摘要
为修复陕北黄土区石油污染土壤，采用优化原位微生物菌群辅以物理和化学方法与地质环境相结合的微生态技术，在试验区均匀加入了3％的优化菌群制剂，选择优化出的菌群初步鉴定主要有：假单胞菌属（Pseudomonas）、微球菌属（Micrococcus）、放线菌属（Actinomayces）、真菌类的青霉属（Penicillium）、曲霉属（Aspergillus）等，调控了土壤温度、含水量、氧和营养物质等，进行了土壤中石油的降解与修复试验研究。结果表明，在试验区土壤中人为添加石油平均含量在2318．5mg·kg^-1时，经过11～32d原位微生态修复技术的修复，土壤中的石油含量降解可达68．47％～84．30％，而对照区土壤中人为添加的石油含量变化不大，降解率基本在10％以内，说明在自然条件下土壤中石油降解是缓慢的。这个试验验证了地质微生态修复技术在陕北黄土区土壤石油污染修复的有效性，探索了推广应用的可行性。
In order to remediate oil contaminated soil in loess region of North Shaanxi Province, micro-ecological techniques of optimized insitu microbial communities and physical chemistry methods combined with geo-environmental factors were used for experimental studies on oil degradation and polluted soil remediation. In this experiment, 3% optimized microbial populations, which were primarily identified as Pseudomonas, Micrococcus, Actinomayces, Penicillium and Aspergillus, were added into the experimental plots, and soil temperature（keep soil temperature above 25 ℃ ）, moisture content （keep soil moisture content about 20% ）, oxygen and other nutriments （control soil N, P, S, K, Ca, Mg, Fe contents according to shares ）were adjusted. The results of the experiment showed that oil with average contents of 2 318.5 mg· kg^-1 added artificially into soil in the experimental plots can reduce by 68.47% to 84.30% after the in-situ enhanced microbial ecological remediation for 11 to 32 days, whereas oil added artificially into soil in the reference plot varied little in content of oil, and rate of oil degradation varied within 10%, which suggested that oil degradation in soil under natural conditions was slow. This experiment demonstrated the effectiveness of the in-situ microbial ecological remediation methods for oil contaminated soil in loess region of North Shaanxi. In addition, it was discussed for feasibility of extend application of the technique.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2008年第6期2200-2205,共6页
Journal of Agro-Environment Science
基金
科技部国际合作项目(2005DFA90200)
关键词
陕北黄土区
石油污染
原位
地质微生态修复技术
loess region of North Shaanxi Province
oil contamination
in-situ
micro-ecological remediation
