A5005529201- Per- and polyfluoroalkyl substances research
- Advanced Photocatalysis Techniques
- Fuel Cells and Related Materials
- Toxic Organic Pollutants Impact
- TiO2 Photocatalysis and Solar Cells
- Electrocatalysts for Energy Conversion
- Atmospheric chemistry and aerosols
- Adsorption and biosorption for pollutant removal
- Atmospheric Ozone and Climate
- Advanced oxidation water treatment
- Advanced Nanomaterials in Catalysis
- Electrochemical Analysis and Applications
- Wastewater Treatment and Reuse
- Carbon Dioxide Capture Technologies
- Microbial bioremediation and biosurfactants
- Gas Sensing Nanomaterials and Sensors
- Catalytic Processes in Materials Science
- Nanoparticles: synthesis and applications
- Effects and risks of endocrine disrupting chemicals
- Air Quality and Health Impacts
- Membrane Separation Technologies
- Carbon and Quantum Dots Applications
- Luminescence and Fluorescent Materials
- Recycling and Waste Management Techniques
- Chemical Analysis and Environmental Impact
GSI Environmental (United States)
2022-2025
Leiden University
2022
Society for Chemical Engineering and Biotechnology
2021
Systems Engineering Research Center
2018-2020
Rice University
2017-2020
Using a bipolymer system consisting of polyvinylpyrrolidone (PVP) and poly(vinylidene fluoride) (PVDF), P25-TiO2 was immobilized into thin film mats porous electrospun fibers. Pores were introduced by dissolving sacrificial PVP to increase surface area enhance access TiO2. The highest photocatalytic activity achieved using PVDF:PVP weight ratio 2:1. Methylene blue (MB) used visualize contaminant removal, assess the sorption capacity (5.93 ± 0.23 mg/g) demonstrate stable removal kinetics (...
There is a growing need to mitigate the discharge of extracellular antibiotic resistance genes (ARGs) from municipal wastewater treatment systems. Here, molecularly-imprinted graphitic carbon nitride (MIP-C3N4) nanosheets were synthesized for selective photocatalytic degradation plasmid-encoded ARG (blaNDM-1, coding multidrug New Delhi metallo-β-lactamase-1) in secondary effluent. Molecular imprinting with guanine enhanced adsorption, which improved utilization photogenerated oxidizing...
Micrometer-sized titanium dioxide hierarchical spheres (TiO2-HS) were assembled from nanosheets to address two common limitations of photocatalytic water treatment: (1) inefficiency associated with scavenging oxidation capacity by nontarget constituents and (2) energy-intensive separation recovery the photocatalyst slurry. These micrometer-sized are amenable low-energy separation, over 99% recaptured both batch continuous flow reactors using microfiltration. Using as building blocks resulted...
Perfluorooctanoic acid (PFOA) is a widely distributed recalcitrant contaminant. In recent years, advanced oxidation processes have been explored for PFOA degradation, yet factors influencing their efficacy and degradation mechanism are not fully understood. Here, we resolve ambiguity in the literature regarding role of superoxide (e.g., by nucleophilic attack) considering three pure superoxide-producing systems: KO2 dimethyl sulfoxide, xanthine oxidase with hypoxanthine, WOx/ZrO2 catalyst...
Abstract Remediation of per‐ and polyfluoroalkyl substances (PFAS) in groundwater is particularly challenging because their unique chemical fate transport properties. Many conventional in‐situ remediation technologies, commonly applied to address other contaminants, have proven ineffective for treatment PFAS. Given stability, destruction PFAS has remained elusive as an option. Consequently, new approaches manage plumes are great interest environmental practitioners. We propose that enhancing...
ABSTRACT This study presents a planning‐level graphical tool and regression equation model for estimating the longevity of Colloidal Activated Carbon (CAC) barriers treating per‐ polyfluoroalkyl substances (PFAS) in groundwater. The development incorporated information from field‐scale CAC barriers, including design data 17 sites performance monitoring results total 26 sites. consists both mathematical frameworks barrier based on site‐specific parameters, dimensions, groundwater Darcy...
Potential spikes during the start-up and shutdown of fuel cells are a major cause platinum electrocatalyst degradation, which limits lifetime device. The electrochemical oxidation (Pt) that occurs on cathode potential plays key role in this degradation process. However, composition oxide species formed as well their catalyst dissolution remains unclear. In study, we employ special arrangement XPS (X-ray photoelectron spectroscopy), is covered by graphene spectroscopy window, making situ...
Relatively fast and cost-effective production of porous carbon particles via a soft-template acid base route. Impressive enhancement in Pt corrosion stability due to optimal confinement mesoporous cavities carbons.
Abstract Current ex situ per‐ and polyfluoroalkyl substances (PFAS) remediation strategies often involve the treatment of large volumes PFAS‐impacted water via separation processes to concentrate PFAS for subsequent or disposal. This study presents a new method concentrating that relies on colloidal gas aphrons (CGAs), unusual microstructures composed water, multilayers surfactants, air, can be used electrostatic hydrophobic sorption. successfully demonstrates efficacy CGAs in removing ionic...
Using a bi-polymer system comprising of transparent poly(methyl methacrylate) (PMMA) and poly(vinyl pyrrolidone) (PVP), visible light active Ag3PO4/P25 composite was immobilized into the mats polymeric electrospun nanofibers. After nanofibers synthesis, sacrificial PVP removed, leaving behind rough surface with easy access to composite. The remarkable photocatalytic efficiency attained using PMMA weight ratio 1:0.6. Methyl orange (MO) used visualize pollutant removal exhibited stable...
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ABSTRACT This article addresses the urgent need for cost‐effective and sustainable methods to mitigate per‐ polyfluoroalkyl substances (PFAS) contamination in surface water stormwater. Although majority of PFAS research development date has focused on groundwater soil treatment technologies, some cases there may be a greater risk posed by high mobility potential direct contact with Based evolving regulatory landscape elevated concentrations observed available stormwater data near fire...