Roslan, F. A. S., Yub Harun, N., Saeed, A. A. H., Ramli, R. M., Mannikam, S. D., & Hussein Al-Qadami, E. H. (2022). Methylene Blue Removal Using Palm Oil Mill Effluent Sludge-derived Adsorbent. Chemical Engineering Transactions, 91, 589-594. https://doi.org/10.3303/CET2291099