STUDY OF RARE EARTH ELEMENTS ENRICHMENT IN ACID MINE DRAINAGE AND THE KINETIC COLOMN LABORATORY SCALE (CASE STUDY PT. ARUTMIN INDONESIA SITE ASAM ASAM)
Acid Mine Drainage (AMD) is one of the crucial impacts of coal mining activities. This issue is becoming increasingly important because acid mine drainage will become a burden in the post-mining period if not appropriately managed. AMD can leach side materials, causing an increase in dissolved he...
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| Format: | Theses |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/54390 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Acid Mine Drainage (AMD) is one of the crucial impacts of coal mining activities. This
issue is becoming increasingly important because acid mine drainage will become a
burden in the post-mining period if not appropriately managed. AMD can leach side
materials, causing an increase in dissolved heavy metals, including Rare Earth Elements.
REE is an essential raw material for applying modern technology whose demand is
increasing globally from year to year. The combination of scarce supply and high demand
has encouraged various studies to evaluate alternative REE resources. The objective of
this study to determine the amount, characteristics and enrichment mechanisms of REE
in AMD, moreover this research is a preliminary study on the alternatives of REE
resources.
AAT at PT. Arutmin Indonesia has a unique characteristic, where there is a natural acid
flow. The samples used in this study consisted of mine water samples and rock samples.
Physical tests, IC and ICP-MS tests have been carried out on water samples, while the
REE concentration of rock samples has not been obtained. There are 10 samples of mine
water, having a low pH of 2.90 - 5.2. The concentration of Total REE (excluding Lu and
Tb) from 10 samples of mine water ranged from 12.28 ?g/L - 633.90 ?g/L with an average
total REE of 215,67 ?g/L. The North American Shale Composite (NASC) normalized REE
concentration graph shows the MREE enrichment pattern.
The kinetic test with the acrylic leach column was carried out to see the relationship
between the acidity of the PAF rock and the REE concentration in AAT. The kinetic test
scheme was carried out with PAF+NAF and PAF+Coal coatings to determine whether
the acidity of the PAF could leach REE in the layer underneath. At the end of the cycle it
is known that the REE concentration of the PAF+NAF sample is higher than the PAF
sample itself. In this study, it was known that the SO4
2- had the strongest correlation with
the REE concentration in AMD.. |
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