Delonix regia biochar potential in removing phenol from industrial wastewater. (September 2022)

• Record Type: Journal Article
• Authors: Emenike, Ebuka Chizitere; Ogunniyi, Samuel; Ighalo, Joshua O.; Iwuozor, Kingsley O.; Okoro, Hussein K.; Adeniyi, Adewale George
• Is Part Of: Bioresource technology reports. Volume 19(2022)
• Publication Date: 2022-09
• Subjects: Delonix regia -- Biochar -- Adsorption -- Phenol -- Wastewater -- Biomass waste; Biomass energy -- Periodicals; Biotransformation (Metabolism) -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Waste products as fuel -- Periodicals; Waste products as fuel; Organic wastes; Factory and trade waste; Biotransformation (Metabolism); Biomass energy; Agricultural wastes; Periodicals; Electronic journals; 662.88
• DOI: 10.1016/j.biteb.2022.101195
• Languages: English
• ISSNs: 2589-014X

Abstract

Abstract: This study investigated the ability of biochar from the agricultural waste, Delonix regia pod, to adsorb phenol from an aqueous solution. The biochar was obtained by the carbonization method at a peak temperature of 375 °C. The effects of contact time, temperature, and initial phenol concentration were examined in batch adsorption studies. At optimal adsorption conditions of 60 °C and 60 min contact time, removal efficiency of up to 82.3% was achieved. The adsorption results fit well with PSO kinetic and Freundlich isotherm models, with a maximum adsorption strength of 2.59 mg/g. Thermodynamic studies reveal that the process was non-spontaneous, endothermic, and irreversible. The system of adsorption was verified with the intraparticle model. This study demonstrated the effectiveness of Delonix regia biochar as an adsorbent in a fully packed bed for phenol removal, thus aiding the transformation of solid agro-wastes in industrial wastewater treatment. Graphical abstract: Unlabelled Image Highlights: The removal of phenol from wastewater using Delonix regia pod biochar was studied. The Freundlich isotherm and the PSO kinetics fit the adsorption data well. Adsorption mechanism was controlled by both chemisorptions and physisorption. Thermodynamic study showed a non-spontaneous and endothermic processes.