摘要
在温室盆栽条件下,通过单独种植紫茉莉、单独接种多环芳烃(PAHs)模式化合物芘的专性降解菌ZQ5和两者的联合修复的3种处理,对芘污染土壤的修复效果进行了研究。结果表明,经90 d修复后,植物-微生物联合修复可将人工污染土壤中的芘降解81.1%,将石油污染土壤中的芘降解50.3%,其修复效率明显高于其他2种处理,是紫茉莉修复的1.98倍,是降解菌ZQ5修复的1.39倍。ZQ5的不同接菌量对于修复60 d后的降解率影响不大。外源生物修复条件下,10～20 cm土壤的修复效率要高于5 cm土壤;自然降解条件下,5 cm土层降解率略高于其他土层。
A pot-experiment in greenhouse was carried out to investigate the remediation efficiency of pyrene contaminated soil by planting Mirabilis Jalapa L alone, inoculating with PAHs-pyrene degrading bacteria ZQ5 strains alone and microbial-phytoremediation treatment. After 90 days, the results indicate that the microbial-phytoremediation has obvious superiority. It can remove 81.1% pyrene in the artificially contaminated soil, and 50.3% pyrene in the petroleum-contaminated soil. The microbial-phytoremediation efficiency is 1.98 times of Mirabilis Jalapa L and 1.39 times of ZQ5 strains. Different amounts of inoculating ZQ5 strains have obvious difference for initial repairment, but have little effect in the long-term repairment process. Under exogenous bioremediation conditions, the soil in depth of 10 cm to 20 cm has higher remediation efficiency than 5 cm; under natural degradation conditions, degradation rate of 5 cm depth soil is slightly higher than other soil.
出处
《环境工程学报》
CAS
CSCD
北大核心
2013年第7期2752-2756,共5页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(31070448)
辽宁省自然科学基金资助项目(20062111)
关键词
芘
污染土壤
降解效率
植物-微生物联合修复
pyrene
contaminated soil
degradation efficiency
microbial-phytoremediation
