A5079075643- Toxic Organic Pollutants Impact
- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Effects and risks of endocrine disrupting chemicals
- Microbial bioremediation and biosurfactants
- Vehicle emissions and performance
- Per- and polyfluoroalkyl substances research
- Environmental Toxicology and Ecotoxicology
- Atmospheric Ozone and Climate
- Air Quality Monitoring and Forecasting
- Environmental Chemistry and Analysis
- Pesticide and Herbicide Environmental Studies
- Analytical Chemistry and Chromatography
- Carcinogens and Genotoxicity Assessment
- Atmospheric and Environmental Gas Dynamics
- Advanced Chemical Sensor Technologies
- Pharmaceutical and Antibiotic Environmental Impacts
- Analytical chemistry methods development
- Energy and Environment Impacts
- Odor and Emission Control Technologies
- Thermochemical Biomass Conversion Processes
- Mass Spectrometry Techniques and Applications
- Indoor Air Quality and Microbial Exposure
- Heavy metals in environment
- Free Radicals and Antioxidants
Oregon State University
2015-2024
Society of Environmental Toxicology and Chemistry
2017
Corvallis Environmental Center
2016
San Diego State University
2013
United States Geological Survey
2006-2010
Environmental Protection Agency
2006-2010
University of Liverpool
2007-2010
University of Otago
2010
Pacific Northwest Research Station
2010
Denver Federal Center
2010
The global distribution of 22 potentially harmful organochlorine compounds was investigated in more than 200 tree bark samples from 90 sites worldwide. High concentrations organochlorines were found not only some developing countries but also industrialized countries, which continue to be highly contaminated even though the use many these is restricted. relatively volatile (such as hexachlorobenzene) dependent on latitude and demonstrates distillation effect, whereas less endosulfan) are...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrganic Pollutant Accumulation in VegetationStaci L. Simonich and Ronald A. HitesCite this: Environ. Sci. Technol. 1995, 29, 12, 2905–2914Publication Date (Print):December 1, 1995Publication History Published online1 May 2002Published inissue 1 December 1995https://pubs.acs.org/doi/10.1021/es00012a004https://doi.org/10.1021/es00012a004research-articleACS PublicationsRequest reuse permissionsArticle Views2175Altmetric-Citations496LEARN ABOUT THESE...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVegetation-Atmosphere Partitioning of Polycyclic Aromatic HydrocarbonsStaci L. Simonich and Ronald A. HitesCite this: Environ. Sci. Technol. 1994, 28, 5, 939–943Publication Date (Print):May 1, 1994Publication History Published online1 May 2002Published inissue 1 1994https://pubs.acs.org/doi/10.1021/es00054a028https://doi.org/10.1021/es00054a028research-articleACS PublicationsRequest reuse permissionsArticle Views1105Altmetric-Citations311LEARN...
Polycyclic aromatic hydrocarbons (PAHs) on virgin polystyrene (PS) and PS marine debris led us to examine as a source sink for PAHs in the environment. At two locations San Diego Bay, we measured sorption of pellets, sampling at 0, 1, 3, 6, 9, 12 months. We detected 25 using new analytical method with comprehensive two-dimensional gas chromatography coupled time-of-flight mass spectrometry. Several congeners were samples before deployment. After deployment, some concentrations decreased...
Atmospheric particulate matter with diameter <2.5 um (PM2.5) was collected at Peking University (PKU) in Beijing, China before, during, and after the 2008 Olympics analyzed for black carbon (BC), organic (OC), lower molecular weight (MW < 300) MW302 Polycyclic Aromatic Hydrocarbons (PAHs), nitrated PAHs (NPAHs) oxygenated (OPAHs). In addition, direct indirect acting mutagenicity of PM2.5 potential DNA damage to human lung cells were also measured. Significant reductions BC (45%), OC (31%),...
Significance Polycyclic aromatic hydrocarbons (PAHs) adversely impact human health and ecosystems are known to persist in the atmosphere. Despite decades of research, mechanisms by which these PAHs not well understood. Here, we combine theory laboratory field measurements within a global climate model produce new insights into that responsible for observed persistence PAHs. We show temperature- humidity-dependent variations effective viscosity organic aerosol (OA) shield from chemical...
The concentrations and removals of 16 fragrance materials (EMs) were measured in 17 U.S. European wastewater treatment plants between 1997 2000 compared to predicted values. average FM profile influent similar. primary effluent was similar the profile; however, concentration FMs reduced by 14.6-50.6% effluent. final significantly different from a function design plant. In general, removal sorptive, nonbiodegradable correlated with total suspended solids plant, while nonsorptive,...
Residential wood combustion is one of the important sources air pollution in developing countries. Among pollutants emitted, parent polycyclic aromatic hydrocarbons (pPAHs) and their derivatives, including nitrated oxygenated PAHs (nPAHs oPAHs), are concern because mutagenic carcinogenic effects. In order to evaluate impacts on regional quality human health, emission inventories, based realistic factors (EFs), needed. this study, EFs 28 pPAHs (EFPAH28), 9 nPAHs (EFPAHn9), 4 oPAHs (EFPAHo4)...
Size fractionated particulate matter (PM) samples (including PM2.5 and PM10) were collected at Peking University in Northwestern Beijing, China for a 2 week period prior to the Olympics, during of 4 following 2008 both source control nonsource periods. PM10 concentrations this study high correlated with, but factor 1.3 times higher than, Beijing Environmental Protection Bureau's near-by sites because differences measurement methods used. The mean statistically different, lower by 31 35%,...
The 2008 Beijing Olympic Games provided a unique case study to investigate the effect of source control measures on reduction in air pollution, and associated inhalation cancer risk, Chinese megacity.We measured 17 carcinogenic polycyclic aromatic hydrocarbons (PAHs) estimated lifetime excess risk during different periods Games, assess effectiveness reducing PAH-induced risks.PAH concentrations were samples particulate matter ≤ 2.5 μm aerodynamic diameter (PM2.5) collected risks using...
Atmospheric particulate matter samples were collected from May 2010 to April 2011 in a rural e-waste area and Guangzhou, South China, estimate the lifetime inhalation cancer risk exposure parent polycyclic aromatic hydrocarbons (PAHs), high molecular weight PAHs (MW 302 PAHs), halogenated (HPAHs). Seasonal variations PAH concentrations profiles within between urban areas indicated different sources two areas. Benzo[b]fluoranthene, benzo[a]pyrene, dibenz[ah]anthracene, dibenzo[al]pyrene made...
Biomass pellets are emerging as a cleaner alternative to traditional biomass fuels. The potential benefits of using include improving energy utilization efficiency and reducing emissions air pollutants. To assess the environmental, climate, health significance replacing fuels with pellets, it is critical measure emission factors (EFs) various pollutants from pellet burning. However, only few field measurements have been conducted on carbon monoxide (CO), particulate matter (PM), polycyclic...
The formation of more polar and toxic polycyclic aromatic hydrocarbon (PAH) transformation products is one the concerns associated with bioremediation PAH-contaminated soils. Soil contaminated coal tar (prebioremediation) from a former manufactured gas plant (MGP) site was treated in laboratory scale bioreactor (postbioremediation) extracted using pressurized liquid extraction. soil extracts were fractionated, based on polarity, analyzed for 88 PAHs (unsubstituted, oxygenated, nitrated,...
The heterogeneous reactions of ambient particulate matter (PM)-bound polycyclic aromatic hydrocarbons (PAHs) and nitro-PAHs (NPAHs) with NO3/N2O5, OH radicals, O3 were studied in a laboratory photochemical chamber. Ambient PM2.5 PM10 samples collected from Beijing, China, Riverside, California, exposed under simulated atmospheric long-range transport conditions for NO3 radicals. Changes the masses 23 PAHs 20 NPAHs, as well direct indirect-acting mutagenicity PM (determined using Salmonella...
An analytical method was developed and used to measure trace levels of fragrance materials (FMs) in municipal wastewater treated wastewater. Sixteen FMs were selected as analytes because their wide range physical chemical properties. The included the use nine perdeuterated internal standards, a high-flow C18 speed disk for extraction from aqueous matrices, an accelerated solvent system solid matrices. For average FM recoveries (relative standard) 97−115%, with limits quantitation ranging 0.5...
The United States (U.S.) National Park Service has initiated research on the atmospheric deposition and fate of semi-volatile organic compounds in its alpine, sub-Arctic, Arctic ecosystems Western U.S. Results for analysis pesticides seasonal snowpack samples collected spring 2003 from seven national parks are presented herein. From a target analyte list 47 degradation products, most frequently detected current-use were dacthal, chlorpyrifos, endosulfan, γ-hexachlorocyclohexane, whereas...
A potential receptor influence function (PRIF) model, based on air mass forward trajectory calculations, was applied to simulate the atmospheric transport and outflow of polycyclic aromatic hydrocarbons (PAHs) emitted from China. With a 10 day time, most neighboring countries regions, as well remote were influenced by PAH emissions Of total annual emission 114 Gg, 92.7% remained within boundary mainland The geographic distribution PRIFs China similar source with high values in North Plain,...