A5031855893- Wastewater Treatment and Nitrogen Removal
- Environmental remediation with nanomaterials
- Arsenic contamination and mitigation
- Water Treatment and Disinfection
- Mine drainage and remediation techniques
- Microbial bioremediation and biosurfactants
- Nanoparticles: synthesis and applications
- Enzyme-mediated dye degradation
- Membrane Separation Technologies
- Lignin and Wood Chemistry
- Chromium effects and bioremediation
- Per- and polyfluoroalkyl substances research
- Chemical Analysis and Environmental Impact
- Microbial Fuel Cells and Bioremediation
- Pharmaceutical and Antibiotic Environmental Impacts
- Toxic Organic Pollutants Impact
- Graphene and Nanomaterials Applications
- Anaerobic Digestion and Biogas Production
- Wood Treatment and Properties
- Metal Extraction and Bioleaching
- Radioactive element chemistry and processing
- Microbial Metabolism and Applications
- Extraction and Separation Processes
- Heavy metals in environment
- Microbial Community Ecology and Physiology
University of Arizona
2016-2025
Rogers (United States)
2013-2023
Oregon State University
2016
Universidad San Francisco de Quito
2009
Arizona Geological Survey
2006-2009
Environmental Education Exchange
2008
Bruker (United States)
2007
Denver Federal Center
2006
United States Geological Survey
2006
Wageningen University & Research
1990-2004
Chemolithoautotrophic denitrifying microorganisms oxidize reduced inorganic sulfur compounds coupled to the reduction of nitrate as an electron acceptor. These denitrifiers can be applied removal nitrogen and/or contamination from wastewater, groundwater, and gaseous streams. This study investigated physiology kinetics chemolithotrophic denitrification by enrichment culture utilizing hydrogen sulfide, elemental sulfur, or thiosulfate donor. Complete oxidation sulfide sulfate was observed...
Abstract Zero valent iron (ZVI) is a reactive media commonly utilized in permeable barriers (PRBs). Sulfate reducing bacteria are being considered for the immobilization of heavy metals PRBs. The purpose this study was to evaluate potential ZVI as an electron donor sulfate reduction natural mixed anaerobic cultures. ability methanogens utilize electron‐donor also explored since these microorganisms often compete with reducers common substrates. Four grades different particle sizes (1.120,...
Large quantities of arsenic are introduced into the environment through land application poultry litter containing organoarsenical feed additive roxarsone (3-nitro-4-hydroxyphenylarsonic acid). The objective this study was to evaluate bioconversion and related N-substituted phenylarsonic acid derivatives under anaerobic conditions. results demonstrate that is rapidly transformed in absence oxygen corresponding aromatic amine, 4-hydroxy-3-aminophenylarsonic (HAPA). formation HAPA attributable...
Perfluorooctane sulfonate (PFOS) and related perfluoroalkyl polyfluoroalkyl substances (PFASs) are emerging contaminants that have been widely applied in consumer industrial applications for decades. However, PFOS has raised public concern due to its high bioaccumulative character, environmental persistence, toxicity. Shorter PFASs such as perfluorobutane (PFBS) compounds proposed alternatives but it is unclear whether these fluorinated pose a risk health the environment. The objective of...
The study provides insights into the effect of carbon chain length, functional group substitutions and chemical structure on sonochemical degradation perfluoroalkyl polyfluoroalkyl substances.
Perfluorooctane sulfonate (PFOS) is under increased scrutiny as an environmental pollutant due to recent reports of its worldwide distribution, persistence, and bioaccumulation potential. The susceptibility technical PFOS branched isomers chemical reductive dehalogenation with vitamin B12 (260 µM) catalyst Ti(III)-citrate (36 mM) bulk reductant in anoxic aqueous solution at 70 °C pH 9 was evaluated this study. Defluorination confirmed by fluoride release measurements 18% PFOS, equivalent the...