POTENTIALLY ACID MINE DRINAGE FORMING ON ROCK USING XRD AND MICROSCOPY ANALYSIS ON COAL MINING, EAST BLOCK, SITE BONTANG, PT. INDOMINCO MANDIRI, EAST KALIMANTAN PROVINCE
1 Amran, 2Dadang Ahmad Suriamiharja, 3Nursiah La Nafie, 4 Sri Widodo, 5Mahatma Lanuru, 6 Eymal Bahsar Demmalino

1
Teknologi Linkungan, Pengelolaan Lingkungan Hidup, Universitas Hasanuddin Makassar
(email: amran_sibali2002[at]yahoo.com)
2Departemen Geofisika, Fakultas MIPA, Universitas Hasanuddin
(email: dahmad[at]unhas.a. c.id)
3Departemen Kimia, Fakultas MIPA, Hasanuddin
(email: nursiahlanafie[at]unhas.ac.id)
4Departemen Teknik Pertambangan Fakultas Teknik, Universitas Hasanuddin
(email:srwd007[at]yahoo.com )
5Departemen Ilmu Perikanan dan Kelautan, Fakultas MIPA, Universitas Hasanuddin
(email: Mahat70[at]gmail.com)
6Departemen Sosial Ekonomi Pertanian, Fakultas Pertanian, Universitas Hasanuddin
(email:demmalino1964[at]yahoo.com)

Abstract

One of the direct impacts of mining activities is the formation of acid mine drainage which is characterized by a decrease in pH and the high solubility of heavy metals, to anticipate the formation of mine acid water in a mine, it is necessary to test the rock or material in a mine. The purpose of this research is to find out rocks or materials that have the potential to cause acid mine drainage. The method used in analyzing the potential of acid mine drainage in this study is XRD test analysis and microscopy. Mineralogical testing using the XRD method and microscopy was carried out to identify the main minerals forming acid mine drainage. XRD and microscopy results showed that sample 01 contained silica oxide and alumino-silicate in the form of quartz minerals and clay minerals as main components, quartz mineral SiO2 = 56.3%, Muscovit 24.6%, elemental kaolinite 15.3% and pryrite = 3.8% as important element in the formation of acid mine drainage. XRD testing also showed that sample 05 contained silica oxide and aluminosilicate in the form of quartz minerals and clay minerals as the main components, with the percentage of quartz mineral SiO2 = 40.9%, Muscovit 30.0%, kaolinite element 25.9% and pryrite = 3.8% as an important element in the formation of acid mine drainage. Mineralogical analysis showed that drill core samples contained pyrite minerals as the main component in forming acid mine drainage. In addition to the mineral pyrite there are also clay minerals (clay), silica oxide and quartz minerals. Microscopic analysis of polish cuts also clearly shows the presence of pyrite, clay, quartz minerals

Keywords: Acid mine drainage, Acidic mine water, XRD Test, Microscopic

Topic: Renewable Energy