Areawide Trace Metal Concentrations Measured by Multielement Neutron Activation Analysis

Trace Metal Associations in Urban Airborne Particulates

“…We have found (Harrison and Winchester, 1971;Langford et al, 1972) in a study of Pb, Cu, and Cd in the Chicago area that a) over most of the study area the relative elemental abundances could be accounted for by their major pollution sources, combustion of gasoline and coal, but b) there must be an anomalous pollution source of Cu in or near East Chicago, Ind., to account for the very high concentrations observed at several sampling locations in this small region. This latter result has since been confirmed by neutron activation (Harrison et al, 1971), but it was totally unexpected when this research was initiated. We conclude that these three elements are mainly derived from pollution sources distributed widely throughout the study area, except for Cu which has an additional pollution source highly localized in one small region.…”

“…The inventory calculation was remarkably successful, even though the published data on which the estimates were based were incomplete in many respects. Some discrepancies between the inventory and published analyses of the National Air Sampling Network were later resolved once a neutron activation area-wide study was completed (Harrison et al, 1971;Dams et al, 1971b). By comparing observations with the prior elemental emissions inventory, biases in the NASN data were found resulting from nonrepresentative sampling locations and in some instances analytical error.…”

A randomized controlled evaluation of absorption of silver with the use of silver alginate (Algidex) patches in very low birth weight (VLBW) infants with central lines

“…The highest particulate levels (mean --10.5 ng/m 3 ; range --0.936-36.5 ng/m 3 ) were measured in Kellogg, Idaho (in the Coeur d'Alene River Basin) near a large smelter complex (Ragaini et al 1977). In an industrialized area of northwest Indiana, silver was measured at less than l-5 ng/m 3 (Harrison et al 1971). A level of 1 ng/m 3 was reported by Douglas (1968) in a rural cloudseeding target area.…”

Sources, Transport and Alterations of Metal Compounds: An Overview. I. Arsenic, Beryllium, Cadmium, Chromium, and Nickel

“…The industrial emissions flux is calculated for the mass of material annually emitted to the atmosphere from industrial activities, 200 x 1012 g (21,22) and the concentration of metals in urban particulates (Table 4). Metal concentrations in urban particulates from the U.S. and Europe have been found to be remarkably similar (23)(24)(25)(26) suggesting that on a global basis the complex and August 1981 varied industrial activities of different industrial nations tend to lead to atmospheric emissions of similar composition (6). As suggested by Lantzy and Mackenzie (6), one method for assessing the importance of the anthropogenic flux for any metal is given by the interference factor (IF) as shown in Table 3.…”