Inverse gas chromatographic characterization of halloysite-carbon composites as adsorbents for skin disinfectants from water solutions

The influence of physicochemical parameters of halloysite-carbon composites on the adsorption of skin disinfectants was investigated. The dispersive surface free energy and acid-base properties of halloysite-carbon composites were determined using inverse gas chromatography. The free adsorption ener...

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Bibliographic Details
Published in:Archives of environmental protection 2024-01, Vol.50 (3), p.36-42
Main Authors: Słomkiewicz, Piotr, Szczepanik, Beata, Frydel, Laura, Włodarczyk-Makuła, Maria
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Antiseptics
Aqueous solutions
Carbon
Cellulose
Chloroxylenol
Composite materials
Crystalline cellulose
Disinfectants
Energy
Free energy
Gas chromatography
Inverse gas chromatography
Nanotechnology
Nanotubes
Parameters
Physicochemical properties
Triclosan
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Summary:The influence of physicochemical parameters of halloysite-carbon composites on the adsorption of skin disinfectants was investigated. The dispersive surface free energy and acid-base properties of halloysite-carbon composites were determined using inverse gas chromatography. The free adsorption energy was higher for all halloysite-carbon composites compared to the unmodified halloysite, which acted as a less electron-donating adsorbent. In contrast, the composite obtained using halloysite nanotubes (HNT) and ground microcrystalline cellulose as the carbon precursor exhibited the highest free adsorption energy and the Kb/Ka ratio. These results suggest that the free adsorption energy can be an additional factor influencing the adsorption process. We demonstrated that the composite with the highest free adsorption energy is effective for removing triclosan, chloroxylenol and chlorophene from water. The acid-base properties of halloysite-carbon composites enhance the adsorption of these compounds due to their acidic character. The composite with the highest Kb/Ka ratio removes adsorbates from aqueous solutions with the greatest efficiency. Parameters such as free dispersion energy, electron-donating, or electron-accepting properties of the adsorbent help explain why these composites exhibit high adsorption capabilities.
ISSN:2083-4772
2083-4810
DOI:10.24425/aep.2024.151684