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All Journal Eksergi INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Jurnal Sosial dan Teknologi Jurnal Inovasi Pertambangan dan Lingkungan
Rika Ernawati
Universitas Pembangunan Nasional "Veteran" Yogyakarta
Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Transportation

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POST-COMBUSTION COAL DESULFURIZATION Review Silky Amanda Yuniar; Edy Nursanto; Rika Ernawati
Eksergi Vol 17, No 2 (2020)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v17i2.3828

Abstract

The sulfur content in coal ranges from 0.5 to 5%, and it is an impurity that must be removed before burning coal, due to the toxic effects and acid rain caused by SO2 gas generated from sulfur oxidation. Sulfur cleaning technology can be carried out on coal before combustion (pre-combustion), and can reduce the inorganic sulfur content by up to 50%; however, it cannot reduce the organic sulfur content. Therefore, the industry relies on post-combustion desulfurization to remove SO2 from the gas from coal combustion. The aim of the coal desulfurization review is to direct desulfurization research to be efficient and effective, as well as to be environmentally friendly. Sulfur in coal consists of organic sulfur and inorganic sulfur. Coal inorganic sulfur consists of pyrite (FeS2), sulfate, and sulfide. The largest composition is pyrite. Organic sulfur consists of hetero-atomic and heterocyclic (thiophenic) macromolecules that bind N and O atoms, aromatic sulfides, and aromatic disulfides (small amounts). Inorganic sulfur can easily be separated from coal by means of flotation, microwave energy, magnetic forces, ultrasonic energy, and as well as microorganisms. Meanwhile, organic sulfur cannot be separated from coal by using the methods used in the inorganic sulfur separation process. Organic sulfur can be removed by chemical and biodesulfurization, however, this process is inefficient for industrial scale. The most recommended method is the absorption of SO2 gas in the gas from coal combustion, or post-combustion desulfurization. Various methods have also been investigated to separate SO2 gas, and more details will be described in this paper.
Evaluasi Settling Pond pada Area Run of Mine (ROM) Masjon Parhusip; Rika Ernawati; Tedy Agung Cahyadi
Jurnal Inovasi Pertambangan dan Lingkungan Vol 1, No 1 (2021): Jurnal Inovasi Pertambangan dan Lingkungan
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jipl.v1i1.20705

Abstract

Kualitas air akibat terkontaminasi oleh batubara  akan membentuk larutan  yang bersifat asam , sehingga perlu dilakukan penanganan terlebih dahulu sebelum di alirkan ke sungai. Tujuan penelitian ini adalah mengevaluasi settling pond dengan menentukan curah hujan rencana menggunakan distribusi gumbell dan menghitung debit air limpasan dengan menggunakan metode rasional. Data curah hujan yang digunakan merupakan data 10 tahun (2010-2020). Dari hasil penelitian diketahui nilai curah hujan rencana dengan perhitungan distribusi gumbell untuk periode ulang 5 Tahun adalah 39,4 mm/jam, sehingga perhitungan dengan metode rasional diketahui Debit air limpasan adalah 13.110,98 m3/jam. Perhitungan dimensi geometri settling pond dapat menampun debit air limpasan 12.852 m3. Pada makalah ini, penulis merekomendasikan pembuatan saluran terbuka dengan membagi catchment area I dan II. Diharapkan debit air limpasan pada catchment area I yang tidak terkontaminasi oleh tumpukan batubara langsung mengalir ke sungai kecil. Dari rekomendasi tersebut memberikan nilai debit air limpasan pada catchment area II  menjadi  11.001,39 m3/jam. Sehingga settling pond dapat menampung debir air larian yang terkontaminasi oleh batubara pada catchment area II.
Adsorption of Heavy Metals Fe and Mn in Acid Mine Drainage from Coal Mining Waste Using Calcium Oxide and Fly Ash Hendra Pratama; Edy Nursanto; Rika Ernawati; Muhammad Giatman
invotek Vol 22 No 2 (2022): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v22i2.1020

Abstract

Acid mine drainage for Fe and Mn metals have a negative impact on the environment. This study studies the use of calcium oxide and fly ash as adsorbents, used to absorb Fe and Mn metals contained in acid mine drainage. This study aims to analyze the effectiveness of Calcium Oxide and fly ash as adsorbents, that an adsorbent of Fe and Mn metals in acid mine drainage. The method used is experimental with a laboratory scale, the test is carried out by adsorption using a batch system. Magnetic stirrer is used as a stirring medium in the adsorption process. Calcium oxide with various doses (0.1; 0.2; 0.3 grams) and fly ash with various doses (10; 14; 17 grams) were mixed with 250 ml acid mine drainage, then stirred at a speed of 150 rpm and (30; 60; 90 minutes) stirring time. The characterization of the adsorbent was carried out by SEM testing. The results show that fly ash adsorbent has a better adsorption effectiveness than calcium oxide. The effectiveness of Fe is 85.35% and Mn 78.14%. While calcium oxide has the effectiveness of Fe 72.91% and Mn 61.81%. SEM testing of holes that increase and enlarge after adsorption, as well as the filling of the cavity by the material indicates the success of the adsorption process.
Penentuan Debit Air Limpasan dan Luas Kompartemen pada Rencana Desain Wetland Bukit Ragas Muhammad Tri Aditya; Waterman Sulistyana Bargawa; Tedy Agung Cahyadi; Rika Ernawati; Edy Nursanto
Jurnal Sosial Teknologi Vol. 1 No. 2 (2021): Jurnal Sosial dan Teknologi
Publisher : CV. Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/jurnalsostech.v1i2.11

Abstract

Pada danau bekas tambang feldspar dipenuhi oleh air limpasan yangberpotensi mencemari lingkungan. Selama masa pascatambangdiperlukan pengelolaan kualitas air. Salah satu cara pengelolaan kualitasair yaitu remediasi pasif dengan menggunakan sistem wetland. Salahsatu aspek yang penting dalam desain wetland adalah aspek hidrologi.Air pada permukaan pada tambang terbuka bersumber dari air hujan.Wetland merupakan suatu fasilitas pengelolaan air buatan yang dangkaldengan menggunakan tanaman air. Prinsip wetland ialah menghilangkanpolutan dengan mempertimbangkan kondisi hidrologi setempat.Penelitian ini bertujuan untuk mengetahui besarnya debit air limpasanyang menuju desain wetland, serta untuk mengetahui luasan minimumkompartemen dari rencana desain wetland. Dalam penelitian inimenggunakan metode pengumpulan data, kemudian peneliti melakukananalisis intensitas curah hujan, luas daerah tangkapan hujan, kondisidanau bekas tambang, arah aliran air limpasan, analisis debit airlimpasan, dan analisis dimensi danau bekas tambang. Hasil penelitianmenunjukkan bahwa debit air limpasan hasil perhitungan sebesar 0,35m³/detik dan luas minimum kompartemen desain wetland hasilperhitungan yaitu sebesar 137 m2tiap kompartemen.
Co-Authors Cahyadi, Tedy Agung Edy Nursanto Hendra Pratama Masjon Parhusip Muhammad Giatman Muhammad Tri Aditya Silky Amanda Yuniar Waterman Sulistyana Bargawa