James William Ariend and Ismail Marzuki 2026. Analysis of the Role of Iron (Fe) Content on Nickel Distribution in Limonite and Saprolite Zones Using Energy Dispersive X-Ray Fluorescence (ED-XRF). Journal of Green Chemical and Environmental Engineering. 2, 2 (Jul. 2026), 94–106. DOI:https://doi.org/10.63288/jgcee.v2i2.26.