Mohamad Said, Khairul Anwar, et al. “ Methylene Blue Adsorption Mechanism onto Palm Kernel Shell-Derived Activated Carbon: From Particle Diffusion to Site Adsorption”. BioResources, vol. 18, no. 3, July 2023, pp. 5120-32, https://ojs.bioresources.com/index.php/BRJ/article/view/22476.