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Firman Firman
Prodi Teknik Pertambangan Fakultas Teknik Universitas Khairun
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Journal : Journal of Science and Engineering

 1 
ANALISIS KANDUNGAN LOGAM BERAT ABU BATUBARA PLTU BANGKO BARAT KAB. MUARA ENIM SUMATERA SELATAN Firman Firman
Journal of Science and Engineering Vol 3, No 1 (2020): Journal Of Science and Enggineering (JOSAE)
Publisher : Fakultas Teknik Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/josae.v3i1.2070

Abstract

Coal combustion product (CCP) from Bangko Barat Power Plant is used as landfill material in acidic overburden layers. CCP is categorized as hazardous and toxic waste (PP No.101/2014) from specific sources and is known to contain heavy metals. This study aims to analyze the heavy metal content of coal combustion product from Bangko Barat Power Plant, Muara Enim Regency, South Sumatra Province. Heavy metal content of CCP includes Hg, Cd, Cu, Ag, Ni, Pb, As, Cr, Sn, Zn dan Mn. Heavy metal content analysis to ensure overburden piling by utilizing CCP, either with a long-term safe coating or mixing scheme. The analysis was carried out by using ICP-MS test, XRF test, XRD test, analysis of grain size and grain morphology. Samples of fly ash and bottom ash were categorized as non- hazardous and toxic waste based on the results of the ICP-MS test compared to the values of TK-A, TK-B and TK-C. Heavy metal content that needs attention from coal ash is As (4.4-20 ppm), Cr (26-43 ppm), Cu (30.7-42.6 ppm), Pb (22,2-29,3 ppm), Zn (77.5-128 ppm), Ni (10,6-24,8 ppm) and Mn (144-396 ppm). The content of other heavy metals is relatively low (Hg, Cd, Ag and Sn) and the threshold is not exceeded. Monitoring the quality of runoff water from landfill area using CCP to be controlled so that the heavy metal content does not endanger the health of living things.
PENYEBARAN ENDAPAN NIKEL LATERIT PULAU OBI KABUPATEN HALMAHERA SELATAN PROVINSI MALUKU UTARA Arbi Haya; Wawan Ak Conoras; Firman Firman
Journal of Science and Engineering Vol 2, No 1 (2019): Journal Of Science and Enggineering (JOSAE)
Publisher : Fakultas Teknik Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (656.33 KB) | DOI: 10.33387/josae.v2i1.1657

Abstract

Nikel laterit adalah produk residual pelapukan kimia pada batuan ultrabasa. Pelapukan pada peridotit menyebabkan unsur-unsur dengan mobilitas rendah sampai immobile seperti Ni, Fe dan Co mengalami pengayaan secara residual dan sekunder. Pulau Obi merupakan salah satu daerah yang dianggap prospek terhadap endapan nikel laterit terutama di Pulau Obi bagian Utara. Kandungan logam Ni (nikel), Fe (besi), dan Co (kobal), di daerah ini merupakan hasil pelapukan dari dunit. Penelitian ini melakukan pengkajian lebih spesifik mengenai penyebaran endapan nikel laterit khususnya di Pulau Obi, Kabupaten Halmahera Selatan, Propinsi Maluku Utara. Litologi daerah penelitian disusun oleh konglomerat, diorit dan dunit. Profil endapan nikel laterit daerah penelitian terdiri atas zona limonit, saprolit dan bedrock. Ketebalan zona limonit bervariasi dari 1 - 5 meter. Ketebalan zona saprolit mencapai 16 meter. Berdasarkan penelitian dapat disimpulkan bahwa profil geokimia di daerah penelitian menujukan terjadinya ketidak normalan distribusi unsur-unsur yang ada, baik unsur Ni, Co, Fe, SiO2, CaO dan MgO. Selain itu, ketebalan dan kedalaman endapan nikel laterit dapat bervariasi. Oleh karena itu perlu dilakukan penelitian yang lebih mendalam lagi mengenai penyebaran endapan nikel laterit karena setiap lokasi memiliki karakteristik yang berbeda.
ANALISIS POTENSI LOGAM TANAH JARANG ABU BATUBARA LIMBAH PLTU MULUT TAMBANG PT. WANATIARA PERSADA KAWASI OBI Said Hi Abbas; Firman Firman
Journal of Science and Engineering Vol 3, No 2 (2020): Journal Of Science and Enggineering (JOSAE
Publisher : Fakultas Teknik Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/josae.v3i2.2424

Abstract

Abu batubara merupakan limbah sisa pembakaran batubara pada PLTU, baik berupa fly ash maupun bottom ash. PLTU PT. Wanatiara Persada terkategori PLTU Mulut Tambang karena letaknya dalam lokasi wilayah izin penambangan. Abu batubara sisa pembakarannya masih terkategori limbah B3 sehingga perlu diidentifikasi potensi pemanfaatannya (salah satunya sumber LTJ) guna mengurangi volumenya yang besar. Fly ash ukuran butirnya lebih halus (76,15% lolos ayakan 200 mesh) dibandingkan bottom ash (hanya 6,75% lolos ayakan 200 mesh) sesuai dengan hasil ayak basah dan pengamatan morfologi butir dengan menggunakan mikroskop bijih. Kandungan mineral bottom ash adalah kuarsa, aragonite, siderite dan hematit sedangkan fly ash kandungannya kuarsa, muskovit, periclase, hematit, magnetit dan pirit. Oksida dominannya untuk kedua sampel adalah SiO2 (50,6-67,9%), Al2O3 (8,15-21,9%), Fe2O3 (7,76-10,8), dan CaO (2,55-7,54%). Abu batubaranya terkategori kelas F. Kandungan logam tanah jarangnya untuk fly ash sebesar 190,07 ppm sedangkan pada bottom ash sebesar 142,64 ppm. Kandungan LTJ yang dominan pada sampel fly ash adalah Ce (61,8 ppm), Nd (31,8 ppm), Y (26,3 ppm), La (23,9 ppm) sedangkan pada bottom ash 4 unsur tersebut juga dominan, dimana Ce (46,2 ppm), Nd (24,1 ppm), Y (21 ppm), dan La (18,6 ppm). LTJ yang dominan adalah LTJ ringan (LREE) dibandingkan LTJ berat (HREE), perbandingannya adalah 175,27 ppm : 14,8 ppm atau 11,84 : 1 (sampel fly ash) sedangkan sampel bottom ash perbandingannya 131,04 ppm : 11,6 ppm atau 11,3 : 1.
KAJIAN POTENSI LONGSOR LERENG GALIAN CURAM DI KELURAHAN KALUMATA KOTA TERNATE MENGGUNAKAN GEOLISTRIK Jamalun Togubu; Firman Firman; Anas Abdul Latif; Amrih Halil; Samsulbahri M Madjid
Journal of Science and Engineering Vol 5, No 2 (2022): Journal Of Science And Engineering (JOSAE)
Publisher : Fakultas Teknik Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/josae.v5i2.5240

Abstract

The study of the potential for landslides on steep excavation slopes in Kalumata Village, Ternate City using geoelectricity is important to do. The location of the sirtu mining excavation which tends to be steep and close to residential areas is urgent to know the type of lithology so as to facilitate recommendations for handling to be carried out. The purpose of this study was to determine the lithological composition of the material from tracks 1, 2, and 3 along the steep excavation slope using the geoelectric resistivity Sclumberger configuration method. In addition, knowing the potential for landslides that will occur if there is no handling of steep slopes. This research is a quantitative type of field research. The research location is in the formation of lahar deposits (Gtla) and pyroclastic debris (pr) deposits. Trajectory 1 dominant lithology is 17.52 m of sand, andesite rock as an interlude and on the bedrock it is characterized by large resistivity (3241 m) while the top layer is clay type overburden. The 2 lithological paths consist of overburden, sand (7.82 m), silt (10.5 m), and andesite bedrock (resistivity 2811 m). The lithology of track 3 consists of overburden, andesite, sand (16.9 m), and andesite bedrock (4575 m). Lithology that tends to landslide in the field is overburden filled with sedimentary material in the form of clay, silt, and sandy silt (resistivity 1.5-114 m). Sand lithology with a resistivity of 479-855 m is very susceptible to landslides. Another factor causing landslides is the slope of the excavation which tends to be steep (> 60o). Keywords: Kalumata Village, Sclumberger configuration, lithology, landslide, sand
ANALISIS KUALITAS AIR TANAH DI KECAMATAN TERNATE SELATAN, KOTA TERNATE PROVINSI MALUKU UTARA Said Hi Abbas; Firman Firman; Syarifullah Bundang
Journal of Science and Engineering Vol 5, No 2 (2022): Journal Of Science And Engineering (JOSAE)
Publisher : Fakultas Teknik Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/josae.v5i2.5685

Abstract

Research on the analysis of groundwater quality in South Ternate District, Ternate City, North Maluku Province needs to be carried out considering that the community's water sources in the area come from groundwater (dug and drilled wells), so knowledge of groundwater quality in the form of pH, TDS, EC, and temperature be important. The purpose of this study is to determine the quality of groundwater; as well as recommendations related to groundwater quality in the South Ternate District area. The stages of the research method were carried out by collecting primary data in the form of well coordinates and elevation, physical properties of groundwater, groundwater quality measurement results and secondary data collection. The water quality results in the South Ternate District for the 40 samples measured ranged from pH 5.2 to 6.6; TDS 4-2150 ppm; EC 8-4240 µS/cm and temperature ranges from 26.5-29.7oC. Based on Permenkes Number 32 of 2017 concerning environmental health quality standards and water health requirements for sanitary hygiene purposes, only 3 wells had a pH in the range of 6.5-8.5, namely samples F-02, TO-01, and TO-02. The physical quality of groundwater shows that the closer to the east the pH is, the closer to neutral, while the west is lower. There are many low water pH because sampling is done in the dry season.Keywords: groundwater, water quality, pH, TDS, South Ternate
STUDI INTERPRETASI LAPISAN BAWAH PERMUKAAN TANAH DENGAN METODE GEOLISTRIK DI JALAN LINTAS SUBAIM-BULI KECAMATAN WASILE TIMUR KABUPATEN HALMAHERA TIMUR Amrih Halil; Arsal Tjina; Firman Firman; Alifianty Delila Imani Sumantri; Hilda Alkatiri
Journal of Science and Engineering Vol 6, No 1 (2023): JOURNAL OF SCIENCE AND ENGINEERING (JOSAE)
Publisher : Fakultas Teknik Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/josae.v6i1.6330

Abstract

Secara geologi, Pulau Halmahera mempunyai banyak pegunungan, sehingga sangat rentan sekali berpotensi longsor. Kabupaten Halmahera Timur merupakan salah satu lokasi dengan struktur tanah tidak kompak serta banyak lereng yang tidak stabil sehingga ada beberapa titik terjadi longsor. Tujuan dari penelitian ini yaitu untuk mengetahui susunan lapisan bawah permukaan tanah, pada lokasi jalan yang longsor di Kecamatan Wasile Timur dengan menggunakan metode geolistrik schlumberger. Pendugaan geolistrik ini dimaksudkan untuk memperoleh gambaran mengenai lapisan tanah di abwah permukaan dan kemungkinan terdapatnya lapisan pada kedalaman tertentu. Penelitian berlokasi di jalan lintas Subaim-Buli, Kecamatan Wasile Timur, Kabupaten Halmahera Timur, Provinsi Maluku Utara dan dilakukan selama 11 bulan.Dari hasil pembahasan dan analisa perhitungan maka dapat disimpulan bahwa secara geologi daerah lintasan 1 dan 2 terdapat di formasi bacan dengan jenis batuan tersusun atas batuan Gunung Api berupa Lava, Breksi dan Tufa sisipan Konglomerat dan Batupasir. Secara litologi lintasan 1 dan 2 masing-masing memiliki 4 perlapisan dengan kedalaman mencapai 25 m. Lintasan 1 terdiri dari 4 perlapisan: lapisan pertama aluvium ,lapisan ke 2 batupasir ,lapisan ke 3 batulanau , dan lapisan terakhir shale dengan nilai resistivitas antara 2.08-563Ωm. Lintasan 2 terdiri dari 4 perlapisan: lapisan pertama shale, lapisan ke 2 kerikil, lapisan ke 3 batulanau, dan lapisan terakhir shale, dengan nilai resistivitas antara 0.57s-1141Ωm.
Co-Authors Abbas, Said Hi Abdul Salam Munir Abriandi H. Lahia Alifianty Delila Imani Sumantri Almun Madi Amrih Halil Amsal Amsal Anas Abdul Latif Andi Arifah Pasri Arbi Haya Arif, Abdul Kadir D Aris, Ayub Pratama Arsal Tjina Ayyub Abd Hamid Badrun Ahmad Bakri, Suriyanto Danny Fauzah Darmansyah Adriyan Dewy Kumala Tehuayo Edward Rizky Ahadian Erwinsyah Tuhuteru Erwinsyah Tuhuteru Erwinsyah Tuhuteru Firman Nullah Yusuf George Belly Sahetapy Habiebie Anwar Harun Usman Harwan Harwan Hilda Alkatiri Hilda Alkatiri Ishak Ishak Jamalun Togubu Masruroh Masruroh Meidji, Icha Untari Moch Rio Pambudi Muhammad Fawzy Ismullah Massinai Ninasafitri, Ninasafitri Nurafni Sagaf Nurany Nurany Nurliah Jafar Nurmayasa Marsaoly Rahmania Nurdin Said Hi Abbas Said Hi Abbas Samsulbahri M Madjid Sitti Riatmi Nurhawaisyah Syarifullah Bundang Wahyu Hidayat Wawan A.K Conoras Zamroni I. DJ Camari