ADSORPTIVE REMOVAL OF METHYLENE BLUE AND ACID ORANGE 7 BY HEXADECYLTRIMETHYLAMMONIUM BROMIDE MODIFIED RICE HUSK. JT [Internet]. 2016 Mar. 9 [cited 2024 Jul. 23];78(3-2). Available from: https://journals.utm.my/jurnalteknologi/article/view/7824