摘要
基于黄河三角洲生态区内部分油田生产区石油污染土壤的调查取样,研究了土壤的石油污染特性及其与理化性质的关系。结果表明,油田区土壤受到了不同程度的石油污染,溢油处油泥含油率最高达6230mg/kg。石油污染土壤总有机碳(TOC)含量与含油率呈正相关关系,研究区TOC为0.22%～1.14%,其中老油井含量大于新油井。但值得注意的是本次研究发现部分石油污染区域土壤的TOC反而低于未污染区,这可能与碱蓬的覆盖状况有关。石油污染对土壤的全氮含量没有显著影响,所研究的石油生产区土壤总氮含量为207.74～870.20mg/kg,未受石油污染的生态核心区该值为591.02～938.28mg/kg。土壤有机碳、全氮及C/N随土壤深度的增加皆呈下降趋势,土壤各层中有机碳和全氮含量的变化趋势基本一致,呈极显著线性相关。石油烃污染导致石油污染土壤中C、N比例严重失调,因此在进行石油污染土壤修复时需要添加相应的N营养元素来增强土壤中微生物的营养来增强土壤中微生物的活性,加快其对石油的分解。
The contamination characteristics of oil polluted soils were analyzed by investigating and sampling in different area of Yellow River Delta Swamp,China,and its relationship with the physico-chemical properties was also investigated in detail in this research.The results indicated that the soil in Yellow River Delta Swamp were polluted by petroleum,with the highest oil content reaching 6 230 mg/kg for sludge at spilled oil region.It is interesting that the TOC of some petroleum-contaminated soil region lower than that of uncontaminated area,which may be related to the coverage status of Suaeda salsa.Total nitrogen content of polluted soil and in Yellow River Delta is 207.74～870.20 mg/kg,in comparison with that of ecological core areas （591.02～938.28 mg/kg）.The results showed that soil organic carbon,total nitrogen and C/N ratio were decreased gradually with increasing soil depth.Soil organic carbon was positively correlated to oil contents on the whole.The results indicated that addition of N was needed in bioremediation of petroleum contaminated soil.
出处
《水土保持学报》
CSCD
北大核心
2010年第2期214-217,共4页
Journal of Soil and Water Conservation
基金
中国科学院优秀博士学位论文
院长奖获得者科研启动专项资金(AJ0809xx-035
AJ0809xx-036)
国家海洋局近岸海域生态环境重点实验室开放基金(200907)
The CAS/SAFEA International Partnership Program for Creative ResearchTeams
国家自然科学基金(40806048)
关键词
石油污染
理化性质
土壤生物修复
黄河三角洲生态区
petroleum contamination
physico-chemical properties of soil
soil bioremediation
ecological zone of Yellow River Delta
