A5004308315- Toxic Organic Pollutants Impact
- Per- and polyfluoroalkyl substances research
- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Air Quality Monitoring and Forecasting
- Optimization and Search Problems
- Environmental Toxicology and Ecotoxicology
- Vehicle emissions and performance
- Quantum Electrodynamics and Casimir Effect
- Groundwater flow and contamination studies
- Petroleum Processing and Analysis
- Hydrocarbon exploration and reservoir analysis
- Remote Sensing and Land Use
- Effects and risks of endocrine disrupting chemicals
- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine and fisheries research
- Facility Location and Emergency Management
- Environmental Quality and Pollution
- Interconnection Networks and Systems
- Analytical Chemistry and Chromatography
- Oil Spill Detection and Mitigation
- Scheduling and Optimization Algorithms
- Complexity and Algorithms in Graphs
- Vehicle Routing Optimization Methods
University of Alberta
2013-2023
Jiangxi Agricultural University
2020
Nankai University
2013-2017
Yantai University
2007-2008
Perfluoroalkyl acids (PFAAs) are persistent and bioaccumulative compounds that have been associated with adverse health outcomes. In human blood, PFAAs exist as both linear branched isomers, yet for most homologues, all elimination rates unknown. Paired blood urine samples (n = 86) were collected from adults in China. They analyzed by a sensitive isomer-specific method permitted the detection of many first time. For except perfluoroundecanoate (PFUnA), levels correlated positively blood....
Biomagnification of perfluoroalkyl substances (PFASs) are well studied in marine food webs, but related information fresh water ecosystem and knowledge on fractionation their isomers along the web limited. The distribution, bioaccumulation, magnification, isomer PFASs were investigated a Taihu Lake, China. Perfluorooctanesulfonate (PFOS) perfluorocarboxylates (PFCAs) with longer carbon chain lengths, such as perfluorodecanoate (PFDA) perfluoroundecanoate (PFUnA), predominant organisms, while...
Abstract Exposure of polar bears ( Ursus maritimus ) to persistent organic pollutants was discovered in the 1970s, but recent evidence suggests presence unknown toxic chemicals their blood. Protein and phospholipid depleted serum stirred with polyethersulfone capillaries extract a broad range analytes, nontarget mass spectrometry “fragmentation flagging” used for detection. Hundreds analytes were belonging 13 classes, including novel polychlorinated biphenyl (PCB) metabolites many...
Despite that China is the largest global manufacturer of perfluoroalkyl substances (PFASs), manufacturing methods and isomer purity these chemicals are generally unknown. Here, sampling was conducted around a major fluorochemical park in 2012, including soil water collection inside park, from wastewater treatment plant (WWTP), as well surrounding rivers (∼15 km radius). Perfluoroalkyl sulfonates (PFSAs) were lower than carboxylates (PFCAs) all samples, short-chain (C4–C6) PFCAs predominant....
Oil sands mining has been linked to increasing atmospheric deposition of polycyclic aromatic hydrocarbons (PAHs) in the Athabasca oil region (AOSR), but known sources cannot explain quantity PAHs environmental samples. were measured living Sphagnum moss (24 sites, n = 68), sectioned peat cores (4 161), and snow (7 19) from ombrotrophic bogs AOSR. Prospective source samples also analyzed, including petroleum coke (petcoke, both delayed fluid coking), fine tailings, ore, naturally exposed...
The bioaccumulation of perfluoroalkylated substances (PFASs) in plankton has previously been evaluated only freshwater and regional seas, but not for the large oligotrophic global oceans. Plankton samples from tropical subtropical Pacific, Atlantic Indian Oceans were collected during Malaspina 2010 circumnavigation expedition, analyzed 14 ionizable PFASs, including perfluorooctanoate (PFOA), perfluorooctanesulfonate (PFOS) their respective linear branched isomers. PFOA PFOS concentrations...
Perfluoroalkyl substances (PFAS) are ubiquitous in the environment, including remote polar regions. To evaluate role of snow deposition as an input PFAS to Maritime Antarctica, fresh deposition, surface snow, streams from melted coastal seawater, and plankton samples were collected over a three-month period (December 2014–February 2015) at Livingston Island. Local sources PFASs significant for perfluoroalkyl sulfonates (PFSAs) C7–14 carboxylates (PFCAs) but limited transited areas research...
This air synthesis review presents the current state of knowledge on sources, fates, and effects for polycyclic aromatic compounds (PACs) related chemicals released to in oil sands region (OSR) Alberta, Canada. Through implementation Joint Canada–Alberta Oil Sands Monitoring Program 2012 a vast amount new information PACs has been acquired through directed monitoring research projects reported scientific community public. addresses questions cumulative informs sustainable management resource...
The aromatic fractions of snow, lake sediment, and air samples collected during 2011-2014 in the Athabasca oil sands region were analyzed using two-dimensional gas chromatography following a nontargeted approach. Commonly monitored aromatics (parent alkylated-polycyclic hydrocarbons dibenzothiophenes) excluded from analysis, focusing mainly on other heterocyclic aromatics. unknowns detected classified into isomeric groups tentatively identified mass spectral libraries. Relative...
Hydraulic fracturing (HF) has emerged as a major recovery method of unconventional oil and gas reservoirs concerns have been raised regarding the environmental impact releases Flowback Produced Water (FPW) to aquatic ecosystems. To investigate potential effects HF-FPW on fish embryo development, samples were collected from two different wells organic fractions isolated both aqueous particle phases eliminate confounding high salinity. Each extract was characterized by non-target analysis with...
Perfluoroalkyl substances (PFASs) such as perfluorohexanesulfonate (PFHxS), perfluorooctanoate (PFOA), perfluorooctanesulfonate (PFOS) and PFOS–precursors are routinely measured in human plasma serum, but their relative abundance the blood cell fraction has not been carefully examined, particularly at isomer–specific level. Human whole were collected partitioning behaviors of PFASs isomers between cells investigated. In samples, mass (Fp) for increased among perfluoroalkyl carboxylates...
Perfluoroalkyl acids (PFAAs) are a group of chemicals used for many applications and widely present in the environment humans. In this study, serum levels PFAAs isomers perfluorooctanesulfonate (PFOS) perfluorooctanoate (PFOA) were analyzed 141 Chinese pregnant women. Among all samples, total PFOS (∑ PFOS, mean concentration 7.32 ng/mL) was predominant, followed by ∑ PFOA (mean 4.78 perfluorodecanoate (PFDA, 1.45 ng/mL). On average, proportion linear (n-PFOS) 66.7% which higher than general...
The effects of hydraulic fracturing (HF) flowback and produced water (HF-FPW), a complex saline mixture injected HF fluids deep formation that return to the surface, was examined in rainbow trout (Oncorhynchus mykiss). Exposure HF-FPWs resulted significant induction ethoxyresorufin-O-deethylase (EROD) activity both liver gill tissues. Increased lipid peroxidation via oxidative stress also detected by thiobarbituric acid reactive substances (TBARS) assay. mRNA expressions battery genes...
Abstract Air quality in Northern China has become a global hot spot issue due to series of air pollution events the recent years. In this study, five representative pollutants (PM 2.5 , SO 2 NO CO, and O 3 ) were employed reveal spatial temporal distribution China. Periodic decline PM from 2016 2018 indicated that control measures have achieved desired results. addition, PM2.5 was significantly positively correlated with ( p < 0.001), had negative correlations other four pollutants....
Hydraulic fracturing (HF) flowback and produced water (FPW) can be toxic to aquatic life but its chemical content is largely unknown, variable complex. Seven FPW samples were collected from a HF operation in the Duvernay Formation (Alberta, Canada) over 30 days of characterized by nontarget workflow based on high performance liquid chromatography - resolution mass spectrometry (HRMS). A modified Kendrick defect plot MS/MS spectral interpretation revealed seven series homologues composed...