Fine Particles Articles

  • Loading capacity of silica flash cartridges

    FlashPure Cartridges Optimizing flash chromatography requires finding the ideal cartridge and conditions for a given sample. As the goal is to prepare the largest possible amount of pure sample in the shortest possible time and with a minimum use of solvent, it is crucial to know how high loadings affect the separation for different cartridges. Unlike analytical chromatography, preparative ...


    By BÜCHI Labortechnik AG

  • Smudging, the why, the where and possible health concerns

    Traditions serve an important function to keep a culture’s history and to engage the community. Rituals that include smoke or incense are widespread and can be found in Buddhist temples across Asia, the Roman Catholic and Greek Orthodox churches as well as indigenous tribes like the First Nations in North America. Smudging is one of those traditions that is common for many First Nations. ...


    By Allerair Industries

  • 55 years of haze: How plane bound for KL overflew to Singapore when it was all hazy on Oct 19, 1961

    Good weather may have kept the haze away from Singapore for now, but it is unlikely that the seasonal plague is gone for good. Plumes of smoke haze have clouded Singapore’s skies almost every year from as far back as the 1960s, with the first haze episode reported on Oct 19, 1961. We look back at 55 years of haze history: 1. When it all started A heavy haze ...


    By Camfil Ltd

  • Characteristics of phosphorus sorption at the sediment–water interface in Dongting Lake, a Yangtze-connected lake

    Phosphorus in sediments plays an important role in lake eutrophication. This study investigated the phosphorus sorption characteristics of sediments in a river-connected lake and identified the phosphorus source or sink areas in the lake. Sediment samples with different physicochemical characteristics were collected in 2011 and 2013 from Dongting Lake, which is connected to the world's third ...


    By IWA Publishing

  • What are we doing to our children’s brains?

    Environmental chemicals are wreaking havoc to last a lifetime The numbers are startling. According to the U.S. Centers for Disease Control and Prevention, about 1.8 million more children in the U.S. were diagnosed with developmental disabilities between 2006 and 2008 than a decade earlier. During this time, the prevalence of autism climbed nearly 300 percent, while that of ...


    By Ensia

  • Study of mineral aerosols in fine (PM 2.5 ) and coarse (PM 10 ) atmospheric particles over a world heritage site at Agra, India

    PM 2.5 and PM 10 samples were collected at different sites from Agra to see their monthly and seasonal trends along with associated mineral aerosols. Annual mean mass concentrations of PM 2.5 and PM 10 over Agra were 104.25 and 261.89 µg/m 3 respectively. The monthly average varied from 26.94 to 211.56 µg/m 3 and 126.05 to 474.31 µg/m ...


    By Inderscience Publishers

  • Traffic emission effects on ambient air pollution by PM2.5–related PAH in Upper Silesia, Poland

    The ambient concentration of particle–bound polycyclic aromatic hydrocarbons (PAHs) was investigated in two industrial towns in Upper Silesia, Poland. The 24 h samples of PM2.5 (particles with aerodynamic diameter ≤ 2.5 µm) were collected simultaneously at busy roads (or crossroads) and at an urban background site. Additionally, the samples were collected during the heaviest traffic density (rush ...


    By Inderscience Publishers

  • Bioaccesible heavy metals‐sediment particles from Reconquista River induce lung inflammation in mice

    The Reconquista River (RR), one of the most polluted watercourses in Argentina, receives effluent discharges from heavily industrialized and highly populated settlements. During winter and summer, the floodplain remains dry, producing the oxidation of sulfide and organic matter present in the sediment, making heavy metals more bio‐accessible. Dispersion of this sediment occurs, and thus harmful ...


    By John Wiley & Sons, Ltd.

  • Accumulation and distribution characteristics of platinum group elements in roadside dusts in Beijing, China

    The concentrations, distribution, and accumulation of platinum group elements (PGEs) were investigated in roadside dusts collected in four different foundational areas in Beijing during February to May 2010. The results showed that PGE levels in all samples were above the average upper crust values, with mean concentrations of 57.5 ng · g−1 Pd, 28.2 ng · g−1 Pt, and 9.8 ng · g−1 Rh, respectively. ...


    By John Wiley & Sons, Ltd.

  • What is the size distribution and sources of particles in ambient air?

    The particle sizes in the ambient air are ranged from 1 nanometer to slightly more than 10 micrometers. There are three modes: coarse, fine and nano. The course mode particles are road dusts, spores and pollens. The minimum sizes of these particles are 1 to 3 micrometers. The fine mode particles are generally secondary particles formed from reactions such as smoke, sulfates, nitrates, ammonium ...

  • Office Printers Emit Ultra fine particle pollution

    We’ve heard quite a bit about particulate matter PM10s and PM2.5s as components of air pollution that we are exposed to on a daily basis. Recent research papers are highlighting the dangers of ultra fine particles (UFPs), which have a diameter of less than 0.1 micrometres (or 100 nanometres). By contrast, the diameters of particulate pollution from PM10s and ...


    By Commercial Air Filtration

  • Ultrasonics: a sound mixing technology

    When liquid mixing, dispersing or homogenising is required in the lab, people tend to think of rotary mixers, although this traditional technology has limitations that can be costly both in time and material. Ultrasonics is the preferred innovative technology for various mixing applications in the lab. It combines extremely efficient and ultra effective high shear power with the added benefit of ...


    By Hielscher Ultrasonics GmbH

  • Hielscher Ultrasonics: Sonocatalysis

    In many chemical manufacturing processes catalysis is involved to increase the reaction rate. The use of ultrasound is a potential way to speed up the chemical catalysis. During the sonication of liquids, the accoustic wavelength range between approx. 110 and 0.15 mm for frequencies of 18kHz and 10Mhz. This is significantly higher than those of molecular dimensions, resulting in that there is ...


    By Hielscher Ultrasonics GmbH

  • Geochemical behaviour of the aerosol sampled in a suburban zone of Sfax City (Tunisia)

    This work examines the geochemistry of the soluble elements (Ca2+, Mg2+, Fe2+ + Fe3+, Na+, K+, NH4+, Cl−, NO3−, SO42− and PO43−) present in the aerosol collected from a suburban site in Sfax City (Tunisia), which is frequently subjected to the urban plume. The descriptive study showed the influence of enrichment sources and meteorological factors. Complementary statistical approaches based on ...


    By Inderscience Publishers

  • Atmospheric lead concentrations near roadways in a suburban part of Istanbul

    In this study, daily aerosol samples of fine (PM2.5) and coarse (PM2.5−10) particles were collected at Buyukcekmece (41°2′35″N, 28°35′25″E), a sub-urban part of Istanbul, Turkey. Sampling area is under the impact of two main transport arteries, namely the Trans European Motorway (TEM) and E5 motorways. Atmospheric lead levels measured in this study were compared with those reported previously ...


    By Inderscience Publishers

  • Investigating the fate of nitroaromatic (TNT) and nitramine (RDX and HMX) explosives in fractured and pristine soils

    Received for publication November 6, 2008. Explosives compounds, known toxins, are loaded to soils on military training ranges predominantly during explosives detonation events that likely fracture soil particles. This study was conducted to investigate the fate of explosives compounds in aqueous slurries containing fractured and pristine soil particles. Three soils were crushed with a piston to ...

  • Atmospheric aerosols behaviour at an industrial area in Northern France

    Aerosols samplings by bulk filtration and by use of a high volume cascade impactor were performed taking into account wind directions simultaneously at an urban and a rural site in Northern France. Fifteen major and trace species were considered to study characteristics of the particles collected. Evolution of the Weighted Mean Diameter vs. the wind direction, profiles of the Mass Size Function ...


    By Inderscience Publishers

  • Urgent CAIR needed

    On July 11, 2008, the US Court of Appeals for the District of Columbia Circuit vacated (overturned) the US Clean Air Interstate Rule (CAIR). Adopted in 2005, CAIR was a centerpiece of the US Environmental Protection Agency’s (EPA) strategy to reduce multiple pollutants from major stationary sources. CAIR was expected to reduce power plant emissions in 28 eastern states and the District of ...

  • Effect of prenatal exposure to fine particles and postnatal indoor air quality on the occurrence of respiratory symptoms in the first two years of life

    The purpose of this study was to assess an impact of prenatal exposure to fine particles (PM2.5) on the risk of developing respiratory symptoms in early childhood. The study was carried out in a cohort of 465 newborns in Krakow (Poland) who have been followed over the first two years of life. The children exposed to medium level of PM2.5 (>35.3?53.4 µg/m³) had 13% more wheezing days (IRR = 1.13; ...


    By Inderscience Publishers

  • Fine China

    A daily commute in West Michigan might take someone to Grand Rapids or Kalamazoo. But this January, Jeannie Jansma of Sebright Products in Hopkins headed to work on the other side of the world. As Sebright’s marketing director, Jansma spent 10 days in China meeting with her Asian counterparts in the pulp and paper industry to look for new technology and to learn what the United States needs to ...


    By Sebright Products, Inc.

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