A5054867286- Marine and coastal ecosystems
- Atmospheric chemistry and aerosols
- Aquatic Ecosystems and Phytoplankton Dynamics
- Per- and polyfluoroalkyl substances research
- Water Treatment and Disinfection
- Toxic Organic Pollutants Impact
- Constructed Wetlands for Wastewater Treatment
- Urban Stormwater Management Solutions
- Wastewater Treatment and Reuse
- Advanced oxidation water treatment
- Microbial Community Ecology and Physiology
- Environmental Chemistry and Analysis
- Fecal contamination and water quality
- Pharmaceutical and Antibiotic Environmental Impacts
- Reproductive Health and Contraception
- Neuroscience, Education and Cognitive Function
- Attention Deficit Hyperactivity Disorder
- Advanced Photocatalysis Techniques
- Membrane-based Ion Separation Techniques
- demographic modeling and climate adaptation
- Oil Spill Detection and Mitigation
- Flow Measurement and Analysis
- Marine Toxins and Detection Methods
- Air Quality Monitoring and Forecasting
- SARS-CoV-2 detection and testing
McGill University
2020-2025
University of Sussex
2024-2025
Stantec (United States)
2024-2025
University of Virginia's College at Wise
2024
California Institute of Technology
2024
Clinton Health Access Initiative
2023
Southern Nevada Water Authority
2016-2020
Quality Research
2018-2020
Polytechnique Montréal
2019
Monash University
2017
The photochemical formation of hydroxyl radical (HO(•)) from effluent organic matter (EfOM) depends upon the chemical properties this heterogeneous mixture. In study, two EfOM samples collected wastewater treatment plants (WWTP A and B) were fractionated by both hydrophobicity (bulk non-humic) apparent molecular weight (AMW). quantum yield for HO(•) (ΦHO(•)) maximum fluorescence (ΦF) subsequently measured each subfraction. rates (considering only hydrogen-peroxide-independent pathways) bulk...
The excitation of dissolved organic matter (DOM) from sunlight produces a range reactive intermediates, including triplet-excited state (3DOM*), hydroxyl radical (HO•), and singlet oxygen (1O2). These intermediates are important for the inactivation pathogens degradation trace contaminants (OC) within natural engineered systems. However, halides found in background matrix can alter photoproduction rates by promoting or quenching formation these intermediates. Apparent quantum yields (Φa)...
A comparison of loadings N-nitrosamines and their precursors from different source water categories is needed to design effective blending strategies. Previous research using Formation Potential (FP) chloramination protocols (high dose prolonged contact times) raised concerns about precursor various categories, but differences in the employed rendered comparisons difficult. In this study, we applied Uniform Condition (UFC) ozonation mimicking typical disinfection practice compare ambient...
The potential for cyanobacterial blooms to impact recreational and drinking water source quality is a growing concern. Numerous monitoring tools have been developed that can alert stakeholders the onset of initiate mitigation efforts waters used recreation or supply. Early warning systems need consider multiple aspects bloom: whether bloom occurring in water, it might be transported intakes, toxin taste odor compound producers are present what proportion cells they comprise, entering utility...
This theoretical paper presents the development and analysis of an inclusive educational framework designed to manage cognitive load for neurodivergent students in online learning environments. Drawing from theory neurodiversity studies, is based on existing literature, empirical work conducted by authors, iterative feedback a participatory research advisory board. Taking neurodiversity-informed perspective that focuses interventions addressing challenges common across range conditions, it...
Perfluoroalkyl and polyfluoroalkyl substances (PFASs) are a group of persistent contaminants that have been identified throughout the aquatic environment. In this study, ten targeted perfluoroalkyl acids (PFAAs), three PFAA precursors, non-targeted precursors were monitored in four full- pilot-scale potable reuse plants at each stage advanced treatment. Non-targeted quantified by applying total oxidizable precursor assay which oxidized hydroxyl radicals to PFAAs. Two systems had...
This study measured chlorine- and chloramine-reactive precursors using formation potential (FP) tests of nine U.S. Environmental Protection Agency (EPA) regulated 57 unregulated disinfection byproducts (DBPs) in tertiary-filtered wastewater before after pilot-scale granular activated carbon (GAC) adsorption. Using breakthrough precursor concentration associated calculated cytotoxicity genotoxicity (by correlating known lethal concentrations reported elsewhere), the performance three parallel...
Algicides, like hydrogen peroxide and copper sulfate, are commonly applied to recreational waters drinking water sources mitigate cyanobacterial blooms. In this work, the effects of sulfate were evaluated in two natural bloom samples (collected from Canadian American waterbodies) one lab-cultured Microcystis aeruginosa suspended Colorado River water. Five algicide dissolved organic carbon (DOC) dose ratios during an initial exposure period 24 h. One ratio (0.4 H2O2:DOC or 0.25 CuSO4:DOC) was...
ABSTRACT There is interest in treatment processes that can both contribute to pathogen removal and provide effective pretreatment for reverse osmosis (RO) potable reuse systems. The most familiar train employs micro-/ultrafiltration along with cartridge filters (CFs) upstream of RO. However, there are some applications which other pre-RO processes, such as membrane bioreactors (MBRs), desirable. In cases, more research needed on MBR an RO process. addition, although CFs widely used, the...
As potable reuse guidelines and regulations continue to develop, the presence of N-nitrosamines is a primary concern because their associated health concerns. In this study, bench-, pilot-, full-scale tests were conducted focus on occurrence treatment N-nitrosomorpholine (NMOR) in United States (U.S.) systems. Out twelve U.S. wastewater effluents collected, ambient NMOR was detected eleven (average = 20 ± 18 ng/L); contrast, only two thirteen surface water stormwater samples had NMOR. Across...
Oxidation processes can provide an effective barrier to eliminate cyanotoxins by damaging cyanobacteria cell membranes, releasing intracellular cyanotoxins, and subsequently oxidizing these toxins (now in extracellular form) based on published reaction kinetics. In this work, cells from two natural blooms (from the United States Canada) a laboratory-cultured Microcystis aeruginosa strain were treated with chlorine, monochloramine, chlorine dioxide, ozone, potassium permanganate. The release...
Per- and polyfluoroalkyl substances (PFAS) are a large chemical family, numerous species can co-exist in environmental samples, especially those impacted by aqueous film-forming foams (AFFFs). Given the limited availability of standards, capturing total amount PFAS is challenging. Thus, oxidizable precursor (TOP) assay has been developed to estimate via oxidative conversion precursors into perfluorocarboxylic acids (PFCAs). This study aims enhance robustness TOP replacing heat activation...
Abstract The occurrence of toxic cyanobacteria in surface waters and their impact on drinking water treatment plants (WTPs) is a growing, global concern. main objective this paper was to assess the presence sources associated cell removal efficiency full-scale WTPs across world. Previously unpublished data collected from experiencing cyanobacterial blooms either managed or recreational waters. In total, were 31 21 North South America, Europe, Asia, Australia. most commonly detected species...
As Climate Change Haven Communities are constructed across the Northern Hemisphere, it will be necessary to attract two types of migrants populate them. The first group consists professionals and companies in eco-sustainable businesses, such as law firms, insurance companies, investment banking, technological innovation, mass media, medical research pharmaceutical research. second consist persons engaged organic/eco-sustainable agriculture whose crops animal husbandry practices can...