Mohamad, Sharifah, Nor Kartini Abu Bakar, Ahmad Razali Ishak, Hemavathy Surikumaran, Kavirajaa Pandian, Muggundha Raoov, Nur Nadhirah Mohamad Zain, and Kumuthini Chandrasekaram. 2014. “Removal of Phosphate by Paper Mill Sludge: Adsorption Isotherm and Kinetic Study”. Asian Journal of Chemistry 26 (12):3545-52. https://doi.org/10.14233/ajchem.2014.16227.