Optimization of Hydrothermal Carbonization Time of Dimocarpus longan Peel: Adsorption Selectivity and Regeneration Performance for Dyes
DOI:
https://doi.org/10.26554/ijmr.20253150Keywords:
Hydrothermal Carbonization, Dimocarpus longan Peel, Adsorption Selectivity, Regeneration, DyesAbstract
This study investigates the hydrothermal carbonization (HTC) process of Dimocarpus longan peel for the development of a selective and regenerable adsorbent for cationic dye removal. The hydrochar was synthesized at 190°C with varying carbonization durations (4–12 hours) and characterized using XRD and FTIR analysis. XRD analysis revealed the formation of an amorphous carbon phase, particularly at longer HTC durations, with the most optimized structure observed at 10 hours. FTIR spectra confirmed that hydrothermal carbonization preserved the primary functional groups while modifying their intensity. Adsorption experiments using a binary dye system (malachite green-MG and rhodamine B-RhB) demonstrated that the hydrochar exhibited higher selectivity for MG, achieving a removal efficiency of 81.78%, compared to 41.88% for RhB. Desorption studies indicated that ethanol and acetone were the most effective desorbing agents, with desorption efficiencies of 18.99% and 18.14%, respectively, while water and acidic conditions showed minimal dye release. Regeneration tests revealed a gradual decline in adsorption capacity over three cycles, with removal efficiencies decreasing from 73.23% to 42.17%, indicating partial loss of adsorption sites and possible structural degradation. These findings suggest that Dimocarpus longan peel-derived hydrochar, particularly at 10-hour HTC processing, is a promising adsorbent for selective cationic dye removal. However, further optimization of regeneration techniques is necessary to improve its reusability and long-term performance.
References
Abd Al-khuder, Z. H. and F. Faiq (2025). Synthesis and Characterization of a Quaternary Composite Based on RGO/MWCNTs/Choline Chloride + Malonic Acid for Methyl Orange Dye Adsorption. Results in Chemistry; 102133
Amri, A., S. Wibiyan, A. Wijaya, N. Ahmad, R. Mohadi, and A. Lesbani (2024). Efficient Adsorption of Methylene Blue Dye Using Ni/Al Layered Double Hydroxide-Graphene Oxide Composite. Bulletin of Chemical Reaction Engineering & Catalysis, 19(2); 181–189
Anggraini, G. K., A. Novitasari, and A. Amri (2024). Ca-Al Layered Double Hydroxides Pillared H4[a-PW12O40]•nH2O as Adsorbent Material for Cadmium (II) Removal from Aqueous Solution. Indonesian Journal of Material Research, 2(2); 56–60
Duan, Y., J. Zhao, X. Qiu, X. Deng, X. Ren, W. Ge, and H. Yuan (2022). Coagulation Performance and Floc Properties for Synchronous Removal of Reactive Dye and Polyethylene Terephthalate Microplastics. Process Safety and Environmental Protection, 165; 66–76
Gabriel, J., C. Eduardo, W. Martins, V. Roberto, M. Heloísa, and N. Olsen (2023). Production of Hydrochars from Pinus caribaea for Biosorption of Methylene Blue and Tartrazine Yellow Dyes. Cleaner Chemical Engineering, 5; 100092
Haris, M., M. W. Khan, J. Paz-Ferreiro, N. Mahmood, and N. Eshtiaghi (2022). Synthesis of Functional Hydrochar from Olive Waste for Simultaneous Removal of Azo and Non-Azo Dyes from Water. Chemical Engineering Journal Advances, 9; 100233
Hasanah, M., N. Normah, A. Wijaya, F. S. Arsad, R. Mohadi, and A. Lesbani (2022a). High Selectivity and Adsorption Capacity for Congo Red Toward Anionic Dyes by Adsorbent: Modified LDH with Hydrochar Made from Nephelium lappaceum Peel. Global Nest Journal, 24(3); 487–494
Hasanah, M., A. Wijaya, F. S. Arsyad, R. Mohadi, and A. Lesbani (2022b). Preparation of Hydrochar from Salacca zalacca Peels by Hydrothermal Carbonization: Study of Adsorption on Congo Red Dyes and Regeneration Ability. Science and Technology Indonesia, 7(3); 372–378
Hien Tran, T., A. H. Le, T. H. Pham, L. D. Duong, X. C. Nguyen, A. K. Nadda, S. W. Chang, W. J. Chung, D. D. Nguyen, and D. T. Nguyen (2022). A Sustainable, Low-Cost Carbonaceous Hydrochar Adsorbent for Methylene Blue Adsorption Derived from Corncobs. Environmental Research, 212; 113178
Juleanti, N., P. Mega, S. Bahar, N. Siregar, and E. S. Fitri (2024). Carbon-Based Adsorbents from Biochar and Microcrystalline Cellulose for Phenol Removal in Aqueous Solutions. Indonesian Journal of Material Research, 2(3); 86–92
Jung, S., M. Jung, J. Yoon, J. Kim, H. Jin, and H. Won (2024). Chitosan-Derived Activated Carbon / Chitosan Composite Beads for Adsorptive Removal of Methylene Blue and Acid Orange 7 Dyes. Reactive and Functional Polymers, 204; 106028
Khanzada, A. K., H. E. Al-Hazmi, T. A. Kurniawan, J. Majtacz, G. Piechota, G. Kumar, P. Ezzati, M. R. Saeb, N. Rabiee, H. Karimi-Maleh, E. C. Lima, and J. Mąkinia (2024). Hydrochar as a Bio-Based Adsorbent for Heavy Metals Removal: A Review of Production Processes, Adsorption Mechanisms, Kinetic Models, Regeneration and Reusability. Science of the Total Environment, 945; 173972
Lawa, Y., F. L. Benu, K. Boimau, D. B. N. Riwu, P. Kune, A. Faria da Silva, B. A. Widyaningrum, H. Darmokoesoemoe, H. S. Kusuma, and Y. A. B. Neolaka (2024). Hydrochar Preparation from Wild Weeds (Amaranthus sp.) and Its Application as Artificial Soil for Hydroponic System. Kuwait Journal of Science, 51(4); 100277
Lesbani, A., N. Ahmad, S. Wibiyan, and A. Wijaya (2025). Improving Congo Red Dye Removal by Modification Layered Double Hydroxide with Microalgae and Macroalgae: Characterization and Parametric Optimization. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 706; 135770
Palapa, N. R., A. Amri, and Y. Hanifah (2023). Potential Indonesian Rice Husk for Wastewater Treatment Agricultural Waste Preparation and Dye Removal Application. Indonesian Journal of Environmental Management and Sustainability, 7(4); 160–165
Siregar, P. M. S. B. N., Normah, N. Juleanti, A. Wijaya, N. R. Palapa, R. Mohadi, and A. Lesbani (2021). Mg/Al-CH, Ni/Al-CH, and Zn/Al-CH as Adsorbents for Congo Red Removal in Aqueous Solution. Communications in Science and Technology, 6(2); 74–79
Wen, C., Y. Huang, W. Zhang, J. Tian, C. Dong, C. Yang, and W. Liang (2025). Efficient and Convenient Purification Strategy Using Maltodextrin-Based Nanosponges for Rapid Removal of Cationic Dyes. Separation and Purification Technology, 362(P2)
Xu, H., M. G. Koutchouo, K. Ding, C. Kositanont, C. Dokkhan, T. N. Lampang, C. Thanachayanont, X. Hu, C. Xu, and S. Zhang (2025). Hydrothermal Carbonization of Cola Nut Shell: Impact of Deep Eutectic Pretreatment on the Property of Hydrochar. Industrial Crops & Products, 227; 120792
Xu, S., G. Bi, J. Zou, H. Li, M. Chen, Z. Tang, Q. Yu, J. Xie, and Y. Chen (2024). Effect of Hydrochar from Biogas Slurry Co-Hydrothermal Carbonization with Biomass on Anaerobic Digestion Performance of Food Waste. Industrial Crops & Products, 221; 119361
Zulfajri, M., Y. T. Kao, and G. G. Huang (2021). Retrieve of Residual Waste of Carbon Dots Derived from Straw Mushroom as a Hydrochar for the Removal of Organic Dyes from Aqueous Solutions. Sustainable Chemistry and Pharmacy, 22; 100469
