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应用生态学报 ›› 1998, Vol. 9 ›› Issue (6): 640-644.

• 研究论文 • 上一篇    下一篇

污染土壤中多环芳烃生物降解的调控研究

孙铁珩, 宋玉芳, 许华夏, 王鸿雁   

  1. 中国科学院沈阳应用生态研究所, 沈阳110015
  • 收稿日期:1998-05-06 修回日期:1998-09-30 出版日期:1998-11-25 发布日期:1998-11-25
  • 基金资助:

    国家自然科学基金资助项目(39470149)

Regulation of polycyclic aromatic hydrocarbons biodegradation in contaminated soil

Sun Tieheng, Song Yufang, Xu Huaxia, Wang Hongyan   

  1. Institute of Applied Ecology, Academia Sinica, Shenyang 110015
  • Received:1998-05-06 Revised:1998-09-30 Online:1998-11-25 Published:1998-11-25

摘要: 选用温度、湿度、表面活性剂TW-80和C◇N◇P比4个因素为调控因子,采用正交法进行周期为150天的实验研究。结果表明,30天后,土壤中PAHs的降解率可达44.5~74.6%, 60天后,达70.4~93.7%, 降解率的不同与调控条件显着相关。在此期间,降解最佳条件为40℃,湿度25%, C◇N◇P比为120◇10◇1, TW-80分别为200~500mg·kg-1.实验结束时,土壤中PAHs的降解率达91.2~99.8%.降解的最佳条件是40℃,湿度15%.经R值判别表明,不同时期各因子对PAHs降解影响有所不同。温度对PAHs降解影响较大,表面活性剂对土壤中PAHs的生物降解有调控作用。

关键词: 土壤污染, 多环芳烃, 生物降解, 表面活性剂, 参数优化, 时空异质性, 敏感性, BIOME-BGC模型

Abstract: Using temperature, moisture, surfactant TW-80 and C◇N◇Pratio as regulation factors, the biodegradation of ploycyclic aromatic hydrocarbons (PAHs)was carried out with an experimental period of 150 days.The results indicate that the degradation rate of PAHs reached 44.5~74.6% and 70.4~93.7% after 30 and 60 days, respectively.The optimum conditions for degradation during these periods were: temperature 40℃, moisture 25%, C◇N◇Pratio 120◇10◇1, and TW-80 concentration 200~500mg·kg-1 .At the end of this experiment, the degradation rate of PAHs was up to 91.2~99.8%, with an optimum condition of temperature 40℃, and moisture 15%.The discrimination of Rvalue indicates that the influence of the four regulation factors on the degradation rate of PAHs varied with time.Temperature had a significant influence on the degradation of PAHs, and surfactants had a regulating role on the biodegradation of PAHs in soil.

Key words: Soil pollution, Polycyclic aromatic hydrocarbons, Biodegradation, Surfactant, sensitivity, temporal and spatial heterogeneity, BIOME-BGC model, parameter optimization