Wicakso, D. R., Mirwan, A., Agustin, E., Nopembriani, N. F., Firdaus, I., & Fadillah, M. (2022). Potential of silica from water treatment sludge modified with chitosan for Pb(II) and color adsorption in sasirangan waste solution. Communications in Science and Technology, 7(2), 188-193. https://doi.org/10.21924/cst.7.2.2022.1041