土壤生物修复过程中石油类组分变化规律的研究

Study on the Change Law of Petroleum Component in Soil Bioremediation

[目的]研究土壤生物修复过程中石油类组分的变化规律。[方法]采用微生物修复和植物修复法对油污土壤进行修复,通过分析土壤生物修复过程中石油类含量及组分的变化来评价污染土壤的生物修复效果。[结果]随着修复时间的延长,土壤中矿物油可降到3 000 mg/kg以下;土壤中石油类总烃所占比例大幅下降,而沥青质所占比例明显上升;修复前土壤中石油类以C24为主,微生物修复后(41 d)主碳峰为C29,植物修复后(139 d)主碳峰为C17和C18。[结论]该研究为今后油污土壤生物修复效果的评价提供了科学依据。

[Objective] Our study was carried out to research the change law of petroleum component in soil bioremediation.[Method] By means of microbial remediation and plant remediation to restore oily soil,the bioremediation effect of oily soil was assessed based on analysis on the change of petroleum content and component in soil bioremediation.[Result] With the increase of remediation time,mineral oil in soil decreased to below 3 000 mg/kg;the proportion of total hydrocarbon in petroleum went down greatly,while asphaltene proportion in petroleum went up obviously;the main carbon peak of petroleum in soil was C24 before bioremediation and C29 after microbial remediation（41 d）,while it changed into C17 and C18 after plant remediation（139 d）.[Conclusion]Our study could provide scientific reference for the assessment on the bioremediation effect of oily soil in the further.