#TITLE_ALTERNATIVE#

• Main Author: RACHMAN (NIM 12103002), SYAIFUL
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/24448
• Institution: Institut Teknologi Bandung

Nickel laterite deposit is a weathering product of ultramafic rock, which contains Ni-Silikat. Generally, it exists in area with tropical to subtropical climate. Tropical climate in Indonesia causes intensive weathering <br /> <br /> process, which leads the formation of thick laterite profile in several area in Indonesia. This makes Indonesia as one of major nickel producer. Enrichment process at nickel laterite deposit is controlled by some factor there are: bedrock, climate, topography, groundwater, mineral stability, element mobility, and environmental condition, which have an effect to mineral solubility.<p> <br /> <br /> The research focused on study of nickel laterite deposit characteristic in area of Pomala and the changing of metal concentration of Fe, Ni, and Cr at nickel laterite deposit, which caused by leaching as effect of groundwater flow.<p> <br /> <br /> Research methods used are sampling, laterite profile modelling, petograpic analysis, laterite chemical analisys and water chemical and physical analisys from the model laterite profile. The leaching process in nickel laterite deposit can be observed from the changing of water physical and chemical characteristics such as acidity, redox potential, and Total Dissolved Solid, as well as mineralogical analysis of nickel laterite deposit with XRD. The result can be used to study the characteristic of nickel laterite deposit and enrichment process especially the influence of unconfined groundwater flow.<p> <br /> <br /> From the research can be concluded that leaching causes change of physical and chemistry parameter such as TDS and concentration of Fe, Ni, and Cr. However, there is no forming of new mineral during 7-week observation.