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Journal of Material Cycles and Waste Management

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03.10.2016 | ORIGINAL ARTICLE

Examination of the influence of dissolved halite (NaCl) on the leaching of lead (Pb) from cement-based solidified wastes

verfasst von: Constantin Bobirică, David T. Long, Matthew J. Parsons, Rodica Stănescu, Thomas C. Voice

Erschienen in: Journal of Material Cycles and Waste Management | Ausgabe 1/2018

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Abstract

The leaching of lead from cement-based solidified waste forms mixed at different water/cement ratios was studied by conducting equilibrium and semi-dynamic leaching tests using deionized water and sodium chloride solutions. The results suggest that leaching of the primary constituents of the cement (calcium, silicon and sulfate) is controlled by solubility equilibria, with increased leaching into chloride solutions due to ionic strength effects. The original porosity of the waste forms increased with water/cement ratio and chloride solutions further increased it as a result of decalcification. Lead leaching was generally low, and appears to be a transport-controlled process, such that leaching correlates positively with porosity.

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Titel: Examination of the influence of dissolved halite (NaCl) on the leaching of lead (Pb) from cement-based solidified wastes
verfasst von: Constantin Bobirică
David T. Long
Matthew J. Parsons
Rodica Stănescu
Thomas C. Voice
Publikationsdatum: 03.10.2016
Verlag: Springer Japan
Erschienen in: Journal of Material Cycles and Waste Management / Ausgabe 1/2018
Print ISSN: 1438-4957
Elektronische ISSN: 1611-8227
DOI: https://doi.org/10.1007/s10163-016-0552-6

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