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Investigation of adsorption of p-cresol on coconut shell-derived activated carboncoconutactivatedcarbon.com

Mitigation of odorous volatile organic compounds, such as p-cresol from wastewater needs simple and practical technologies such as adsorption. In this research, an NaOH-activated carbon was prepared from coconut shell (CSAC-SH). Characterization of CSAC-SH suggested that the adsorbent possessed a well-developed microporous/mesoporous structure. To evaluate the performance of CSAC-SH, a series of batch experiments were conducted to investigate the effects of contact time (0–24 h), initial concentration (50–1000 mg L−1) and adsorbent dosage (1–20 mg L−1) on adsorption of p-cresol. The equilibrium data were found to conform to Redlich–Peterson, Fritz–Schluender, and Langmuir isotherms. The maximum monolayer adsorption capacity of 256.9 mg g−1 (298 K) suggested that the prepared adsorbent has a high affinity toward p-cresol. A second-order kinetic model best described the experimental data and adsorption was governed by intraparticle diffusion.granular activated carbon coconut shell The thermodynamic analysis suggested that the adsorption was feasible, spontaneous, and exothermic (298–328 K). Furthermore, a desorption study suggested that chemisorption was dominant in the adsorption process. Results indicate that sodium hydroxide-activated carbon is effective in mitigating p-cresol from wastewater.

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