❝
Dr. Pepper is an environmental microbiologist whose research has focused on the fate and transport of pathogens in air, water, soils and municipal wastes. More recently, he has investigated the potential for real-time detection of contaminants in water distribution systems. Dr. Pepper is Professor in the Community, Environment, and Policy Department in the UA College of Public Health, as well as Professor in the Department of Agricultural & Biosystems Engineering. In addition to his duties at the WEST Center, he is director of the National Science Foundation Water Quality Center at the UA. He also teaches a graduate level laboratory class on Environmental Microbiology, and an undergraduate class on Pollution Science. He has co-authored numerous books and journal articles on Environmental Microbiology and Pollution Science, and is a fellow of the American Association for the Advancement of Science, the American Academy of Microbiology, the American Society of Agronomy, and the Soil Science Society of America. He received his Ph.D. in Soil Microbiology from The Ohio State University, M.S. in Soil Biochemistry from Ohio State, and B.S. in Chemistry from the University of Birmingham, Great Britain.Show Less
VOSviewer
Courses
- PSPollution Science
Grants
- Evaluation of Yokogawas RAPID technology for allocation of log reduction levels of viruses in water using a novel engineering-scale ultrafiltration system.
Co-Investigator (COI)
2023
$100.0K
Active - Is Land Application of Biosolids a Significant Source of Human PFAS Exposure?
Principal Investigator (PI)
2023
$25.0K
Active - Water and Environmental Technology (WET) Center - Membership Agreement
Principal Investigator (PI)
2022
$50.0K
Active - Advancing Safety and Reliability to Protect Public Health: Identifying Quantitative Reductions of Viral Pathogens and Surrogates for Water Reuse Applications
Co-Investigator (COI)
2021
$1.1M
Active - Assessment of SARS-CoV-2 Viability and Persistence in Sewage Samples across the United States Using In Vitro Cell Culture and Molecular Methods
Co-Investigator (COI)
2021
$349.7K
Active - Water and Environmental Technology (WET) Center - Membership Agreement
Principal Investigator (PI)
2021
$127.0K
Active - Evaluation of Soil Health via Analysis of Soil Microbiome and Functional Activity
Principal Investigator (PI)
2020
$494.7K
Active - Water and Environmental Technology (WET) Center - Membership Fees
Principal Investigator (PI)
2020
$50.0K
Active - Efficacy of ChemFree H20 Technology as a Bacteriostatic Agent in Water
Principal Investigator (PI)
2017
$110.0K
Active - WEST Membership Fees
Principal Investigator (PI)
2015
$918.0K
Active
News
- ABOR Confirms 6 New Regents Professors at UArizona
2021
- Student-Produced Documentary Chronicles UArizona Success Taming COVID-19 Through Wastewater
2021
- University, County Work Together at 'Critical Time' for COVID-19 Mitigation
2020
- COVID-19, Asteroid Dust and Crane Flies: UArizona's Top Stories of 2020
2020
- UArizona President Urges Continued Diligence to Control COVID-19 Spread
2020
- UArizona Partners With Community on COVID-19 Efforts
2020
- UArizona Researchers Pivot to Tackle COVID-19
2020
- UArizona to Ramp Up COVID-19 Testing
2020
- Pure Water Brew Challenge Brings Reclamation to the Forefront
2017
- New WEST Center to Address Water Issues
2015
- UA, Pima County Unite on Water-Energy Sustainability
2013
- Treated Biosolids Safe for Agricultural Uses
2010
- Why Nice Guys Usually Get the Girls
2009
- Stopping Germs From Ganging Up on Humans
2008
- Why Don't We Get Cancer All the Time?
2007
- Seven UA Scientists Named AAAS Fellows
2006
- It Takes a Village to Test Your Water
2005
- Advertisers Honor UA Alumnus
2004
- Mine Tailings Restoration
2003
- Biosolids Safe for Land Application, UA Researchers Find
2003
- The Hunt for Hazards in Drinking Water
2000
- Year in Review 1999: New VP Research Comments on First Year
1999
- UArizona researchers to help track deadly fungus in Arizona wastewater
- UArizona researchers to help track deadly fungus in Arizona wastewater
- UArizona researchers to help track deadly fungus in Arizona wastewater
- UArizona researchers to help track deadly fungus in Arizona wastewater
- UArizona researchers to help track deadly fungus in Arizona wastewater
- UArizona researchers to help track deadly fungus in Arizona wastewater
- UArizona researchers to help track deadly fungus in Arizona wastewater
- UArizona researchers to help track deadly fungus in Arizona wastewater
Publications (194)
Recent
- Optimization of a magnetic water treatment device for the control of Pseudomonas biofilms
2021
- Enumerating asymptomatic Covid cases and estimating SARS-CoV-2 fecal shedding rates via wastewater based epidemiology
2021
- The AMP Index as an indicator of the Physiological status of the soil microbial community
2021
- Pilot scale investigation of the effects of a magnetic water treatment device in pool systems on chlorine demand
2021
- Incidence of PFAS in soil following long-term application of Class B biosolids: A Southern Arizona Case Study
2021
- Influence of demographic factors and stages of the COVID-19 Pandemic on SARS-CoV-2 fecal shedding rates in wastewater
2021
- COVID-19 containment on a college campus via wastewater-based epidemiology, targeted clinical testing and an intervention
2021
- Reduction of erythromycin resistance gene erm (F) and Class 1 integran-intergrase genes in wastewater by Bardenpho treatment
2020
- Comparative Assessment of BGM and PLC/PRF/5 Cell Lines for Enteric Virus Detection in Biosolids
2019
- Assessing the spatial and temporal variability of bacterial communities in two Bardenpho wasterwater treatment systems via Illumini MiSeq sequencing
2019
- Potential Indicators of Virus Transport and Removal during Soil Aquifer Treatment of Treated Wastewater Effluent
2019
- Comparative survival of viruses during thermophilic and mesophilic anaerobic digestion
2018
- Effects ofsubsurface banding and broadcst of poultry litter and cover crop on soil microbial populations
2018
- Evaluation of hospital -grade disinfectants on viral deposition on surfaces after toilet flushing
2018
- Fate of endocrine disruptors and flame retardants during land application of biosolids
2018
- Comparative Survival of Viruses during Thermophillic and Mesophillic Anaerobic Digestion
2018
- Risk of infection from legionella associated with spray irrigation of reclaimed water
2018
- Antibiotic Resistant Bacteria in Municipal Wastes: Is there reason for concern?
2018
- reduction of Crypyosporidium, giardia, and fecal indicators by Bardenpho wastewater treatment
2018
- Near real-time detection of E.coli in reclaimed water
2018
- Removal of fecal indicator bacteria and antibiotic resistant genes in constructed wetlands
2018
- Online sensor monitoring for chemical contaminant attenuation during UV/H2O2 advanced oxidation process
2018
- Anammox for sidestream treatmento of wastewater effluent
2018
- Virus reduction during advanced Bardenpho and conventional wastewater treatment processes
2016
- A method for determining Ascaris viability based on early-to-late stage in vitro ova development
2016
- Evaluating the Efficacy of Ebola Human Waste Management Practices for Disposal in Toilets
2016
- Enteric and indicator virus removal by surface flow wetlands
2016
- Inactivation of MS2 Coliphage by UV and Hydrogen Peroxide: Comparison by Cultural and Molecular Methodologies
2014
- Online monitoring of Escherichia coli and Bacillus thuringiensis spore inactivation after advanced oxidation treatment
2014
- Relative Abundance and Treatment Reduction of Viruses During Wastewater Treatment Processes - Identification of Potential Viral Indicators
2014
- Assessment of virus removal by managed aquifer recharge at three full-scale operations
2014
- Rapid Detection Technologies for Monitoring MIcroorganisms in Water
2014
- The soil health-human health nexus
2013
- Survival of Infectious Prions During Anaerobic Digestion of Municipal Sewage Sludge and Lime Stabilization of Class B Biosolids
2013
- Evaluation of Real-time Water Quality Sensors for the Detection of Intentional Spore Contamination of Potable Water
2013
- Evaluation of commercial kits for the extraction and purification of viral nucleic acids from environmental and fecal samples
2013
- Evaluation of Commercial Kits for the Extraction aqnd Purification of Viral Nucleic cids from Environmental and Fecal Samples
2013
- The Soil Health - Human Health Nexus
2013
- Influence of Residence Time of Reclaimed Water Within Distribution Systems on Water Quality
2013
- Land Application of Manure and Class B Biosolids: An Occupational and Public Quantitative Microbial Risk Assessment
2012
- Revegetation of Copper Mine Tailings Through Land Application of Biosolids: Long-Term Monitoring
2012
- International Science in the National Interest at the U.S. Geological Survey
2012
- Bacterial Populations within Copper Mine Tailings: Long-Term Effects of Amendments with Class A Biosolids
2012
- Survival of Ascaris ova in desert soils: A risk assessment
2012
- Bacterial populations within copper mine tailings: Long-term effects of amendment with Class A biosolids
2012
- Real time monitoring for pathogens in water
2012
- Survival of infectious prions in Class B biosolids
2011
- Evaluation of Select Sensors for Real-time Monitoring of Escherichia coli in Water Distribution Systems
2011
- Efficiency of ASTM Method D4994-89 for Recovery of Enteric Viruses from Biosolids
2011
- The SMART parameter database for quantitative microbial risk assessments
2011
- Survival of Infectious Prions in Water
2011
- Influence of long-term land application of Class B biosolids on soil bacterial diversity
2010
- Real time monitoring of E.coli within potable water distributions systems
2010
- Long-term effects of land application of class B biosolids on the soil microbial populations, pathogens, and activity
2010
- Water distribution systems as living ecosystems: Impact on taste and odor
2010
- Pathogens and indicators in united states class B biosolids: National and historic distributions
2010
- Long-term effects of land application of class B biosolids on soil chemical properties
2010
- Comparison of Multiple Passage Integrated Cell Culture-PCR and Cytopathogenic Effects in Cell Culture for the Assessment of Poliovirus Survival in Water
2010
- Point-of-use drinking water devices for assessing microbial contamination in finished water and distribution systems
2009
- Introduction to Environmental Microbiology
2009
- Cultural Methods
2009
- Application of PCR-based methods to assess the infectivity of enteric viruses in environmental samples
2009
- Microbial Transport
2009
- Senescence as an adaptation to limit the spread of disease
2009
- Microorganisms and Bioterrorism
2009
- Wastewater Treatment and Biosolids Reuse
2009
- Microbial Communication: Bacteria-Bacteria and Bacteria-Host
2009
- Earth Environments
2009
- Domestic and Indoor Microbiology
2009
- Bacterial Communities in Natural Ecosystems
2009
- Environmental Microbiology
2009
- Aeromicrobiology
2009
- Environmental Sample Collection and Processing
2009
- Microorganisms and Metal Pollutants
2009
- Microorganisms
2009
- Soil: A public health threat or savior?
2009
- Microscopic Techniques
2009
- Global Change and Microbial Infectious Disease
2009
- Sustainability of land application of Class B biosolids
2008
- Exposure and risk assessment of Salmonella in recycled residuals
2008
- Estimated occupational risk from bioaerosols generated during land application of class B biosolids
2008
- Influence of DOC on MS-2 bacteriophage transport in a sandy soil
2007
- Occurrence of antibiotic-resistant bacteria and endotoxin associated with the land application of biosolids
2007
- Assessment of Salmonella typhimurium growth in class a biosolids and soil/biosolid mixtures
2007
- Diversity of aerosolized bacteria during land application of biosolids
2007
- Mineralisation of atrazine, metolachlor and their respective metabolites in vegetated filter strip and cultivated soil
2006
- The measurement of aerosolized endotoxin from land application of Class B biosolids in Southeast Arizona
2006
- Pathogens in Biosolids
2006
- Leaching of phage from Class B biosolids and potential transport through soil
2006
- Expression of gentisate 1,2-dioxygenase (gdoA) genes involved in aromatic degradation in two haloarchaeal genera
2006
- Estimation of bioaerosol risk of infection to residents adjacent to a land applied biosolids site using an empirically derived transport model
2005
- Potential regrowth and recolonization of salmonellae and indicators in biosolids and biosolid-amended soil
2005
- A national study on the residential impact of biological aerosols from the land application of biosolids
2005
- Contribution of drinking water to the weekly intake of heterotrophic bacteria from diet in the United States
2005
- Development of a method for the concentration and recovery of microsporidia from tap water
2005
- Bioaerosol emission rate and plume characteristics during land application of liquid class B biosolids
2005
- Chlorobenzoate-degrading bacteria in similar pristine soils exhibit different community structures and population dynamics in response to anthropogenic 2-, 3-, and 4-chlorobenzoate levels
2004
- New approaches for bioaugmentation as a remediation technology
2004
- Real-time PCR quantification of a green fluorescent protein-labeled, genetically engineered Pseudomonas putida strain during 2-chlorobenzoate degradation in soil
2004
- Functional establishment of introduced chlorobenzoate degraders following bioaugmentation with newly activated soil. Enhanced contaminant remediation via activated soil bioaugmentation
2004
- Bioaerosols from the land application of biosolids in the desert southwest USA
2004
- Tracking the concentration of heterotrophic plate count bacteria from the source to the consumer's tap
2004
- Comment on Evidence for the Absence of Staphylococcus aureus in the Land Applied Biosolids [1] (multiple letters)
2003
- Evidence for the absence of Staphylococcus aureus in land applied biosolids
2003
- Development and optimization of a quantitative cell culture infectivity assay for the microsporidium Encephalitozoon intestinalis and application to ultraviolet light inactivation
2003
- Confirmed detection of Cyclospora cayetanesis, Encephalitozoon intestinalis and Cryptosporidium parvum in water used for drinking.
2003
- The role of cell bioaugmentation and gene bioaugmentation in the remediation of co-contaminated soils
2002
- Detection of protozoan parasites and microsporidia in irrigation waters used for crop production
2002
- Dispersal of plasmid pJP4 in unsaturated and saturated 2,4-dichlorophenoxyacetic acid contaminated soil
2002
- Application of a reverse transcription-PCR assay to monitor regulation of the catabolic nahAc gene during phenanthrene degradation
2002
- Incidence of Bacillus anthracis in soil
2002
- The role of selective pressure and selfish DNA in horizontal gene transfer and soil microbial community adaptation
2002
- A risk assessment of emerging pathogens of concern in the land application of biosolids
2002
- ICC/PCR detection of enteroviruses and hepatitis A virus in environmental samples
2001
- Dual-bioaugmentation strategy to enhance remediation of cocontaminated soil
2001
- Soil microbial population dynamics following bioaugmentation with a 3-chlorobenzoate-degrading bacterial culture. Bioaugmentation effects on soil microorganisms
2001
- Use of integrated cell culture-PCR to evaluate the effectiveness of poliovirus inactivation by chlorine
2000
- Environmental science: A new opportunity for soil science
2000
- Detection and characterization of plasmid pJP4 transfer to indigenous soil bacteria
2000
- Bioaerosol transport modeling and risk assessment in relation to biosolid placement
2000
- Comparison of 2,4-dichlorophenoxyacetic acid degradation and plasmid transfer in soil resulting from bioaugmentation with two different pJP4 donors
2000
- Evaluation of methodologies including immunofluorescent assay (IFA) and the polymerase chain reaction (PCR) for detection of human pathogenic microsporidia in water
1999
- Microbial responses to environmentally toxic cadmium
1999
- Incidence of enteroviruses in Mamala Bay, Hawaii using cell culture and direct polymerase chain reaction methodologies
1998
- An evaluation of DNA-based methodologies for subtyping Salmonella
1998
- An evaluation of ERIC PCR and AP PCR fingerprinting for discriminating Salmonella serotypes
1998
- PCR amplification and species determination of microsporidia in formalin-fixed feces after immunomagnetic separation
1998
- Confirmation of the human-pathogenic microsporidia Enterocytozoon bieneusi, Encephalitozoon intestinalis, and Vittaforma corneae in water
1998
- Use of an arbitrarily primed PCR product in the development of a Campylobacter jejuni-specific PCR
1997
- Characterization and quantification of bacterial pathogens and indicator organisms in household kitchens with and without the use of a disinfectant cleaner
1997
- Variability in presence-absence scoring of AP PCR fingerprints affects computer matching of bacterial isolates
1997
- Rapid PCR-based monitoring of infectious enteroviruses in drinking water
1997
- A method for the detection and quantitation of PCR template in environmental samples by high performance liquid chromatography
1997
- Detection of viable Giardia cysts by amplification of heat shock- induced mRNA
1997
- Field-scale biofiltration of gasoline vapors extracted from beneath a leaking underground storage tank
1997
- Survival of Giardia, Cryptosporidium, poliovirus and Salmonella in marine waters
1997
- Detection of infectious enteroviruses by an integrated cell culture-PCR procedure
1996
- Plasmid diversity within a 2,4-dichlorophenoxyacetic acid-degrading Variovorax paradoxus population isolated from a contaminated soil
1996
- Gene transfer of Alcaligenes eutrophus JMP134 plasmid pJP4 to indigenous soil recipients
1996
- Increased sensitivity of poliovirus detection in tap water concentrates by reverse transcriptase-polymerase chain reaction
1995
- Detection of enteroviruses in marine waters by direct RT-PCR and cell culture
1995
- Detection of Giardia and Cryptosporidium in marine waters
1995
- Removal of PCR inhibiting substances in sewage sludge amended soil
1995
- Comparison of PCR and cell culture for detection of enteroviruses in sludge-amended field soils and determination of their transport
1995
- Optimization of arbitrarily primed PCR for the identification of bacterial isolates
1995
- Metal contamination on soil microorganisms
1994
- Cell culture and PCR determination of poliovirus inactivation by disinfectants
1994
- Effect of anaerobic digestion on the occurrence of enteroviruses and Giardia cysts in sewage sludge
1994
- A method to detect enteroviruses in sewage sludge-amended soil using the PCR
1994
- Measuring bacterial contaminants in ultrapure water. A rapid analytical method
1994
- Detection of naturally occurring enteroviruses and hepatitis A virus in undigested and anaerobically digested sludge using the polymerase chain reaction
1994
- Detection of enteroviruses in groundwater with the polymerase chain reaction
1993
- Specific detection of Salmonella spp. by multiplex polymerase chain reaction
1993
- Rapid and systematic analytical method for measuring bacterial contaminants in ultrapure water
1993
- Soil microbial activity as an indicator of soil fertility: Long-term effects of municipal sewage sludge on an arid soil
1993
- Survival of indicator organisms in Sonoran Desert soil amended with sewage sludge
1993
- Poliovirus detection in water by cell culture and nucleic acid hybridization
1993
- Comparison of poliovirus detection in water by cell culture and nucleic acid hybridization
1993
- Polymerase chain reaction detection of nonviable bacterial pathogens
1993
- Biodegradation, sorption, and transport of 2,4-dichlorophenoxyacetic acid in saturated and unsaturated soils
1993
- Virus survival in sewage sludge amended desert soil
1993
- Hazards from pathogenic microorganisms in land-disposed sewage sludge
1993
- Specific detection of rhizobia in root nodules and soil using the polymerase chain reaction
1992
- Persistence of viruses in desert soils amended with anaerobically digested sewage sludge
1992
- Denitrification activity in the root zone of a sludge-amended desert soil
1992
- Recovery of poliovirus from sludge-amended soils
1992
- Longterm influence of liquid sewage sludge on the organic carbon and nitrogen content of a furrow-irrigated desert soil
1992
- Polymerase chain reaction and gene probe detection of the 2,4-dichlorophenoxyacetic acid degradation plasmid, pJP4
1992
- Transposon Tn 5 as an identifiable marker in rhizobia: Survival and genetic stability of Tn 5 mutant bean rhizobia under temperature stressed conditions in desert soils
1991
- Rapid method for processing soil samples for polymerase chain reaction amplification of specific gene sequences
1991
- Competitiveness of KIM 5 and VIKING 1 bean rhizobia: Strain by cultivar interactions
1991
- Fecal coliforms in soil detected by polymerase chain reaction and DNA-DNA hybridizations
1991
- Nitrogen fixation by desert legumes associated with Rhizobia
1991
- Wheat responds to sewage sludge as fertilizer in an arid environment
1990
- Survival of Tn5 mutant bean rhizobia in desert soils: Phenotypic expression of Tn5 under moisture stress
1990
- Soil respiration as an index of soil aeration
1990
- Identification of dominant indigenous Rhizobium meliloti by plasmid profiles and intrinsic antibiotic resistance
1990
- Strain identification of highly-competitive bean rhizobia isolated from root nodules: Use of fluorescent antibodies, plasmid profiles and gene probes
1989
- Physiological and biochemical characteristics of a fast-growing strain of lupin rhizobia isolated from the sonoran desert
1988
- Liquid sludge as fertilizer for wheat
1988
- Survival of a fast-growing strain of lupin rhizobia in sonoran desert soils
1988
- AMMONIUM RETENTION IN SAND AMENDED WITH CLINOPTILOLITE.
1987
- Inoculation of leguminous trees with rhizobia and VA mycorrhizal fungi
1986
- Mesquite rhizobia isolated from the Sonoran Desert: Competitiveness and survival in soil
1985
- Mesquite rhizobia isolated from the Sonoran Desert: Physiology and effectiveness
1985
- Yields and leaf elemental composition of cotton grown on sludge-amended soil
1985
- Competitiveness and effectiveness of strains of Rhizobium phaseoli isolated from the sonoran desert
1984
- Microbial production of ethylene in desert soils
1984
- Silage corn uptake of sludge-applied zinc and cadmium as affected by soil pH
1983
- The effect of cadmium on nodulation and N sub 2 /sub (C sub 2 /sub H sub 2 /sub )-fixation by dry beans (Phaseolus vulgaris L.)
1981
- Reclamation of wastewater with a soil-turf filter. II. Removal of phosphorus, boron, sodium and chlorine
1981
- BLANEY-CRIDDLE COEFFICIENTS FOR WESTERN TURF GRASSES.
1981
- Reclamation of wastewater with a soil-turf filter. I. Removal of nitrogen
1981