A5087853860- Analytical Chemistry and Chromatography
- Analytical chemistry methods development
- Water Quality Monitoring and Analysis
- Water Treatment and Disinfection
- Toxic Organic Pollutants Impact
- Pharmaceutical and Antibiotic Environmental Impacts
- Pesticide Residue Analysis and Safety
- Per- and polyfluoroalkyl substances research
- Chromatography in Natural Products
- Atmospheric chemistry and aerosols
- Water Quality and Pollution Assessment
- Analytical Methods in Pharmaceuticals
- Air Quality Monitoring and Forecasting
- Pesticide and Herbicide Environmental Studies
- Crystallization and Solubility Studies
- Advanced Chemical Sensor Technologies
- Chemical Analysis and Environmental Impact
- Nanoparticles: synthesis and applications
- Environmental Toxicology and Ecotoxicology
- Microplastics and Plastic Pollution
- Field-Flow Fractionation Techniques
- Mass Spectrometry Techniques and Applications
- History and advancements in chemistry
- Membrane-based Ion Separation Techniques
- Water-Energy-Food Nexus Studies
Life Services (United States)
2017-2025
Tennessee Technological University
2005-2020
Park University
2018
Johns Hopkins University
2014
Auburn University
1981-1987
Southern Research Station
1982-1987
US Forest Service
1984-1987
Our knowledge of PFAS fate and transport in the urban water cycle between treatment plants (WTPs) wastewater (WWTPs) is dependent upon analytical methodology. To conduct a mass balance through these engineered systems, environmental chemistry must be leveraged to quantify various media that facilities. Although balances have been attempted across unit processes for small selection WTPs WWTPs, system-wide are daunting challenge not achieved date. The continued existence legacy constantly...
Measuring the surrogate parameters total organic carbon and dissolved (TOC/DOC) is not adequate, alone, to reveal nuances in character for optimizing treatment potable water reuse. Alternatively, analyzing each compound contributing measurement possible. As an additional analytical tool applied between these extremes, use of excitation-emission matrix fluorescence spectroscopy with PARAllel FACtor (EEM-PARAFAC) analysis was investigated this research track categories (components) or families...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLiquid chromatographic elution characteristics of some solutes used to measure column void volume on C18 bonded phasesMartha J. M. Wells and C. Randall. ClarkCite this: Anal. Chem. 1981, 53, 9, 1341–1345Publication Date (Print):August 1, 1981Publication History Published online1 May 2002Published inissue 1 August 1981https://pubs.acs.org/doi/10.1021/ac00232a009https://doi.org/10.1021/ac00232a009research-articleACS PublicationsRequest reuse...
Natural organic matter (NOM) plays key environmental roles in both aquatic and soil systems. A long‐standing approach for evaluating NOM composition activity is to extract soils with alkali solutions obtain humic substances, namely acids (HA), fulvic (FA), or briefly expose isolated fractions of dissolved alkali. Critics have claimed these methods create laboratory artifacts are thus unsuitable studying behavior field conditions. In response, we describe case studies which were analyzed...
This work evaluated the application of a novel ex-situ vacuum-enhanced anaerobic digestion technology, IntensiCarbTM (IC), which decouples hydraulic retention time (HRT) from solids (SRT), and strips ammonia at neutral pH. Four bench-scale reactors were daily fed with 50/50 (v/v) mix primary sludge (PS) thickened waste-activated (TWAS). Three operated SRT 20d intensification factors (IF = SRT/HRT) 1 (control), 2, 3, while fourth was an IF4 30d. The findings showed that OLR 5.1 ± 0.79...
Perfluoroalkyl and polyfluoroalkyl substances (PFAS) are an emerging issue in wastewater treatment. High-temperature thermal processes, incineration being time-tested, offer the opportunity to destroy change composition of PFAS. The fate PFAS has been documented through sludge incinerators, including a multiple hearth furnace (MHF) fluidized bed (FBF). dewatered feedstock averaged 247- 1280-μmol targeted per sample run MHF FBF feed, respectively. Stack emissions (reportable for all from...
Environmental Context. Worldwide, surface water is a source of drinking and recipient wastewater effluents pollutants. Many bodies undergo natural, cyclical, diurnal variation in pH between 7 9. Most treatment the United States conducted 8. The undergoing processes directly impacts ratio nonionized to ionized chemical form(s) present, which turn success rate contaminant removal. organic wastewater-derived contaminants are very soluble at 7–8 inadequately treated. Abstract. Wastewater-derived...
A series of 4- aminobenzamides some simple primary and secondary amines were prepared evaluated for anticonvulsant effects. The compounds tested in mice against seizures induced by electroshock pentylenetetrazole ( metrazole ) the rotorod assay neurologic deficit. For those N-alkyl amides tested, 4-amino-N- amylbenzamide (6) was most potent maximal (MES): ED50 = 42.98 mg/kg; however, N- cyclohexylbenzamide (8) showed greatest protective index (PI TD50/ED50), 2.8. introduction a second...
The fate and transport of diagnostic gold nanoparticles in surface waters would significantly depend on their interactions with humic substances, which are ubiquitously found natural aquatic systems. current study employs UV−visible absorbance fluorescence spectroscopy to investigate the commercial acid (HA) having a core size 5 nm coated two different stabilizers, β-d-glucose citrate. Humic substances (HS) fluorescent nature, providing unique probe nanometer-scale morphological changes for...
Water and wastewater quality research management pertaining to emerging pollutants, chemical or biological, for which discussion of occurrence surveys, fate transport investigations, treatment processes, modeling, and/or toxicity/risk assessment appearing in the peerreviewed literature during 2010, are presented.
Per- and polyfluoroalkyl substances (PFAS) are compounds of emerging concern based on ubiquitous distribution potential human health impacts. Whereas manufacturing plants fire-training/suppression areas recognized as primary sources PFAS contamination the environment, understanding role water treatment (WTPs) resource recovery facilities (WRRFs) in cycling is important. Literature presence pathways within between WTPs WRRFs was reviewed synthesized to address this knowledge gap. The...
Abstract Per‐ and polyfluoroalkyl substances (PFAS) are being studied in all environmental matrices because of their ubiquitous presence adverse human health impacts. This study conducted a surveillance 27 water resource recovery facilities throughout the United States Canada to screen range PFAS concentrations pre‐stabilized sludge post‐stabilized product. Among facilities, 82% use anaerobic digestion rest chemical stabilization and/or incineration for stabilization. Forty compounds were...
Journal Article Reversed-Phase Solid-Phase Extraction for Aqueous Environmental Sample Preparation in Herbicide Residue Analysis Get access Martha J.M. Wells, Wells U.S. Forest Service, Southern Experiment Station, Auburn University, Alabama 36849 Search other works by this author on: Oxford Academic PubMed Google Scholar Jerry L. Michael of Chromatographic Science, Volume 25, Issue 8, August 1987, Pages 345–350, https://doi.org/10.1093/chromsci/25.8.345 Published: 01 1987 history Received:...
The worldwide spread of invasive Aedes mosquitoes and arboviral disease, have renewed the pressure for effective sustainable urban mosquito control. We report on success a model we are confident will usher in new era key innovation is mobilization neighbors guided by scientific advisors, an approach termed Citizen Action through Science (Citizen AcTS). This was tested NE US town approximately 1,000 residential yards infested with Asian tiger mosquito, albopictus, major nuisance vector....
The Neuse River, North Carolina, U.S., exemplifies a typical de facto potable reuse scenario, where drinking water sources are located downstream of treated wastewater effluent discharges. study results imply that planned reuse, whether in an indirect or direct might provide better control over quality than the status quo conditions. Using fluorescence excitation-emission matrix (EEM) measurements, anthropogenic influence treatment plant (WWTP) discharge was observed samples near location...