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

Content Provider	Springer Nature Link
Author	Zhao, Gang Huang, Qiaoyun Rong, Xingmin Cai, Peng Liang, Wei Dai, Ke
Copyright Year	2013
Abstract	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.
Starting Page	1
Ending Page	9
Page Count	9
File Format	PDF
ISSN	09239820
Journal	Biodegradation
Volume Number	25
Issue Number	1
e-ISSN	15729729
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-04-03
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Methyl parathion Biodegradation Adsorption Kaolinite Goethite Microbiology Soil Science & Conservation Geochemistry Terrestrial Pollution Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution Waste Management/Waste Technology
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Environmental Engineering Bioengineering Microbiology

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