含盐量对石油污染土壤生物修复的影响  

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

作　　者：秦晓[1] 李德生[1] 唐景春[2] 张清敏[2] 高晶[1] 

机构地区：[1]天津理工大学环境科学与安全工程学院,天津300384 [2]南开大学环境科学与工程学院,天津300071

出　　处：《南京林业大学学报（自然科学版）》2013年第2期108-112,共5页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：环境污染过程与基准教育部重点实验室开放基金项目;国家高技术研究发展计划(2007AA061201);中国科学院知识创新工程项目(kzcx1-yw-06-03)

摘　　要：模拟野外漫灌洗盐并控制洗盐次数得到不同含盐量的土壤,比较单纯生物刺激、生物刺激加生物强化处理对不同含盐量的石油污染土壤的修复效果。结果表明:无论是单纯的生物刺激,还是生物刺激加生物强化处理下,土壤含盐量均有一定程度的降低,可有效提高石油烃的降解率。当土壤含盐量为0.22%(质量分数)时,添加4%菌剂修复第3天时,石油烃降解率可达24.98%;当土壤含盐量为0.01%时,生物刺激加生物强化处理28 d后石油烃的降解率是单纯生物强化的1.1倍;低含盐量添加4%菌剂处理下土壤石油烃降解率是高含盐量加4%菌剂处理的1.22倍。各处理下土壤脱氢酶活性随着培养时间逐渐增强,pH则随着培养时间有所下降,土壤盐碱性得到改良;土壤环境得到改善,微生物的种类及数量增加。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.

关 键 词：石油污染土壤 生物修复 土壤含盐量 生物刺激 生物强化 

分 类 号：X74[环境科学与工程—环境工程] X53