Effect of the salt contentin soil on bioremediation of soil by contaminated petroleum

QIN Xiao, LI Desheng,TANG Jingchun, ZHANG Qingmin,GAO Jing

Journal of Nanjing Forestry University (Natural Sciences Edition） ›› 2013, Vol. 37 ›› Issue (02) : 108-112.

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南京林业大学学报（自然科学版）
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Journal of Nanjing Forestry University (Natural Sciences Edition） ›› 2013, Vol. 37 ›› Issue (02) : 108-112. DOI: 10.3969/j.issn.1000-2006.2013.02.019

Effect of the salt contentin soil on bioremediation of soil by contaminated petroleum

  • QIN Xiao1, LI Desheng1*,TANG Jingchun2, ZHANG Qingmin2,GAO Jing1
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Abstract

This study attempts to analyze the effects of different concentrations of soil salinityon bioremediation of petroleum-contaminated soil using biostimulation appended bioaugmentation or not. The saline-alkali soil collected from Tianjin Dagang oilfield and leached several times by analog field irrigation. The results showed that both the bioremediationcould reduce the soil salt content and raise oil petroleum hydrocarbon degradation rate. When soil salt content on the degree of 0.22%, biostimulation appended bioaugmentation could raise oil degradation rate to 24.98% after 3 days remediation.When soil salt content was on the degree of 0.01%, after 28 days biostimulation, the degradation rate by using biostimulation appended bioaugmentation was 1.1 times higher than that using pure biostimulation. The degradation rate of the low salt content soil was 1.22 times higher than that of the high salt content soilunder biostimulation appended bioaugmentation treatment. As the incubation time extended, soil dehydrogenase activity gradually increased, while soil pH value declined and soil salinization improved. As soil environment improved, the species and amounts of microorganism increased.

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QIN Xiao, LI Desheng,TANG Jingchun, ZHANG Qingmin,GAO Jing. Effect of the salt contentin soil on bioremediation of soil by contaminated petroleum[J]. Journal of Nanjing Forestry University (Natural Sciences Edition）. 2013, 37(02): 108-112 https://doi.org/10.3969/j.issn.1000-2006.2013.02.019

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