TY - JOUR T1 - A Product Diffusion Model for the Extraction of Cerium and Yttrium from Magnetic Coal Fly Ash Using Citric Acid Solution AU - Agus Prasetya,Pramesti Prihutami,Wahyudi Budi Sediawan,Himawan Tri Bayu Murti Petrus JO - International Journal of Technology VL - 13 IS - 4 SP - 291 EP - 319 PY - 2022 DA - 2022/10/07 SN - 2087-2100 DO - https://doi.org/10.14716/ijtech.v13i4.4826 UR - https://ijtech.eng.ui.ac.id/article/view/4826