Anisuzzaman, S. M. ., N. Sinring, and R. Fran Mansa. “Properties Tuning of Palm Kernel Shell Biochar Granular Activated Carbon Using Response Surface Methodology for Removal of Methylene Blue”. Journal of Applied Science &Amp; Process Engineering, vol. 8, no. 2, Oct. 2021, pp. 1002-19, doi:10.33736/jaspe.3961.2021.