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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Removal of Pb2+ and Cr3+ from aqueous solution by natural zeolites associated with eruptive rocks from the serra geral formation, Paraná sedimentary basin

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Author(s):
Mirian Chieko Shinzato [1] ; Tarcísio José Montanheiro [2] ; Valdecir de Assis Janasi [3] ; Sandra Andrade [4] ; Jorge Kazuo Yamamoto [5]
Total Authors: 5
Affiliation:
[1] Universidade Federal de São Paulo - Brasil
[2] Secretaria do Meio Ambiente do Estado de São Paulo. Instituto Geológico - Brasil
[3] Universidade de São Paulo. Instituto de Geociências - Brasil
[4] Universidade de São Paulo. Instituto de Geociências - Brasil
[5] Universidade de São Paulo. Instituto de Geociências - Brasil
Total Affiliations: 5
Document type: Journal article
Source: Química Nova; v. 32, n. 8, p. 1989-1994, 2009-00-00.
Field of knowledge: Physical Sciences and Mathematics - Geosciences
Abstract

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. (AU)