EVALUATION OF THE IRON ION ADSORPTION CAPACITY OF ORGANOBENTONITES: EFFICIENCY OF THE LANGMUIR MODEL AND COMPARATIVE ANALYSIS OF ISOTHERM MODELS
This study examines the adsorption isotherms of Fe²⁺ ions from wastewater using newly modified adsorbents. Adsorption characteristics were analyzed based on Freundlich, Langmuir, Dubinin-Radishkovich, and Temkin isotherm models. It was found that bentonites modified with trimethylammonium (TMAB) and triethylammonium (TEAB) exhibit high efficiency in adsorbing iron ions from municipal wastewater. The adsorption capacity of the synthesized adsorbents was determined as follows: PBG bentonite - 0.151 mg/g; TMAB - 0.164 mg/g; TEAB - 0.168 mg/g. The adsorption isotherm data were found to align well with the Langmuir model, indicating monolayer adsorption behavior.
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