A5038012730- Soil and Water Nutrient Dynamics
- Constructed Wetlands for Wastewater Treatment
- Hydrology and Watershed Management Studies
- Pharmaceutical and Antibiotic Environmental Impacts
- Peatlands and Wetlands Ecology
- Wastewater Treatment and Nitrogen Removal
- Coastal wetland ecosystem dynamics
- Soil erosion and sediment transport
- Water Quality and Pollution Assessment
- Insect and Pesticide Research
- Groundwater and Isotope Geochemistry
- Pesticide and Herbicide Environmental Studies
- Adsorption and biosorption for pollutant removal
- Aquatic Ecosystems and Phytoplankton Dynamics
- Environmental Conservation and Management
- Hydrology and Sediment Transport Processes
- Antibiotics Pharmacokinetics and Efficacy
- Microplastics and Plastic Pollution
- Land Use and Ecosystem Services
- Freshwater macroinvertebrate diversity and ecology
- Analytical chemistry methods development
- Flood Risk Assessment and Management
- Fish Ecology and Management Studies
- Wastewater Treatment and Reuse
- Per- and polyfluoroalkyl substances research
University of Kentucky
2020-2025
University of Nebraska–Lincoln
2017-2021
North Carolina State University
2012-2019
Agricultural Research Service
2019
East Carolina University
2019
Neonicotinoids have been the most commonly used insecticides since early 1990s. Despite their efficacy in improving crop protection and management, these agrochemicals gained recent attention for negative impacts on non-target species such as honeybees aquatic invertebrates. In years, neonicotinoids detected rivers streams across world. Determining predicting exposure potential of surface water requires a thorough understanding fate transport mechanisms. Therefore, our objective was to...
Abstract Land-applied municipal biosolids, produced from wastewater treatment sludge, contributes to microplastics contamination in agroecosystems. The impacts of biosolids on microplastic concentrations agricultural soil have been previously investigated, however, the potential for transport biosolid-amended croplands has not quantified. In this study, manure and were applied field plots, runoff was collected following natural precipitation events bacterial biofilm grow different...
Cr( vi ) is toxic to human health and aquatic life, requiring removal from contaminated water.
The presence of Cr(VI) results in pollution that threatens human health and aquatic life. Therefore, there is an urgent need for to be removed from contaminated water. mussel shell incorporated polyethersulfone (MSPES) membranes designed form the flat sheet adsorptive membrane (FSAM) crossflow treatment systems was used remove synthetic solution. physicochemical properties MSPES were verified using atomic force microscope, scanning electron water contact angle goniometer. performance...
Abstract. Excess nutrients from agricultural settings contribute to surface water and groundwater impairment. Constructed wetlands have been widely used for quality protection in various systems. We a synthesis approach document the performance of constructed nutrient removal range landscapes geographic regions with following objectives: (1) review current use applications, (2) summarize efficiency wetlands, (3) identify usage costs associated wetlands. reviewed over 130 publications reports...
Excess nutrients and herbicides remain two major causes of waterbody impairment globally. In an attempt to better understand pollutant sources in the Big Sandy Creek Watershed (BSCW) prospects for successful remediation, a program was initiated assist agricultural producers with implementation best management practices (BMPs). The objectives were (1) simulate BMPs within hotspots determine reductions loads (2) if water-quality standards are met at watershed outlet. Regression-based load...
Given the ubiquitous detection of per- and polyfluoroalkyl substances (PFAS) within numerous soil water environmental compartments, there is a need for global understanding current methodologies extracting water, solids, polar organic chemical integrative samplers (POCIS), plant tissue these substances. This study provides details several extraction methods, demonstrates use POCIS in monitoring compounds wastewater environment, evidence detectable levels certain PFAS Midwestern...
The influences of dissolved organic matter (DOM) on neonicotinoid photochemical degradation and product formation in natural waters remain unclear, potentially impacting the sustainability river systems. Therefore, our overall objective was to investigate photodegradation mechanisms phototransformation byproducts two pesticides, imidacloprid thiamethoxam, under simulated sunlight at microcosm scale, assess implications DOM for insecticide rivers. Direct indirect photolysis were investigated...
The objective of the study was to determine kinetic model that best fit observed nitrate removal rates at mesocosm scale in order ideal loading for two future wetland restorations slated receive pulse flow agricultural drainage water. Four models were investigated: zero order, first decay, efficiency loss, and Monod. Wetland mesocosms constructed using primary soil type (in triplicate) each restoration sites. Eighteen experiments conducted over years across seasons. Simulated water loaded...
The use of wetlands as a treatment approach for nitrogen in runoff is common practice agroecosystems. However, nitrate not the sole constituent present agricultural and other biologically active contaminants have potential to affect removal efficiency. In this study, impacts combined effects four veterinary antibiotics (chlortetracycline, sulfamethazine, lincomycin, monensin) on nitrate-N efficiency saturated sediments were evaluated coupled microcosm/mesocosm scale experiment. Veterinary...