utilização de zeólitas sintetizadas a partir de xisto retortado na remoção de arsênio em águas contaminadas use of zeolites synthesized from oil shale ash for arsenic removal from polluted water
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utilização de zeólitas sintetizadas a partir de xisto retortado na remoção de arsênio em águas contaminadas use of zeolites synthesized from oil shale ash for arsenic removal from polluted water

;Nádia Regina Camargo Fernandes-Machado;Denise Maria Malachini Miotto-Bigatão
greece and rome 2007 Vol. 30 pp. 1108-1114
183
fernandes-machado2007qumicautilizao

Abstract

The solid by-product of the oil shale processing (PETROBRAS - Brazil) was used as raw material to synthesize zeolites A and faujasite. Alkaline fusion followed by hydrothermal treatment was the synthesis procedure used, and five different starting material compositions were obtained. The more crystalline zeolite-type materials synthesized, the pretreated oil shale ash and commercial zeolites were used as adsorbents in the purification of pollutant solutions with arsenic. The zeolite-type material composed of a mixture of zeolite A (42.6%) and faujasite (52.9%) presented an ion exchange capacity comparable to the pure zeolites A and faujasite, much better than the pretreated ash.

Keywords

zeolites

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DOI:
10.1590/S0100-40422007000500011
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