Brahim Arhoun, Maria del Mar Cerrillo-Gonzalez, Maria Villen-Guzman, Juan Manuel Paz-Garcia, Jose Miguel Rodriguez-Maroto
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Abstract
An innovative approach to the treatment of textile wastewater by utilizing fine fractions of construction and demolition waste (CDW) as a cost-effective adsorbent is presented in this work. Through batch experiments, the impact of key parameters on the adsorption process was explored, identifying optimal conditions: natural pH, adsorbent dosage (S/L) of 20 g L−1, and temperature of 20 °C. The characterization of CDW was performed using ICP, BET, FTIR, SEM–EDX, XPS, and XRD. The kinetics of adsorption were effectively described by the Elovich model, while equilibrium adsorption data showed good agreement with the Freundlich model. The maximum monolayer adsorption capacity for acid blue AB113 dye on CDW obtained from Langmuir isotherm was 89.52 mg g–1. Thermodynamic analysis indicated an exothermic and feasible nature of the adsorption process. The results of this study highlight the potential use of fine CDW as a promising adsorbent to remove acid blue113 dye from textile wastewater.
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