A5065201886- Per- and polyfluoroalkyl substances research
- Atmospheric chemistry and aerosols
- Toxic Organic Pollutants Impact
- Environmental remediation with nanomaterials
- Groundwater flow and contamination studies
- Engineering and Material Science Research
- Coal and Its By-products
- Phosphorus and nutrient management
- Carbon Dioxide Capture Technologies
- Pharmaceutical and Antibiotic Environmental Impacts
- Scientific Measurement and Uncertainty Evaluation
- Microbial bioremediation and biosurfactants
- Inorganic Fluorides and Related Compounds
- Nuclear and radioactivity studies
- Gas Sensing Nanomaterials and Sensors
- Water Quality and Resources Studies
- Industrial Gas Emission Control
- Environmental Toxicology and Ecotoxicology
- Cyclone Separators and Fluid Dynamics
- Wastewater Treatment and Reuse
- Nanomaterials for catalytic reactions
- Pesticide and Herbicide Environmental Studies
- Subcritical and Supercritical Water Processes
- Fiber-reinforced polymer composites
- Water Resources and Management
Brown and Caldwell (United States)
2016-2025
Hudson Institute
2021
ORCID
2021
John Wiley & Sons (United States)
2021
University of Minnesota
2007
University of Maryland Eastern Shore
1984
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...
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...
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...
Abstract The photosynthetic inhibitory effect of atrazine (2‐chloro‐4‐ethylamino‐6‐isopropyl amino‐1,3,5‐triazine) and three its major metabolites (deethylated, deisopropylated, hydroxyatrazine) were determined for four species submerged macrophytes: Potamogeton perfoliatus L., Ruppia maritima Myriophyllum spicatum Zannichellia palustris L. showed a similar response to varied dosages the parent compound with an average I 1 (concentration at which photosynthesis is inhibited by 1%) 20 µ g/L...
Abstract Per‐ and polyfluoroalkyl substances (PFAS) are refractory anthropogenic chemicals current treatment processes at municipal water resource recovery facilities (WRRFs) cannot efficiently degrade them, hence, these cycle through the environment. Certain PFAS can be concentrated in biosolids from WRRFs commonly land applied for beneficial reuse. Given recent advances measurement of PFAS, documentation range concentrations pre‐stabilized sludge stabilized is critical to evaluating best...
Abstract Pyrolysis has been identified as a possible thermal treatment process for reducing perfluoroalkyl and polyfluoroalkyl substances (PFAS) from wastewater solids, though off‐gas the pyrolysis unit can still be source of PFAS emissions. In this work, fate through laboratory‐scale coupled with oxidizer off‐gasses is documented. Between 91.5% >99.9% reduction was observed entire system specific compounds based on targeted analyses. Overall, removed 99.4% moles introduced. Furthermore,...
Solids from wastewater treatment undergo processing to reduce mass, minimize pathogens, and condition the products for specific end uses. However, costs contaminant concerns (e.g., per- polyfluoroalkyl substances [PFAS]) challenge traditional landfill land application practices. Incineration can overcome these issues but has become complicated due evolving emissions regulations, it suffers poor public perception. These circumstances are driving re-emergence of pyrolysis gasification...