Efficiency of phenol biodegradation by planktonic Pseudomonas pseudoalcaligenes (a constructed wetland isolate) vs. root and gravel biofilm

Kurzbaum, Eyal; Kirzhner, F.; Sela, Shlomo; Zimmels, Y.; Armon, Robert

doi:10.1016/j.watres.2010.07.020

Cited by 48 publications

(16 citation statements)

References 44 publications

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“…Rhizosphere and gravel-attached bacteria enumeration was performed by bacterial release as previously described by Garland (1996), with minor modifications. Phenol-degrading bacteria were enumerated using the same procedure, with the exception of the use of a solid minimal salts medium as the solid growth medium, supplemented with 50 mg•L -1 phenol as a sole carbon and energy source (Kurzbaum et al, 2010).…”

Section: Enumeration Of Total Culturable Heterotrophic and Phenol-degmentioning

confidence: 99%

Performance comparison of plant root biofilm, gravel attached biofilm and planktonic microbial populations, in phenol removal within a constructed wetland wastewater treatment system

Kurzbaum

Kirzhner

Armon

2016

WSA

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This study was performed in order to understand the relative contribution of a constructed wetland (CW) system's various components to phenol degradation (100 mg•L -1 ) under controlled plant biomass/gravel/ water experimental ratios. This was done by division of a pilot-scale CW system into its components, with or without their associated bacteria: (i) gravel, plant and water; (ii) gravel and water; (iii) water; (iv) gravel; (v) plant; (vi) control (sterile water). The highest phenol biodegradation rate occurred for the gravel-attached biofilm followed by root-attached biofilm and planktonic population, which recorded a similar rate to each other and a much lower rate than the gravel-attached biofilm. A control containing CW planktonic inactivated bacteria (autoclaved water) did not impact phenol removal, revealing that microbial populations are the major factor in phenol removal. The differences in the phenol removal achieved could be attributed to higher numbers of specific phenol degraders on the gravel surface, compared to lower numbers of root-attached and planktonic bacterial fractions, as isolated using phenol-agar plates which contained phenol as the sole carbon source. The main contributor to our findings appears to be the larger surface area provided by the gravel bed compared to plant roots.

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Section: Enumeration Of Total Culturable Heterotrophic and Phenol-degmentioning

confidence: 99%

Performance comparison of plant root biofilm, gravel attached biofilm and planktonic microbial populations, in phenol removal within a constructed wetland wastewater treatment system

Kurzbaum

Kirzhner

Armon

2016

WSA

Self Cite

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“…Each biofilm reacts to the environment fundamentally differently from a planktonic cell of the same species because the complex microbial biofilm community has a primitive homeostasis, a primitive circulatory system, and metabolic cooperativity [19]. Besides providing physical attachment surfaces to microbes, plant roots also provide beneficial exudates, such as amino acids, simple sugars, complex carbohydrates, and oxygen [19][20][21][22]. All of these may cause rhizomicrobes to tolerate phenol and participate in phenol degradation more effectively [20,[23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Rhizomicrobial-augmented mature vetiver root system rapidly degrades phenol in illegally dumped industrial wastewater

Teeratitayangkul¹,

Phutthasimma²,

Wichai³

et al. 2019

Desalination and Water Treatment

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a b s t r a c tIllegal dumping of phenol-concentrated industrial wastewater in a residential area poses serious health risks to the community in Thailand. Thus, a low-cost and easily implementable treatment technique that the affected community can perform is greatly beneficial. Here, we evaluated the enhanced phenol-degradation kinetics using a rhizomicrobial-augmented mature vetiver root system on a floating platform (with and without aeration) in comparison to a previously published study of a young vetiver root system. The mature vetiver root was covered with a biofilm of phenol-degrading rhizomicrobes including bacteria (Enterobacter spp., Pseudomonas spp., Rhodococcus spp., and Acinetobacter spp.) and fungi (Candida spp., Rhizopus spp., Aspergillus spp., and Fusarium spp.). Phenol (500 mg L -1 ) was degraded to 1 mg L -1 in 249 h using rhizomicrobial-augmented mature vetiver with aeration. Using young vetiver plantlets with aeration, this occurred in 675 h, and using rhizomicrobial-augmented mature vetiver without aeration, this occurred in 766 h. The findings suggest that, in addition to augmented rhizomicrobes, vetiver maturity and aeration substantially contribute to the enhancement. The vetiver maturity increased the root biomass, which releases more peroxidase for accelerating phenol transformation, and enhanced the superoxide dismutase activity, which decreases the side effects of phenol detoxification. Aeration enhanced the peroxidase and superoxide dismutase activity in the vetiver and augmented rhizomicrobes to accelerate the phenol polymerization to non-toxic by-products.

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“…Therefore, the efficient removal of phenol-derived pollutants from waste effluents is of great importance. So far, a variety of techniques, such as adsorption [3,4], ion exchange [5], membrane separation [6,7], biological degradation [8,9], chemical oxidation [10,11], electrochemical methods [12] and solvent extraction [13,14], have been developed to remove the phenol-derived pollutants. However, adsorption treatment is still the most attractive process for its high efficiency good selectivity, low cost and easy handling in adsorption and desorption of the contaminants [15].…”

Section: Introductionmentioning

confidence: 99%

Fe3O4 embedded ZIF-8 nanocrystals with ultra-high adsorption capacity towards hydroquinone

Jiang

Chen

Liu

et al. 2015

Journal of Alloys and Compounds

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Efficiency of phenol biodegradation by planktonic Pseudomonas pseudoalcaligenes (a constructed wetland isolate) vs. root and gravel biofilm

Cited by 48 publications

References 44 publications

Performance comparison of plant root biofilm, gravel attached biofilm and planktonic microbial populations, in phenol removal within a constructed wetland wastewater treatment system

Performance comparison of plant root biofilm, gravel attached biofilm and planktonic microbial populations, in phenol removal within a constructed wetland wastewater treatment system

Rhizomicrobial-augmented mature vetiver root system rapidly degrades phenol in illegally dumped industrial wastewater

Fe3O4 embedded ZIF-8 nanocrystals with ultra-high adsorption capacity towards hydroquinone

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