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): 94-106. https://doi.org/10.63288/jgcee.v2i2.26.