Microbial biodegradation

About: Microbial biodegradation is a research topic. Over the lifetime, 1647 publications have been published within this topic receiving 75473 citations.

Surfactant-mediated Biodegradation of Polycyclic Aromatic Hydrocarbons

Abstract: Polycyclic aromatic hydrocarbons (PAHs) are toxic environmental pollutants that are known or suspected carcinogens or mutagens. Bioremediation has been used as a general way to eliminate them from the contaminated sites or aquifers, but their biodegradation is rather limited due to their low bioavailability because of their sparingly soluble nature. Surfactant-mediated biodegradation is a promising alternative. The presence of surfactants can increase the solubility of PAHs and hence potentially increase their bioavailability. However, inconclusive results have been reported on the effects of surfactant on the biodegradation of PAHs. In this work, surfactant-mediated biodegradation of PAHs is reviewed.

Bioremediation of chlorinated and polycyclic aromatic hydrocarbon compounds

Abstract: Degradation Kinetics of Chlorinated Solvents by a Propane-Oxidizing Enrichment Culture A Field Evaluation of In Situ Microbial Reductive Dehalogenation by the Biotransformation of Chlorinated Ethenes Bioremediation of Trichloroethylene-Contaminated Soils by a Methane-Utilizing Bacterium Methylocystis SP M Evaluating Trichloroethene Biodegradation by Measuring the In Situ Status and Activities of Microbial Populations Constitutive Degradation of Trichloroethylene by an Altered Bacterium in a Gas-Phase Bioreactor Biodegradation of Carbon Tetrachloride under Anoxic Conditions Comparative Efficiency of Microbial Systems for Destroying Carbon Tetrachloride Contamination in Hanford Groundwater Anaerobic Biotransformation and Transport of Chlorinated Hydrocarbons in Groundwater In Situ Bioremediation at a Wood-Preserving Site in a Cold, Semi-Arid Climate: Feasibility and Field Pilot Design Practicability of In Situ Bioremediation at a Wood-Preserving Site Biological Treatability Studies on Surface Impoundment Sludge from a Chemical Manufacturing Facility Effects of Different Hydropneumatic In Situ Remediation Systems A Biotreatment-Train Approach to a PCP-Contaminated Site: In Situ Bioremediation Coupled with an Aboveground Bifar System Using Nitrate as the Electron Acceptor Investigations on the Microbial Degradation of Polycyclic Aromatic Hydrocarbons (PAHs) in Contaminated Soils Bioremediation of Water and Soils Contaminated with Creosote: Suspension and Fixed-Film Bioreactors vs Constructed Wetlands and Plowing vs Solid Peroxygen Treatment Relative Rates of Biodegradation of Biodegradation of Substituted Polycyclic Aromatic Hydrocarbons Pathways of Microbial Degradation of Polycyclic Aromatic Hydrocarbons in Soil Studies on the Microbial Ecology of Polycyclic Aromatic Hydrocarbon Biodegradation Degradation of Chlorinated Phenols and Chlorinated Dibenzo-p-Dioxins by Phanerochaete Chrysosporium Field Evaluations of the Remediation of Soils Contaminated with Wood-Preserving Chemicals Using Lignin-Degrading Fungi A Field and Modeling Comparison of In Situ Transformation of Trichloroethylene by Methane Utilizers and Phenol Utilizers Bioremediation of Chlorinated Solvents in the Vadose Zone Adaptation of Bacteria to Chlorinated Hydrocarbon Degradation Potential Applications of Phage Display to Bioremediation Improving the Biodegradative Capacity of Subsurface Bacteria Natural Anaerobic Degradation of Chlorinated Solvents at a Canadian Manufacturing Plant Environmental Restoration Using Plant-Microbe Bioaugmentation Transformation of Tetrachloromethane under Denitrifying Conditions by a Subsurface Bacterial Consortium and Its Isolates Change in Trichloroethylene Decomposition Activity of Methylocystis SPM During Batch Culture Factors Affecting Transformation of Chlorinated Aliphatic Hydrocarbons by Methanotrophs Transformation of Tetrachloroethene to Ethene in Mixed Methanogenic Cultures: Effect of Electron Donor, Biomass Levels, and Inhibitors Evaluating In Situ Trichloroethene Biotransformation Using In Situ Microcosms In Situ Remediation Using Anaerobic Biotransformation of Groundwater Contaminated with Chlorinated Solvents Soluble Methane Monooxygenase Activity in Methylomonas Methanica 68-1 Isolated from a Trichloroethylene-Contaminated Aquifer Trichloroethylene Cometabolism by Phenol-Degrading Bacteria in Sequencing Biofilm Reactors Phenol-Induced TCE Degradation by Pure and Mixed Cultures in Batch Studies and Continuous-Flow Reactors Comparison of Methanotrophic and Anaerobic Bioremediation of Chlorinated Ethenes in Groundwater Laboratory Evaluation of Aerobic Transformation of Trichloroethylene in Groundwater Using Soil Column Studies Evaluating Polychlorinated Biphenyl Bioremediation Processes: From Laboratory Feasibility Testing to Pilot Demonstrations Concepts in Improving Polychlorinated Biphenyl Bioavailability to Bioremediation Strategies Field Study of Aerobic Polychlorinated Biphenyl Biodegradation in Hudson River Sediments Bioremediation of Soil Contaminated with the Herbicides 2,4-Dichlorophenoxyacetic Acid (2,4-D) and 4-Chloro-2-Methylphenoxyacetic Acid (MCPA) Fluidized-Bed Bioreclamation of Groundwater Contaminated with Chlorophenols Application of a Structured Kinetic Model to the Bioremediation of Hanford Groundwater Molecular Environmental Diagnostics of Trichloroethylene (TCE) Contaminated Subsurface Environments Baseline Characterization and Remediation-Induced Changes in TCE Degradative Potential Using Enrichment Techniques and DNA Probe Analysis Application of Microbial Biomass and Activity Measures to Assess In Situ Bioremediation of Chlorinated Solvents Spatial Variability of Aerobic Degradation Potential for Organic Pollutants In Situ Measurement of Degradation of Specific Organic Compounds under Aerobic, Denitrifying, Iron (III)-Reducing, and Methanogenic Groundwater Conditions Anaerobic Metabolism of Chlorinated Benzenes in Soil under Different Redox Potentials An Approach to the Regulation of Bioremediation of Polychlorinated Biphenyls Degradation and Mineralization of Polychlorinated Biphenyls by White-Rot Fungi in Solid-Phase and Soil Incubation Experiments Degradation of Environmental Pollutants by White-Rot Fungi The Activated Soil Process: Production and Use of a Bacterial Consortium for the Bioremediation of Contaminated Soil from Wood-Preserving Industries On-Site/Ex Situ Bioremediation of Industrial Soils Containing Chlorinated Phenols and Polycyclic Aromatic Hydrocarbons Screening for Natural Subsurface Biotransformation of Polycyclic Aromatic Hydrocarbons at a Former Manufactured Gas Plant Considering Microbiological Conditions at a Former Manufactured Gas Plant Preliminary Evidence of Anaerobic Microbial Activity in the Subsurface of a Former Manufactured Gas Plant Subsurface Sampling Techniques Used for a Microbiological Investigation Full-Scale Slurry-Phase Biological Treatment of Wood-Preserving Wastes Slurry Bioremediation of Polycyclic Aromatic Hydrocarbons in Sediments from an Industrial Complex Washing and Slurry-Phase Biotreatment of Creosote-Contaminated Soil Demonstration of Soil Bioremediation and Toxicity Reduction by Fungal Treatment Author List Index

Factors affecting the microbial degradation of phenanthrene in soil. (Reannouncement with new availability information)

Abstract: Because phenanthrene was mineralized more slowly in soils than in liquid media, a study was conducted to determine the environmental factors that may account for the slow biodegradation in soil. Mineralization was enhanced by additions of phosphate but not potassium, and it was reduced by additions of nitrate. Aeration or amending the soil with glucose affected the rate of mineralization, although not markedly. Phenanthrene was sorbed to soil constituents, the extent of sorption being directly related to the percentage of organic matter in the soil. Soluble phenanthrene was not detected after addition of the compound to a muck soil. The rate of mineralization was slow in the organic soil and higher in mineral soils with lower percentages of organic matter. We suggest that sorption by soil organic matter slows the biodegradation of polycyclic aromatic hydrocarbons that are otherwise readily metabolized.

Biodegradation of the Acetanilide Herbicides Alachlor, Metolachlor, and Propachlor

Abstract: Alachlor, metolachlor, and propachlor are detoxified in biological systems by the formation of glutathione-acetanilide conjugates. This conjugation is mediated by glutathione-S-transferase, which is present in microorganisms, plants, and mammals. Other organic sulfides and inorganic sulfide also react through a nucleophilic attack on the 2-chloro group of acetanilide herbicides, but the products are only partially characterized. Sorption in soils and sediments is an important factor controlling the migration and bioavailability of these herbicides, while microbial degradation is the most important factor in determining their overall fate in the environment. The biodegradation of alachlor and metolachlor is proposed to be only partial and primarily cometabolic, and the ring cleavage seems to be slow or insignificant. Propachlor biodegradation has been reported to proceed to substantial (> 50%) mineralization of the ring structure. Reductive dechlorination may be one of the initial breakdown mechanisms under anaerobic conditions. Aerobic and anaerobic transformation products vary in their polarity and therefore in soil binding coefficient. A catabolic pathway for chloroacetanilide herbicides has not been presented in the literature because of the lack of mineralization data under defined cultural conditions.