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When airborne particles (green) form before PAHs adhere, both the pollutants and particles dissipate quickly, as shown in the top row. But when the particles form in the presence of pollutants, which is what likely happens in nature, the longer-lasting particles enable the long-range transport of the pollutants (bottom).
A team of researchers from the University of California, Berkeley; University of North Carolina, Chapel Hill; and University of Miami has analyzed the implications of California’s Clean Vehicle Rebate Project (CVRP) for emissions of greenhouse gases and criteria air pollutants, both in aggregate and in their distribution.
University of Kentucky Chemistry Professor Marcelo Guzman has received a three-year grant from the National Science Foundation (NSF) for research, education and outreach efforts in the field of environmental and atmospheric chemistry. Both types of emissions cause tiny particles to be suspended in air. —Prof. —Prof.
Now, a new study of children and young adults in Mexico City by a team of researchers at the Universities of Montana, Valle de México, Boise State, Universidad Veracruzana, Instituto Nacional de Pediatría and Paul-Flechsig-Institute for Brain Research has identified evolving axonal damage using a novel Non-P-Tau assay for cerebrospinal fluid (CSF).
A study by researchers from the National University of Singapore Department of Economics ( NUS Economics ) has found a correlation between pollution and productivity of employees. The study, the first of its kind to examine prolonged exposure to air pollution, was published in the American Economic Journal: Applied Economics.
Warm season average present-day daily maximum ozone levels (AVGMDA8) at urban (left) and non-urban sites (right). Source: University of Leicester. In some parts of Asia, Africa and South America, the researchers identified data gaps which prevented them from characterizing ozone pollution exposure patterns. Click to enlarge.
A study by three French institutes—Ifremer, the University of Bordeaux and the IRD (a public research institution)—has found that the surface water of the Atlantic Ocean is twice as polluted by cellulose fibers as it is by microplastics. Cellulose fibers are present in virtually all the samples collected (92.5%
Children living in polluted megacities are at increased risk for brain inflammation and neurodegenerative changes, including Alzheimer or Parkinson’s disease, according to a study led by University of Montana Professor Dr. Lilian Calderón-Garcidueñas and her colleagues. —Calderón-Garcidueñas et al.
Heavily polluted areas have a higher rate of angioplasty procedures to treat blocked arteries than areas with clean air, according to research to be presented at ESC Congress 2019 together with the World Congress of Cardiology. Procedures are even more common in winter, the most polluted time of year. additional PCIs per week.
Boxes represent pollution reading locations during that window. Computer scientists at the University of California, San Diego have built a portable pollution sensors that transmit transmit their air quality readings to smart phones, allowing users to monitor air quality in real time. Nikzad et al. Click to enlarge.
Both fine-particle air pollution and noise pollution may increase a person’s risk of developing cardiovascular disease, according to German researchers who have conducted a large population study, in which both factors were considered simultaneously. Philip Harber, University of Arizona, not involved in the research.
Since the 1980s, air pollution has increased worldwide, but it has increased at a much faster pace in regions close to the equator. The work provides strategic insight on where in the world to reduce emissions of pollutants that form ozone. Jason West, corresponding author. —Owen R. Cooper, co-author. Yuqiang Zhang, Owen R.
The green symbol and dashed arrow illustrate the large reductions in tailpipe VOC emission factors as precatalyst on-road gasoline vehicles were replaced by present-day vehicle fleets. Even so, lotions, paints and other products contribute about as much to air pollution as does the transportation sector. McDonald et al.
Researchers from Carnegie Mellon University and the University of Pittsburgh have found that the air pollution and greenhouse gas costs of shipping crude by rail are nearly twice as large as those for oil pipelines. Air pollution and greenhouse gas damages for transportation by railroad and pipelines to the gulf coast.
Solid CFDNPs in air pollution are characterized by the abundant presence of strongly magnetic, iron-rich particles which condense and/or oxidize upon airborne release, often retaining a rounded or spherical shape as they cool. Erythrocytes were identified transferring ‘hitchhiking’ NPs to activated endothelium. Cross, Imad A.M.
Cooking, cleaning and other routine household activities generate significant levels of volatile and particulate chemicals inside the average home, leading to indoor air quality levels on par with a polluted major city, according to a study by researchers at the University of Colorado Boulder. Earlier post.).
—Lin Zhang of Peking University, lead author. Many countries regulate ozone because of the damage the pollutant does to plants and people. Since the 1990s, tighter controls on emissions of those ingredients have lessened ozone pollution in many European and US cities. —Lin Zhang. Cooper, Martin G.
2015) formulated by the National Development and Reform Commission of China (NDRC), coal consumption will be limited to 3900 million metric tons (MMT) by 2015, which will present a challenge given the tremendous increase in coal use within the last 5 years (2300 MMT in 2006 and 3200 MMT in 2010). Click to enlarge.
The pilot, the first of its kind in Israel, will be carried out between Tel Aviv University Railway Station and Klatzkin Terminal in Ramat Aviv—a two-kilometer route including 600 meters of electric road. —Ron Huldai, Mayor of Tel Aviv-Yafo.
University of Delaware researchers have identified an algae— Heterosigma akashiwo —that grows rapidly on a gas mixture that has the same carbon dioxide and nitric oxide (NO) content as emissions released from a power plant. So far, they found a large increase in carbohydrates when grown on flue gas compared to air.
A new study led by researchers at the University of Michigan compared regulated and unregulated emissions from both light-duty passenger car (1.7 A new study led by researchers at the University of Michigan compared regulated and unregulated emissions from both light-duty passenger car (1.7 Credit: ACS, Chin et al. Click to enlarge.
Data presented as mean ± standard deviation, N=3. Their paper is published in the ACS journal Energy & Fuels. Regulated emissions for all test fuels over the cold-start and hot-start LA92 cycles. Yang et al.
Vattenfall and Aalborg University are partnering with Danish startup SCF Technologies in a two-year project to design a demonstration plant based on SCF’s CatLiq process—an application of the firm’s supercritical fluid technology in the catalytic production of bio-oil from organic waste. SCF Technologies presentation (2008).
A team led by researchers at Oregon State University has discovered novel nitrated polycyclic aromatic hydrocarbon (NPAH) compounds produced by combustion sources or formed in the atmosphere that are hundreds of times more mutagenic than their parent PAHs, which are known carcinogens. Staci Simonich.
Researchers at Isfahan University of Technology (Iran) report the efficient production of cellulosic ethanol from rice straw using a new sodium carbonate pretreatment method. Resources.
Researchers added the mass spectrometer to SwRI’s Universal Synthetic Gas Reactor (USGR), a catalyst performance testing solution that incorporates a Fourier Transform Infrared (FTIR) spectrometer, which uses IR radiation to identify and quantify molecules present in a gas sample. Real-time information is important,” Seuser said.
Air pollution impairs the function of blood vessels in the lungs, according to a study of more than 16,000 patients presented at EuroEcho-Imaging 2016. The study examined the effect of air pollution on pulmonary haemodynamics (blood flow) in a population and in individuals. Increases in PM 10 and PM 2.5
Marangoni Tire, the Italian tire specialist, presented its latest show car, the Marangoni Evoque HFI-R, at the Bologna Motor Show earlier this month.Evoque HFI-R. Click to enlarge. The Marangoni Evoque HFI-R, based on a Si4 2.0
Researchers at Peking University have developed a new methodology to model black carbon (BC) emissions from diesel and gasoline motor vehicles. There is also a potential of applying the quantitative approach developed in this study to other pollutants. Credit: ACS, Wang et al. Click to enlarge. —Wang et al. Click to enlarge.
The effect of near roadway air pollution on human health is especially significant in major cities, and respiratory and cardiovascular diseases are mostly implicated in response to continued/repeated exposure to air pollution. The paper appears in the ACS journal Environmental Science & Technology. —Pardo et al.
A study by researchers from the US, Mexico and Canada has found that children’s urban air pollution exposures result in systemic and brain inflammation and the early hallmarks of Alzheimer’s disease (AD). The study found that clinically healthy children who live in a polluted environment and who also carry a gene—the apolipoprotein ?4
A team from Universita degli Studi di Pisa (Italy) and Rolf Reitz at the University of Wisconsin-Madison are proposing a novel combustion concept—Homogenous Charge Progressive Combustion (HCPC)—based on a split-cycle principle to control HCCI combustion in diesel-fueled engines. Combustor Compressor. Displacement. Squish height.
A new study, part of the Atlanta Commuter Exposures (ACE) Study, has assessed on-roadway in-cabin particulate pollution (PM 2.5 ) collected from scripted rush hour commutes on highways and on non-highway side streets. Most traffic pollution sensors are placed on the ground alongside the road and take continuous samples for a 24-hour period.
Professional drivers working in congested cities are exposed to black carbon levels that are on average a third higher than would be experienced at a busy roadside, according to research presented at the European Respiratory Society International Congress. We know quite a lot about the dangers of exposure to traffic pollution.
A study by researchers from the University of Edinburgh and the National Institute for Public Health and the Environment in the Netherlands has found that nanoparticles, such as those found in air pollution, can travel into the blood and accumulate in diseased blood vessels.
Researchers from Sun-Yat Sen University in China report in an open-access paper in ACS ES&T Engineering the development of a catalyst that destroys medications and other compounds already present in wastewater to generate hydrogen fuel, getting rid of a contaminant while producing something useful. 1c00003.
When including Land Use Change (LUC) factors, Brazilian sugar cane ethanol and soybean biodiesel have much larger life-cycle emissions than conventional gasoline and biodiesel for six regulated, non-greenhouse gas (GHG) air pollutants, according to a study led by a team from the University of California, Merced. 683 g PM 2.5
A large-scale study has found that high levels of air pollution adversely effect ovarian reserve—a term widely adopted to reflect the number of resting follicles in the ovary and thus a marker of potential female fertility. This association was age-independent. and NO 2 concentrations.
Identical total annual emissions of sulfate and black carbon aerosol from eight major past, present, and potential future emitting regions (a) result in global-mean cooling spanning a 14x range (b, y-axis), differing substantially in the degree to which that cooling is felt in the emitting region (b, x-axis). This work is part of a larger $1.5-million
Thomas Beermann, CEO of car2go Europe GmbH, has presented six assumptions on the future of car sharing: Free-floating car sharing is at the beginning of its development. Mobility with the private car has already reached its limits with traffic jams, lack of parking spaces and pollution being the results.
The researchers are presenting this work at the Goldschmidt Geochemistry Conference in Barcelona this week. The only product of this process is hydrogen, meaning that it the technology is effectively pollution and emission free. The process can also be applied to mainstream oil fields, causing them to produce hydrogen instead of oil.
Based on a three-year study of toxic and environmentally relevant pollutants from gasoline direct injection (GDI) engines, Swiss researchers have concluded that some GDI engines emit just as many soot particles as unfiltered diesel cars did in the past. Further, the GDI particles carry numerous carcinogenic substances. Click to enlarge.
Microbiologists from the University of Essex, UK are exploring the use of microbes to break down and remove toxic compounds from heavy crude and oil sands. NAs are resistant to breakdown and persist as pollutants in the water used to extract the oils and tar. This water is contained in large settling or tailing ponds.
In a paper being presented at WCX SAE World Congress Experience in Detroit this week, a team from MIT is proposing the use of a flex-fuel gasoline-alcohol engine approach for a series-hybrid powertrain for long-haul Class 8 trucks. Ethanol or methanol would be employed to increase knock resistance. —Daniel Cohn.
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