September 10, 2025Ingeniería e InvestigaciónOpen Access

Activation of Coal Fly Ash for Cadmium Wastewater Remediation

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This study demonstrates enhanced cadmium (Cd(II)) adsorption using activated coal fly ash, indicating its viability as a low-cost sorbent.

The activated coal fly ash effectively remediated cadmium in wastewater, achieving high adsorption rates at specific pH levels.
Maximum sorption capacity was observed at pH 6, highlighting the importance of pH control in the adsorption process.
Kinetics of the adsorption were modeled, with the Elovich isotherm best fitting the data for cadmium uptake across treated materials.
Ultrasonic activation in an alkaline medium significantly improved cadmium adsorption over multiple cycling tests.

Medina et al. (2025) studied this question.

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This study demonstrates enhanced cadmium (Cd(II)) adsorption using activated coal fly ash, indicating its viability as a low-cost sorbent.