A5025229494- Toxic Organic Pollutants Impact
- Air Quality and Health Impacts
- Atmospheric chemistry and aerosols
- Atmospheric and Environmental Gas Dynamics
- Effects and risks of endocrine disrupting chemicals
- Oil Spill Detection and Mitigation
- Microbial bioremediation and biosurfactants
- Heavy metals in environment
- Carcinogens and Genotoxicity Assessment
- Per- and polyfluoroalkyl substances research
- Fire effects on ecosystems
- Radioactive element chemistry and processing
- Radioactive contamination and transfer
- Indoor Air Quality and Microbial Exposure
- Environmental Impact and Sustainability
- Pesticide Residue Analysis and Safety
- Skin Protection and Aging
- Chromium effects and bioremediation
- Petroleum Processing and Analysis
- Heavy Metal Exposure and Toxicity
- Vehicle emissions and performance
- Pesticide and Herbicide Environmental Studies
- Microplastics and Plastic Pollution
Southwest University
2024-2025
Environment and Climate Change Canada
1998-2021
Umeå University
1998
University of Toronto
1998
Youngstown State University
1998
Tennessee Valley Authority
1998
Inductively coupled plasma mass spectrometry (ICP-MS) was used to detect heavy metals in 74 typical and representative commercial organic fertilizers (COFs) collected major COF production areas China. The potential risk of fertilization into soils evaluated. concentrations (mg kg− 1) these COFs were 1.55–36.95 (As), 0.04–2.32 (Hg), 1.43–78.05 (Pb), 0.15–7.49 (Cd), 11.03–212.90 (Cr), 7.74-555.11 (Cu), 21.46-2705.68 (Zn), 5.62-244.47 (Ni), respectively. Based on China's Organic Fertilizer...
Results are reported from a field calibration of the polyurethane foam (PUF) disk passive air sampler for measuring polycyclic aromatic compounds (PACs) in atmosphere Alberta oil sands region Canada. Passive samplers were co-deployed alongside conventional high volume at three sites. The results demonstrate ability PUF to capture PACs, including hydrocarbons (PAHs), alkylated PAHs and parent dibenzothiophenes. Both gas- particle-phase PACs captured with an average sampling rate approximately...
Results are reported from an ongoing passive air monitoring study for polycyclic aromatic compounds (PACs) in the Athabasca oil sands region Alberta, Canada. Polyurethane foam (PUF) disk samplers were deployed consecutive 2-month periods November 2010 to June 2012 at 17 sites. Samples analyzed hydrocarbons (PAHs), alkylated PAHs, dibenzothiophene and its derivatives (DBTs). Relative parent PAHs DBTs enriched bitumen therefore considered be petrogenic markers. Concentrations range 0.03-210...
The Global Atmospheric Passive Sampling (GAPS) network, initiated in 2005 across 55 global sites, supports the monitoring plan (GMP) of Stockholm Convention on Persistent Organic Pollutants (POPs) by providing information POP concentrations air a scale. These data inform assessments long-range transport potential POPs and effectiveness evaluation chemical regulation efforts, observing changes over time. Currently, measurements spanning 5–10 sampling years are available for 40 sites from GAPS...
The chiral pesticide heptachlor can undergo photolysis to yield the racemic products heptachlor-exo-epoxide (HEPX) and photoheptachlor. Heptachlor is also metabolized nonracemic HEPX in biological systems soils. ambient air samples from southern United States Lakes Ontario Superior was enriched (+) enantiomer. Average enantiomer ratios (ER = areas of (+)/(−) HEPX) these locations ranged 1.51 2.02, were similar ER values reported for agricultural Airborne racemic, with ERs 0.98−1.02. These...
Long-term air monitoring data for POPs are required to determine the effectiveness of source reduction measures and factors controlling concentrations. Air samples were collected between 1992 2012 at three sites with different geographical characteristics (Burnt Island, Egbert Point Petre) in Canadian Great Lakes Basin (GLB) using high-volume samplers analyzed organochlorine pesticides (OCPs) polychlorinated biphenyls (PCBs). Spatial temporal trends gas-phase concentrations OCPs, selected...
Extracts of passive air samples collected from 15 sampling network sites across the Athabasca Oil Sands region were used to explore application in vitro assays for mutagenicity (Salmonella mutation assays) and cytotoxicity (lactate dehydrogenase assay) assess toxicity mixture. The monitoring polycyclic aromatic compounds (PACs) PAC transformation products, including nitrated hydrocarbons (NPAHs) oxygenated (OPAHs) was then linked potential air. PACs during April May 2014 elevated near mining...
Results of a passive air monitoring study for polycyclic aromatic compounds (PACs) in the Athabasca oil sands region (AOSR) Alberta, Canada, are reported. Polyurethane foam disk samplers were deployed consecutive 2-month periods from November 2010 to January 2016 at 15 sites. Samples analyzed hydrocarbons (PAHs), alkylated PAHs (alkPAHs), and dibenzothiophene its derivatives (DBTs). Concentrations ranges 0.3–43, 0.15–460, 0.04–130 ng/m3 ∑PAHs, ∑alkPAHs, ∑DBTs, respectively. The increase...
A retrospective analysis of a comprehensive series high-volume air samples (n = 70) collected during 2010-2011 in Toronto (Canada) was performed. Seven UV compounds were analyzed by gas chromatography-tandem mass spectrometry (GC-MS/MS) with sum concentrations (gas + particle phase) ranging from 80 to 2030 pg/m3. Homosalate (HMS) the most prevalent organic UV-filter (47% total concentration), followed 2-ethylhexyl salicylate (EHS, ∼29%), E- and Z-2-ethylhexyl 4-methoxycinnamate (EHMC, ∼17%)....
Temporal and spatial trends of total air concentrations (gas + particle) halogenated flame retardants at the Canadian Great Lakes Basin were assessed (2005–2014).
Measurements of the outdoor air concentrations phthalates (PHTs) using passive sampling media (polyurethane foam (PUF) disks) were conducted at 8 different sites across Greater Toronto Area (GTA) during 2016–2017. Highest PHT levels obtained characterized by high urban and traffic activity. The profile was mainly dominated bis(2-ethylhexyl) phthalate (DEHP), whose median concentration examined MDEHP = 1200 pg/m3. It discovered that had a strong correlation with ambient temperature. Warmer...
Risk assessment of the pesticide dicofol is hampered by lack information about its levels, which largely attributed to instability during instrumental analysis. In this study, was assessed in air through a novel approach tracking ratio two isomers (p,p′ and o,p′) stable degradation product dichlorobenzophenone (DCBP), while considering other potential precursors. Twenty-three samples were collected using polyurethane foam (PUF) disk passive samplers deployed across agricultural, urban, rural...
A Canadian ban on lindane for agricultural use came into effect December 31, 2004. In the years leading up to this ban, air concentrations of γ–HCH, active ingredient lindane, decreased gradually over Great Lakes region. Typical mean were about 5 and 10 pg m-3 Huron Ontario, respectively, during summer 2005. However, period June 27–28, 2005, a γ–HCH pollution episode was captured in Toronto by three independent sampling programs [Episodic Pesticide Transport (EPT) Study, Integrated...
<title>Abstract</title> Inductively coupled plasma mass spectrometry (ICP-MS) was used to detect heavy metals in 74 typical and representative commercial organic fertilizers (COFs) collected major COF production areas China. The potential risk of fertilization into soils evaluated. concentrations (mg kg<sup>− 1</sup>) these COFs were 1.55–36.95 (As), 0.04–2.32 (Hg), 1.43–78.05 (Pb), 0.15–7.49 (Cd), 11.03–212.90 (Cr), 7.74-555.11 (Cu), 21.46-2705.68 (Zn), 5.62-244.47 (Ni), respectively. Based...