Immobilization of strontium during iron biomineralization coupled to dissimilatory hydrous ferric oxide reduction

Roden, Eric E.; Leonardo, Michael R.; Ferris, F. G.

doi:10.1016/s0016-7037(02)00878-5

Cited by 73 publications

(45 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The addition of bacterial cell surfaces to the ammonium carbonate treatment did not appear to enhance Sr uptake, through either an increased precipitation rate or some other mechanism, although the appearance of the crystals did suggest that the cells served as nucleation sites. The apparent primary dependence of Sr partitioning on the precipitation rate is in contrast to the findings of Roden et al (2002), where Sr partitioning into biogenic siderite was greater than into abiotically generated siderite even when the respective precipitation rates were comparable. One potential explanation offered for that result was that the reduced proton activity engendered by bacterial iron reduction could have increased the tendency for Sr 2ϩ to sorb to reactive sites on the siderite surfaces, thereby promoting surface enrichment and entrapment of Sr during crystal growth.…”

Section: Strontium Distribution Coefficientscontrasting

confidence: 91%

“…It is possible that this mechanism may have also been operative during our experiments with the alkalinity-producing urea hydrolysis reaction, but its effect was overwhelmed by the high rates of precipitation generated in our experiments. In our experiments, extensive precipitation occurred over the course of a few hours; in the Roden et al (2002) experiments, Sr uptake into solids occurred over the course of weeks.…”

Section: Strontium Distribution Coefficientsmentioning

confidence: 50%

See 1 more Smart Citation

Strontium incorporation into calcite generated by bacterial ureolysis

Fujita

Redden

Ingram

et al. 2004

Geochimica et Cosmochimica Acta

Self Cite

214

141

View full text Add to dashboard Cite

Abstract-Strontium incorporation into calcite generated by bacterial ureolysis was investigated as part of an assessment of a proposed remediation approach for 90 Sr contamination in groundwater. Urea hydrolysis produces ammonium and carbonate and elevates pH, resulting in the promotion of calcium carbonate precipitation. Urea hydrolysis by the bacterium Bacillus pasteurii in a medium designed to mimic the chemistry of the Snake River Plain Aquifer in Idaho resulted in a pH rise from 7.5 to 9.1. Measured average distribution coefficients (D EX ) for Sr in the calcite produced by ureolysis (0.5) were up to an order of magnitude higher than values reported in the literature for natural and synthetic calcites (0.02-0.4). They were also higher than values for calcite produced abiotically by ammonium carbonate addition (0.3). The precipitation of calcite in these experiments was verified by X-ray diffraction. Time-of-flight secondary ion mass spectrometry (ToF SIMS) depth profiling (up to 350 nm) suggested that the Sr was not merely sorbed on the surface, but was present at depth within the particles. X-ray absorption near edge spectra showed that Sr was present in the calcite samples as a solid solution. The extent of Sr incorporation appeared to be driven primarily by the overall rate of calcite precipitation, where faster precipitation was associated with greater Sr uptake into the solid. The presence of bacterial surfaces as potential nucleation sites in the ammonium carbonate precipitation treatment did not enhance overall precipitation or the Sr distribution coefficient. Because bacterial ureolysis can generate high rates of calcite precipitation, the application of this approach is promising for remediation of 90 Sr contamination in environments where calcite is stable over the long term.

show abstract

Section: Strontium Distribution Coefficientscontrasting

confidence: 91%

Section: Strontium Distribution Coefficientsmentioning

confidence: 50%

Strontium incorporation into calcite generated by bacterial ureolysis

Fujita

Redden

Ingram

et al. 2004

Geochimica et Cosmochimica Acta

Self Cite

214

141

View full text Add to dashboard Cite

show abstract

“…Vivianite has been shown to reductively immobilize other heavy metals such as cobalt and strontium in the environment Roden et al, 2002). The present work clearly indicates its role in uranium reduction.…”

Section: Discussionsupporting

confidence: 62%

Products of abiotic U(VI) reduction by biogenic magnetite and vivianite

Veeramani

Alessi

Suvorova

et al. 2011

Geochimica et Cosmochimica Acta

138

122

View full text Add to dashboard Cite

Reductive immobilization of uranium by the stimulation of dissimilatory metal-reducing bacteria (DMRB) has been investigated as a remediation strategy for subsurface U(VI) contamination. In those environments, DMRB may utilize a variety of electron acceptors, such as ferric iron which can lead to the formation of reactive biogenic Fe(II) phases. These biogenic phases could potentially mediate abiotic U(VI) reduction. In this work, the DMRB Shewanella putrefaciens strain CN32 was used to synthesize two biogenic Fe(II)-bearing minerals: magnetite (a mixed Fe(II)-Fe(III) oxide) and vivianite (an Fe(II)-phosphate). Analysis of abiotic redox interactions between these biogenic minerals and U(VI) showed that both biogenic minerals reduced U(VI) completely. XAS analysis indicates significant differences in speciation of the reduced uranium after reaction with the two biogenic Fe(II)-bearing minerals. While biogenic magnetite favored the formation of structurally ordered, crystalline UO 2 , biogenic vivianite led to the formation of a monomeric U(IV) species lacking U-U associations in the corresponding EXAFS spectrum. To investigate the role of phosphate in the formation of monomeric U(IV) such as sorbed U(IV) species complexed by mineral surfaces, versus a U(IV) mineral, uranium was reduced by biogenic magnetite that was pre-sorbed with phosphate. XAS analysis of this sample also revealed the formation of monomeric U(IV) species suggesting that the presence of phosphate hinders formation of UO 2 . This work shows that U(VI) reduction products formed during in situ biostimulation can be influenced by the mineralogical and geochemical composition of the surrounding environment, as well as by the interfacial solute-solid chemistry of the solid-phase reductant.

show abstract

“…In MICP, the creation of calcium carbonate (calcite) occurs as a consequence of microbial metabolic activity (Stocks-Fischer et al, 1999;Ramakrishnan et al, 2001). Calcite precipitation may be achieved by many different processes (DeJong et al, 2010), including urea hydrolysis Ciurli et al, 1999); BIOGEOCHEMICAL PROCESSES AND GEOTECHNICAL APPLICATIONS denitrification Van Paassen et al, 2010a;Hamdan et al, 2011b); sulphate reduction, inducing dolomite precipitation (Warthmann et al, 2000); and iron reduction, inducing ankerite and other mixed mineral precipitation (Roden et al, 2002;Weaver et al, 2011). Enzymatic hydrolysis of urea by microbes is the most energy efficient of these processes (DeJong et al, 2010), and urease activity is found in a wide range of microorganisms and plants (Bachmeier et al, 2002).…”

Section: Microbially Induced Calcite Precipitationmentioning

confidence: 99%

Biogeochemical processes and geotechnical applications: progress, opportunities and challenges

DeJong¹,

Soga²,

Kavazanjian³

et al. 2014

Bio- And Chemo-Mechanical Processes in Geotechnical Engineering

117

View full text Add to dashboard Cite

Consideration of soil as a living ecosystem offers the potential for innovative and sustainable solutions to geotechnical problems. This is a new paradigm for many in geotechnical engineering. Realising the potential of this paradigm requires a multidisciplinary approach that embraces biology and geochemistry to develop techniques for beneficial ground modification. This paper assesses the progress, opportunities, and challenges in this emerging field. Biomediated geochemical processes, which consist of a geochemical reaction regulated by subsurface microbiology, currently being explored include mineral precipitation, gas generation, biofilm formation and biopolymer generation. For each of these processes, subsurface microbial processes are employed to create an environment conducive to the desired geochemical reactions among the minerals, organic matter, pore fluids, and gases that constitute soil. Geotechnical applications currently being explored include cementation of sands to enhance bearing capacity and liquefaction resistance, sequestration of carbon, soil erosion control, groundwater flow control, and remediation of soil and groundwater impacted by metals and radionuclides. Challenges in biomediated ground modification include upscaling processes from the laboratory to the field, in situ monitoring of reactions, reaction products and properties, developing integrated biogeochemical and geotechnical models, management of treatment by-products, establishing the durability and longevity/reversibility of the process, and education of engineers and researchers.

show abstract

Immobilization of strontium during iron biomineralization coupled to dissimilatory hydrous ferric oxide reduction

Cited by 73 publications

References 66 publications

Strontium incorporation into calcite generated by bacterial ureolysis

Strontium incorporation into calcite generated by bacterial ureolysis

Products of abiotic U(VI) reduction by biogenic magnetite and vivianite

Biogeochemical processes and geotechnical applications: progress, opportunities and challenges

Contact Info

Product

Resources

About