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Karakterisasi Pembentukan Air Asam Tambang pada Endapan Batubara Formasi Warukin Kalimantan Selatan Zakhyar, Fardha; Syaputra, Rizky; Agustin, Friska; Santoso, Andyono Broto; Andriansyah, Rian; Khasanah, Icha Nur; Zahwa, Afifah Faiza
UNISTEK Vol. 11 No. 1 (2024): Februari - Juli 2024
Publisher : UNIVERSITAS ISLAM SYEKH YUSUF TANGERANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33592/unistek.v11i1.4566

Aktivitas tambang terbuka dalam penambangan batubara di Indonesia sering dikaitkan dengan munculnya dampak lingkungan. Dampak lingkungan tersebut antara lain munculnya air asam tambang. Demi meminimalisir hal tersebut, perlu dilakukan antisipasi dengan mengidentifikasi batuan yang berpotensi membentuk asam dan menginterpretasikan daerah pengaruhnya. Metode yang digunakan dalam penelitian ini adalah analisis geokimia menggunakan uji statik untuk mengetahui potensi pembentukkan asam berdasarkan SNI 6597:2011. Analisis geokimia berperan untuk mengetahui batuan potential acid forming (PAF) dan non-acid forming (NAF) pada Formasi Warukin Kalimantan Selatan yang diambil dari berbagai litologi seperti sandstone, mudstone, dan shalestone. Berdasarkan hasil pengujian geokimia pada litologi batuan yang sama terkadang memiliki potensi pembentukan air asam tambang yang berbeda. Hal ini dipengaruhi oleh intensitas pelapukan yang disebabkan oleh kondisi iklim dan topografi yang relatif datar serta kemiringan lereng yang relatif lebih landai. Sehingga, upaya mitigasi pembentukan air asam tambang dapat dilakukan dengan mengetahui karakteristik batuan yang mengandung mineral sulfida dan mengalami kontak dengan udara serta air. Upaya pencegahan dapat dilakukan dengan melakukan perancangan yang baik terhadap kemiringan lereng. Sehingga dapat meminimalisir terjadinya erosi dan terbentuknya genangan air, serta dapat mencegah terjadinya pembentukan air asam tambang sebagai usaha penanggulangan dampak lingkungan tidak semakin meluas.

Prediction of Potential Acid Mine Drainage Formation in High Sulfidation Epithermal Deposit using Geochemical and Mineralogy Approaches Syaputra, Rizky; Kusuma, Ginting Jalu; Badhurahman, Abie
EKSPLORIUM Vol 44, No 1 (2023): May 2023
Publisher : Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/eksplorium.2023.6652

Identification of acid mine drainage (AMD) can be predicted using a geochemical and mineralogy characterization approach to identify rocks forming and neutralizing acids. Geochemical characterization using static and kinetic tests. The static test is the first step to determining the potential for acid formation in rocks by comparing the potential for forming and neutralizing acids, which are characterized by uncertain behavior that causes predictions to be inaccurate. Kinetic tests were carried out to predict the long-term acid-producing potential better. Furthermore, mineralogical characterization is needed to assess the importance of sample mineral content in predicting AMD. Tests were conducted on rock samples from high sulfidation epithermal (HSE) deposits in North Sulawesi, Indonesia. The samples represent the different geological domain conditions found in HSE deposits. The main acid-producing components are pyrite and secondary minerals (alunite) capable of buffering acidity. The results showed a lower change in leachate pH (from day 30 to 180) and were accompanied by the release of species (high dissolved metals).

The Effect of Fly Ash Ratio Addition as Layering Material Using Free Draining Column Leach Test Method on Laboratory Scale Harnanda, Suriandi; Kusuma, Ginting Jalu; Badhurahman, Abie; Syaputra, Rizky
EKSPLORIUM Vol 44, No 1 (2023): May 2023
Publisher : Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/eksplorium.2023.6707

Acid mine drainage (AMD) is formed due to the oxidation of sulfide minerals in the presence of water and air. AMD already entering the environment can damage the aquatic ecosystem due to low pH and high dissolved metal concentrations. Efforts to prevent the formation of AMD are by regulating the stockpiling of materials containing sulfide or potential acid forming (PAF) with non-acid forming (NAF) to avoid oxidation reactions of sulfide minerals. The purpose of this study was to simulate the effect of adding fly ash ratio as a PAF rock coating material to the quality characteristics of leachate using the laboratory-scale free draining column leach test (FDCLT) method. Adding fly ash ratio as a layering material significantly affects the quality of the resulting leachate. This is due to the physical condition of the fly ash material, which cannot prevent the meeting of AMD-forming components.

Relationship of Rock Geomechanics and Coal Mine Slope Safety Factor in South Sumatra Region, Indonesia Retongga, Nofrohu; Saputa, Rio Bagas; Agustin, Friska; Syaputra, Rizky; Razi, Muhammad Haikal; Zahidah, Atikah; Nainggolan, Efrat N
Journal of Earth and Marine Technology (JEMT) Vol 4, No 1 (2023)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2023.v4i1.4852

The research location is in the coal mine area South Sumatera region, Indonesia. This study aims to determine the geomechanics relationship of the rock which includes the physical properties of the rock: bulk density, and mechanical properties of the rock (shear strength), cohesion and internal shear angle to the safety factor of the coal mine slopes in the study area. Field research is carried out by observing and measuring directly in the field in the following ways: (a) Measuring slope azimuth, slope, dip direction and slope height and width using a measuring tape and geological compass. (b) Rock description based on physical characteristics (megascopic) and rock sampling for testing the physical and mechanical properties of the rock in the laboratory. (c) Observing the general condition of water from rock slopes (dry, moist, watery, wet or flowing) and slope vegetation. 2. Cohesion values and internal shear angles are secondary data obtained from PT. X which has been analyzed in the laboratory. 3. Slope modeling was carried out using Rocscience Slide software. This shows that the smaller the rock density value, the greater the rock cohesion value. The greater the cohesion value of the rock, the smaller the value of the shear angle on the rock. The smaller the value of the shear angle in the rock, the greater the value of the safety factor of the rock slope.

The Influence of Product Variety, Price, Promotion, and Service Quality on Repurchase Interest in Raja Kebab and Rantauprapat Burger Culinary Delights Armada. S, Kiki; Nasution, Siti Lam’ah; Syaputra, Rizky
Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE) Vol 5 No 2 (2022): Sharia Economics
Publisher : Sharia Economics Department Universitas KH. Abdul Chalim, Mojokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31538/iijse.v5i2.4056

This study aims to analyze the effect of product variations, prices, promotions, and service quality on repurchase interest. The type of research used is explanatory research with an accidental sampling technique. The number of samples set is 100 respondents. Data analysis in this study used SPSS version 22 software. The results showed that product variations affected repurchase interest, price influenced repurchase interest, promotions influenced repurchase interest, and service quality influenced repurchase interest. Simultaneously, product variation, price, promotion, and service quality affect repurchase interest.

Prediction of Potential Acid Mine Drainage Formation in High Sulfidation Epithermal Deposit using Geochemical and Mineralogy Approaches Syaputra, Rizky; Kusuma, Ginting Jalu; Badhurahman, Abie
EKSPLORIUM Vol. 44 No. 1 (2023): MAY 2023
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/eksplorium.2023.6652

Identification of acid mine drainage (AMD) can be predicted using a geochemical and mineralogy characterization approach to identify rocks forming and neutralizing acids. Geochemical characterization using static and kinetic tests. The static test is the first step to determining the potential for acid formation in rocks by comparing the potential for forming and neutralizing acids, which are characterized by uncertain behavior that causes predictions to be inaccurate. Kinetic tests were carried out to predict the long-term acid-producing potential better. Furthermore, mineralogical characterization is needed to assess the importance of sample mineral content in predicting AMD. Tests were conducted on rock samples from high sulfidation epithermal (HSE) deposits in North Sulawesi, Indonesia. The samples represent the different geological domain conditions found in HSE deposits. The main acid-producing components are pyrite and secondary minerals (alunite) capable of buffering acidity. The results showed a lower change in leachate pH (from day 30 to 180) and were accompanied by the release of species (high dissolved metals).

The Effect of Fly Ash Ratio Addition as Layering Material Using Free Draining Column Leach Test Method on Laboratory Scale Hernanda, Suriandi; Kusuma, Ginting Jalu; Badhurahman, Abie; Syaputra, Rizky
EKSPLORIUM Vol. 44 No. 1 (2023): MAY 2023
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/eksplorium.2023.6707

Acid mine drainage (AMD) is formed due to the oxidation of sulfide minerals in the presence of water and air. AMD already entering the environment can damage the aquatic ecosystem due to low pH and high dissolved metal concentrations. Efforts to prevent the formation of AMD are by regulating the stockpiling of materials containing sulfide or potential acid forming (PAF) with non-acid forming (NAF) to avoid oxidation reactions of sulfide minerals. The purpose of this study was to simulate the effect of adding fly ash ratio as a PAF rock coating material to the quality characteristics of leachate using the laboratory-scale free draining column leach test (FDCLT) method. Adding fly ash ratio as a layering material significantly affects the quality of the resulting leachate. This is due to the physical condition of the fly ash material, which cannot prevent the meeting of AMD-forming components.

Facies and Depositional Environment Analysis of Limestone in Citeureup Area, West Java, Indonesia Andriansyah, Rian; Syaputra, Rizky; Robbani, Nur Ikhsan; Tabri, Kristian Nurwedi
EKSPLORIUM Vol. 45 No. 2 (2024): NOVEMBER 2024
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/eksplorium.2024.6953

The Citeureup area in West Java Province hosts Middle Miocene limestone outcrops belonging to the Klapanunggal Formation, which has long been considered a promising source of raw material for Indonesia’s cement industry. Despite its economic significance, detailed sedimentological studies and facies characterization of this formation remain limited. This study aims to identify the dominant lithofacies and reconstruct depositional environments to understand the formation’s genesis and assess its resource potential. Thin-section petrographic analysis, enhanced with blue epoxy resin, was employed to identify porosity, fossil assemblages, and mineral composition. The investigation revealed three primary facies types: packstone, boundstone, and dolomitic grainstone. The packstone and dolomitic grainstone facies are interpreted to have formed in reef-flat settings, associated with shallow, high-energy marine conditions. The boundstone facies, in contrast, are linked to reef-crest environments subjected to more dynamic hydrodynamic regimes. These findings point to a depositional system characteristic of a carbonate platform shaped by variable energy conditions. The presence of abundant skeletal grains, well-developed porosity, and mature mineralogical features indicates the limestone’s high potential as a quality raw material for cement production. Beyond its industrial relevance, the study enhances sedimentological insights into the Klapanunggal Formation and provides a scientific basis for informed resource evaluation and sustainable exploitation strategies in similar carbonate settings.

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