Concentrations of trace metals

The biotreated SCGP-1 effluent contains fully oxidized products and very low concentrations of trace metals ... 

Law, R.J., C.F. Fileman, A.D. Hopkins, J.R. Baker, J. Harwood, D.B. Jackson, S. Kennedy, A.R. Martin, and RJ. Morris. 1991. Concentrations of trace metals in the livers of marine mammals (seals, porpoises and dolphins) from waters around the British Isles. Mar. Pollut. Bull. 22 183-191. 

Table 11. The concentration of trace metals in atmospheric deposition and ground waters of Siberian Taiga Forest ecosystems, pg/L (after Shvarlsev, 1978 Dobrovolsky, 1994).

Table 12. The average concentrations of trace metals in ground waters of Siberian Boreal and Sub-Boreal Forest ecosystems, fig/L (after Dobrovolsky, 1994).

Weng L, Temminghoff EJM, van Riemsdijk WH. Determination of the free ion concentration of trace metals in soil solution using a soil column Donnan membrane technique. Ear. J. Soil Sci. 2001 52 629-637. 

Table 28.8 Comparison of the Dissolved Concentrations of Trace Metals (nM) in the Ocean Outfall Seawater off the Tanshui Coast and in Other Heavily Polluted Marine Environments around the World. ...

Barrie LA, Lindberg SE, Chan WH, et al. 1987. On the concentration of trace metals in precipitation. Atmos Environ 21 1133-1135. 

Bruno, J., Duro, L. etal. 1998. Estimation of the concentrations of trace metals in natural systems. The application of codissolution and coprecipitation approaches to El Berrocal (Spain) and Pocos de Caldas (Brazil). Chemical Geology, 151, 277-291. 

The Clean Air Act of 1990 has made trace metal content in fuels and wastes the final ash-related compositional characteristic of significance. Considerable attention is paid (ca 1993) to emissions of such metals as arsenic, cadmium, chromium, lead, mercury, silver, and zinc. The concentration of these metals in both grate ash and flyash is of significance as a result of federal and state requirements of particular importance is the mobility of metals. This mobility, and the consequent toxicity of the ash product, is determined by the Toxic Characteristic Leaching Procedure (tclp) test. Tables 8—10 present trace metal contents for wood wastes and agricultural wastes, municipal waste, and refuse-derived fuel, respectively. In Table 8, the specific concentration of various components in the RDF governs the expected average concentration of trace metals. 

Mickey, J.W. and Moore, J.N. (1997) The effects of discharge variation on the dissolved concentrations of trace metals and arsenic through Milltown Reservoir, Montana. Abstracts with Programs-Geological Society of America, 29(6), 149. 

Ruiz, J.M. and J.I. Saiz-Salinas. 2000. Extreme variation in the concentration of trace metals in sediments and bivalves from the Bilbao estuary (Spain) caused by the 1989-90 drought. Mar. Environ. Res. 49 307-317. 

The effect of the concentration of trace metal ions on the conversion rate and vitamin B12 production was investigated first. As shown in the Figs. 2... 

Fig. 3. Course of vitamin B12 production, methane production, and methanogen density with different concentrations of trace metals ion added using rock wool fixed-bed reactor.

Zhao FJ, McGrath SP, Merrington G. 2007. Estimates of ambient background concentrations of trace metals in soils for risk assessment. Environ Pollut 148 221-229. 

Manganese oxides have a high affinity for many of the trace metals.5 6 In addition to surface adsorption, trace metals accumulate in Mn oxides by substitution and coprecipitation.7 The adsorptive properties of Mn oxides for metals observed in the laboratory are verified in soils, as Mn oxide nodules separated from soils contain concentrations of trace metals that are considerably greater than the metal concentrations in the bulk soil.7 8 The potential for association of trace metals with Mn oxides via co-precipitation or substitution is high when soils are subject to alternate wetting and drying cycles,9 and Mn oxide crystals are forming. 

Probably the most popular and, as it proved to be, the most contentious use of hair analysis was its application to the evaluation of nutritional deficiencies. Many food faddists, pharmacists, nutritionists, and some physicians were convinced that a person s well being was influenced by the concentration of trace metals in his hair. The demands for hair analysis became very large. Many laboratories, some with dubious competence, were estabhshed to satisfy what seemed to be a limitless, ever growing service demand. With the passage of time, however, proponents of this... 

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