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

• Main Authors: Nádia Regina Camargo Fernandes-Machado, Denise Maria Malachini Miotto-Bigatão
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 2007-10-01
• Series: Química Nova
• Subjects: zeolites; oil shale ash; arsenic
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422007000500011

<abstract language="eng">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.