Selenium reduction by a denitrifying consortium

Rege, Mahesh A.; Yonge, David R.; Mendoza, Donaldo P.; Petersen, James N.; Bereded-Samuel, Yared; Johnstone, Donald L.; Barnes, Joni M.

doi:10.1002/(sici)1097-0290(19990220)62:4<479::aid-bit11>3.3.co;2-7

Cited by 6 publications

(5 citation statements)

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“…Lee et al (2007) reported that facultative anaerobic Shewanella species, well known for their capability to generate electricity in MFCs, were able to utilize selenite as the sole electron acceptor for respiration in anaerobic conditions, resulting in reduction of selenite and precipitation of elemental Se nano-sized spherical particles. Denitrifying bacteria, which could play an important role in electron transfer in the MFCs (Sukkasem et al 2008), were also reported capable of reducing selenite or selenate to elemental Se (Rege et al 1999). By using these electrogens, simultaneous electricity generation and COD/Se removal can be achieved, indicating the great potential of using MFC technology for wastewater treatment.…”

Section: Selenite Removalmentioning

confidence: 99%

Removal of selenite from wastewater using microbial fuel cells

2009

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Simultaneous electricity generation and selenium removal was evaluated in single-chamber microbial fuel cells (MFCs) with acetate and glucose as carbon sources. Power output was not affected by selenite up to 125 mg l(-1) with glucose as substrate. Coulombic efficiencies of MFCs with glucose increased from 25% to 38% at 150 mg Se l(-1). About 99% of 50 and 200 mg Se l(-1) selenite was removed in 48 and 72 h for MFCs fed with acetate and glucose, respectively, demonstrating the potential of using MFC technology for Se remediation.

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Section: Selenite Removalmentioning

confidence: 99%

Removal of selenite from wastewater using microbial fuel cells

2009

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“…Antipov et al (2000) have found that V(V) reduction follows nitrate consumption, and that the process is associated with some structural reorganizations of nitrate reductase. Rege et al (1999) have reported that selenate and selenite reduction occurs after a lag period, during which a seleniumreducing population was stimulated or the needed enzyme was produced in the existing denitrifying population. In the present research, there was still a lag time for Ni(II) reduction with NH 4 + -N instead of NO 3 − -N, and the Ni(II) reduction efficiency had no remarkable difference (data not shown).…”

Section: Discussionmentioning

confidence: 99%

Aerobic bioreduction of nickel(II) to elemental nickel with concomitant biomineralization

Zhan

Zhang

2012

Appl Microbiol Biotechnol

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Although microorganisms have the potential to reduce metals, products with elementary forms are unusual. In the present study, a strain of Pseudomonas sp. MBR was tested for its ability to reduce metal ions to their elementary forms coupled to biomineralization under aerobic conditions. The Pseudomonas sp. MBR strain was able to reduce metals such as Fe(III), Mn(II), Cu(II), Ni(II), Cd(II), Co(II), Al(III), Se(IV), and Te(IV) as electron acceptors to elementary forms using citrate, lactate, pyruvate, succinate, malate, glucose, or ethanol as electron donors. Growth and reduction during biomineralization occurred within the pH range of 6.0 to 11.0 and temperature range of 4 to 40°C, with an optimum growth temperature of 28°C. The resistance of Ni (II) varied from 0.5 to 5 mM. Ni(II) reduction was still observed when nitrate was present in addition to oxygen as a potential electron acceptor. The Ni(II) reduction efficiency was related with the molar ratio of the electron donor to Ni(II). Unlike other dissimilatory metal-reducing bacteria, which oxidizes organic matter with Fe(III) or Mn (IV) as the sole electron acceptor coupled to energy production under facultative anaerobic conditions, this strain used oxygen as an electron acceptor combined with metal reduction. The aerobic metal reduction may relate to a co-metabolic reduction. Transmission electron microscopy images demonstrated that the cells had the ability to accumulate heavy metals, and that the detoxicity mechanism was intracellular metal reduction. These results suggested that the use of Pseudomonas sp. MBR could be promising for toxic heavy metal bioremediation and biological metallurgy.

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“…This is probably due to limitations of analytical methodology, as well as to the low concentrations of selenium species in municipal wastewater. Rege et al (1999) investigated selenate and selenite reduction capability in batch reactors inoculated with a mixed consortium obtained from a wastewater treatment plant. It was observed that biomass possessed the ability to reduce both selenate and selenite to elemental selenium.…”

Section: Mercurymentioning

confidence: 99%

Fate and Biotransformation of Metal and Metalloid Species in Biological Wastewater Treatment Processes

Stasinakis

Thomaidis

2010

Critical Reviews in Environmental Science and Technology

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Suspended and attached growth wastewater treatment processes are widely used for the removal of biodegradable organic constituents and nutrients from wastewater. The frequent detection of toxic metals and metalloids in wastewater contributed to the publishing of numerous papers in the past, investigating their presence, toxicity and behavior in biological wastewater treatment systems (BWTS). In most of these studies, data were referred to total element concentration. However, nowadays it is generally accepted that toxicological and physicochemical properties are differentiated according to elemental speciation. The literature review revealed that there are enough studies investigating chromium species presence, toxicity, fate and biotransformation in BWTS, whereas there are fewer data for organotin compounds. Even less studies exist for arsenic, mercury and selenium species. Most of the results are referred to the activated sludge process. The biotransformation mechanisms are element-dependent. The reduction of Cr(VI) to Cr(III), the sequential debutylation of tributyltin and triphenyltin to inorganic tin, the oxidation of As(III) to As(V) and their methylation to organoarsenicals have been observed. Despite the gaps in the literature, these preliminary, in many cases, results indicate that biological wastewater treatment processes could be used in the future for the detoxification of metal-and metalloid-laden wastewater, allowing the reuse of wastewater and sludge.

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Selenium reduction by a denitrifying consortium

Cited by 6 publications

References 0 publications

Removal of selenite from wastewater using microbial fuel cells

Removal of selenite from wastewater using microbial fuel cells

Aerobic bioreduction of nickel(II) to elemental nickel with concomitant biomineralization

Fate and Biotransformation of Metal and Metalloid Species in Biological Wastewater Treatment Processes

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