Laboratory Scale Study of Acid Mine Treatment Using an Open Fly Ash Channel
Acid Mine Drainage (AMD) is an important environmental issues that often arise in the mining activities, whether for exploration phase or post mining. AMD processing needs to be done so pH value will increase and harmful metal content will be reduced before the water is released into free waters. Fl...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/24651 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Acid Mine Drainage (AMD) is an important environmental issues that often arise in the mining activities, whether for exploration phase or post mining. AMD processing needs to be done so pH value will increase and harmful metal content will be reduced before the water is released into free waters. Fly ash is a coal combustion product which is a limestone alternative to increase pH and remove metal from water. One of the AMD processing technology using fly ash is by Open Fly Ash Channel (OFAC). The parameter observed in the experiment is the effectiveness of fly ash against retention time. <br />
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Based on the research results, geochemical classification of fly ash is NAF and is classified as class C coal ash. The test using a 60 cm channel length gives a pH range of about 9,38 on the channel and 9,26 on the outlet; whereas the test using a 40 cm channel length gives a pH range of about 9,79 on the channel and 6,55 on the outlet. Tests using 40 cm channel length with 5 cycles also give a pH range of about 10,89 on the channel and 9,26 on the outlet. The result showed that the fly ash sample was highly reactive to neutralize acidic water because the sample had a paste pH value of 9,92; NAG pH of 9,4 and ANC value of 337,88 kg H2SO4/ton of rock; and CaO content > 10%. |
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