Abstract

The contrast study of the in-situ remediation methods of the petroleum-contaminated soil

Author(s): Guo Xiaojing, Chen Li, Zhang Sheng, Chen Jiang

The Contrast study of the in-situ remediation methods of the petroleumcontaminated soilwas carried out in ZhongyuanOilfield. Three remediation methods, plant-microbialmethod,microbialmethod and plantmethod,were applied to identify the degradation effect of petroleum. The highly efficient petroleum-degrading bacteria screened from the study area and the rye grass is chosen as remediation plant according to the experiment in laboratory. The results showed that the number of petroleum-degraded microbial after remediation is more than the situation before remediation. That is because the microbial liquid and the rhizosphere effect of plants can promote the growth and propagation ofmicrobial. The plant-microbial method is optimal for the petroleum degradation. The petroleum was degraded fully in the remediation layer and a little part of nutrients leaked into the layer belowthe remediation layer. In addition, the soil temperature, oxygen content and nutrients should be regulated to promote the degradation of petroleum. The in-situ plant-microbial method provides more economic and efficient technical methods for the remediation of contaminated soil and has profound practical significance for the sustainable development of human beings