生物菌剂对石油污染土壤生物修复作用的研究 Bioremediation of Petroleum Hydrocarbon Contaminated Soil

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生物菌剂对石油污染土壤生物修复作用的研究

Bioremediation of Petroleum Hydrocarbon Contaminated Soil by Bioaugmentation Products

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摘要:在实验室条件下,研究了生物菌剂的投加量、投加方式及环境温度对石油污染土壤的修复作用.结果表明,土壤中石油烃的降解效果与生物菌剂的投加量呈正相关,当生物菌剂投加量为0.6 mg·kg-1时,修复48 d后,石油烃的降解率为87%.GC-MS分析结果表明,石油污染原土中烷烃的含量最高为82.1%,其次为烯烃,含量为16%,还含有少量的胡萝卜烷、烷基萘、甾烷和藿烷.添加生物菌剂修复40 d后,峰的数量由32个减少为14个,表明异构烷烃、烯烃、胡萝卜烷全部被降解,残留的物质为较难降解的正构烷烃、藿烷和甾烷,呈前高后低的峰形,即接种细菌优先降解高碳组分,将长链的烷烃降解为短链的烷烃,随着生物菌剂投加量的增加,土壤中残留石油烃的含量逐渐降低.一次加入生物菌剂修复48 d后的峰高明显低于分2次加入的相应值,故一次性全部加入生物菌剂是最佳的投加方式.温度是限制石油污染土壤生物修复的重要环境因素,当温度为30℃,第48 d的降解率可达80%,当温度为20℃,第48 d的降解率可达60%,温度高有利于土壤中石油烃的降解,加快修复速率.
作 者: 黄廷林    徐金兰    唐智新    肖洲强    HUANG Ting-lin    XU Jin-lan    TANG Zhi-xin    XIAO Zhou-qiang  
作者单位:西安建筑科技大学环境与市政工程学院,西安,710055 
期 刊:环境科学   ISTICPKU  
Journal:CHINESE JOURNAL OF ENVIRONMENTAL SCIENCE  
年,卷(期):2009, 30(6) 
分类号:X53 
关键词: 石油污染土壤    生物菌剂    GC-MS分析    投加方式    温度   
机标关键词:生物菌剂石油污染土壤生物修复作用ProductsContaminated Soil降解率投加量石油烃环境温度正构烷烃胡萝卜烷重要环境因素土壤生物修复含量实验室条件甾烷异构烷烃烯烃烷烃降解分析结果 
基金项目:国家自然科学基金,教育部高等学校博士学科点专项科研基金 
下一篇:可见光照射下土壤光催化降解有毒有机污染物 Degradation of Toxic Organic Pollutants by Soil Catalysis
上一篇:不同类型凋落物对土壤有机碳矿化的影响 Effects of Different Types of Litters on Soil Organic Carbon
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