Characterization and Surface Study of Volcanic Ashes from Popocatepetl.

ABSTRACT: Puebla City, Mexico, experienced several volcanic ash storms that polluted the city and its surroundings. The spectroscopic characterization of the volcanic ashes is reported in more detail herein using IR, ESR, SEM, and powder diffraction X-ray. We report for the first time the use of volcanic ashes from Popocatépetl, a natural material, functioning as an adsorbent for removal of the cationic dye methylene blue from aqueous media. Batch adsorption experiments were conducted under varying initial dye concentrations and contact times to describe the adsorption behavior of the ashes, was obtained a SSA = 0.7245 m²/g. The equilibrium data were fitted to the Langmuir and Freundlich isotherm models. The Langmuir model exhibited a strong correlation (R ² = 0.99351) t

SUBMITTER: Lazcano-Gonzalez N 

PROVIDER: S-EPMC12917834 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature