2025. Comparative Study on Magnetic Activated Carbon Derived from Delignified and Non-delignified Palm Kernel Shell: Synthesis, Characterization, and Methylene Blue Adsorption Analysis. Journal of Engineering and Technological Sciences. 57, 4 (Aug. 2025), 559–572. DOI:https://doi.org/10.5614/j.eng.technol.sci.2025.57.4.10.