Application of Magnetic Coconut Shell-derived Biocarbon for Methylene Blue Removal

Abstract

This study presents the preparation of magnetic biocarbon from coconut shell. The physicochemical properties of the prepared biocarbon was initially characterized by their iodine adsorptive capacity to estimate structure porosity and surface area. The comparative study was conducted between coconut shell-derived biocarbon (CSB), coconut shell-derived activated biocarbon (CSAB), and magnetic coconut shell-derived biocarbon (MCSB) to evaluate their adsorption efficiency towards methylene blue (MB) dyes in aqueous solution. The iodine number for CSAB showed greater difference compared to the CSB and MCSB. Meanwhile, the adsorption studies indicated that MCSB had higher adsorption value (68.83 mg/g) for methylene blue dye than the other biosorbents. This was due to abundant of Fe3O4 species and oxygen containing functional groups after the biocarbon was modified. The data of MB adsorption by MCSB reflected better adsorption efficiency overall. Hence, magnetization is suggested as a better option for biocarbon modification.

Methylene Blue Adsorption Kinetics Investigation by Coconut Shell Activated Carbon Adsorbent Using Fractional Power, Avrami and Bangham Models

“…Thus, variants of the coconut parts or its derivative have also been applied in several sorption processes involving CS. As such variants or derivative, one has shell [25], charcoal [26]- [27], choir [28]- [31], fiber (Al-Aoh et al, 2016; Zhang et al, 2018), AC [34]- [35], dreg [36], leaves [37]- [39], tree bark [40], spent grated coconut [41], coating/modifications [42]- [45], hydrochar [46], biochar [47] and additives [48]- [49]. In addition, the removal of other dye types from water had been examined using CS [50], [51].…”