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All Journal Unistek: Jurnal Pendidikan dan Aplikasi Industri Journal of Earth and Marine Technology (JEMT) Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir
Andriansyah, Rian
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics Transportation

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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

Abstract

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.
Model of Hydraulic Conductivity, Infiltration Rate, and Permeability at Gold Mine Waste Dump in North Sulawesi, Indonesia Agustin, Friska; Pratono, Landy; Andriansyah, Rian; Retongga, Nofrohu; Umar, Emi Prasetyawati
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.v4i1.4811

Abstract

The research area is a gold mine operating in North Sulawesi. The aim of the study was to analyze and calculate hydrological parameters, namely: hydraulic conductivity, infiltration rate, and permeability to find out how strong the soil cover is at one level of waste disposal. The method used is the Measurement of hydraulic conductivity, infiltration rate, and permeability in the field, analysis, and calculation of hydraulic conductivity, infiltration rate, and permeability based on field data. In the designated regions of the waste dump, specifically areas 1a, b, and c, we observed certain hydrological patterns that are worth noting. Firstly, the hydraulic conductivity in these areas, which is a crucial determinant of the rate at which water can move through the soil, consistently showcased low average values. This is further supported by the similarly slow infiltration rate identified in the same zones. The ability of the soil to transmit water, i.e., its permeability, also followed this trend, with values leaning towards the lower end of the scale, indicating very slow permeability. One major contributory factor to these patterns appears to be the soil's composition. Predominantly made up of sandy loam, the soil in these areas exhibits high water retention capabilities. Sandy loam, by its nature, binds and retains water effectively, which could potentially explain the observed hydrological behaviors in waste dump areas 1a, b, and c.
Mobilitas Uranium pada Endapan Sedimen Sungai Aktif di Daerah Mamuju, Sulawesi Barat Mu’awanah, Frida Rosidatul; Priadi, Bambang; Widodo; Sukadana, I Gde; Andriansyah, Rian
EKSPLORIUM Vol. 39 No. 2 (2018): NOVEMBER 2018
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2018.39.2.4953

Abstract

Mamuju is an area that has a high dose rate (radioactivity) value. The research area consists of 6 sectors namely Ahu, Orobatu, Takandeang, Botteng, Pangasaan, and Taan Sector. Lithological distribution does not represent the distribution of uranium; therefore geochemical method is needed to observe the distribution of uranium in the drainage system. The aim of this research is to provide an overview of the mobility and distribution of uranium in the drainage system using stream sediment. Uranium mobility analysis uses labile percent obtained from the ratio of total uranium and labile uranium, the total uranium value obtained from the measurement of X-Ray fluorescence spectrometry and the value of labile uranium obtained from measurement of labile fluorimetry. The sample taken from 4 potential areas based on radiometric value Map. The result of analysis shows that Ahu Sector has labile uranium anomaly >113.44 ppm, Pangasaan Sector with labile uranium anomaly >168.63 ppm, Takandeang Sector with uranium labile anomaly values >74.36 ppm, and Botteng Sector with uranium labile anomaly >84.23 ppm. The anomaly types identified from two sectors, namely Ahu Sector anomaly is related to the precipitation of dissolved uranium hydrolysates in stream deposit originating from Ahu lava and Tapalang breccia, while Takandeang Sector anomaly is related to the enrichment of in situ uranium in soil and Takandeang lava.
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

Abstract

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.
Co-Authors Agustin, Friska Bambang Priadi I Gde Sukadana Khasanah, Icha Nur Mu’awanah, Frida Rosidatul Nofrohu Retongga Prasetyawati Umar, Emi Pratono, Landy Robbani, Nur Ikhsan Santoso, Andyono Broto Syaputra, Rizky Tabri, Kristian Nurwedi Widodo Zahwa, Afifah Faiza Zakhyar, Fardha