Efficacy of acetate-amended biostimulation for uranium sequestration: Combined analysis of sediment/groundwater geochemistry and bacterial community structure

Xu, Jie; Veeramani, Harish; Qafoku, Nikolla P.; Singh, Gargi; Riquelme, Maria V.; Pruden, Amy; Kukkadapu, Ravi; Gartman, Brandy N.; Hochella, Michael F.

doi:10.1016/j.apgeochem.2016.12.024

Cited by 18 publications

(9 citation statements)

References 81 publications

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“…The Rifle site comprises a former vanadium and uranium ore processing facility. Remediation efforts, such as pilot‐scale in situ biosequestration and acetate‐amended field biostimulation, have been found effective at controlling vanadium (Xu et al, ; Yelton et al, ). To date, most studies have focused on vanadium within a specific environmental matrix, little is presently known about the connection of vanadium distributions in multiple matrices in regional geological environments.…”

Section: Introductionmentioning

confidence: 99%

Microbial Community Responses to Vanadium Distributions in Mining Geological Environments and Bioremediation Assessment

et al. 2019

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Vanadium mining activities can cause contamination of the surrounding geological environment. Vanadium may exist in multiple matrices due to its migration and transformation, forming interactive relationships; however, the connection between vanadium distributions in multiple matrices and microbial community responses remains largely unknown. Vanadium is a redox‐sensitive metal that can be microbiologically reduced and immobilized. To date, bioremediation of vanadium‐contaminated environments by indigenous microorganisms has rarely been evaluated. This paper reports a systematic investigation into vanadium distributions and microbial communities in soils, water, and sediment from Panzhihua, China. Large vanadium contents of 1130.1 ± 9.8 mg/kg and 0.13 ± 0.02 mg/L were found in surface soil and groundwater. Vanadium in surface water tended to precipitate. Microbial communities isolated from similar environments were alike due to similarity in matrix chemistry whereas communities were distinct when compared to different matrices, with lower richness and diversity in groundwater. Proteobacteria was distributed widely and dominated microbial communities within groundwater. Redundancy analysis shows that vanadium and nutrients significantly affected metal‐tolerant bacteria. Long‐term cultivation (240 days) suggests the possibility of vanadium bioremediation by indigenous microorganisms, within acid‐soluble fraction. This active fraction can potentially release mobile vanadium with shifted redox conditions. Vanadium (V) was bio‐reduced to less toxic, mobile vanadium (IV) primarily by enriched Bacillus and Thauera. This study reveals the biogeochemical fate of vanadium in regional geological environments and suggests a bioremediation pathway via native vanadium‐reducing microbes.

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Section: Introductionmentioning

confidence: 99%

Microbial Community Responses to Vanadium Distributions in Mining Geological Environments and Bioremediation Assessment

et al. 2019

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“…Mobility of uranium in groundwater is affected by a large number of factors. In general, U(IV) is less mobile than the oxidised form U(VI) [53]. This is true for several actinides and has been considered in the search for safe repositories for radioactive waste [54].…”

Section: Uraniummentioning

confidence: 99%

“…There is a considerable community of bacteria even at hundreds of meters in hard rock terrains [59,60]. One of the substrates for uranium sequestration could be acetate [53]. Sulphate-reducing conditions are most favourable for the reduction from U(VI) to U(IV) [53,61].…”

Section: Uraniummentioning

confidence: 99%

“…One of the substrates for uranium sequestration could be acetate [53]. Sulphate-reducing conditions are most favourable for the reduction from U(VI) to U(IV) [53,61]. Species involved in the reduction are Desulfobacter, Desulphoropalus and Desulfovibrio spp.…”

Section: Uraniummentioning

confidence: 99%

“…Species involved in the reduction are Desulfobacter, Desulphoropalus and Desulfovibrio spp. [53]. Oxidation of Fe(II) to Fe(III) can also reduce U(VI) to U(IV) [61].…”

Section: Uraniummentioning

confidence: 99%

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Redox Reactions in Groundwater with Health Implications

Jacks¹

2017

Redox - Principles and Advanced Applications

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Mobilisation into groundwater of many trace elements are redox dependant and of health concern. A short list includes arsenic, manganese, chromium, selenium, nitrogen as nitrate and uranium. Arsenic is mobile in groundwater essentially under two conditions, under reducing conditions mobilising ferrous iron and arsenite and at high pH when the ferric oxyhydroxides lose their positive charge. Manganese is mobilised under moderately reducing conditions as Mn2+ and might affect the mental capacity at chronic exposure from drinking water. Chromium is mobile as carcinogenic chromate under oxidising conditions. Manganese oxides may oxidise Cr(III) solids. Chromium may come from natural as well as anthropogenic sources. Selenium, an essential element, rarely exceeds permissible limits but irrigation with groundwater with elevated selenium could cause toxic selenium intake via food. Selenium is mobile in groundwater under oxidising conditions. Nitrate from excess use of fertilisers may be a problem for bottle-fed children below the age of 1 year, forming methaemoglobinemia. Uranium is mobile under oxidising conditions as U(VI). Mobility and toxicity depends on numerous factors. The threat from uranium is its effect on the readsorption in the kidney of water and salts from the primary urine. Oxidation state and speciation govern uranium mobility.

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Biostimulation of indigenous microbes for uranium bioremediation in former U mine water: multidisciplinary approach assessment

Newman-Portela,

Krawczyk-Bärsch,

Lopez-Fernandez

et al. 2023

Environ Sci Pollut Res

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Characterizing uranium (U) mine water is necessary to understand and design an effective bioremediation strategy. In this study, water samples from two former U-mines in East Germany were analysed. The U and sulphate (SO42−) concentrations of Schlema-Alberoda mine water (U: 1 mg/L; SO42−: 335 mg/L) were 2 and 3 order of magnitude higher than those of the Pöhla sample (U: 0.01 mg/L; SO42−: 0.5 mg/L). U and SO42− seemed to influence the microbial diversity of the two water samples. Microbial diversity analysis identified U(VI)-reducing bacteria (e.g. Desulfurivibrio) and wood-degrading fungi (e.g. Cadophora) providing as electron donors for the growth of U-reducers. U-bioreduction experiments were performed to screen electron donors (glycerol, vanillic acid, and gluconic acid) for Schlema-Alberoda U-mine water bioremediation purpose. Thermodynamic speciation calculations show that under experimental conditions, U(VI) is not coordinated to the amended electron donors. Glycerol was the best-studied electron donor as it effectively removed 99% of soluble U, 95% of Fe, and 58% of SO42− from the mine water, probably by biostimulation of indigenous microbes. Vanillic acid removed 90% of U, and no U removal occurred using gluconic acid.

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Efficacy of acetate-amended biostimulation for uranium sequestration: Combined analysis of sediment/groundwater geochemistry and bacterial community structure

Cited by 18 publications

References 81 publications

Microbial Community Responses to Vanadium Distributions in Mining Geological Environments and Bioremediation Assessment

Microbial Community Responses to Vanadium Distributions in Mining Geological Environments and Bioremediation Assessment

Redox Reactions in Groundwater with Health Implications

Biostimulation of indigenous microbes for uranium bioremediation in former U mine water: multidisciplinary approach assessment

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