Sugarcane bagasse-derived granular activated carbon hybridized with ash in bio-based alginate/gelatin polymer matrix for methylene blue adsorption.

Sutthira Sutthasupa, Wanida Koo-Amornpattana, Nakorn Worasuwannarak, Pensiri Prachakittikul, Preut Teachawachirasiri, Woramet Wanthong, Thiti Thungthong, Pimonpan Inthapat, Wilasinee Chanamarn, Chalongrat Thawonbundit, Atthapon Srifa, Sakhon Ratchahat, Weerawut Chaiwat

Journal: International journal of biological macromolecules 2023;253(Pt 7):127464

PMID: 37852399

Full Text on Elsevier Science View on PubMed

Abstract

Sugarcane bagasse (SCB) and sugarcane bagasse ash (SCB-ash) are major agricultural residues from sugar processing industries in Thailand. In this study, SCB-derived activated carbon (SCBAC) with the optimum surface area of 489 m/g was prepared by steam activation at 900 °C for 1 h. Hybrid granular activated carbons (GACs) were successfully developed by mixing SCBAC with bio-based polymers, alginate and gelatin, at the weight ratio of 3:1 for methylene blue (MB) adsorption. SCB-ash, which was additionally mixed in the GACs, could significantly increase compressive strength of the GACs, but decrease their surface areas and MB adsorption efficiencies. An existence of gelatin up to 30 wt% in the polymer matrix of the GACs showed a slight increase in swelling degree and iodine number, but could not enhance bead strength and MB adsorption efficiency due to its relatively lower bulk density and specific surface area. Maximum MB adsorption capacities of the GACs were found at 290-403 mg/g under this study's experimental condition. MB adsorption efficiencies at above 90 % with no deformation of all of the selected SCB hybrid GACs were finally confirmed after seven consecutive adsorption-desorption cycles using a simple regeneration with ethanol.

Address: Division of Packaging Technology, Faculty of Agro Industry, Chiang Mai University, Chiang Mai 50100, Thailand.; Department of Chemical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom 73170, Thailand.; The Joint Graduate School of Energy and Environment, King Mongkut's University of Technology Thonburi, Bangkok 10140, Thailand.; Division of Environmental Engineering and Disaster Management, Mahidol University, Kanchanaburi Campus, Kanchanaburi 71150, Thailand.; Department of Chemical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom 73170, Thailand. Electronic address: [email protected].

DOI: 10.1016/j.ijbiomac.2023.127464