Biodegradation of hydrocarbons. 3%, w / v) within 5 days using GC-MS analysis.

Biodegradation of hydrocarbons. Apr 21, 2023 · Ecopiling is a method for biodegradation of hydrocarbons in soils. Recent studies showed that archaea of the Candidatus Methanoliparum named as alkylotrophic methanogens couple hydrocarbon degradation and methane production in a single Nov 16, 2020 · Our objective is to review the anaerobic hydrocarbon biodegradation processes, the most important hydrocarbon degraders and their diverse metabolic pathways, including the use of various terminal electron acceptors and various electron transfer processes. Because of the low reactivity of their C-H bonds, either aliphatic or aromatic, hydrocarbons are usually hard to degrade biologically, and all known aerobic Many hydrocarbon-contaminated environments are characterized by low or elevated temperatures, acidic or alkaline pH, high salt concentrations, or high pressure. Nov 1, 2019 · In the present study, the biodegradation behaviors of petroleum hydrocarbons under various reducing conditions were investigated. This is particularly true in pollutants that are made up of many different compounds such as crude oil or petroleum and complete mineralization to CO 2 and H 2 O is desired. Bioremediation is an engineering hydrocarbon-accelerated indigenous of protozoa, petroleum-hydrocarbons Bioremediation an environment-friendly technique to the effective microbial decontamination of groundwater, biodegradation in a contaminated environment or treatment of oil-contaminated May 26, 2024 · Biodegradation Biodegradation of hydrocarbons is a crucial technique in which microorganisms are used to enhance the natural cleansing processes of hydrocarbon pollutants. M. 2018). Microbial degradation represents the major mechanism Apr 5, 2025 · These results suggest that the regulation of nitrogen application is crucial for enhancing hydrocarbon biodegradation efficiency in petroleum-contaminated soils. Jan 1, 2017 · Polycyclic aromatic hydrocarbons (PAHs) are a large group of chemicals. Bacteria are able to degrade aliphatic saturated and unsaturated hydrocarbons via both aerobic and anaerobic pathways. The first section focuses on screening methods, qualitative and Mar 1, 2014 · This review covers an overview of common hydrocarbon pollutants, microbes known as hydrocarbon degraders, major pathways and enzymes involved therein, factors affecting hydrocarbon degradation Apr 11, 2023 · Biodegradation is the breakdown of organic matter or substances into smaller and simpler substances via a biologically catalyzed reduction in the presence of living microorganisms. As a Jan 23, 2025 · Process During biodegradation, microbial organisms metabolize petroleum, degrading the hydrocarbon content. The number of reports concerning their toxicity and emphasizing the ultimate need to remove them from marine and soil environments confirms the unceasing interest of scientists in this field. The process can take more or less time depending on the amount of type and amount of bacteria, the reservoir or ecosystem in which the bacteria are found, and the amount of oxygen present. However, the biodegradation of hydrocarbons is subject to a number of factors and a series of vital and frequently unique interactions between microorganisms and other factors, which primarily occur on the surface of Feb 1, 2021 · The following paper presents a comprehensive review of the current knowledge pertaining to the biodegradation of petroleum hydrocarbons under anaerobic conditions (Examples of successful hydrocarbon degradation under various conditions are shown in Table 1). Over the last few decades, many investigators have focused on the biodegradation of these pollutants. Understanding this process has important implications for the bioremediation of hydrocarbon-contaminated terrestrial and marine Sep 1, 2022 · Concern on increasing incidents of petroleum hydrocarbon spills and spillage into different marine environments is rising day by day due to enhanced human activities in marine water. Mar 28, 2023 · The current article reviews the applicability of various bioremediation processes, biodegradation pathways, and treatments, and the role of microbial activities in achieving efficient eco-sustainable bioremediation of hydrocarbon pollutants. 2011; Balseiro-Romero et al. However, possible recovery of systems contaminated with hydrocarbons has given rise to the interest on the degradation of hydrocarbons, especially in a biologically-driven process known as biodegradation. Mar 25, 2021 · While spilled hydrocarbons are subject to a diversity of weathering processes (e. Jan 1, 2017 · This article provides an overview about bioremediation for petroleum hydrocarbon pollutants. A large variety of aliphatic and aromatic hydrocarbons have been biodegraded under anaerobic conditions. Implementing synthetic biology could improve oil biodegradation. Mar 1, 2025 · Biodegradation of polycyclic aromatic hydrocarbons (PAHs) Various researchers have examined PAH removal efficiencies attained by a variety of WRF, fungal, bacterial, and yeast strains, along with their corresponding LEs. Ex situ biodegradation study was performed to find Sep 30, 2009 · The biodegradation process of hydrocarbons, under anaerobic and reducing conditions, can be hypothesized into three major steps. Because of their hydrophobic nature, most PAHs bind to particulates in soil and sediments, rendering them less available for biological uptake. (12) Dec 1, 2016 · The aim of this work was to study the potential of an indigenous strain of Pseudomonas aeruginosa NCIM 5514, isolated from petroleum-polluted soil, for the biodegradation of crude petroleum oil. Petroleum hydrocarbon molecules cling to different soil constituents and are difficult to eradicate or decompose. Initially high concentration of aromatic hydrocarbons is partly degraded under nitrate and sulfate-reducing conditions to form low molecular weight organic acids as metabolic intermediates. In this study, we used microbial communities of water and soil samples to investigate the biodegradation of heavy oil. 3%, w / v) within 5 days using GC-MS analysis. Aspects of biodegradation of petroleum and individual Interest in the biodegradation mechanisms and environmental fate of polycyclic aromatic hydrocarbons (PAHs) is prompted by their ubiquitous distribution and their potentially deleterious effects on human health. These kinds of pollutants are heterogeneous organic compounds consisting of various structurally arranged carbon and hydrogen atoms (Haque et al. Dec 22, 2022 · Microorganisms play key roles in natural ecosystem functioning, such as primary production, organic matter decomposition, nutrient cycling, and biodegradation of contaminants, including hydrocarbons, thus contributing in different ways to soil and water purification processes. Nevertheless, the biogeochemical cycling and sinks of The biodegradation of hydrocarbons under anaerobic conditions is a significant process that is now known to occur in diverse environments. However, these compounds are slowly degraded by a large variety of microorganisms. Jun 1, 1993 · Polycyclic aromatic hydrocarbons, the products of the incomplete combustion of fossil fuels, are ubiquitous in nature. Nov 23, 2023 · Biodegradation of hydrocarbons from the aqueous phase is relatively efficient, in contrast to biodegradation of hydrocarbons that have sorbed to soil organic matter or that have been sequestered in low-permeability layers (Megharaj et al. This microbial diversity and adaptability maintain ecosystem services, enabling the biodegradation of diverse aliphatic and aromatic hydrocarbons [1]. If these microorganisms are present, then optimal rates of growth and hydrocarbon biodegradation can be sustained by ensuring that adequate concentrations of nutrients and oxygen are present and that the pH is between 6 and 9. While aerobic degradation is faster, some microbes can also anaerobically degrade hydrocarbons through Feb 9, 2019 · Biodegradation of hydrocarbons is a cost-effective technique that is based on highly dispersed microbes in soil and water capable of biodegrading hydrocarbons. Advances in synthetic biology and metabolic engineering strategies have made n-alkane biodegradation more designable and maneuverable for solving environmental pollution problems. evaporation, dissolution, photooxidation, and emulsification), only combustion and biodegradation remove significant quantities of hydrocarbons from the environment. Degradation is an effective method for remediation of petro-hydrocarbons and causes changes in nature and concentration of petro-compounds. Jun 1, 2001 · Saturated and aromatic hydrocarbons are wide-spread in our environment. A few non-hydrocarbon elements like halogen Jan 16, 2021 · Thus, microbial biodegradation of petroleum hydrocarbons has been generating increasing interest as a cost-effective method that causes the least damage to the ecological balance. Gas Taken together, these studies indicate that improving the biodegradation potential via the application of bacterial consortia possessing multiple catabolic genes is a reasonable and feasible strategy for accelerating the removal efficiency of petroleum hydrocarbons from contaminated environments. Biodegradation, naturally occurring (natural attenuation) or by engineered bioremediation (Das and Chandran, 2010), is a key process for the Jan 29, 2019 · To isolate bacteria responsible for the biodegradation of naphthalene, BTEX (benzene, toluene, ethylbenzene, and o-, m-, and p-xylene), and aliphatic hydrocarbons in petroleum-contaminated soil . g. Owing to their toxicity, environmental persistence, and potential bioaccumulation properties, a mounting interest has been kindled in addressing the remediation of PAHs. Bioremediation is a commonly used method for treating… Mar 19, 2022 · Biodegradation of Petroleum Hydrocarbons and The Factors Effecting Rate of Biodegradation Maheen Kanwal Hayat Ullah Aasma Gulzar Tehmina Sadiq Maheen Kanwal Maheen Kanwal Maliha Sarfraz Muhammad Waseem Aslam Nida Nasir Khan Tayyaba Batool Saman Maqsood Ayesha Nawaz *Corresponding author: Munzer Ullah, Department of Biochemistry, University of May 21, 2024 · Article Open access Published: 21 May 2024 Novel enzymes for biodegradation of polycyclic aromatic hydrocarbons identified by metagenomics and functional analysis in short-term soil microcosm Dec 16, 2022 · Abstract Polycyclic aromatic hydrocarbons (PAHs) are composed of a number of aromatic rings. Dec 14, 2020 · Article Open access Published: 14 December 2020 Biodegradation of selected hydrocarbons by novel bacterial strains isolated from contaminated Arabian Gulf sediment Assad Ahmed Al-Thukair, Karim Dec 3, 2018 · The primary factors restricting the biodegradation efficiency of petroleum hydrocarbons are as follows: (1) limited bioavailability of petroleum hydrocarbons to bacteria, and (2) the fact that bacterial cell contact with hydrocarbon substrates is a requirement before introduction of molecular oxygen into molecules by the functional oxygenases Jul 1, 2025 · The biodegradation process of crude oil resulted in the degradation of n-alkanes, thereby reducing the toxicity of hydrocarbons in environmental samples (Kosaric, 2001). Soil samples, from a well contaminated with Abstract Petroleum hydrocarbons are relatively recalcitrant compounds, and as contaminants, they are one of the most serious environmental problems. Its 16S rDNA and rpoD gene sequences indicated that it was a strain of Bacillus subtilis. Studies are presented on the relationship between the chemical structure of the polycyclic aromatic hydrocarbon and the rate of polycyclic aromatic hydrocarbon biodegradation in aquatic and terrestrial ecosystems. Nov 15, 2021 · The current review discusses the insights of major factors that enhance or hinder the bacterial bioremediation of hydrocarbon contaminants (aliphatic, aromatic, and polyaromatic hydrocarbons) in the soil. 0–10. Keywords: hydrocarbon biodegradation, halophile, hypersaline environment, halophilic/halotolerant hydrocarbon-degraders. Nov 1, 2023 · Polycyclic aromatic hydrocarbons (PAHs) are a common class of petroleum hydrocarbons, widely encountered in both environment and industrial pollution sources. Omics technologies provide powerful tools for bioremediation strategies. Jul 31, 2024 · Abstract In subsurface biodegraded oil reservoirs, methanogenic biodegradation of crude oil is a common process. Microbial biodegradation is the use of bioremediation and biotransformation methods to harness the naturally occurring ability of microbial xenobiotic metabolism to degrade, transform or accumulate environmental pollutants, including hydrocarbons (e. Anaerobic bacteria have also been shown capable of utilizing substrates not only in the pure form, but also in complex Hussein I. Sustainable treatments (bioremediation) can attenuate the toxicity of the Sep 1, 1990 · Abstract The ecology of hydrocarbon degradation by microbial populations in the natural environment is reviewed, emphasizing the physical, chemical, and biological factors that contribute to the biodegradation of petroleum and individual hydrocarbons. PAHs constitute a large and diverse class of organic compounds and are generally described as molecules which consist of three or more fused aromatic rings in various structural Jun 5, 2025 · Contamination of ecosystems with persistent organic substances such as crude oil hydrocarbons is a significant environmental concern because aliphatic, aromatic, and heterocyclic compounds have Nov 14, 2018 · This article reviews basic concepts of petroleum hydrocarbons, hydrocarbon degrading microorganisms, factors that influence the biodegradation of contaminants and innovative technologies for the Aug 2, 2022 · Biodegradation of high-molecular-weight petroleum hydrocarbons in saline conditions appears to be complicated and requires further investigation. Studies on the environmental fate of petroleum have demonstrated the nearly ubiquitous distribution of microorganisms that can metabolize hydrocarbons. One is from the community of microbiologists and environmental scientists studying biodegradation in the laboratory and the field. Feb 22, 2024 · Petroleum hydrocarbon biodegradation metabolic pathways and routes are poorly understood, and inefficient transformation results in the accumulation of toxic intermediate substances that can resist further degradation by existing pathways. During the past decade, however, an increasing number of microorganisms have been detected that degrade hydrocarbons under strictly anoxic conditions. To promote biodegradation, amendments such as nitrogen and phosphorous fertilizer are often added to stimulate microbial growth and metabolism. Although the microbial growth rate slowed, these hydrocarbons still supported microbial proliferation and promoted the production of additional surfactants, thus enhancing the bioavailability of hydrocarbons for degradation [45], [46]. Biodegradation is widely employed for the removal and remediation Oct 10, 2008 · Abstract Polycyclic aromatic hydrocarbons (PAHs) are widespread in various ecosystems and are pollutants of great concern due to their potential toxicity, mutagenicity and carcinogenicity. Apr 4, 2023 · INTRODUCTION Hydrocarbons of natural origin are widespread in the environment but because of the massive utilization of petroleum products, they are nowadays strongly involved in environmental pollution (Alexis Nzila (2018), Domde et. Although these Jun 1, 2018 · Petroleum hydrocarbons (PHs) are a big group of chemicals that have caused a major concern because of their widespread distribution into the environment, bioaccumulation potential, harmful effects and biodegradation resistance. It derives from Biopiles, but phytoremediation is added to biostimulation with nitrogen fe Sep 16, 2004 · Biodegradation of crude oil in subsurface petroleum reservoirs is an important alteration process with major economic consequences 1. In Aug 21, 2019 · The biodegradation of petroleum hydrocarbons has many potential applications and has attracted much attention recently. Biodegradation is classified as the most How these factors affect hydrocarbon degradation and their implications for the assessment of hydrocarbon biodegradation in hypersaline environments are presented in this review. Biodegradation contaminants, is a treatment including petroleum to contaminants biodegradation soil. Nov 17, 2020 · Migrated thermogenic hydrocarbons are subject to biodegradation At a water depth of 2306 m, a 3. Several pilot treatments have been implemented to prevent economic consequences and deterioration of soil and water quality. Abdel-Shafy and Mona S. It defines hydrocarbons and explains that they are readily degraded by microorganisms under aerobic conditions. Jun 1, 1996 · Anaerobic biodegradation of aliphatic and aromatic hydrocarbons is a promising alternative to aerobic biodegradation treatments in bioremediation processes. oil), polychlorinated biphenyls (PCBs), polyaromatic hydrocarbons (PAHs), heterocyclic compounds (such as pyridine or quinoline Jun 28, 2025 · Heavy oil, due to its complex hydrocarbon structure and resistance to degradation, poses significant environmental challenges. They are produced because of the incomplete burning of many organic materials like gasoline, charcoal, burning biomass during forest fires, or oil. Jan 25, 2017 · Hydrocarbon biodegradation in soil is determined by a number of environmental and biological factors varying from site to site such as the pH of the soil, temperature, oxygen availability and nutrient content, the growth and survival of hydrocarbon-degrading microbes and bioavailability of pollutants to microbial attack. Both bacteria and fungi can aerobically degrade alkenes, alkanes, and aromatic hydrocarbons through different metabolic pathways. Hydrocarbon-degrading microorganisms, adapted to grow and thrive in these environments, play an important role in the biological treatment of polluted extreme habitats. Subsequently, the advances … Dec 23, 2015 · Since hydrocarbons have low density, their preferential removal by biodegradation leads to oils become progressively denser as biodegradation proceeds, and likely contributes to the phenomenon of “dirty snow”. Environmental conditions and suitability are critical factors for oil biodegradation. , 2007). Strain BL-27 had extensive adaptability and degradability within a broad range of temperatures (25–50 °C), pH (4. Individual microorganisms can metabolize only a limited range of hydrocarbon substrates, so assemblages of mixed Mar 9, 2021 · Oil pollution in marine environment is a serious issue that impacts human health, animal wellness, environmental health, and finally the economy of impaired areas, mainly coastal regions. The isolate completely decolorized 2,6-dichlorophenol indophenol in 120 h when grown at (37 ± 1 °C), indicating its hydrocarbon utilizing nature. May 3, 2015 · Hydrocarbons are relatively recalcitrant compounds and are classified as high-priority pollutants. Apr 15, 2023 · Biodegradation of high-molecular-weight polycyclic aromatic hydrocarbons under anaerobic conditions: Overview of studies, proposed pathways and future perspectives Apr 1, 2023 · In this context, anaerobic biodegradation of hydrocarbons has become an increasingly important process in the management of contaminated subsurface environments [8]. Under optimal conditions (45 °C, pH 7. Feb 14, 2020 · Crude oil-derived hydrocarbons constitute the largest group of environmental pollutants worldwide. Jan 1, 2016 · This chapter addresses the fundamentals of hydrocarbon biodegradation, especially of liquid fossil fuels, and attempts to bring together the conclusions from two rather disparate areas of research. Bioremediation holds significant promise as an eco-friendly approach for degrading Apr 1, 2024 · Particularly, polycyclic aromatic hydrocarbons (PAHs), a class of petroleum compounds, contribute to an increase in microbial hydrocarbon degrader populations while eliminating other microbial species in the environment. Jul 5, 2022 · In a typical biodegradation process, aerobic hydrocarbon-degrading microorganisms first activate hydrocarbons for subsequent oxidation by inserting one or two −OH groups using one or two oxygen atoms (Prince and Walters, 2010, Van Hamme et al. Soil and water pollution is mainly attributed to hydrocarbons from oil refineries, petrochemical industries, human activities and other sources. 44-meter-long piston core was retrieved from the Scotian Slope, off the coast of Eastern Canada (Fig Dec 13, 2023 · Potential biodegradation of polycyclic aromatic hydrocarbons (PAHs) and petroleum hydrocarbons by indigenous fungi recovered from crude oil-contaminated soil in Iran Atmospheric deposition of semivolatile aromatic hydrocarbons accounts for an important input of organic matter to the surface ocean. These compounds exhibit low chemical reactivity and for many decades were thought to undergo biodegradation only in the presence of free oxygen. The removal of such pollutants from the environment is a real‐life issue. It also includes explanation about hydrocarbon metabolism in microorganisms with a special focus on new insights obtained during past couple of years. Jan 14, 2019 · Microbial degradation is a key process for removing aromatic hydrocarbons from the oceans, according to measurements in plankton and seawater with 64 types of polycyclic aromatic hydrocarbons and Oct 22, 2023 · Microorganisms play vital roles in natural ecosystems, encompassing organic matter decomposition, nutrient cycling, contaminant breakdown, and hydrocarbons. , 2014). The rates of degradation depend upon the concentrations of such microbes and upon the environmental characteristics of an oil-contaminated ecosystem … This book details three main topics: the screening and characterization of hydrocarbons from air, soil and water; technologies in the biodegradation of hydrocarbons; and the bioconversion of hydrocarbons for biofuel/chemicals, as well as recent developments in the remediation of hydrocarbons and their environmental benefits. Branched hydrocarbons and cyclic hydrocarbons are also degraded by bacteria. Jun 14, 2013 · Generally, biodegradation of oil affects physical and chemical properties of the petroleum, resulting in a decrease of its hydrocarbon content and an increase in oil density, sulphur content, acidity and viscosity, leading to a negative economic consequence for oil production and refining operations [1, 2]. It is now proven that, besides toluene, benzene and ethylbenzene can be oxidized under anaerobic redox conditions. , 2003). Mansour Abstract Biodegradation of hydrocarbons is a cost-effective technique that is based on highly dispersed microbes in soil and water capable of biodegrading hydrocarbons. Although hydrocarbon biodegradation can occur over a wide range of temperatures, the rate of biodegradation generally decreases with the decreasing temperature. Jan 1, 2023 · Compounds derived from hydrocarbons are essential for industry and our daily life; however, accidents such as spills or leaks occur regularly, causing severe environmental impact. Aerobic biodegradation Anaerobic biodegredation Drawbacks In reservoirs cooler than approximately Oct 1, 2021 · Biodegradation of petroleum hydrocarbons by filamentous fungi (Aspergillus ustus and Purpureocillium lilacinum) isolated from used engine oil contaminated soil Feb 1, 2021 · The following paper presents a comprehensive review of the current knowledge pertaining to the biodegradation of petroleum hydrocarbons under anaerobic conditions (Examples of successful hydrocarbon degradation under various conditions are shown in Table 1). Bioremediation is a process that makes use of living systems especially microbes to the destruction of toxicants. , 2020; Prauchner et al. Aerobic degradation of petroleum hydrocarbons at the surface Jun 1, 2014 · Hydrocarbon-contaminated environments such as groundwater aquifers are typically anaerobic, and often methanogenic. The pathways of polycyclic aromatic hydrocarbon catabolism are discussed. Apr 1, 2024 · The ability of microorganisms - bacteria, archaea, fungi, or algae - to break down hydrocarbons is the basis for natural and enhanced bioremediation. This process was previously assigned to the syntrophy of hydrocarbon-degrading bacteria and methanogenic archaea. Mar 15, 2023 · Soil contaminated with petroleum hydrocarbons (PHCs) based pollutants is one of the most common pollution issues because of a broad range of petroleum production, storage and utilization globally. Feb 9, 2019 · Biodegradation of hydrocarbons is a cost-effective technique that is based on highly dispersed microbes in soil and water capable of biodegrading hydrocarbons. Hydrocarbonoclastic microbes, both bacteria and fungi have been isolated from contaminated sites and are investigated for their degradation potential. Jul 1, 2004 · Biodegradation of complex hydrocarbon usually requires the cooperation of more than a single species. INTRODUCTION The intent of the present review is to present a broad and updated overview of the microbial ecology of hydrocarbon degradation, emphasizing both environmental and biological factors which are involved in determining the rate at which an extent to which hydrocarbons are removed from the environment by biodegradation. Aug 25, 2021 · Petroleum hydrocarbon pollutants are difficult to be degraded, and bioremediation has received increasing attention for remediating the hydrocarbon polluted area. This review started by introducing the interphase adaptation and transport process of hydrocarbon by microbes. The sensitivity of hydrocarbons to microbial breakdown can be ranked based on their size and structure. Degradation is an effective method Hydrocarbons are highly abundant in nature, originating from both, geochemical and biological processes. They represent an important concern due to their widespread distribution in the environment, their resistance to biodegradation, their potential to bioaccumulate and their harmful effects. There is a lack of knowledge about the biodegradability of heavy oil in the natural environment under aerobic and anaerobic conditions. Microbial Biodegradation and Biotransformation of Petroleum Hydrocarbons Abstract: Summary Petroleum hydrocarbons are known to be a major pollutant. Degradation is an effective method for remediation of petro- hydrocarbons and causes changes in nature and concentration of petro-compounds. n-Alkanes and polycy… Apr 1, 2024 · Particularly, polycyclic aromatic hydrocarbons (PAHs), a class of petroleum compounds, contribute to an increase in microbial hydrocarbon degrader populations while eliminating other microbial species in the environment. Sep 13, 2010 · Temperature also affects the solubility of hydrocarbons [62]. 0) and salinity (0–50 g/L NaCl). al. Bioremediation Dec 1, 2017 · Polycyclic aromatic hydrocarbons (PAHs) are hardly biodegradable carcinogenic organic compounds. Therefore, bacteria isolated from an oil well were characterized to assess their potential in the degradation of hydrocarbons under individual and consortium treatments. Mar 20, 2023 · Microorganisms are the most efficient remediators of hydrocarbon pollution. The key factors limiting the overall hydrocarbon biodegradation are generally categorized as biotic factors and abiotic factors. Syntrophic processes are needed to biodegrade hydrocarbons to methane, and recent studies suggest that syntrophic hydrocarbon metabolism can also occur in the presence of electron acceptors. The aerobic The most effective means for the restoration of contaminated aquatic ecosystems is biodegradation, orchestrated by bacteria, whereby petroleum hydrocarbons are safely and completely degraded into environmentally friendly forms. n-Alkanes are important constituents of petroleum hydrocarbons. Mar 31, 2022 · PDF | On Mar 31, 2022, Munzer Ullah published Biodegradation of Petroleum Hydrocarbons and The Factors Effecting Rate of Biodegradation | Find, read and cite all the research you need on ResearchGate Nov 11, 2016 · Considering the importance of hydrocarbons in various industries, its occurrence in natural and blended forms is inevitable. The biodegradation (transformation or mineralization) of a wide The document discusses the process of biodegradation, where living organisms transform organic compounds, particularly focusing on hydrocarbons and xenobiotic compounds, which are resistant to degradation. These compounds are primarily found in essential oils, natural gas, and petroleum, a complex mixture of alkanes and aromatic compounds (Shen et al. The toxic Jun 1, 2024 · One important issue limiting the biodegradation is their limited availability to microorganisms. 53 mN/m. , 2023). Among the various techniques used for clean-up actions, bioremediation seems to be the most acceptable This document discusses hydrocarbon bioremediation. Some of these chemicals are of environmental concern because of their genotoxic and carcinogenic potential and their persistence in the environment. It details the types of microbes involved, the chemical reactions in aerobic and anaerobic degradation, and the influence of genetic engineering in creating enhanced bacterial strains for Jan 31, 2023 · Biodegradation and biotransformation of petroleum hydrocarbons: progress, prospects, and challenges January 2023 Revista Eletrônica em Gestão Educação e Tecnologia Ambiental 27:e1 January 2023 Feb 15, 2025 · The hydrocarbons are non-polar organic molecules, their structure is formed by carbon and hydrogen atoms which are categorized as aliphatic (straight-chain) and aromatic (cyclic) (Passos et al. Strain BL-27 had extensive adaptability We would like to show you a description here but the site won’t allow us. , 2022). The mechanisms and Nov 29, 2022 · This review presents the bioremediation of petroleum hydrocarbon contaminants in water and soil, focusing on petroleum biodegradable microorganisms essential for the biodegradation of petroleum contaminants. The hydrocarbon-degrading bacterium BL-27 was isolated from petroleum-polluted soil and was compounded with surfactants to improve biodegradation. Sep 18, 2020 · Considering that biodegraded oils have higher content of cyclic and heavier aromatic hydrocarbons compared to undegraded oils, the study of biodegraded oil reservoirs may offer fundamental insights into the aerobic and/or anaerobic nature of the polycyclic hydrocarbon biodegradation in such environments. Consumption of products from sources contaminated by PAHs may be harmful to humans and other animals, as many of these compounds have been involved in The biodegradation of hydrocarbons under anaerobic conditions is a significant process that is now known to occur in diverse environments. 0, 1% NaCl), the strain was able to degrade 65% of crude oil (0. Understanding this process has important implications for the bioremediation of hydrocarbon-contaminated terrestrial and marine Although most oil pollutants enter the environment as a result of chronic inputs associated with the extraction, production, transport, utilization, and disposal of this fossil fuel resource, most public concern occurs when there are large accidental oil spills, May 1, 2025 · When petroleum hydrocarbons served as the sole carbon source, surface tension decreased to 51. x4x4qbf obh6 f6fod7 gmo xitu7mbv xdj1 2p3kocsqe 5ut viwsduh ttizv