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Journal : Indonesian Mining Journal

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OVERBURDEN TREATMENT TECHNOLOGY IN ACID MINE DRAINAGE PREVENTION ALI RAHMAT KURNIAWAN; Retno damayanti
Indonesian Mining Journal Vol 10 No 2 (2007): INDONESIAN MINING JOURNAL Vol. 10 No. 2 June 2007
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol10.No2.2007.621

Abstract

The prevention and control of acid drainage is a major issue for mine operators at sites where sulfide minerals occur. On going risk assessment of acid drainage potential and sulfidic waste management during planning, development, operation and closure of mining developments will result in substantial environmental and economic benefits. Overburden treatment technology must be identified and imple- mented in order to minimize the production of acid mine drainage (AMD). There are many treatment technologies for AMD prevention at surface mining such as alkaline addition and special handling. Overburden analysis (OBA) refers to determination of the acidity or alkalinity producing potential. The addition of alkaline material to surface mine backfill can be an effective method of compensating for overburden and reduce the potential for acid mine drainage. Special handling methods fall into four categories: blending, encapsulation, submergence and alkaline redistribution. Special handling is most effective in conjunction with other best management practices such as alkaline addition. Moni- toring during and after mining is necessary to evaluate special handling techniques.
PREDICTION OF MINE DRAINAGE QUALITY BY KINETIC TESTS LASMARIA SIBARANI; Retno damayanti
Indonesian Mining Journal Vol 9 No 3 (2006): INDONESIAN MINING JOURNAL Vol. 09 No. 3 October 2006
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol9.No3.2006.640

Abstract

Kinetic test is one of the methods to predict acid mine drainage. The test shows the acceleration of natural oxidation rate over those observed in the field. This may have the advantage of condensing time, and providing earlier insight into the potential for acid generation. Generally, kinetic test evalu- ates the changes in pH, sulfate, acidity and host of potential metals. However, the test also has high degree uncertainty. To minimize the uncertainty it needs to calibrate and validate the model of kinetic test by comparing prediction model with actual field sampling results. As field data availability for validation is limited, it is strongly suggested that researcher should make a continuous research from the prediction and the actual sampling using many methods.
INDOOR AIR POLLUTION FROM BRIQUETTE-BURNING STOVES SELINAWATI T.D. SELINAWATI; Retno damayanti; HERNI KHAERUNISA
Indonesian Mining Journal Vol 9 No 1 (2006): INDONESIAN MINING JOURNAL Vol. 09 No. 1 February 2006
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol9.No1.2006.659

Abstract

Recently, the use of coal briquette has already been socialized to substitute the role of oil and firewood in the household and small industries. In general the use of coal briquette burning stoves for household and small industries purposes is often conducted indoors, with inadequate ventilation. Yet knowledge of emissions from coal briquette burning stoves and how to evaluate emission and expo- sure levels are very limited and need to be developed. Study of indoor air pollution was undertaken to evaluate SO2, CO and NOx concentrations and its exposure potentials coming from the utilization of coal briquette for household and small industries purposes. Its results were compared to the charcoal burning process. To estimate the indoor concentration and exposure potential, the single-compart- ment mass balance model was used. Results show that the total amounts of hourly emitted SO2, CO and NOx for 1 kg coal briquette burning vary from 5.32-14.71 mg kg-1; 2.76-12.54 mg kg-1 and 112- 288 mg kg-1, respectively. While those emitted from charcoal burning are 0 mg kg-1, 6.79 mg kg-1 and 201 mg kg-1. The air exchange rate gives an effect to concentration level, peak indoor concentration and duration after the burning process. The hourly average concentrations of SO2, CO and NOx in the unventilated room are 22, 42 and 10 times, respectively higher than the used standards. While for charcoal burning, those were 0, 17 and 6 times, respectively.
Co-Authors ALI RAHMAT KURNIAWAN HERNI KHAERUNISA LASMARIA SIBARANI SELINAWATI T.D. SELINAWATI