Optimization of cultural conditions of Arthrobacter sp. Sphe3 for growth-associated chromate(VI) reduction in free and immobilized cell systems

Ziagova, Maria G.; Koukkou, Anna‐Irini; Liakopoulou-Kyriakides, M.

doi:10.1016/j.chemosphere.2013.09.112

Cited by 29 publications

(10 citation statements)

References 34 publications

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“…Ziagova et al . characterized the ability of the Arthrobacter sp . Sphe3 to reduce Cr(VI) in suspended cell cultures as well as in immobilized form using Ca‐alginate beads.…”

Section: Resultsmentioning

confidence: 99%

“…However, there was an increase in total chromium removal when the electromagnetic field was applied, resulting in a removal of almost 40%, whereas for the experiment in the absence of electromagnetic field, the reduction was 28%. Ziagova et al [28] characterized the ability of the Arthrobacter sp. Sphe3 to reduce Cr(VI) in suspended cell cultures as well as in immobilized form using Ca-alginate beads.…”

Section: Influence Of the Initial Volume Of Effluentmentioning

confidence: 99%

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Influence of an electromagnetic field on the bioreduction of chromium (VI) using a mixed culture of microorganisms

Moura

Terra

Borges

et al. 2014

Env Prog and Sustain Energy

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In this study, the bioreduction of chromium (VI) and Chemical Oxygen Demand (COD) were obtained using a mixed culture of microorganisms originating from the tannery industry. The influence of an electromagnetic field on the reduction of chromium (VI), together with the removal of COD and total chromium, were evaluated. Batch reactors were used, one in the presence of an electromagnetic field and another without exposure to the field. The bioreduction was conducted with various initial concentrations of chromium (VI) (50, 100, 150, and 200 mg L−1) at different electromagnetic field frequencies (1, 2, 5, and 10 Hz) with different initial volumes of the effluent (300, 500, and 1000 mL). Using an initial concentration of chromium (VI) of 100 mg L−1 in 500 mL of effluent at a frequency of 5 Hz, the maximum chromium (VI) bioreduction was 100% after 8 h, but the total removal of chromium was 38%. Using the same conditions but with a volume of 1000 mL, the same reduction of chromium (VI) was achieved, but there was a need for a longer processing time, ∼14 h. When using concentrations above 100 mg L−1, the same efficiency for the bioreduction of chromium (VI) was not obtained relative to the experiments performed without the presence of an electromagnetic field. The concentration of cells in both reactors remained almost constant over time, except when a frequency higher than 5 Hz was used, where we could observe the occurrence of cell death. © 2014 American Institute of Chemical Engineers Environ Prog, 34: 88–98, 2015

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“…Ziagova et al . characterized the ability of the Arthrobacter sp . Sphe3 to reduce Cr(VI) in suspended cell cultures as well as in immobilized form using Ca‐alginate beads.…”

Section: Resultsmentioning

confidence: 99%

Section: Influence Of the Initial Volume Of Effluentmentioning

confidence: 99%

Influence of an electromagnetic field on the bioreduction of chromium (VI) using a mixed culture of microorganisms

Moura

Terra

Borges

et al. 2014

Env Prog and Sustain Energy

View full text Add to dashboard Cite

show abstract

“…With this rearrangement, both species could bind simultaneously for efficient enzyme cycling, of which binding site otherwise overlapped with the electron donor (Jin et al, 2012). Also, microbial Cr(VI) reduction using glucose as the donor source is very prominent (Camargo et al, 2003;Megharaj et al, 2003;Satarupa and Paul, 2013;Ziagova et al, 2014). Glucose, being the most easily metabolized carbon source, can deliver maximum electrons for Cr(VI) reduction.…”

Section: Electron Donorsmentioning

confidence: 99%

Chemical-Assisted Microbially Mediated Chromium (Cr) (VI) Reduction Under the Influence of Various Electron Donors, Redox Mediators, and Other Additives: An Outlook on Enhanced Cr(VI) Removal

Rahman

Thomas

2021

Front. Microbiol.

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Chromium (Cr) (VI) is a well-known toxin to all types of biological organisms. Over the past few decades, many investigators have employed numerous bioprocesses to neutralize the toxic effects of Cr(VI). One of the main process for its treatment is bioreduction into Cr(III). Key to this process is the ability of microbial enzymes, which facilitate the transfer of electrons into the high valence state of the metal that acts as an electron acceptor. Many underlying previous efforts have stressed on the use of different external organic and inorganic substances as electron donors to promote Cr(VI) reduction process by different microorganisms. The use of various redox mediators enabled electron transport facility for extracellular Cr(VI) reduction and accelerated the reaction. Also, many chemicals have employed diverse roles to improve the Cr(VI) reduction process in different microorganisms. The application of aforementioned materials at the contaminated systems has offered a variety of influence on Cr(VI) bioremediation by altering microbial community structures and functions and redox environment. The collective insights suggest that the knowledge of appropriate implementation of suitable nutrients can strongly inspire the Cr(VI) reduction rate and efficiency. However, a comprehensive information on such substances and their roles and biochemical pathways in different microorganisms remains elusive. In this regard, our review sheds light on the contributions of various chemicals as electron donors, redox mediators, cofactors, etc., on microbial Cr(VI) reduction for enhanced treatment practices.

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“…A common characteristic of immobilised systems is that their remediation efficiency diminishes over time, mostly when they are used for the removal of metals [16,25,35,36]. This behaviour has been associated with increased mechanical instability and gradual cell leakage from the beads during reutilisation cycles [37].…”

Section: Stability and Reusability Of Immobilised Cellsmentioning

confidence: 99%

Improvement of simultaneous Cr(VI) and phenol removal by an immobilised bacterial consortium and characterisation of biodegradation products

et al. 2017

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Optimization of cultural conditions of Arthrobacter sp. Sphe3 for growth-associated chromate(VI) reduction in free and immobilized cell systems

Cited by 29 publications

References 34 publications

Influence of an electromagnetic field on the bioreduction of chromium (VI) using a mixed culture of microorganisms

Influence of an electromagnetic field on the bioreduction of chromium (VI) using a mixed culture of microorganisms

Chemical-Assisted Microbially Mediated Chromium (Cr) (VI) Reduction Under the Influence of Various Electron Donors, Redox Mediators, and Other Additives: An Outlook on Enhanced Cr(VI) Removal

Improvement of simultaneous Cr(VI) and phenol removal by an immobilised bacterial consortium and characterisation of biodegradation products

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