The enhancement of 2-chlorophenol degradation by a mixed microbial community when augmented with Pseudomonas putida CP1

Farrell, Alan; Quilty, Bríd

doi:10.1016/s0043-1354(01)00481-x

Cited by 48 publications

(20 citation statements)

References 20 publications

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“…In order to confirm this, the key enzymes involved in catalyzing ring fission (catechol 1, 2-dioxygenase, catechol 2, 3-dioxygenase) were assayed (Farrell 2002). When adding fluorocatechol into the enzyme-containing solution, the absorbance at 260 nm increased from 0.05 to 0.21 over a period of 5 min.…”

Section: Conversion Of Mono-fluorophenol By Acclimated Activated Sludmentioning

confidence: 98%

Degradation of Mono-Fluorophenols by an Acclimated Activated Sludge

et al. 2006

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Acclimated activated sludge was examined for its ability to degrade mono-fluorophenols as the sole carbon source in aerobic batch cultures. The acclimated activated sludge degraded fluorophenol efficiently. It degraded 100 mg/l 3-fluoropheno and 4-fluorophenol in 16 h with, respectively, 99.85% and 99.91% fluoride anion release and it degraded 50 mg/l 2-fluorophenol in 15 h with 99.26% fluoride anion release. The aerobic biodegradability of the mono-fluorophenols decreased in the order: 4-fluorophenol > 3-fluorophenol > 2-fluorophenol, resulting mainly from a different octanol/water partition coefficient and different steric parameter of the fluorophenols. The mechanism study revealed that the initial step in the aerobic biodegradation of mono-fluorophenols by the activated sludge was their transformation to fluorocatechol. Following transformation of the fluorophenol to fluorocatechol, ring cleavage by catechol 1, 2-dioxygenases proceeded via an ortho-cleavage pathway, then defluorination occurred.

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Section: Conversion Of Mono-fluorophenol By Acclimated Activated Sludmentioning

confidence: 98%

Degradation of Mono-Fluorophenols by an Acclimated Activated Sludge

et al. 2006

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“…However, the biodegradation of many aromatics proceeds through the ortho-cleavage pathway after the formation of catechol because the meta-cleavage results in the formation of dead end metabolites from catechol; the enzyme gets inactivated by the accumulation of a toxic intermediate [38]. As a rule, conversion of catechol does not follow the meta-cleavage pathway, and generally, the ortho-cleavage pathway is required for the complete degradation of many aromatic organics [39]. Discussion of biodegradation pathways and mechanisms can be found in [27,35,36,40].…”

Section: Mechanisms Of Biodegradationmentioning

confidence: 99%

Organic Contaminants in Refinery Wastewater: Characterization and Novel Approaches for Biotreatment

Al-Khalid¹,

El‐Naas²

2018

Recent Insights in Petroleum Science and Engineering

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Addressing major environmental issues, such as water pollution, is essential nowadays in realizing sustainable development. The ever-increasing world population and industrial development have led to the introduction of diferent types of chemicals to the environment, leading to considerable deterioration in environmental quality. A major class of these chemicals is phenolic compounds, which are hazardous pollutants and highly toxic even at low concentrations. In recent years, researchers have realized the importance of extracting new bacterial strains that are efective in treating diferent types of highly contaminated wastewaters at diferent severe conditions. They also focused considerable amount of research on developing new types of reactors that would provide eicient mixing and reduce mass transfer limitations. The aim is to develop and evaluate efective reactor systems and biocatalysts for the biodegradation of major contaminants in petroleum reinery wastewater. This chapter examines the diferent available options for the treatment of reinery wastewater with more focus on novel biotreatment options.

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“…Some microorganisms have the ability to degrade 4-CP after becoming acclimated to it. The dominant microorganisms include Candida albicans, white-rot fungi, microalgae, Fusarium sp., Arthrobacter, photosynthetic bacteria, Pseudomonas et al (Farrell and Quilty, 2002;Lima et al, 2004;Wen et al, 2006;Sahoo et al, 2010;Li et al, 2011;Diez et al, 2012;Kong et al, 2014). 4-CP was degraded in this study by acclimating activated sludge in a sequencing batch bioreactor (SBR) until complete mineralization was achieved.…”

Section: Introductionmentioning

confidence: 98%