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Microbial biodegradation
About: Microbial biodegradation is a research topic. Over the lifetime, 1647 publications have been published within this topic receiving 75473 citations.
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TL;DR: In this paper, the changes for saturated hydrocarbons follow a common sequence of removal of different compound classes: n-alkanes > isoalkane > alkylcyclohexanes, with a systematic relationship between decreasing relative degradation rates and increasing chain length.
11 citations
TL;DR: In this paper, a calorimetric approach was developed and successfully tested in order to gain real time information on the kinetics and the physiology of polycyclic aromatic hydrocarbons (PAHs) bioconversion in aqueous systems.
11 citations
11 citations
TL;DR: Maximum biodegradation of 4-aminophenol by Pseudomonas sp.
Abstract: Aromatic compounds such as 4-aminophenol are toxic to the environment and thus should be eliminated effectively. Biodegradation of aromatic compounds is an efficient and environment friendly technique as addition of selected microbes does not add any kind of pollutants and actively remove even the most recalcitrant pollutants. We investigated the effectiveness of Pseudomonas sp. strain ST- 4 in the biodegradation of 4-aminophenol under variable pH, temperature and glucose regimes and sorted out optimum conditions for maximum biodegradation of 4-aminophenol. Maximum biodegradation of 4-aminophenol by Pseudomonas sp. strain ST- 4 was observed at pH 8, temperature 30°C and glucose concentration of 15 mM at 72 h, respectively.
11 citations
TL;DR: In this paper, the authors used GC2/MS to reveal the degradation behavior of distinct coal tar constituents and applying PCA to identify contaminants resistant to microbial degradation can be useful for the optimization of bioremediation measures at contaminated sites.
Abstract: BACKGROUND: Coal tar is a complex mixture of more than 100 compounds, including polycyclic aromatic hydrocarbons (PAHs), alkylated PAHs, phenolic as well as NSO-heterocyclic compounds (HAC). Many of these are associated with human and environmental risk. Information concerning the environmental fate of coal tar constituents, apart from the 16 PAHs listed as priority substances by the US-EPA, is scarce. In the current study, aerobic degradation of aromatic tar oil constituents in ten historically contaminated soils was monitored under laboratory conditions using two-dimensional comprehensive GC2/ MS.
RESULTS: Fifty-four aromatic compounds were detected in one single analysis. Degradation behavior of individual compounds was determined by their hydrophobicity, molecular size, degree of alkylation and isomeric conformation. Eight substances, including six US-EPA PAHs and two benzofluorene isomers, were identified in nine out of ten soils as principal components in the residual contamination after degradation.
CONCLUSION: Using GC2/ MS to reveal the degradation behavior of distinct coal tar constituents and applying PCA to identify contaminants resistant to microbial degradation can be useful for the optimization of bioremediation measures at contaminated sites. Copyright © 2012 Society of Chemical Industry
11 citations