing wastewater flooded soil;contamination mechanism;ion composition;microbial community;salt stress |
| Author Name | Affiliation | E-mail | | WANG Tie-yuan | School of Resource and Environment Science, Jilin Agricultural University, Changchun 130118, China | | | DOU Sen | School of Resource and Environment Science, Jilin Agricultural University, Changchun 130118, China | dousen@tom.com | | LIU Lu-jun | Fuyu Oil Production Plant, Petrochina Jilin Oilfield Company, Songyuan 138000, China | | | CUI Jun-tao | School of Resource and Environment Science, Jilin Agricultural University, Changchun 130118, China | | | LIN Chen-ming | School of Resource and Environment Science, Jilin Agricultural University, Changchun 130118, China | | | ZHANG Zi-hao | School of Resource and Environment Science, Jilin Agricultural University, Changchun 130118, China | |
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| Abstract: |
| Oil exploration and production produce large amount of oil-containing wastewater that is usually returned into the underground oil producing zones by water injection. Due to accidents such as water pipeline leakage, however, the soils nearby were flooded by leaked oil-containing wastewater. Such soils seriously affected plant growth. In this study, oil-containing wastewater flooded soils and the adjacent soils with normal crop growth from the Jilin oilfield were used to examine their oil content, ion composition and microbial community. The results show that organic matter content, pH, electric conductivity, sodium adsorption ratio(SAR), total alkalinity(TA), and salt content in oil-containing wastewater flooded soils were higher than those in control soil, contaminated soils showed obvious alkalinization. Compared with the control soil, oil content, the proportions of Na2CO3 and NaHCO3 in salts, and ratios of Na+/K+, Na+/Ca2+ and Na+/Mg2+ were all higher in the contaminated soil, while the microbial population decreased in the contaminated soils. In conclusion, oil-containing wastewater polluted soils through modifying ion composition and microbial community and alkalinizing soils. |
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