Reduction of perchlorate and nitrate by salt tolerant bacteria

Okeke, Benedict C.; Giblin, Tara; Frankenberger, W. T.

doi:10.1016/s0269-7491(01)00288-3

Cited by 114 publications

(65 citation statements)

References 28 publications

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“…Perchlorate reduction by Citrobacter sp. IsoCock1 (Okeke et al, 2002) was sustained on acetate, but yeast extract was found to improve growth. A wide variety of organic substrates, including alcohols and carboxylic acids, can be used as growth substrates by PRB although the use of these substrates is strain-dependent.…”

Section: Electron Donors and Acceptors Used By Prb For Growthmentioning

confidence: 99%

Microbial Degradation of Perchlorate: Principles and Applications

Xu¹,

Song²,

Min³

et al. 2003

Environmental Engineering Science

163

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Perchlorate (ClO 42 ) release into the environment has occurred primarily in association with its manufacture and use in solid rocket propellant. When released into groundwater, perchlorate can spread over large distances because it is highly soluble in water and adsorbs poorly to soil. Two proven techniques to remove perchlorate from drinking water are anaerobic biological reactors and ion exchange. In this review, we focus on the application of microbiological systems for degrading perchlorate. Some bacteria can use perchlorate as an electron acceptor while oxidizing a large range of substrates. Perchlorate-respiring bacteria (PRB) are widely distributed in the environment, and are enriched at perchlorate-contaminated sites. We review the pathways by which PRB degrade perchlorate, and the different biological treatment processes that have been developed to remove perchlorate from water sources. We also discuss the effects of alternate electron acceptors in the water, such as oxygen and nitrate, on perchlorate removal. Although many different biological treatment systems using PRB have so far only been proven at the bench scale, all pilot scale tests performed to date with a few of these systems have been successful. The success of these perchlorate bioreactor tests indicates that biological treatment is a suitable method for soil remediation and water treatment of perchlorate-contaminated water.

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Section: Electron Donors and Acceptors Used By Prb For Growthmentioning

confidence: 99%

Microbial Degradation of Perchlorate: Principles and Applications

Xu¹,

Song²,

Min³

et al. 2003

Environmental Engineering Science

163

View full text Add to dashboard Cite

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“…Perchlorate reduction requires molybdenum in some microbe strains (Chaudhuri et al 2002). Many studies report sequential or simultaneous reduction of nitrate and perchlorate under anaerobic conditions by different microbe strains or communities (Herman and Frankenberger 1999;Giblin et al 2000;Okeke et al 2002;Chaudhuri et al 2002;Tipton et al 2003). Anaerobic perchlorate reduction is inhibited by nitrite, which appears as a nitroglycerin transformation product during propellant manufacture (Attaway 1994).…”

Section: Perchlorate and Chlorate Saltsmentioning

confidence: 99%

“…Anaerobic perchlorate reduction is inhibited by nitrite, which appears as a nitroglycerin transformation product during propellant manufacture (Attaway 1994). Salt-tolerant microbes are capable of perchlorate reduction under anaerobic conditions, which may be applied to the remediation of ion-exchange waste products Okeke et al 2002).…”

Section: Perchlorate and Chlorate Saltsmentioning

confidence: 99%

Environmental Transport and Fate Process Descriptors for Propellant Compounds

Mirecki¹,

Porter²,

Weiss³

2006

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Sustainable management of Army training ranges requires quantification of the distribution, transport, and fate of munitions constituents (propellants and explosives) in soil, surface and groundwater. Propellant formulations are mixtures consisting of energetic compounds, binders, stabilizers, and burning-rate modifiers. Factors that affect the transport and fate of these diverse compounds include dissolution, sorption, biotransformation, volatilization, and photochemical transformation. This report summarizes the current understanding of these processes, and provides process descriptors for propellant compounds. Results of leaching experiments on representative single-base, double-base, and triple-base propellant mixtures also are presented.

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“…Biological denitrification has been found effective to denitrify nitrate in seawater (Labelle et al 2005) and in ion-exchange brine containing 1-12.5% NaCl (Clifford and Liu 1993b;Peyton et al 2001;Okeke et al 2002). However, Clifford and Liu (1993b) reported a 10% drop in denitrification rate in 0.5 N NaCl than that in freshwater controls.…”

Section: Introductionmentioning

confidence: 99%

Rapid and controlled transformation of nitrate in water and brine by stabilized iron nanoparticles

2008

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Highly reactive zero-valent iron (ZVI) nanoparticles stabilized with carboxymethyl cellulose (CMC) were tested for reduction of nitrate in fresh water and brine. Batch kinetic tests showed that the pseudo first-order rate constant (k obs ) with the stabilized nanoparticles was five times greater than that for non-stabilized counterparts. The stabilizer not only increased the specific surface area of the nanoparticles, but also increased the reactive particle surface. The allocation between the two reduction products, NH 4 + and N 2 , can be manipulated by varying the ZVI-to-nitrate molar ratio and/or applying a Cu-Pd bimetallic catalyst. Greater CMC-to-ZVI ratios lead to faster nitrate reduction. Application of a 0.05 M HEPES buffer increased the k obs value by 15 times compared to that without pH control. Although the presence of 6% NaCl decreased k obs by 30%, 100% nitrate was transformed within 2 h in the saline water. The technology provides a powerful alternative for treating water with concentrated nitrate such as ion exchange brine.

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Reduction of perchlorate and nitrate by salt tolerant bacteria

Cited by 114 publications

References 28 publications

Microbial Degradation of Perchlorate: Principles and Applications

Microbial Degradation of Perchlorate: Principles and Applications

Environmental Transport and Fate Process Descriptors for Propellant Compounds

Rapid and controlled transformation of nitrate in water and brine by stabilized iron nanoparticles

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