Comparative Study on Magnetic Activated Carbon Derived from Delignified and Non-Delignified Palm Kernel Shell: Synthesis, Characterization, and Methylene Blue Adsorption Analysis. J. Eng. Technol. Sci. 2025, 57 (4), 559-572. https://doi.org/10.5614/j.eng.technol.sci.2025.57.4.10.