A thermochemical treatment of food waste: Preparing activated carbon for optimized removal of methyl violet dye via the Box-Behnken design method

• Published in: BIOMASS CONVERSION AND BIOREFINERY
• Main Authors: Awang, Hazierul F.; Abdulhameed, Ahmed Saud; Jawad, Ali H.; Alothman, Zeid A.; Wilson, Lee D.
• Format: Article; Early Access
• Language: English
• Published: SPRINGER HEIDELBERG 2023
• Subjects: Energy & Fuels; Engineering
• Online Access: https://www-webofscience-com.uitm.idm.oclc.org/wos/woscc/full-record/WOS:001163768100001

Herein, food wastes such as waste rice (WR) and chicken bones (CB) were used as environmentally friendly precursors to produce activated carbon (WRCBAC) by a pyrolysis induced H3PO4 activation method. The removal of an organic dye (methyl violet, MV) from aqueous solutions has been extensively studied using WRCBAC as an adsorbent. The adsorption characteristics, including A: WRCBAC dosage (0.02-0.1 g), B: pH (4-10), and C: duration (5-20 min), were evaluated using the well-known Box-Behnken statistical approach. The findings of the adsorption isotherms showed that the MV adsorption closely matches the Langmuir model, whereas kinetic data may be adequately characterized by the pseudo-second-order model. The adsorption capacity of WRCBAC was estimated as 88.4 mg/g. Electrostatic forces, pi-pi stacking, and H-bonding are the potential processes that might control MV adsorption by WRCBAC. This investigation reveals that WRCBAC formed from WR and CB can be employed as a viable adsorbent for wastewater treatment.