Topic
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 authors focus on the synthesis of microorganisms (e.g., metal-resistant microorganisms and organic pollutant-degraders)-CMs immobilized complexes (McMICs) and their potential applications in environmental pollution control.
47 citations
TL;DR: In this article, the relationship between chemical (non-biological) and microbial degradation of cyanazine and atrazine in soils ranging in pH from 5.3 to 8.1 was investigated.
Abstract: A laboratory study was performed to investigate the relationship between chemical (non-biological) and microbial degradation of cyanazine and atrazine in soils ranging in pH from 5.3 to 8.1. Atrazine degradation was dominated by chemical processes in both a moderately acidic and a neutral pH soil, but showed a significant microbial involvement in the neutral pH soil. The primary cyanazine degradative mechanism was dependent on soil properties. Cyanazine was short-lived in neutral to slightly basic soils, due to rapid microbial degradation. Cyanazine amide and cyanazine acid were the major metabolites formed. In a moderately acidic soil, microbial degradation was slowed and chemical processes were the primary means of cyanazine degradation.
47 citations
TL;DR: In this paper, the percolation principle was applied to a pilot-scale plant with diesel-fuel-contaminated sand to study the degradation rate of diesel in soil.
Abstract: Microbial hydrocarbon degradation in soil was studied during periodical aerobic/anaerobic switching and under purely aerobic conditions by using a pilot-scale plant with diesel-fuel-contaminated sand. The system worked according to the percolation principle with controlled circulation of process water and aeration. Periodical switching between 4 h of aerobic and 2 h of anaerobic conditions was achieved by repeated saturation of the soil with water. Whatever the cultivation mode, less than 50% of the diesel was degraded after 650 h because the hydrocarbons were adsorbed. Contrary to expectations, aerobic/anaerobic changes neither accelerated the rate of degradation nor reduced the residual hydrocarbon content of the soil. Obviously the pollutant degradation rate was determined mainly by transport phenomena and less by the efficiency of microbial metabolism. The total mass of oxygen consumed and carbon dioxide produced was greater under aerobic/anaerobic changing than under aerobic conditions, although the mass of hydrocarbons degraded was nearly the same. As shown by an overall balance of microbial growth and by a carbon balance, the growth yield coefficient was smaller during aerobic/anaerobic changes than under aerobic conditions.
47 citations
TL;DR: In this article, vanadium, the most abundant heavy metal in crude oil, was used as an internal marker to evaluate the biodegradation and/or weathering of petroleum products.
Abstract: 17α,21β-Hopane is used as an internal marker to evaluate the biodegradation and/or weathering of petroleum products. In this study, vanadium, the most abundant heavy metal in crude oil, was investi...
47 citations
TL;DR: Analytical system stability studies on the continuous flow fermenter operating at steady state were theoretically simulated using the phenol kinetic parameters and Pulse and step increases in phenol influent feed concentration were simulated and the response of the fermenter was analyzed using a computer program.
Abstract: The Haldane inhibition model was used to describe the anaerobic microbial biodegradation of phenol. Experimental data on the biodegradation of phenol obtained from a continuous flow anaerobic ferme...
47 citations