Chan, M. Y. ., Y. K. Lee, and S. P. Yeap. “PH-DEPENDENT ADSORPTION/DESORPTION OF DYE MOLECULES USING MAGNETICALLY SEPARABLE QUARTZ SAND”. Jurnal Teknologi, vol. 84, no. 3, Mar. 2022, pp. 1-8, doi:10.11113/jurnalteknologi.v84.17544.