Muhammad Zulfajri, Muhammad Adlim, Nurlena Andalia, Akhtar Rasool, Sri Sudewi, Genin Gary Huang
This study developed a sustainable hydrochar (HC) adsorbent from pineapple crown waste (PCW), an agricultural byproduct, through co-hydrothermal carbonization (co-HTC) with magnesium acetate (MgAc) to investigate its dye adsorption capacity. Incorporating MgAc during carbonization modified the HC's structure, increasing oxygen-functional groups for better adsorption properties. Structural and functional analyses using SEM, FTIR, UV–Vis, TGA, DTA, XPS, XRD, BET, and CHN analyzer confirmed that the modified HC exhibited excellent affinity for methylene blue (MB) dye among other azo dyes, attributed to electrostatic attraction, π–π interactions, hydrogen bonding, and pore filling/intra-particle diffusion between active sites of MB and hydrochar's carbon backbone and functional groups. These findings highlight co-HTC with MgAc as a green, economical process for converting waste into a practical, eco-friendly material for dye removal, supporting waste valorization and environmental remediation efforts. © 2024
Department of Chemistry Education, Universitas Serambi Mekkah, Aceh, Banda Aceh, 23245, Indonesia; of Mathematics and Applied Science, Universitas Syiah Kuala, Aceh, Banda Aceh, 23111, Indonesia; Chemistry Department, FKIP, Universitas Syiah Kuala, Aceh, Banda Aceh, 23111, Indonesia; Department of Biology Education, Universitas Serambi Mekkah, Aceh, Banda Aceh, 23245, Indonesia; Research Center for Chemistry — National Research and Innovation Agency (BRIN), KST BJ Habibie, Setu, Tangerang Selatan, 15314, Indonesia; Department of Biotechnology, Manav Rachna International Institute of Research and Studies, Surajkund, Haryana, 121004, India; Department of Pharmacy, Faculty of Mathematics and Natural Science, Universitas Sam Ratulangi, Manado, 95115, Indonesia; Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan
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