Remoção de Pb2+ e Cr3+ em solução por zeólitas naturais associadas a rochas eruptivas da formação serra geral, bacia sedimentar do Paraná Removal of Pb2+ and Cr3+ from aqueous solution by natural zeolites associated with eruptive rocks from the serra geral formation, Paraná sedimentary basin

• Published in: Química nova Vol. 32; no. 8; pp. 1989 - 1994
• Main Authors: Mirian Chieko Shinzato, Tarcísio José Montanheiro, Valdecir de Assis Janasi, Sandra Andrade, Jorge Kazuo Yamamoto
• Format: Journal Article
• Language: English
• Published: Sociedade Brasileira de Química 01-01-2009
• Subjects: adsorption; heavy metals; natural zeolites
• ISSN: 0100-4042; 1678-7064
• DOI: 10.1590/S0100-40422009000800002

The capacity of natural zeolites and its host rock (dacite) to remove Pb2+ and Cr3+ from aqueous solutions has been investigated. Results showed that both samples prefer to remove Pb2+ instead of Cr3+. Almost 100% of Pb2+ was removed from solutions with concentration until 50 mg L-1 and 100 mg L-1 of this metal, respectively by dacite and zeolite. The equilibrium of metals adsorption process was reached during the first 30 min by both materials. Na+ can be used to recover Pb2+, but not to remove Cr3+ from the treated samples. The Sips model showed a good fit for experimental data of this study.