Biocompatible polypyrrole/zeolite composite for chromate removal and detoxification

•PPy/Ze nanocomposite was synthesized by polymerization process.•The nanocomposite removed 83.5% of Cr(VI) within 50 min.•The nanocomposite is non-cytotoxic and does not retard bacterial growth. This study assessed the Cr(VI) removal efficiency, detoxification, and biocompatibility of polypyrrole/ze...

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Bibliographic Details
Published in:Materials letters 2022-02, Vol.308, p.131290, Article 131290
Main Authors: Senguttuvan, S., Janaki, V., Senthilkumar, P., Kamala-Kannan, S.
Format: Article
Language:English
Subjects:
Antiinfectives and antibacterials
Biocompatibility
Chromates
Cr(VI)
Electron microscopes
Fourier transforms
Infrared spectra
Listeria
Materials science
Nanocomposite
Nanocomposites
Polypyrroles
Pyrrole
Reduction
Salmonella
Toxicity
X ray spectra
Zeolite
Zeolites
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Summary:•PPy/Ze nanocomposite was synthesized by polymerization process.•The nanocomposite removed 83.5% of Cr(VI) within 50 min.•The nanocomposite is non-cytotoxic and does not retard bacterial growth. This study assessed the Cr(VI) removal efficiency, detoxification, and biocompatibility of polypyrrole/zeolite (PPy/Ze) nanocomposite. The composite was prepared by oxidative polymerization of pyrrole with zeolite. Structural study through scanning electron microscope showed that PPy/Ze nanocomposite was circular in shape with size ranging from 30 to 80 nm. The Fourier transform infrared spectra peaks of the composite confirm the presence of zeolite and polypyrrole in the composite. The composite removed 83.5% of Cr(VI) within 50 min and consequently detoxified Cr(VI) through reduction process. Energy dispersive X-ray spectrum supports the adsorption of Cr(VI) onto the composite and X-ray diffraction spectra corresponding to Cr2O3 attest Cr(VI) reduction. Cytotoxicity and antimicrobial assay confirmed that the composite was non-toxic and do not retard Listeria monocytogenes and Salmonella typhimurium growth. These results confirm that PPy/Ze composite is an useful and eco-friendly material for Cr(VI) removal and reduction from wastewaters.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2021.131290