Publications by Harish Veeramani

Long-term in-situ oxidation of biogenic uraninite in an alluvial aquifer: impact of dissolved oxygen and calcium

Elena Suvorova Buffat, Rizlan Bernier-Latmani, Harish Veeramani, Daniel Scott Alessi

Oxidative dissolution controls uranium release to (sub)oxic pore waters from biogenic uraninite produced by natural or engineered processes, such as bioremediation Laboratory studies show that uraninite dissolution is profoundly influenced by dissolved oxy ...

Amer Chemical Soc2015

Oxidative Dissolution of Biogenic Uraninite in Groundwater at Old Rifle, CO (vol 45, pg 8748, 2011)

Elena Suvorova Buffat, Rizlan Bernier-Latmani, Harish Veeramani

Amer Chemical Soc2012

Quantitative separation of monomeric U(IV) from UO2 in products of U(VI) reduction

Elena Suvorova Buffat, Rizlan Bernier-Latmani, Harish Veeramani, Daniel Scott Alessi, Benjamin Uster

The reduction of soluble hexavalent uranium to tetravalent uranium can be catalyzed by bacteria and minerals. The end-product of this reduction is often the mineral uraninite, which was long assumed to be the only product of U(VI) reduction. However, recen ...

2012

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

Elena Suvorova Buffat, Rizlan Bernier-Latmani, Harish Veeramani, Jonathan Sharp, Daniel Scott Alessi

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 accepto ...

Elsevier2011

Uranium speciation and stability after reductive immobilization in sediments

Elena Suvorova Buffat, Rizlan Bernier-Latmani, Harish Veeramani, Jonathan Sharp

It has generally been assumed that the bioreduction of hexavalent uranium in groundwater systems will result in the precipitation of immobile uraninite (UO2). In order to explore the form and stability of uranium immobilized under these conditions, we intr ...

Elsevier2011

Speciation-dependent kinetics of uranium(VI) bioreduction

Rizlan Bernier-Latmani, Harish Veeramani

The kinetics of uranium(VI) reduction by Shewanella oneidensis strain MR-1 was studied for varied pH and concentrations of dissolved inorganic carbon (DIC) and calcium. These are key variables affecting U(VI) speciation in aqueous systems. For all conditio ...

Taylor & Francis2011

Oxidative dissolution of biogenic uraninite in groundwater at Old Rifle, CO

Elena Suvorova Buffat, Rizlan Bernier-Latmani, Harish Veeramani

Reductive bioremediation is currently being explored as a possible strategy for uranium-contaminated aquifers such as the Old Rifle site (Colorado). The stability of U(IV) phases under oxidizing conditions is key to the performance of this procedure. An in ...

2011

Coupled Biogeochemical Processes for the Reduction and Immobilization of Uranium

Harish Veeramani

The substantial decrease in solubility accompanying the reduction of U(VI) to U(IV), producing the sparingly soluble mineral uraninite, is viewed as a potential mechanism for the sequestration of environmental uranium contamination. In recent years, a vari ...

EPFL2010

Non-uraninite products of microbial U(VI) reduction

Elena Suvorova Buffat, Rizlan Bernier-Latmani, Harish Veeramani, Elena Cristina Dalla Vecchia, Jonathan Sharp, Nicholas Wigginton

A promising remediation approach to mitigate subsurface uranium contamination is the stimulation of indigenous bacteria to reduce mobile U(VI) to sparingly soluble U(IV). The product of microbial uranium reduction is often reported as the mineral uraninite ...

2010

U(VI) reduction by spores of Clostridium acetobutylicum

Elena Suvorova Buffat, Rizlan Bernier-Latmani, Harish Veeramani, Elena Cristina Dalla Vecchia, Nicholas Wigginton

Vegetative cells of Clostridium acetobutylicum are known to reduce hexavalent uranium (U(VI)). We investigated the ability of spores of this organism to drive the same reaction. We found that spores were able to remove U(VI) from solution when H, was provi ...

Elsevier2010

Structural similarities between biogenic uraninites produced by phylogenetically and metabolically diverse bacteria

Elena Suvorova Buffat, Rizlan Bernier-Latmani, Harish Veeramani, Jonathan Sharp

2009

Manganese incorporation into biogenic uraninite affects its oxidative stability

Elena Suvorova Buffat, Rizlan Bernier-Latmani, Harish Veeramani, Jonathan Sharp

2009

Effect of Mn(II) on the structure and reactivity of biogenic uraninite

Elena Suvorova Buffat, Rizlan Bernier-Latmani, Harish Veeramani, Jonathan Sharp

2009

Structure, composition, size and reactivity of biogenic nano-uraninite

Elena Suvorova Buffat, Rizlan Bernier-Latmani, Harish Veeramani, Jonathan Sharp

2009

Comparative dissolution kinetics of biogenic and chemogenic uraninite under oxidizing conditions in the presence of carbonate

Rizlan Bernier-Latmani, Harish Veeramani, Jonathan Sharp

The long-term stability of biogenic uraninite with respect to oxidative dissolution is pivotal to the success of in situ bioreduction strategies for the subsurface remediation of uranium legacies. Batch and flow-through dissolution experiments were conduct ...

Elsevier2009

Harish Veeramani

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Long-term in-situ oxidation of biogenic uraninite in an alluvial aquifer: impact of dissolved oxygen and calcium

Oxidative Dissolution of Biogenic Uraninite in Groundwater at Old Rifle, CO (vol 45, pg 8748, 2011)

Quantitative separation of monomeric U(IV) from UO2 in products of U(VI) reduction

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

Uranium speciation and stability after reductive immobilization in sediments

Speciation-dependent kinetics of uranium(VI) bioreduction

Oxidative dissolution of biogenic uraninite in groundwater at Old Rifle, CO

Coupled Biogeochemical Processes for the Reduction and Immobilization of Uranium

Non-uraninite products of microbial U(VI) reduction

U(VI) reduction by spores of Clostridium acetobutylicum

Structural similarities between biogenic uraninites produced by phylogenetically and metabolically diverse bacteria

Manganese incorporation into biogenic uraninite affects its oxidative stability

Effect of Mn(II) on the structure and reactivity of biogenic uraninite

Structure, composition, size and reactivity of biogenic nano-uraninite

Comparative dissolution kinetics of biogenic and chemogenic uraninite under oxidizing conditions in the presence of carbonate

Uranyl reduction by Geobacter sulfurreducens in the presence or absence of iron

Systematic investigation of the product of microbial U(VI) reduction by different bacteria

Structure of biogenic uraninite produced by Shewanella oneidensis MR-1

Nano-scale structure and stability of biogenic uranium(IV) oxide

Dissolution of Biogenic and Synthetic UO2 under Varied Reducing Conditions