A5022637547- Water Treatment and Disinfection
- Pharmaceutical and Antibiotic Environmental Impacts
- Groundwater flow and contamination studies
- Toxic Organic Pollutants Impact
- Chemical Analysis and Environmental Impact
- Microbial bioremediation and biosurfactants
- Groundwater and Isotope Geochemistry
- Environmental remediation with nanomaterials
- Weed Control and Herbicide Applications
- Soil and Water Nutrient Dynamics
- Pesticide and Herbicide Environmental Studies
- Vehicle emissions and performance
- Water Quality Monitoring Technologies
- Arsenic contamination and mitigation
- Advanced Chemical Sensor Technologies
- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Landfill Environmental Impact Studies
- Air Quality and Health Impacts
- Petroleum Processing and Analysis
- Environmental Chemistry and Analysis
- Heavy metals in environment
- Smart Materials for Construction
- Coastal wetland ecosystem dynamics
- Urban Stormwater Management Solutions
Environment and Climate Change Canada
2005-2023
Royal Holloway University of London
2019
University of Guelph
1996-2013
University of Alberta
2013
University of Florida
2012
National Water Research Institute
2002-2011
Wilfrid Laurier University
2011
Lake Tahoe Community College
2007-2009
Abstract Previous studies suggest that the expected global warming from greenhouse effect could raise sea level 50 to 200 cm (2 7 ft) in next century. This article presents first nationwide assessment of primary impacts such a rise on United States: (1) cost protecting ocean resort communities by pumping sand onto beaches and gradually raising barrier islands place; (2) developed areas along sheltered waters through use levees (dikes) bulkheads; (3) loss coastal wetlands undeveloped...
Many types of contaminants emerging concern (CECs), including per- and poly-fluoroalkyl substances (PFAS), have been found in leachate operating municipal landfills. However, there is only limited information on CECs presence historic landfills (≥3 decades since closure, often lacking engineered liners or collection systems) at concentrations that may pose a risk to nearby wells surface water ecosystems. In this study, 48 samples leachate-impacted groundwater were collected from 20 Ontario,...
Surface roughness aids to ameliorate wind erosion by extracting a portion of the wind's momentum thereby reducing quantity stress on surface. This paper evaluates effect different spatial arrangements surface partition average drag forces and distribution at A new tiered force balance was used in tunnel independently simultaneously measure arrays elements intervening In addition, Irwin sensors recorded point measurements shear within arrays. Roughness consisted small cylinders four...
The objective of this study was to investigate the occurrence glyphosate residues (glyphosate and its metabolite AMPA) in shallow groundwater a catchment dominated by agriculture, examine potential for store transmit these compounds surface waters.Glyphosate were found some samples collected riparian (surface seeps), upland (mostly <20 m below ground) wetland settings (<3 ground). Overall, AMPA detected 10.5 5.0%, respectively, analyzed as part study. All concentrations well Canadian...
Artificial sweeteners have been widely incorporated in human food products for aid weight loss regimes, dental health protection and dietary control of diabetes. Some these used compounds can pass non-degraded through wastewater treatment systems are subsequently discharged to groundwater surface waters. Measurements artificial rivers drinking water production scarce. In order determine the riverine concentrations their usefulness as a tracer at scale an entire watershed, we analyzed samples...
The objective of this study was to advance analytical methods for detecting oil sands process-affected water (OSPW) seepage from mining containments and discriminating any such the natural bitumen background in groundwaters influenced by Alberta McMurray formation. Improved sampling quantitative analyses two groups monoaromatic acids were employed analyze OSPW bitumen-affected source discrimination. Both showed significant enrichment OSPW, while ratios O2/O4 containing heteroatomic ion...
Four artificial sweeteners, acesulfame, sucralose, cyclamate, and saccharin were detected in a large septic plume at Long Point, Ontario, Canada. The pattern of sweetener detections the groundwater indicated that they derived from waste water seepage system site. Acesulfame was pervasive plume, whereas other three sweeteners have been attenuated, probably by microbial degradation.
Reductive dechlorination is the most common reaction in remediation of groundwater and soils contaminated with chlorinated compounds. The that occurs anaerobic bacteria can also be catalyzed by vitamin B12 titanium citrate. without release ethene intermediates from chloroalkylcobalamin complexes proposed as an alternate pathway for reductive ethenes. revised scheme supported (a) identification several direct liquid injection mixtures into electrospray mass spectrometer, (b) simultaneous...
Abstract A 5‐year‐old wood particle reactor treating agricultural tile drainage in southern Ontario was monitored for its ongoing ability to treat both nitrate (NO 3 – ) and perchlorate (ClO 4 ). Prior sampling undertaken the fifth year of operation, a highway safety flare containing ClO immersed inlet pipe elevating influent concentrations up 33.7 μg/L. removal rates were inhibited presence more than 1 2 mg/L NO ‐N, but increased rapidly about 60 μg/L/d upon depletion. Nitrate rates,...
[1] In this study, a Boolean classification was applied using novel methods to 3-D vegetation structural and topographic attributes found within flux footprint source/sink areas measured by eddy covariance instrumentation. The purpose determine if the spatial frequency of attributes, such as canopy height, effective leaf area index, etc., 1 km resolution Moderate Resolution Imaging Spectroradiometer (MODIS) pixels were significantly different from or similar sampled footprints originating...
The artificial sweetener acesulfame (ACE) is a potentially useful tracer of waste water contamination in groundwater. In this study, ACE concentrations were measured and impacted groundwater at 12 septic system sites Ontario, Canada. All samples tank effluent (n = 37) had >6 µg/L, all from the proximal plume zones 93) >1 µg/L and, almost distal >2 µg/L. Mean mass ratios total inorganic nitrogen/ACE ranged 680 to 3500 for samples. At five sites, decreasing ratio values indicated nitrogen...
Artificial sweeteners are ubiquitous constituents of sanitary wastewater and not completely attenuated by treatment processes. Consequently, artificial increasingly employed as a tool to detect help evaluate its impact on aquatic environments. In rural areas, septic systems known point sources groundwater, however the potential contribution streams via this pathway is unknown. We analyzed 294 samples from 173 stream sites in Southern Ontario, Canada, for acesulfame, saccharin, cyclamate,...
Abstract Detailed distribution of nitrate (NO 3 ) adjacent to a permeable reactive layer comprising coarse wood particles with high hydraulic conductivity ( K ∼ 1 cm/s) showed that ground water converged into the layer, allowing treatment aquifer zones located up 1.1 m below bottom layer. NO ‐N 6 99 mg/L was highly attenuated (generally <0.1 mg/L) within first third 4‐m‐wide Hydraulic retention time estimates based on borehole dilution velocity values indicated reaction rate approximately...
The clarity of water in Lake Tahoe has declined substantially over the past 40 yr. Causes degradation include nitrogen and phosphorous fertilization lake waters increasing amounts inorganic fine sediment that can scatter light. Atmospheric deposition is a major source sediment. A year-round monitoring study road dust emissions around was completed 2007 using Testing Re-entrained Aerosol Kinetic Emissions from Roads (TRAKER) system developed at Desert Research Institute (DRI). Results this...