Fine Particles Articles

  • Phosphate Mine Tailings - Case Study

    THE CHALLENGE A typical phosphate mining operation can produce between 180,000 and 225,000 gallons per minute of fine phosphatic clay tailings. This material has a solids concentration of between 2% and 7% on a dry-solids basis. Currently, ponds and lagoons are used for settling and clarification of these materials. Many of these polishing ponds are approximately 200 to 300 acres in size, ...

  • 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.

  • 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 ...

  • Detection of pentachlorophenol in wood

    MATRIX: Wood, reduced to fine shavings or sawdust ANALYTE: Pentachlorophenol (PCP) RANGE OF DETECTION: 1 to 100 ppm MATERIALS: Pentachlorophenol RaPID AssayÒ Kit and Sample Diluent Reagents: acetonitrile (pesticide grade). Equipment: reciprocating shaker, plastic bottles (polypropylene or high density ...


  • Detection of PCBs in wood

    MATRIX: Wood, reduced to fine shavings or sawdust ANALYTE: Polychlorinated biphenyls (PCB) LIMIT OF DETECTION: 2 ppm as Aroclor 1260 MATERIALS: PCB EnSys 12T Soil Test System, Equipment: Tools for reducing wood to fine particles (refer to sample treatment section below). SAMPLE ...


  • Overview of Airborne metals regulations, exposure limits, health effects, and contemporary research case study

    One of the consequences of the current state of industrialization and an increasing demand for modern conveniences and improved quality of life has been an increased exposure to air pollutants from industrial activities, traffic, and energy production. Regulatory bodies, such as federal, state, and local environmental protection agencies, are responsible for assuring the public that the air is ...


    By Cooper Environmental

  • 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

  • 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

  • Natural ferrihydrite as an agent for reducing turbidity caused by suspended clays

    Received for publication October 22, 2008. Biologically impaired waters are often caused by the turbidity associated with elevated suspended sediment concentrations. Turbidity can be reduced by the addition of positively charged compounds that coagulate negatively charged particles in suspension, causing them to flocculate. This research was conducted to determine the effectiveness of ...

  • 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

  • Natural ferrihydrite as an agent for reducing turbidity caused by suspended clays

    Biologically impaired waters are often caused by the turbidity associated with elevated suspended sediment concentrations. Turbidity can be reduced by the addition of positively charged compounds that coagulate negatively charged particles in suspension, causing them to flocculate. This research was conducted to determine the effectiveness of ferrihydrite, a poorly crystalline Fe oxide, as a ...

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