ESM202Lecture_Trace_Elements_2008

ESM202Lecture_Trace_Elements_2008 - Abundant Elements ESM...

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1 1 ESM 202 Trace Elements in the Environment Abundant Elements ± Soils: O H Si Al Fe C Ca K Na Mg Ti ± Crust: O H Si Al Fe Ca M K Ti P ± Ocean: O H Cl Na Mg S K Ca Br C Trace elements: concentration in a solid phase 100 mg/kg (Sposito, The Chemistry of Soils, 1989) 3 trace element
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2 5 Trace Elements 7 Drinking Water Standards Trace Elements
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3 9 Trace Elements Trace Elements 11 Trace Elements 12 Trace Elements
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4 13 Trace Elements ± Metals and other inorganic compounds are used extensively in industry ± Rate of anthropogenic emissions is typically much greater than the natural cycling of these elements ± Concentration levels near industrial operations can be orders of magnitude greater than background 14 Trace Elements 15 Trace Elements ± Coal burning releases large amounts of trace elements to the environment, mostly in “fly ash” ± Fly ash is particularly enriched in metals, particularly V, Pb, Cu, Zn, As, Cr, Se, Ni, Cd ± A typical 1000 MW power plant produces 270,000 tons of fly ash per year Trace Elements
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ESM202Lecture_Trace_Elements_2008 - Abundant Elements ESM...

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