, Volume 25, Issue 1, pp 1–9 | Cite as

Interfacial interaction between methyl parathion-degrading bacteria and minerals is important in biodegradation

  • Gang Zhao
  • Qiaoyun Huang
  • Xingmin Rong
  • Peng Cai
  • Wei Liang
  • Ke Dai
Original Paper


In the present study, the influence of kaolinite and goethite on microbial degradation of methyl parathion was investigated. We observed that the biodegradation process was improved by kaolinite and depressed by goethite. Calorimetric data further showed that the metabolic activities of degrading cells (Pseudomonas putida) were enhanced by the presence of kaolinite and depressed by the presence of goethite. A semipermeable membrane experiment was performed and results supported the above observations: the promotive effect of kaolinite and the inhibition of goethite for microbial degradation was not found when the bacteria was enclosed by semipermeable membrane and had no direct contact with these minerals, suggesting the important function of the contact of cellular surfaces with mineral particles. The relative larger particles of kaolinite were loosely attached to the bacteria. This attachment made the cells easy to use the sorbed substrate and then stimulated biodegradation. For goethite, small particles were tightly bound to bacterial cells and limited the acquisition of substrate and nutrients, thereby inhibiting biodegradation. These results indicated that interfacial interaction between bacterial cells and minerals significantly affected the biodegradation of pesticides.


Methyl parathion  Biodegradation  Adsorption  Kaolinite  Goethite 



This research was financially supported by the National Natural Science Foundation of China (Grant No. 41101240) and the Fundamental Research Funds for the Central Universities (Program No. 2011QC043).


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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Gang Zhao
    • 1
  • Qiaoyun Huang
    • 1
  • Xingmin Rong
    • 1
  • Peng Cai
    • 1
  • Wei Liang
    • 1
  • Ke Dai
    • 1
  1. 1.State Key Laboratory of Agricultural Microbiology, College of Resources and EnvironmentHuazhong Agricultural UniversityWuhanChina

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