STUDY OF WATER FLOW AND OXYGEN CONCENTRATION ON POTENCIAL ACID FORMING MATERIAL USING COLUMN TEST WITH LABORATORY SCALE RELATED TO ACID MINE WATER FORMATION

• Main Author: Jarwinda
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/47290
• Institution: Institut Teknologi Bandung

Mining activities have significant positive and negative environmental impacts. Acid mine drainage (AMD) is water from mining or quarrying areas that have a low pH (pH <4.50) with high acidity, formed as a result of oxidation of sulfide minerals by oxygen accompanied by water. The main factor influencing the entry of water and oxygen into the pile is the flow of water that enters the overburden pile. The behavior of water flow in the saturated zones will reduce the amount of oxygen entering the overburden pile so that the amount of oxygen entering that pile is very small or almost no oxygen enters the saturated zones. This research was conducted with several tests, namely sample size distribution test, static test, XRD test, XRF test, and column test. Column test was carried out to determine the value of moisture content, the value of oxygen concentration using sensors at a depth of 15 cm, 30 cm, 45 cm and 60 cm, and to determine the physical properties of leachate water that came out of the column. Geochemical tests were carried out to determine the potential for the formation of AMD and the potential for neutralizing the acid from overburden rock samples. The analysis includes the grain size distribution that has an effect when watering and analysis of physical and numerical models that describe the behavior of water and oxygen flow in the overburden sample columns. The greater the volumetric water content value, the smaller the oxygen coefficient value in the columns. At the saturation point, value of volumetric water content is 0,366 cm3 / cm3, and oxygen value is 0,3%.