Abstract—This study aimed to assess the effectiveness of activated carbon (AC) in removing methomyl from water. Batch and fixed-bed column experiments were conducted to investigate the potential of AC for methomyl adsorption and to identify the optimal conditions for its application in water treatment. The batch experiments determined that activated carbon could adsorb methomyl at a rate of 32.70 mg/g after 300 m of contact. The highest adsorption capacity of 35.35 mg/g was observed at pH 2. Further agitation speed experiments revealed that turbulence is critical in controlling the solid–liquid mass transfer mechanism. The result from the pseudo-first-order adsorption kinetic equation was consistent with the experimental data, and the Langmuir adsorption isotherm better described the methomyl adsorption of activated carbon. The fixed-bed column experiments showed that the adsorption efficiency was depleted after continuous use after 19 hours (1,140 m), corresponding to the adsorption equilibrium point.

Keywords—activated carbon, adsorption, fixed-bed column, methomyl

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Cite: Apichon Watcharenwong, Anusara Kaeokan, Kankanit Wasuthitirat, Pariyaporn Seekhumlek, Lalita Kamolklang, Orraya Fakklang, and Salintip Hangsalad, "Activated Carbon in Methomyl Adsorption and Its Capabilities: Batch and Fixed-Bed Column Experiments," International Journal of Environmental Science and Development vol. 15, no. 1, pp. 51-56, 2024.

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