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Ion exchange capacity of zeolite A with zinc nitrate and its antimicrobial activity

Authors
  • Kartar Singh, Harnish Kaur1
  • Amin, Zarina1
  • Arshad, Sazmal Effendi1
  • 1 Universiti Malaysia Sabah, Malaysia , (Malaysia)
Type
Published Article
Journal
Pure and Applied Chemistry
Publisher
Walter de Gruyter GmbH
Publication Date
Oct 09, 2020
Volume
93
Issue
1
Pages
39–46
Identifiers
DOI: 10.1515/pac-2019-0811
Source
De Gruyter
Keywords
License
Yellow

Abstract

Various type of zeolites has been produced based on kaolinite and this study likewise utilized kaolin clay as raw material to synthesis zeolite A. Kaolin was in inactive state, therefore it was transformed to metakaolin through dehydroxylation at 800 °C for 4 h. The metakaolin as a source of silica and alumina was then utilized in the synthesis of zeolite A. After hydrothermal synthesis, the zeolite A was exchanged with different concentration of zinc nitrate solution. Zinc content in ion-exchanged zeolite A, ZnA was determined through AAS to calculate the ion exchange capacity. Higher concentration of zinc nitrate had higher zinc content and higher ion exchange capacity. Zeolite A and zinc-exchanged zeolite A were characterized under SEM, XRD and FTIR. Finally, zeolite A and zinc-exchanged zeolite A was used to investigate the antimicrobial properties against gram-negative bacteria, Escherichia coli and gram-positive bacteria Staphylococcus aureus. There was no antimicrobial activity for zeolite A yet zinc-ion–exchanged zeolite A showed inhibition zones around the samples for both the microorganisms.

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