Fractionator for size classification of aerosolized solid particulate matter

Crystalline components of stack-collected, size-fractionated coal fly ash

“…The ash samples used in this study have been described in detail in previous papers (6)(7)(8)(9)(10)(11). The size-fractionated samples were obtained from the stack breeching, downstream from the electrostatic precipitator (ESP), of a large coal-fired power plant in the southwestern U S .…”

“…In spite of the availability of several sensitive analytical methods of determining the oxidation state of arsenic in aqueous media (7)(8)(9)(10), no application of these methods to ash pond effluents and ash leachate has been attempted. In the present study the distribution of dissolved inorganic arsenic between trivalent and pentavalent oxidation states was measured in fresh ash sluice water, in the pore water from the saturated zone of an ash deposit, and in ash pond surface water effluent.…”

Short-Term Bioassays in the Analysis of Complex Environmental Mixtures II

“…The fly ash samples described below were collected from a western U.S. power plant burning low--sulfur (0.5%), high-ash (20%) coal (McFarland et al, 1977a). Unless otherwise indicated, the samples were collected and size-fractioned in situ at 95°C downstream of the plant's electrostatic precipitator (ESP).…”

Development of a single cyclone separator with three stages for size-selective sampling of particles

“…McFarland, Bertch, Fisher, and Prentice (1977) employed an apparatus consisting of a series of two cyclones and a centripeter, and fractionated fly ash from stack gas to have volume median diameters of 20 μm, 6.3 μm, 3.2 μm, and 2.2 μm with geometric standard deviations of about 1.8. Smith, Wilson, and Harris (1979) developed a five-stage cyclone system for in situ sampling with cut points of 5.4 μm, 2.1 μm, 1.4 μm, 0.65 μm, and 0.32 μm, by connecting five cyclone separators in series.…”