Use of zeolites synthesized from oil shale ash for arsenic removal from polluted water

[摘要] 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.

[学科分类] 化学（综合）

[关键词] zeolites;oil shale ash;arsenic.