LAPSE:2023.28111
Published Article
LAPSE:2023.28111
Sapo-34 Obtained from Amazonian Flint Kaolin: Influence of Impurities of “Oxidized Fe/Ti” in Synthesis and Its Application in the Removal of Cationic Dye from Water
April 11, 2023
Non-processed kaolin (flint kaolin) from a mine located in the Capim area (Amazon region, northern Brazil), usually considered as waste, was selected as a source of silicon and aluminum in the synthesis of SAPO-34. This is a molecular sieve and cationic exchanger chosen for tests focusing on the removal of methylene blue in aqueous solutions, which is a cationic dye widely used by textile industries in Brazil. The results revealed that the SAPO-34 has been successfully synthesized with typical cubic morphology, good crystallinity (>90%), and thermal stability (~998 °C). Although the oxidized Fe/Ti impurities contained in the flint kaolin affect the degree of crystallinity of the zeolitic product, its adsorptive properties are not significantly affected, which demonstrates the excellent adsorption results (pH = 11; % removal > 90%). It proved to be an adsorbent with considerable adsorption capacity (9.83 mg·g−1). The pH test confirmed the acidic surface characteristics (pH solution 2−4; ↓ removal), and the kinetic model that best fitted the experimental data was pseudo-second-order, with R2 = 0.998 (kinetics controlled by chemisorption).
Record ID
Keywords
Adsorption, Amazonian kaolin, dye, SAPO-34, separation process
Subject
Suggested Citation
Pinheiro DR, Pinheiro AP, Pontes FA, Soares JVK, Neves RF, Paz SPA. Sapo-34 Obtained from Amazonian Flint Kaolin: Influence of Impurities of “Oxidized Fe/Ti” in Synthesis and Its Application in the Removal of Cationic Dye from Water. (2023). LAPSE:2023.28111
Author Affiliations
Pinheiro DR: Programa de Pós-Graduação em Engenharia de Recursos Naturais da Amazônia PRODERNA/ITEC/UFPA, Rua Augusto Correa, 01, Belém 66075-110, PA, Brazil [ORCID]
Pinheiro AP: Programa de Pós-Graduação em Engenharia de Recursos Naturais da Amazônia PRODERNA/ITEC/UFPA, Rua Augusto Correa, 01, Belém 66075-110, PA, Brazil
Pontes FA: Programa de Pós-Graduação em Engenharia de Recursos Naturais da Amazônia PRODERNA/ITEC/UFPA, Rua Augusto Correa, 01, Belém 66075-110, PA, Brazil
Soares JVK: Faculdade de Engenharia Química FEQ/ITEC/UFPA, Rua Augusto Correa, 01, Belém 66075-110, PA, Brazil
Neves RF: Faculdade de Engenharia Química FEQ/ITEC/UFPA, Rua Augusto Correa, 01, Belém 66075-110, PA, Brazil
Paz SPA: Programa de Pós-Graduação em Engenharia de Recursos Naturais da Amazônia PRODERNA/ITEC/UFPA, Rua Augusto Correa, 01, Belém 66075-110, PA, Brazil; Faculdade de Engenharia Química FEQ/ITEC/UFPA, Rua Augusto Correa, 01, Belém 66075-110, PA, Brazil
Pinheiro AP: Programa de Pós-Graduação em Engenharia de Recursos Naturais da Amazônia PRODERNA/ITEC/UFPA, Rua Augusto Correa, 01, Belém 66075-110, PA, Brazil
Pontes FA: Programa de Pós-Graduação em Engenharia de Recursos Naturais da Amazônia PRODERNA/ITEC/UFPA, Rua Augusto Correa, 01, Belém 66075-110, PA, Brazil
Soares JVK: Faculdade de Engenharia Química FEQ/ITEC/UFPA, Rua Augusto Correa, 01, Belém 66075-110, PA, Brazil
Neves RF: Faculdade de Engenharia Química FEQ/ITEC/UFPA, Rua Augusto Correa, 01, Belém 66075-110, PA, Brazil
Paz SPA: Programa de Pós-Graduação em Engenharia de Recursos Naturais da Amazônia PRODERNA/ITEC/UFPA, Rua Augusto Correa, 01, Belém 66075-110, PA, Brazil; Faculdade de Engenharia Química FEQ/ITEC/UFPA, Rua Augusto Correa, 01, Belém 66075-110, PA, Brazil
Journal Name
Processes
Volume
11
Issue
3
First Page
662
Year
2023
Publication Date
2023-02-22
Published Version
ISSN
2227-9717
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Original Submission
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PII: pr11030662, Publication Type: Journal Article
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LAPSE:2023.28111
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doi:10.3390/pr11030662
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[v1] (Original Submission)
Apr 11, 2023
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Apr 11, 2023
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