Principles of microbial PAH-degradation in soil

The effect of concentration on the biodegradation of synthetic organic chemicals by natural microbial communities was investigated by adding individual 14 C-labeled organic compounds to stream water at various initial concentrations and measuring the formation of 14 CO 2 . The rate of degradation of p -chlorobenzoate and chloroacetate at initial concentrations of 47 pg/ml to 47 μg/ml fell markedly with lower initial concentrations, although half or more of the compound was converted to CO 2 in 8 days or less. On the other hand, little mineralization of 2,4-dichlorophenoxyacetate and 1-naphthyl- N -methylcarbamate, or the naphthol formed from the latter, occurred when these compounds were present at initial concentrations of 2 to 3 ng/ml or less, although 60% or more of the chemical initially present at higher concentrations was converted to CO 2 in 6 days. It is concluded that laboratory tests of biodegradation involving chemical concentrations greater than those in nature may not correctly assess the rate of biodegradation in natural ecosystems and that low substrate concentration may be important in limiting biodegradation in natural waters.

Degradation

10.1128/aem.37.6.1211-1216.1979

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Research Progress on Microbial Degradation of Poly-Containing Wastewater

Chemistry & Bioengineering (2011)

Jia Yunpeng

With the developing of microbial degradation technology,more and more achievements have been applied to poly-containing wastewater treatment with unique advantage and tremendous potential.In this paper,advantages and mechanisms of microbial degradation of polyacrylamide are introduced,influential factors of microbial degradation of polyacrylamide are discussed,the research progress of microbial degradation at home and abroad are reviewed,the deficiencies in the practical application of microbial degradation are summarized.

Degradation

Polyacrylamide

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Rapid degradation of sulphamethoxazole and the further transformation of 3-amino-5-methylisoxazole in a microbial fuel cell

Water Research (2015)

Lu Wang Yulei Liu Jun Ma Feng Zhao

Degradation

Shewanella oneidensis

Microbial consortium

10.1016/j.watres.2015.10.030

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Microbial degradation of estrogens in the environment

Microbiology, China (2012)

Fang Zhang

Estrogens in the environment are important environmental endocrine disrupting chemicals,and the major way to remove them is through microbial degradation.This paper reviews four aspects of the microbial degradation of estrogens,including the reported estro-gen-degrading bacteria,degradation mechanisms,the estrogen degradation pathway and es-trogen degradation by eukaryotic microorganisms.In the end,future research directions of microbial degradation of estrogens are suggested.

Degradation

Environmental degradation

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Microbial degradation of disinfectants. X. Microbial degradation of chlorhexidine and its degradation products

Journal of Pharmacobio-Dynamics (1989)

Yasutoshi Kido Fuminori Uraki HIROFUMI KODAMA Masaru Uyeda Motoo Shibata

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