Pentachlorophenol Biodegradation by Citrobacter freundii Isolated from Forest Contaminated Soil

Ammeri, Rim Werheni; Mokni‐Tlili, Sonia; Mehri, Inès; Badi, Souhir; Hassen, Abdennaceur

doi:10.1007/s11270-016-2959-z

Cited by 15 publications

(6 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…, oil), and cyclic hydrocarbons ( e.g. , phenylenediamine, 4-nitroaniline, and pentachlorophenol). Further, Citrobacter sp.…”

Section: Resultsmentioning

confidence: 99%

“…Of the identified plastic-biodegrading strains, many are associated with the degradation and bioremediation of hydrocarbons and polymeric substrates (Table S2). In the mixed enrichment, the most prevalent species was Citrobacter freundii, a bacterium known to degrade long-chain polymers (e.g., tannic acid 44 ), linear hydrocarbons (e.g., oil 45 ), and cyclic hydrocarbons (e.g., phenylenediamine, 46 4-nitroaniline, 47 and pentachlorophenol 48 ). Further, Citrobacter sp.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Enhanced Bioavailability and Microbial Biodegradation of Polystyrene in an Enrichment Derived from the Gut Microbiome of Tenebrio molitor (Mealworm Larvae)

Brandon

Garcia

Khlystov

et al. 2021

Environ. Sci. Technol.

106

View full text Add to dashboard Cite

As the global threat of plastic pollution has grown in scale and urgency, so have efforts to find sustainable and efficient solutions. Research conducted over the past few years has identified gut environments within insect larvae, including Tenebrio molitor (yellow mealworms), as microenvironments uniquely suited to rapid plastic biodegradation. However, there is currently limited understanding of how the insect host and its gut microbiome collaborate to create an environment conducive to plastic biodegradation. In this work, we provide evidence that T. molitor secretes one or more emulsifying factor(s) (30–100 kDa) that mediate plastic bioavailability. We also demonstrate that the insect gut microbiome secretes factor(s) (<30 kDa) that enhance respiration on polystyrene (PS). We apply these insights to culture PS-fed gut microbiome enrichments, with elevated rates of respiration and degradation compared to the unenriched gut microbiome. Within the enrichment, we identified eight unique gut microorganisms associated with PS biodegradation including Citrobacter freundii, Serratia marcescens, and Klebsiella aerogenes. Our results demonstrate that both the mealworm itself and its gut microbiome contribute to accelerated plastic biodegradation. This work provides new insights into insect-mediated mechanisms of plastic degradation and potential strategies for cultivation of plastic-degrading microorganisms in future investigations and scale-up.

show abstract

“…, oil), and cyclic hydrocarbons ( e.g. , phenylenediamine, 4-nitroaniline, and pentachlorophenol). Further, Citrobacter sp.…”

Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Enhanced Bioavailability and Microbial Biodegradation of Polystyrene in an Enrichment Derived from the Gut Microbiome of Tenebrio molitor (Mealworm Larvae)

Brandon

Garcia

Khlystov

et al. 2021

Environ. Sci. Technol.

106

View full text Add to dashboard Cite

show abstract

“…In MFCs, a pure culture of Citrobacter freundii (NCIM 2578) procured from the National Chemical Laboratory, Pune, was inoculated into an anode compartment as a biocatalyst to grow and form biofilm for assessment of bio‐electrogenic activity in the SWW. For optimum growth of microorganisms, the pH was maintained at 8.0 63 . The cathode compartment was filled with KMnO 4 as a catholyte solution.…”

Section: Methodsmentioning

confidence: 99%

Advances in anode configurations for a microbial fuel cell via a computational fluid dynamics electrochemistry and its experimental validation

Kumar

Jujjavarapu

2023

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUNDThe experimental process for optimizing microbial fuel cell (MFC) design under different electrode geometries is restricted. An MFC can be defined as a bio‐electrochemical system (BES) that facilitates the direct conversion of the chemical energy stored in organic matter into electrical energy by harnessing the metabolic activity of microorganisms. Computational fluid dynamics (CFD) tools allow the simulation and evaluation of electro‐analysis phenomena such as cyclic voltammetry and chemical reactions, which can help the optimization of the BESs. In this study, MFC is designed to provide the maximum peak current and efficiency for the applied voltage on various working (or anode) electrode geometries (i.e. hexagonal, square, pentagonal, circular, triangular, rectangular, and rhombus).RESULTSThe CFD simulation results demonstrate that a configuration with a larger perimeter value and surface area (i.e. hexagonal design) of the working electrode shows a higher peak current (2422.75 mA) than other configurations. The experimental findings supported the simulation result and reveal that a hexagonal electrode containing a MFC setup produces a maximum power density of 22.41 ± 0.32 mW m−3 and a current density of 41.58 ± 0.35 mA m−2. The MFC operation demonstrated adequate bioelectricity generation of 540 ± 03 mV on Day 4 of operation at 1000 Ω. Additionally, maximum reduction in chemical oxygen demand (76.13 ± 0.5%) and coulombic efficiency (76.03 ± 0.4%) was achieved for synthetic wastewater using a hexagonal MFC.CONCLUSIONBased on these fundamental discoveries, the CFD simulation and its experimental validation considerably drag focus toward the possibility of employing COMSOL Multiphysics software for system improvement of different MFC system applications. © 2023 Society of Chemical Industry (SCI).

show abstract

“…It is in fact capable of degrading the polluting compounds or immobilizing them inside it so that the volatilization and leaching processes are drastically reduced to the benefit, also, of the other environmental sectors. However, an excess of pollutant exceeded the soil storage capacity or a change in environmental conditions [10]. Soil, as the main interface with other environmental compartments, plays an important role in the fate of organic pollutants.…”

Section: Introductionmentioning

confidence: 99%

Effect of PCP Pesticide Contamination on Soil Quality

Ammeri¹,

Hidri²,

Hassen³

2021

Soil Contamination - Threats and Sustainable Solutions

View full text Add to dashboard Cite

In recent years, soil contamination with pesticides has become a crucial news issue with serious short- and long-term effects on human health and its environment. Pesticides play a significant role in the success of modern farming and food production. These compounds have potential for toxicity and adverse effects on human health and ecological soil systems. Pentachlorophenol (PCP) is one of the most recalcitrant chemicals polluting the environment for its stable aromatic ring system and chloride content. Nowadays, many sites are contaminated with this substance. In these areas, concentrations may stay high for a long time because of slow degradation in the soil due to the negative effects that PCP has on soil microbial populations. Bioremediation of PCP contaminated sites can be realized introducing directly, into a contaminated system, microorganisms able to consume selectively the target compound (bioaugmentation) or increasing the microbial indigenous population by addiction of nutrients in form of organic and/or inorganic fertilizers and biosolids (biostimulation). In the present chapter, we present an overview of the effect of PCP pesticide contamination on soil microbial populations (density and diversity), enzymatic activity and physicochemical parameters. Additionally, the bioremediation process will be detailed.

show abstract

Pentachlorophenol Biodegradation by Citrobacter freundii Isolated from Forest Contaminated Soil

Cited by 15 publications

References 43 publications

Enhanced Bioavailability and Microbial Biodegradation of Polystyrene in an Enrichment Derived from the Gut Microbiome of Tenebrio molitor (Mealworm Larvae)

Enhanced Bioavailability and Microbial Biodegradation of Polystyrene in an Enrichment Derived from the Gut Microbiome of Tenebrio molitor (Mealworm Larvae)

Advances in anode configurations for a microbial fuel cell via a computational fluid dynamics electrochemistry and its experimental validation

Effect of PCP Pesticide Contamination on Soil Quality

Contact Info

Product

Resources

About