Sludge-Amended Brick Production: Applicability for Metal-Laden Residues
Studies had shown the feasibility of disposing of sewage sludge by incorporation into bricks. Laboratory experiments were carried out on the fate of metals in this process. Most metals would be trapped within the brick during both firing and weathering as a result of a silicate-based physico-chemica...
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Veröffentlicht in: | Water science and technology 1990-01, Vol.22 (12), p.309-317 |
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creator | Alleman, Ja Bryan, Eh Stumm, Ta Marlow, Ww Hocevar, Rc |
description | Studies had shown the feasibility of disposing of sewage sludge by incorporation into bricks. Laboratory experiments were carried out on the fate of metals in this process. Most metals would be trapped within the brick during both firing and weathering as a result of a silicate-based physico-chemical containment mechanism. Volatilization during firing occurred only with selenium, and then only when very high concentrations of the metal were added to the sludge. Simulated weathering at pH 2.5 and 5.0 produced leaching losses for arsenic, selenium and cadmium only marginally above the U.S. EPA extraction procedure limits, and again only when the metal concentrations were very high. Municipal sewage sludge with normal metal concentrations could safely be used in brick manufacture. |
doi_str_mv | 10.2166/wst.1990.0125 |
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Laboratory experiments were carried out on the fate of metals in this process. Most metals would be trapped within the brick during both firing and weathering as a result of a silicate-based physico-chemical containment mechanism. Volatilization during firing occurred only with selenium, and then only when very high concentrations of the metal were added to the sludge. Simulated weathering at pH 2.5 and 5.0 produced leaching losses for arsenic, selenium and cadmium only marginally above the U.S. EPA extraction procedure limits, and again only when the metal concentrations were very high. Municipal sewage sludge with normal metal concentrations could safely be used in brick manufacture.</abstract><cop>London</cop><pub>IWA Publishing</pub><doi>10.2166/wst.1990.0125</doi><tpages>9</tpages></addata></record> |
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source | EZB-FREE-00999 freely available EZB journals |
subjects | Acetic acid Arsenic Cadmium Containment Leachates Manufacturing industry Metal concentrations Metals Selenium Sludge Vitrification Weathering |
title | Sludge-Amended Brick Production: Applicability for Metal-Laden Residues |
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