The fixation and leaching of cement stabilized arsenic

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Leist, Michael, Casey, John and Caridi, Domenico (2003) The fixation and leaching of cement stabilized arsenic. Waste Management, 23 (4). pp. 353-359. ISSN 0956-053x

Abstract

The solidification/stabilization of sodium arsenite, sodium arsenate, arsenic trioxide and arsenic pentoxide at dosages of approximately 10% has been investigated using sequential batch leaching tests. The leaching of arsenic, which was found to be diffusion based, was clearly least effective for those formulations containing additional iron(II). Calcium was found to influence the leaching of cement immobilized arsenic: those formulations containing the greatest Ca:As mole ratios were generally the most successful. Analysis using both FTIR and SEM revealed substantial changes to the cement matrices of those formulations to which the ferrous sulfate had been added. Ettringite was identified in the cement+ferrous sulfate formulations.

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Item type	Article
URI	https://vuir.vu.edu.au/id/eprint/1049
DOI	10.1016/S0956-053X(02)00116-2
Official URL	http://dx.doi.org/10.1016/S0956-053X(02)00116-2
Subjects	Historical > RFCD Classification > 300000 Agricultural, Veterinary and Environmental Sciences Historical > RFCD Classification > 250000 Chemical Sciences Historical > Faculty/School/Research Centre/Department > School of Engineering and Science
Keywords	arsenic analysis, arsenic chemistry, calcium chemistry, carcinogens analysis, carcinogens chemistry, conservation of natural resources, construction materials, diffusion, environmental pollution prevention & control, microscopy, electron, scanning, refuse disposal, spectroscopy, fourier transform infrared;
Citations in Scopus	62 - View on Scopus
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