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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Journal of Geoscience, Engineering, Environment, and Technology Jurnal Geosains dan Teknologi Jurnal Himasapta Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Journal of Earth and Marine Technology (JEMT) Journal of Civil Engineering and Technology Sciences Indonesian Journal of Environment and Disaster Beujroh : Jurnal Pemberdayaan dan Pengabdian pada Masyarakat Dinamika Teknik Sipil: Majalah Ilmiah Teknik Sipil Jurnal Teknologi Sumberdaya Mineral
Emanuel G. Manek
Program Studi Teknik Pertambangan, Fakultas Teknik, Universitas Jember
Agriculture, Biological Sciences & Forestry Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Engineering Environmental Science Physics Social Sciences Transportation Other

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Studi Kematangan Batubara Formasi Warukin Berdasarkan Analisis Geokimia dan Reflectance Vitrinite di Barito Selatan, Kalimantan Tengah Nefia, Arica; Manek, Emanuel Grace
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 7 No. 1 (2026): Februari
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v7i1.1709

Abstract

The Warukin Formation is one of the principal coal-bearing units within the Barito Basin, where coal quality and maturity are strongly influenced by local geological conditions and thermal history. This study aims to determine the coal maturity level of the Warukin Formation in South Barito, Central Kalimantan, through the integration of geochemical analyses and vitrinite reflectance measurements. The methods employed include proximate and ultimate analyses, as well as vitrinite reflectance (Ro) measurements on four coal seams (Seams A, B, C, and D). Proximate analysis results on a dry mineral matter free (dmmf) basis indicate fixed carbon values ranging from 52.41–56.07%, volatile matter from 43.93–47.59%, and calorific values between 11,003.64–11,500.54 cal/g. These parameters consistently classify all seams as Subbituminous A coal rank according to ASTM standards. Vitrinite reflectance measurements show average Ro values ranging from 0.37% to 0.61%, generally corresponding to the Subbituminous rank, with localized increases up to High Volatile Bituminous C in Seam A. These findings indicate that the coal of the Warukin Formation in the study area exhibits low to moderate maturity, with localized variations in thermal maturity. The integration of geochemical data and vitrinite reflectance analysis proves effective in evaluating coal maturity and provides an important basis for assessing coal quality and utilization potential within the Barito Basin.
Characterization Coal of The Warukin Formation in Kananai Village, South Barito, Central Kalimantan, Indonesia Arica Nefia; Manek, Emanuel Grace
Journal of Geoscience, Engineering, Environment, and Technology Vol. 11 No. 1 (2026): JGEET Vol 11 No 01 : March (2026)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2026.11.1.21616

Abstract

This research was conducted to identify geological conditions and the influence of maceral composition on the quality and rank of coal in the study area, which is divided into four rock units. The method used is surface geological mapping to describe the local geological conditions, as well as laboratory analysis which includes maceral analysis, vitrinite reflectance, proximate, and calorific value. The focus of the research is on the unit bedding of mudstone and sandstone with Coal (Warukin Formation) which is a coal-bearing unit. The results of the analysis show that the coal in the study area has the highest rank with an average vitrinite reflectance value (Rv%) of 0.55, the calorific value of 6896 cal/gr, and coal rank is included in the high volatile bituminous C category.
Identifikasi Sumber Pencemaran Kualitas Air Berdasarkan Rasio Nitrat dan Klorida Serta Parameter Bakteri Fecal Coliform di Mata Air Mrutu dan Sekitarnya, Kabupaten Lumajang, Jawa Timur Manek, Emanuel Gracek; Amirrul, Hafids Galant; Rachman, Mochammad Hasmannoor
JENERAL Vol. 6 No. 2 (2025)
Publisher : JENERAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jeneral.v6i2.60004

Abstract

Kabupaten Lumajang Provinsi Jawa Timur secara administratif terletak pada lereng gunung api Bromo sehingga memiliki banyak mata air. Salah satu mata air tersebut adalah mata air Mrutu yang terletak di bagian timur Gunung Bromo dengan debit 1.750 Liter/detik yang potensi menjadi penyedia air melalui SPAM regional dimasa yang akan datang selama kuantitas dan kualitasnya sesuai dengan peruntukannya. Oleh karena itu dilakukan fokus kajian pada sumber pencemar yang berpotensi mendegradasi kualitas mata air Mrutu dan sekitarnya. Pengambilan sampel mata air untuk mengetahui kandungan nitrat, ion klorida dan bakteri fecal coliform pada air tanah dilakukan sebanyak 10 sampel di sekitar wilayah mata air Mrutu. Rata-rata rasio nitrat dan klorida pada air tanah di daerah penelitian berada pada rasio 3:1. Sebagian besar nitrat yang terdapat pada air tanah di daerah penelitian berasal dari feses, sumber dari feses tersebut dapat berasal dari kebocoran pada sistem sanitasi pada rumah, adanya peternakan, dan penggunaan pupuk yang berbahan dari feses hewan pada area perkebunan dan tegalan/ladang yang juga berperan besar juga dalam pencemaran dikarenakan wilayah penelitian yang masih jarang pemukiman dan didominasi oleh wilayah perkebunan dan ladang.berdasar pada kelas air dalam PP Nomor 22 Tahun 2021 tentang Peyelenggaraan Perlindungan dan Pengelolaan Lingkungan Hidup maka MA 13, MA 19 melebihi ambang batas kelas I. Perlu di perhatikan bahwa selain di MA 16 dan MA 26 yang mengandung fecal coliform yang < 1,8  teridentifikasi mengandung fecal coliform sehingga pemberlakuan zona perlindungan mata air perlu diimplementasikan.
Co-Authors Aliansyah, Muhammad Yusuf Amirrul, Hafids Galant Aprilia, Faridha Arica Nefia Arica Nefia Arrisaldi, Thema Assyarbini, Muhammad Akbar Bachri, Rian Akmal Fanteri Aji Dharma Suparno Haeruddin Haeruddin Kurnia Dewi Mulyani Kusuma, Di Ajeng Arum Manurung, Joel Maruba Padang, Ostwald Rachman, Mochammad Hasmannoor Rina Lestari Rini, Utari Retno Sulistyo Sitepu, Dio Aldestra Siti Aminah Susatio, Raja Triatmojo, Mohammad Afiandy Utari Retno Sulistyo Rini Wahyu Wilopo