Emissions and particle-size distributions of minor and trace elements at two western coal-fired power plants equipped with cold-side electrostatic precipitators

1979 ◽  
Vol 13 (8) ◽  
pp. 946-953 ◽  
Author(s):  
John M. Ondov ◽  
Richard C. Ragaini ◽  
Arthur H. Biermann
Keyword(s):  
Particle Size ◽  
Trace Elements ◽  
Power Plants ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Cold Side ◽  
Minor And Trace Elements ◽  
Electrostatic Precipitators

Agglomeration of High Calcium Fly Ash for Utilization II. Binding Mechanisms

1989 ◽  
Vol 178 ◽  
Author(s):  
Carol L. Kilgour ◽  
Kenneth L Bergeson ◽  
Scott Schlorholtz
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Particle Size ◽  
Power Plants ◽  
Layer Structure ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Fly Ashes ◽  
High Calcium ◽  
Scanning Electron

AbstractFly ashes from the Lansing and Ottumwa power plants in Iowa were agglomerated by means of a continuous pan agglomerator, a continuous auger and a batch turbine agglomerator. In order to compare agglomeration mechanisms the following parameters were determined: (a) particle size distributions of the untreated fly ashes; (b) particle size distributions of the agglomerated fly ashes; (c) pore size distribution of agglomerates; (d) crystalline hydration products by X-ray diffraction; and (e) morphological characterization by scanning electron microscopy.In the batch system coalescence mechanisms were favoured. The agglomerates were fairly irregular in shape and had a rough surface texture. As residence time in the system increased breakage of agglomerates occurred, reducing the average agglomerate size. In the continuous systems layering of the fine feed particles onto established agglomerates was the predominant growth mechanism. The agglomerates were smooth and spherical. The layer structure was observed by scanning electron microscopy. Agglomerates of widely varying size, strength, and pore matrix can be produced in both systems. It is envisaged that while agglomerates could be produced with characteristics essential for their proposed end use by either method, continuous pan agglomeration would be the most versatile system to utilize.

scholarly journals Concentrations, particle-size distributions, and dry deposition fluxes of aerosol trace elements over the Antarctic Peninsula in austral summer

2021 ◽  
Vol 21 (3) ◽  
pp. 2105-2124
Author(s):  
Songyun Fan ◽  
Yuan Gao ◽  
Robert M. Sherrell ◽  
Shun Yu ◽  
Kaixuan Bu
Keyword(s):  
Particle Size ◽  
Trace Elements ◽  
Antarctic Peninsula ◽  
Dry Deposition ◽  
Austral Summer ◽  
Size Distributions ◽  
Western Antarctic Peninsula ◽  
Particle Size Distributions ◽  
Deposition Fluxes ◽  
Palmer Station

Abstract. Size-segregated particulate air samples were collected during the austral summer of 2016–2017 at Palmer Station on Anvers Island, western Antarctic Peninsula, to characterize trace elements in aerosols. Trace elements in aerosol samples – including Al, P, Ca, Ti, V, Mn, Ni, Cu, Zn, Ce, and Pb – were determined by total digestion and a sector field inductively coupled plasma mass spectrometer (SF-ICP-MS). The crustal enrichment factors (EFcrust) and k-means clustering results of particle-size distributions show that these elements are derived primarily from three sources: (1) regional crustal emissions, including possible resuspension of soils containing biogenic P, (2) long-range transport, and (3) sea salt. Elements derived from crustal sources (Al, P, Ti, V, Mn, Ce) with EFcrust<10 were dominated by the coarse-mode particles (>1.8 µm) and peaked around 4.4 µm in diameter, reflecting the regional contributions. Non-crustal elements (Ca, Ni, Cu, Zn, Pb) showed EFcrust>10. Aerosol Pb was primarily dominated by fine-mode particles, peaking at 0.14–0.25 µm, and likely was impacted by air masses from southern South America based on air mass back trajectories. However, Ni, Cu, and Zn were not detectable in most size fractions and did not present clear size patterns. Sea-salt elements (Ca, Na+, K+) showed a single-mode distribution and peaked at 2.5–4.4 µm. The estimated dry deposition fluxes of mineral dust for the austral summer, based on the particle-size distributions of Al measured at Palmer Station, ranged from 0.65 to 28 mg m−2 yr−1 with a mean of 5.5±5.0 mg m−2 yr−1. The estimated dry deposition fluxes of the target trace elements in this study were lower than most fluxes reported previously for coastal Antarctica and suggest that atmospheric input of trace elements through dry deposition processes may play a minor role in determining trace element concentrations in surface seawater over the continental shelf of the western Antarctic Peninsula.

Fine particle size distributions of seven different combustion power plants

1998 ◽  
Vol 29 ◽  
pp. S459-S460 ◽  
Author(s):  
M. Moisio ◽  
A. Laitinen ◽  
J. Hautanen ◽  
J. Keskinen
Keyword(s):  
Particle Size ◽  
Fine Particle ◽  
Power Plants ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Fine Particle Size

Particle Size Distributions of Trace Elements in Pollution Aerosols

AIHAJ ◽  
1972 ◽  
Vol 33 (9) ◽  
pp. 569-575 ◽  
Author(s):  
GORDON D. NIFONG ◽  
EDWARD A. BOETTNER ◽  
JOHN W. WINCHESTER
Keyword(s):  
Particle Size ◽  
Trace Elements ◽  
Size Distributions ◽  
Particle Size Distributions

254. A Comparison of the Particle Size Distributions for Aerosols Generated During Wet Grinding and Dry Deburring of Beryllium

1999 ◽  
Author(s):  
K.K. Ellis ◽  
R. Buchan ◽  
M. Hoover ◽  
J. Martyny ◽  
B. Bucher-Bartleson ◽  
...  
Keyword(s):  
Particle Size ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Wet Grinding
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