Document Type
Article
Publication Date
12-2023
Keywords
Adsorption; Phenol; Isotherm; Kinetic; Rubber seed shell
Abstract
This work encompasses using acid-base modified rubber seed shell biochar (RSSB) as an adsorption approach to eradicate phenol from aqueous mediums. Potassium hydroxide (KOH) was used pre-pyrolysis to modify the RSS, and hydrochloric acid (HCl) was used post-pyrolysis to modify the RSSB. The methodology was divided into three stages: RSS pretreatment, RSS base-modification and pyrolysis, and RSSB acid-modification and processing. Temperature, pH and several other factors were investigated for their impacts on the adsorbent, and optimal conditions were established at pH 6, 1.0 g of rubber seed shell biochar (RSSB), 50 mg/L initial concentration, 120 min contact time, and 30°C temperature. The highest phenol removal efficiency was recorded at 97.21 % using the RSSB-700 adsorbent. Thermodynamic, kinetic and isotherm studies were carried out on the adsorbents using the non-linear modelling approach. The pseudo-second-order kinetic model was declared optimal because the adsorption rate closely followed it, with minimal difference between the experimental and computed values. The maximum RSSB adsorption capacity is 13.32 mg/g, according to the equilibrium results, which follow the Langmuir isotherm equation. Thus, the aim of this research and all documented objectives have been fulfilled.
Citation
Obanla, O. R., Hestekin, J. A., Ojewumi, M. E., Bousrih, I., & Fawole, M. C. (2023). Enhancing Rubber (Hevea brasiliensis) Seed Shell Biochar Through Acid-Base Modification for Effective Phenol Removal from Aqueous Environments. Results in Engineering, 20, 101584. https://doi.org/10.1016/j.rineng.2023.101584
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
