Influence of pH on the Sorption Capacity of Transcarpathian Bentonite from the Ilnytsky Deposit

Abstract:

The object of this study was bentonite clay from the Ilnytskyi deposit in the Transcarpathian region. The clay was enriched in montmorillonite by sedimentation to remove the coarse-dispersed phase. Complex thermal, X-ray diffractometric, and energy-dispersive spectral analyses showed that the enriched bentonite consists mainly of Ca, Mg-montmorillonite. The sorption of methylene blue dye by the enriched bentonite was found to occur through an ion-exchange mechanism. Modeling of the experimental sorption isotherm data using the Langmuir equation revealed the influence of medium pH on the sorption characteristics of bentonite. The spent sorbent is recommended for application in sorption technologies for landfill reclamation and land restoration.

• Periodical: Advances in Science and Technology (Volume 174)
• Pages: 3-14
• DOI: https://doi.org/10.4028/p-m6XkPH
• Online since: April 2026
• Authors: Viktoria Kochubei*, Yaroslava Yaremchuk, Svitlana Yaholnyk, Myroslav Malovanyy
• Keywords: Bentonite Clays, Montmorillonite, Physicochemical Analysis, Sorption Isotherms

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