Uddin, M. J., M. M. R. Khan, M. S. Iftekhar, and M. A. Islam. “Cr(VI) Removal from Wastewater by Using Rice Husk Ash (RHA)”. ASEAN Journal of Chemical Engineering 6, no. 1 (December 31, 2006): 53-57. Accessed November 23, 2024. https://dev.journal.ugm.ac.id/v3/AJChE/article/view/7659.