Kajian karakterisasi geokimia batuan penutup di tambang batubara, pt. x
Info Katalog
File Repositori
Penerbit : FTKE - Usakti
Kota Terbit : Jakarta
Tahun Terbit : 2026
Pembimbing 1 : Edy Jamal Tuheteru
Pembimbing 2 : Suliestyah
Subyek : Geochemical modeling;Coal mines and mining, Prehistoric
Kata Kunci : Acid Mine Drainage; Geochemical Characterization; Static Test; Kinetic Test; Coal Mine.
Status Posting : Published
Status : Lengkap
File Repositori
| No. | Nama File | Hal. | Link |
|---|---|---|---|
| 1. | 2026_SK_STT_073002100048_Halaman-Judul.pdf | ||
| 2. | 2026_SK_STT_073002100048_Surat-Pernyataan-Revisi-Terakhir.pdf | 1 | |
| 3. | 2026_SK_STT_073002100048_Surat-Hasil-Similaritas.pdf | 1 | |
| 4. | 2026_SK_STT_073002100048_Halaman-Pernyataan-Persetujuan-Publikasi-Tugas-Akhir-untuk-Kepentingan-Akademis.pdf | 1 | |
| 5. | 2026_SK_STT_073002100048_Lembar-Pengesahan.pdf | 1 | |
| 6. | 2026_SK_STT_073002100048_Pernyataan-Orisinalitas.pdf | 1 | |
| 7. | 2026_SK_STT_073002100048_Formulir-Persetujuan-Publikasi-Karya-Ilmiah.pdf | 1 | |
| 8. | 2026_SK_STT_073002100048_Bab-1.pdf | ||
| 9. | 2026_SK_STT_073002100048_Bab-2.pdf |
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| 10. | 2026_SK_STT_073002100048_Bab-3.pdf |
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| 11. | 2026_SK_STT_073002100048_Bab-4.pdf |
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| 12. | 2026_SK_STT_073002100048_Bab-5.pdf | ||
| 13. | 2026_SK_STT_073002100048_Daftar-Pustaka.pdf | ||
| 14. | 2026_SK_STT_073002100048_Lampiran.pdf |
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A Air asam tambang (aat) merupakan salah satu permasalahan lingkungan utama pada kegiatan pertambangan batubara yang menerapkan metode tambang terbuka (surface mining), sebagaimana yang dilakukan pt. x di kalimantan timur. aat terbentuk ketika mineral sulfida, terutama pirit (fesâ‚‚), teroksidasi oleh oksigen dan air sehingga menghasilkan asam sulfat serta melarutkan logam berat. penelitian ini bertujuan mengevaluasi potensi pembentukan aat melalui karakterisasi geokimia batuan pada delapan sampel mudstone yang diambil dari dinding pit a. karakterisasi dilakukan melalui uji statik (ph pasta, net acid generation (nag), acid base accounting (aba) yang mencakup total sulfur (ts), maximum potential acidity (mpa), acid-neutralizing capacity (anc), net acid producing potential (napp), dan neutralisation potential ratio (npr)) dan uji kinetik free draining column leach test (fdclt) selama 25 siklus mengacu pada sni 6597 (2021) dan amira p387a (2002), yang diperkuat analisis mineralogi x-ray fluorescence (xrf) dan x-ray diffraction (xrd). hasil uji statik mengklasifikasikan sampel a (12,5% dari total sampel) sebagai uncertain (uc) karena terdapat ketidaksesuaian antara nilai napp (-0,02 kg hâ‚‚soâ‚„/ton) yang mengarah ke non-acid forming (naf) dan nilai nagph (3,80) yang mengarah ke potentially acid forming (paf). uji kinetik dan analisis mineralogi kemudian mempertegas sampel a ke arah paf berkapasitas rendah (paf-low capacity), yang ditandai oleh ph lindi yang berulang kali turun di bawah 6 disertai orp tertinggi (rata-rata harian 375,9 mv), anc yang sangat rendah (0,63 kg hâ‚‚soâ‚„/ton), tidak terdeteksinya mineral karbonat pada xrd, dan kadar cao terendah (0,168% massa) pada xrf. status berkapasitas rendah ini sejalan dengan kadar sulfur total yang sangat rendah (0,02%), sehingga ph lindi tidak pernah turun di bawah 4,5 selama 25 siklus dan jumlah asam yang dapat dihasilkan sampel a terbatas. tujuh sampel lainnya (87,5%) tergolong naf. sampel g dan d, meskipun tergolong naf, kedua sampel tersebut menunjukkan adanya risiko saline drainage yang ditandai nilai electrical conductivity (ec) dan total dissolved solids (tds) yang tinggi pada kondisi ph netral. penelitian ini merekomendasikan penanganan selektif terhadap material paf serta pemantauan berkala terhadap material yang berpotensi menimbulkan saline drainage (sd).
A Acid mine drainage (amd) is one of the principal environmental problems in coal mining operations that apply the surface mining method, as practised by pt. x in east kalimantan. amd forms when sulfide minerals, mainly pyrite (fesâ‚‚), are oxidised by oxygen and water, producing sulfuric acid and dissolving heavy metals. this study aims to evaluate the potential for amd formation through geochemical characterization of eight mudstone samples collected from the pit a wall. characterization was carried out through static tests (paste ph, net acid generation (nag), and acid base accounting (aba) comprising total sulfur (ts), maximum potential acidity (mpa), acid-neutralizing capacity (anc), net acid producing potential (napp), and neutralisation potential ratio (npr)) and a free draining column leach test (fdclt) kinetic test over 25 cycles referring to sni 6597 (2021) and amira p387a (2002), supported by mineralogical analyses x-ray fluorescence (xrf) and x-ray diffraction (xrd). the static test results classified sample a (12.5% from all samples) as uncertain (uc), owing to a discrepancy between its napp value (-0.02 kg hâ‚‚soâ‚„/ton), which points to naf, and its nagph (3.80), which points to paf. the kinetic test and mineralogical analyses subsequently confirmed sample a as paf-low capacity, indicated by leachate ph values repeatedly falling below 6 accompanied by the highest orp (average daily value of 375.9 mv), a very low acid neutralizing capacity (anc of 0.63 kg hâ‚‚soâ‚„/ton), the absence of carbonate minerals in the xrd analysis, and the lowest cao content (0.168 wt%) in the xrf analysis. this low-capacity status is consistent with the very low total sulfur content (0.02%), such that the leachate ph never fell below 4.5 over the 25 cycles and the amount of acid sample a can generate is limited. the other seven samples (87.5%) are classified as non-acid forming (naf). samples g and d, although classified as naf, exhibit a saline drainage risk indicated by high electrical conductivity (ec) and total dissolved solids (tds) under neutral ph conditions. this study recommends selective handling of paf material and periodic monitoring of material with saline drainage (sd) potential.
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