Efficient phenol degradation by a newly characterized Pseudomonas sp. SA01 isolated from pharmaceutical wastewaters

Shourian, Mitra; Noghabi, Kambiz Akbari; Zahiri, Hossein Shahbani; Bagheri, Tayebe; Karballaei, Gholamreza; Mollaei, Monir; Rad, Iman; Ahadi, Solmaz; Raheb, Jamshid; Abbasi, Habib

doi:10.1016/j.desal.2008.07.015

Cited by 91 publications

(48 citation statements)

References 54 publications

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“…This phenomenon can be attributed to the effect of carbon starvation on cells growth and biodegradation capabilities. Shourian et al [10] found that carbon starved cells had higher growth rate and higher biodegradation rate of phenol in comparison with non-starved cells in the exponential growth phase. They reported that the rate of phenol degradation is influenced by the energetic status or growth phase of the cells.…”

Section: Resultsmentioning

confidence: 99%

“…Phenolic compounds are among the most prevalent forms of chemical pollutants in the industrial wastewater, generated mainly from oil refineries, coal conversion plants, petrochemicals, polymeric resins, pharmaceuticals, smelting, and related metallurgical operations [5]- [7]. Phenols are well known for their high toxicity for human life, aquatic life and others [8]- [10]. They are considered to be among the most hazardous contaminants, and they are certainly the most difficult to remove [11].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, compared with physico-chemical methods, the biodegradation method of phenols removal is a more environmental friendly and cost effective alternative, universally preferred, because of the possibility of complete mineralization of phenol [2], [11], which results in complete conversion of a compound to its inorganic mineral constituents [1]. It is considered a favorable and most promising approach [10].…”

Section: Introductionmentioning

confidence: 99%

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Transient Behavior in Biodegradation of 2, 4 Dichlorophenol: Is It a Starvation Effect?

Al-Khalid¹,

El‐Naas²

2013

IJCEA

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Abstract-Batch experiments were carried out to examine the biomass acclimatization during the aerobic biodegradation of 2, 4 dichlorophenol (2, 4 DCP) by Pseudomonas putida immobilized in polyvinyl alcohol (PVA) gel pellets in a bubble column bioreactor. The bacteria was acclimatized to 2, 4 DCP with concentrations of up to 200 mg/l, with and without the addition of glucose. After the acclimatization, experiments were carried out with initial 2, 4 DCP concentrations ranging from 25 to 100 mg/l. In the course of the study, a phenomenon was noticed that can be related to the effect of carbon starvation on the biodegradation ability of the bacterial cells. This paper presents the results on this phenomenon. Starved cells showed higher growth and degradation rates.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Transient Behavior in Biodegradation of 2, 4 Dichlorophenol: Is It a Starvation Effect?

Al-Khalid¹,

El‐Naas²

2013

IJCEA

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“…These microorganisms also modify their cell surface in order to increase the affinity for hydrophobic substrates and thus facilitate their absorption [9]. Toluene degradation is sensitive to many factors such as temperature [10], pH, incubation periods, carbon and nitrogen sources, and aeration rate [11]. Response surface methodology (RSM) is a collection of statistical and mathematical techniques for designing experiments, building models, evaluating the relative significance of several independent variables, and determining the optimum conditions for desirable responses [12][13].…”

Section: Introductionmentioning

confidence: 99%

Optimizing Toluene Degradation by Bacterial Strain Isolated from Oil-Polluted Soils

Heydarnezhad¹,

Hoodaji²,

Shahriarinour³

et al. 2018

Pol. J. Environ. Stud.

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The presence of toxic compounds like toluene has caused extensive contamination in oil-contaminated environments. Using bacteria to degrade monoaromatic compounds could be a good approach to finding a suitable bioaugmentation agent. In this study on toluene, degrading bacterial species were isolated from oil-contaminated environments (located in Bandar-Anzali, Guilan, Iran). The strain has been molecularly identified as Bacillus cereus ATHH39 (Accession number: KX344721) by partial sequencing of the 16S rDNA gene. Response surface methodology (RSM) was used for biodegradation of toluene by ATHH39 by implementing the central composite design (CCD). The central composite design (CCD) was applied to optimize and investigate pH, temperature, and toluene concentrations and their interactions for enhancing cell growth and toluene degradation by ATHH39 under in vitro conditions. The variables (pH, temperature, and toluene concentrations) with the highest significant impacts on growth and toluene degradation were selected. According to the prediction and optimization function of the design expert software, the optimum conditions of cell growth and toluene degradation were found. When pH, temperature, and toluene concentration were adjusted to 6.72, 33.16ºC and 824.15 mg/l, respectively, cell growth and toluene degradation reached OD 600 = 0.69 and 64.11%, respectively, which is very close to the predicted cell growth and toluene degradation of OD 600 = 0.71 and 65.85%, indicating that the response surface methodology optimization of process parameters for cell growth and toluene degradation is reliable. Based on the results, the ATHH39 strain was introduced as a useful microorganism with the potential for bioremediation of wastewater containing toluene.

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“…This results in complete conversion of a compound to its inorganic mineral constituents (Nair et al, 2008), with harmless end products and minimum secondary metabolites (Sridevi et al, 2011). Novel bioremediation strategies are rising as a favorable and most promising green technology for the treatment of wastewaters (Menale et al, 2012;Shourian et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of 2, 4 Dichlorophenol

Al-Khalid¹,

El‐Naas²

2017

American Journal of Engineering and Applied Sciences

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Abstract:The present study focuses on the optimization of process parameters of the aerobic biodegradation of 2, 4 Dichlorophenol (2, 4 DCP) by a commercial strain of P. putida immobilized in PVA gel matrix, using design of experiments by Response Surface Methodology (RSM). The degradation rates obtained from these experiments were used to evaluate the effects of the main factors and their interactions during the biodegradation of 2, 4 DCP. An effective quadratic regression model predicting the rate in terms of the main independent variables, namely temperature, initial pH and initial concentration of 2, 4 DCP, was developed. The optimum conditions for DCP degradation were obtained as follows: Temperature 32.6°C, pH 5.0 and initial DCP concentration 70.5 mg L −1 , resulting in a maximum predicted degradation rate of 41.8 mg L. Under these optimized conditions, a degradation rate of 40.1 mg L −1 h −1was experimentally obtained, thus validating the model.

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Efficient phenol degradation by a newly characterized Pseudomonas sp. SA01 isolated from pharmaceutical wastewaters

Cited by 91 publications

References 54 publications

Transient Behavior in Biodegradation of 2, 4 Dichlorophenol: Is It a Starvation Effect?

Transient Behavior in Biodegradation of 2, 4 Dichlorophenol: Is It a Starvation Effect?

Optimizing Toluene Degradation by Bacterial Strain Isolated from Oil-Polluted Soils

Biodegradation of 2, 4 Dichlorophenol

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