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Grants
  • Funding agency logo
    Analysis of Groundwater Flow and Uranium Sorption Properties of Tnbs1/Tnbs0 Bedrock Core From The Lawrence Livermore National Laboratory Site 300 Building 812 Area

    Co-Investigator (COI)

    2020

    $70.0K
    Active
  • Funding agency logo
    High Rate Degradation of 3-Nitro-1,2,4-triazol-5-one (NTO) to Environmentally Benign End Products in Sequential Reducing-Oxidizing Reactive Mineral Packed Bed Reactors

    Co-Investigator (COI)

    2019

    $678.6K
    Active
  • Funding agency logo
    Risk and Remediation of Metal-Mining Wastes

    Co-Investigator (COI)

    2017

    $543.5K
  • Funding agency logo
    Advancing Informal Environmental STEM Literacy & Learning: Co-Created Citizen Science Rainwater Harvesting in Underserved Communities

    Co-Investigator (COI)

    2016

    $2.3M
  • Funding agency logo
    Hazardous Waste Risk and Remediation in the US Southwest

    Co-Investigator (COI)

    2015

    $3.0M
News
  • Environmental Impact: Rendering Toxic Explosives Harmless

    2019

  • Project Addresses Food Safety for Southern Arizona Families

    2016

Publications (67)
Recent
  • Molecular speciation controls arsenic and lead bioaccessibility in fugitive dusts from sulfidic mine tailings

    2022

  • Metal Lability and Mass Transfer Response to Direct-Planting Phytostabilization of Pyritic Mine Tailings

    2022

  • Reductive transformation of the insensitive munitions compound nitroguanidine by different iron-based reactive minerals

    2022

  • Amino Acid Glycine Observed within Sodium Chloride Precipitates: Laboratory Analysis of Ceres Analogues

    2022

  • Minding the gap: socio-demographic factors linked to the perception of environmental pollution, water harvesting infrastructure, and gardening characteristics

    2022

  • span style= font-size:11pt; Amino Acid Glycine Observed within Sodium Chloride Precipitates: Laboratory Analysis of Ceres Analogues /span

    2022

  • Phosphate controls uranium release from acidic waste-weathered Hanford sediments

    2021

  • Iron(II) monosulfide (FeS) minerals reductively transform the insensitive munitions compounds 2,4-dinitroanisole (DNAN) and 3-nitro-1,2,4-triazol-5-one (NTO)

    2021

  • Experimental weathering of a volcaniclastic critical zone profile: Key role of colloidal constituents in aqueous geochemical response

    2021

  • Distance-dependence from volcano for Asian dust inclusions in Andosols: A key to control soil ability to retain radiocesium

    2021

  • The Role of Manganese Dioxide in the Natural Formation of Organochlorines

    2021

  • Biochar-templated surface precipitation and inner-sphere complexation effectively removes arsenic from acid mine drainage

    2021

  • Resolving Deep Critical Zone Architecture in Complex Volcanic Terrain

    2020

  • Arsenic and iron speciation and mobilization during phytostabilization of pyritic mine tailings

    2020

  • Environmental monitoring and exposure science dataset to calculate ingestion and inhalation of metal(loid)s through preschool gardening

    2020

  • SPECIATION AND BIOACCESSIBILTY OF PARTICULATE MATTER FROM LEGACY MINE TAILINGS

    2020

  • Ingestion and Inhalation of Metal(loid)s Through Preschool Gardening: An Exposure and Risk Assessment in Legacy Mining Communities

    2019

  • Soil Microbiome Dynamics During Pyritic Mine Tailing Phytostabilization: Understanding Microbial Bioindicators of Soil Acidification

    2019

  • RESOLVING CRITICAL ZONE STRUCTURE AND WEATHERING PROFILES ACROSS A GEOLOGICALLY COMPLEX SUB-ALPINE WATERSHED

    2019

  • Partnering for action: community monitoring of harvested rainwater in underserved, rural, and urban Arizona communities

    2019

  • Rare earth elements (REY) sorption on soils of contrasting mineralogy and texture

    2019

  • Data_Sheet_1_Soil Microbiome Dynamics During Pyritic Mine Tailing Phytostabilization: Understanding Microbial Bioindicators of Soil Acidification.docx

    2019

  • Oxidation of reduced daughter products from 2,4-dinitroanisole (DNAN) by Mn(IV) and Fe(III) oxides

    2018

  • Abiotic reduction of insensitive munition compounds by sulfate green rust

    2018

  • Oxidative Weathering Decreases Bioaccessibility of Toxic Metal(loid)s in PM10 Emissions From Sulfide Mine Tailings

    2018

  • Wet–dry cycles impact DOM retention in subsurface soils

    2018

  • Adsorption and oxidation of 3-nitro-1,2,4-triazole-5-one (NTO) and its transformation product (3-amino-1,2,4-triazole-5-one, ATO) at ferrihydrite and birnessite surfaces

    2018

  • Treatment impacts on temporal microbial community dynamics during phytostabilization of acid-generating mine tailings in semiarid regions

    2018

  • CONTINUOUS MONITORING OF SOIL AND ECOSYSTEM RESPIRATION IN A SEMI-ARID HIGH-ELEVATION CRITICAL ZONE OBSERVATORY

    2018

  • Trapping of lead (Pb) by corn and pea root border cells

    2018

  • Oxidative weathering decreases bioaccessibility of toxic metal(loid)s in PM emissions from sulfide mine tailings

    2018

  • Immobilization of Rhus vernicifera laccase on sepiolite; effect of chitosan and copper modification on laccase adsorption and activity

    2018

  • COUPLING BETWEEN SOIL RESPIRATION AND GEOCHEMICAL REACTIONS IN THE JEMEZ RIVER BASIN CRITICAL ZONE OBSERVATORY

    2018

  • Organic acid effect on arsenate bioaccessibility in gastric and alveolar simulated biofluid systems

    2018

  • DECONVOLVING LEGACY AND CONTEMPORANEOUS WEATHERING IN A PORPHYRITIC RHYOLITE AND RHYOLITIC TUFF DOMINATED UPLAND CATCHMENT, VALLES CALDERA, NEW MEXICO

    2018

  • A XANES and Raman Investigation of Sulfur Speciaiton and Structural Order in Murchison and Allende Meteorites

    2017

  • Wet-dry cycles impact DOM retention in subsurface soils

    2017

  • A XANES and Raman investigation of sulfur speciation and structural order in Murchison and Allende meteorites

    2017

  • Bacterial Rhizoplane Colonization Patterns of Buchloe dactyloides Growing in Metalliferous Mine Tailings Reflect Plant Status and Biogeochemical Conditions

    2017

  • Supplementary material to "Wet-dry cycles impact DOM retention in subsurface soils"

    2017

  • Mechanisms of Arsenic Sequestration by Prosopis juliflora during the Phytostabilization of Metalliferous Mine Tailings

    2017

  • Resolving colocalization of bacteria and metal(loid)s on plant root surfaces by combining fluorescence in situ hybridization (FISH) with multiple-energy micro-focused X-ray fluorescence (ME μXRF)

    2016

  • Phytostabilization of mine tailings using compost-assisted direct planting: Translating greenhouse results to the field

    2016

  • Arsenic remediation by formation of arsenic sulfide minerals in a continuous anaerobic bioreactor

    2016

  • Pore water chemistry reveals gradients in mineral transformation across a model basaltic hillslope

    2016

  • Analyzing patterns of community interest at a legacy mining waste site to assess and inform environmental health literacy efforts

    2016

  • Soil Lysimeter Excavation for Coupled Hydrological, Geochemical, and Microbiological Investigations

    2016

  • Dissecting the Hydrobiogeochemical Box

    2015

  • Abundance and Activity of 16S rRNA, AmoA and NifH Bacterial Genes During Assisted Phytostabilization of Mine Tailings

    2015

  • Toxic metal(loid) speciation during weathering of iron sulfide mine tailings under semi-arid climate

    2015

  • Influence of Organic Matter - Mineral Interfacial Reactions on Metal(loid) Speciation and Bioaccessibility

    2015

  • Biogeochemistry of metalliferous mine tailings during phytostabilization

    2015

  • Bioaccessibility, release kinetics, and molecular speciation of arsenic and lead in geo-dusts from the Iron King Mine Federal Superfund site in Humboldt, Arizona

    2014

  • Abundance and Activity of 16S rRNA, <i>AmoA</i> and <i>NifH</i> Bacterial Genes During Assisted Phytostabilization of Mine Tailings

    2014

  • Microbial Diversity and Metal Speciation Changes in Mine Tailings Following Compost-Assisted Direct Planting: A Four-Year Superfund Site Field Study

    2014

  • Biomineralization of arsenate to arsenic sulfides is greatly enhanced at mildly acidic conditions

    2014

  • Surficial weathering of iron sulfide mine tailings under semi-arid climate

    2014

  • Environmental factors influencing the structural dynamics of soil microbial communities during assisted phytostabilization of acid-generating mine tailings: A mesocosm experiment

    2014

  • Microscale speciation of arsenic and iron in ferric-based sorbents subjected to simulated landfill conditions

    2013

  • Effect of silicic acid on arsenate and arsenite retention mechanisms on 6-L ferrihydrite: A spectroscopic and batch adsorption approach

    2013

  • Response of Key Soil Parameters during Compost-Assisted Phytostabilization in Extremely Acidic Tailings: Effect of Plant Species

    2012

  • Speciation and natural attenuation of arsenic and iron in a tidally influenced shallow aquifer

    2009

  • A gel probe equilibrium sampler for measuring arsenic porewater profiles and sorption gradients in sediments: II. Field application to Haiwee reservoir sediment

    2008

  • A gel probe equilibrium sampler for measuring arsenic porewater profiles and sorption gradients in sediments: I. Laboratory development

    2008

  • Arsenic sequestration by sorption processes in high-iron sediments

    2007

  • The influence of sulfur and iron on dissolved arsenic concentrations in the shallow subsurface under changing redox conditions

    2004

  • X-ray absorption spectroscopic study of Fe reference compounds for the analysis of natural sediments

    2004

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