Removal of Mercury from Low-Concentration Aqueous Streams Using Chemical Reduction and Air Stripping

Field, laboratory, and engineering data confirmed the efficacy of chemical reduction and air stripping as a low concentration mercury treatment concept for water containing Hg(II). The process consists of dosing the water with low levels of stannous chloride [Sn(II)] to convert the mercury to elemen...

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Published in:Journal of environmental engineering (New York, N.Y.) N.Y.), 2003-09, Vol.129 (9), p.819-825
Main Authors: Looney, Brian B, Denham, Miles E, Vangelas, Karen M, Bloom, Nicolas S
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cited_by cdi_FETCH-LOGICAL-a442t-f82d763a1539dd94bbbaee0e313ef0d36bf597a0a8e085afdc4a9083c95a384f3
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description Field, laboratory, and engineering data confirmed the efficacy of chemical reduction and air stripping as a low concentration mercury treatment concept for water containing Hg(II). The process consists of dosing the water with low levels of stannous chloride [Sn(II)] to convert the mercury to elemental mercury (Hg0). Hg0 can easily be removed from the water by air stripping or sparging. We studied this concept for groundwater containing initial mercury concentrations of approximately 138 ng/L (0.00069 mol/L). In undosed samples, sparging removed 0% of the initial mercury. Removal in the treated samples varied by reagent dose. Low reagent doses, with Sn:Hg stoichiometric ratios 94%) and yielded final mercury concentrations
doi_str_mv 10.1061/(ASCE)0733-9372(2003)129:9(819)
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subjects TECHNICAL PAPERS
title Removal of Mercury from Low-Concentration Aqueous Streams Using Chemical Reduction and Air Stripping
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