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All Journal International Journal of Advances in Applied Sciences Jurnal Rekayasa Proses International Journal of Renewable Energy Development SPEKTRUM INDUSTRI CHEMICA Jurnal Teknik Kimia Eksergi: Chemical Engineering Journal Prosiding Semnastek Elkawnie Indonesian Journal of Science and Technology Jurnal SOLMA Indonesian Journal of Chemistry Agroindustrial Technology Journal Sains Natural: Journal of Biology and Chemistry Chemistry Indonesian Journal of Chemical Research Jurnal Rekayasa Proses JURNAL PENGABDIAN KEPADA MASYARAKAT Jurnal Ilmiah Teknik Kimia Buletin Ilmiah Sarjana Teknik Elektro ASEAN Journal of Chemical Engineering Community Development Journal: Jurnal Pengabdian Masyarakat Jurnal Pengabdian Masyarakat Indonesia Muhammadiyah Journal of Nutrition and Food Science (MJNF) Makara Journal of Technology Ezra Science Bulletin Indonesian Journal of Chemical Engineering al Kimiya : Jurnal Ilmu Kimia dan Terapan Jurnal Rekayasa Proses
Siti Jamilatun
Department Of Chemical Engineering, Universitas Ahmad Dahlan, Yogyakarta, Indonesia
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Nursing Physics Public Health Social Sciences Other

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Comparative Analysis of Coal Quality across Various Coal Basins in Sumatra: A Case Study of Calorific Value, Moisture Content, and Sulfur Content Hanum, Farrah Hanum; Hapsauqi, Iqbal; Jamilatun, Siti; Nirmalasari, Jiran
Indonesian Journal of Chemical Research Vol 12 No 1 (2024): Edition for May 2024
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.12-han

Abstract

Indonesia and other countries have used coal as their main energy source for many years. Due to variances in coal formation, maturity, and geological history, each basin may have a range in coal quality. It houses unique coal basins—South Sumatra, Central Sumatra, Riau, and Aceh—each marked by distinct geological features. Variations in coal formation, maturity, and geological history contribute to quality differences. The analysis of coal quality plays a crucial role in determining its suitability for various applications, including power generation, industrial processes, and export purposes. This study focuses on the coal characteristics of Riau (Coal A), Bengkulu (Coal B), South Sumatra (Coal C), and Jambi (Coal D), evaluating parameters such as calorific value, moisture content, and sulfur content. Employing ASTM-based analysis methods, results reveal that Coal D exhibits the lowest sulfur but has a diminished calorific value, while Coal A boasts a higher calorific value but the highest total sulfur content. Understanding such distinctions is crucial for determining coal's suitability for diverse applications like power generation, industrial processes, and exports. Hopefully, this research could help in estimating the economic potential of these basins, identifying areas with higher-quality coal, and planning future exploration and development activities.
Biochar from slow catalytic pyrolysis of spirulina platensis residue: Effects of temperature and silica-alumina catalyst on yield and characteristics Siti Jamilatun; Ilham Mufandi; Arief Budiman; Suhendra
Jurnal Rekayasa Proses Vol 14 No 2 (2020): Volume 14, Number 2, 2020
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.56221

Abstract

The use of biochar varies on its ability as an adsorbent which adsorbs liquid or gas molecules. Biochar from Spirulina platensis residue (SPR) as an energy source, as its richness in nutrients, can be used as fertilizer and maintain water resources in plantations. Biochar can be used as an intermediary for the synthesis of nanotubes, activated carbon, carbon black, and carbon fiber. One of the essential things to be considered in the application of activated carbon from SPR is char’s characteristics. This study aimed to obtain data on the biochar and components from the pyrolysis of Spirulina platensis residue. The study was conducted in a fixed-bed reactor with electric heaters with a variety of temperatures (300-700 ⁰C) and the amount of silica-alumina catalyst (0-20%). The biochar weight was obtained by weighing the char formed at the end of the pyrolysis. The char characteristics were obtained by the surface area, total pore volume, and pore size analysis. Based on the study results, the relationship between temperature and the amount of catalyst on the characteristics of biochar was studied. The higher the pyrolysis temperature, the less biochar. Also, the use of catalysts can reduce the amount of biochar. The higher the temperature, the higher the surface area and the total pore volume while the pore radius was reduced. The optimum condition for maximum biochar yield in non-catalytic pyrolysis at a temperature of 300 ⁰C was 49.86 wt.%. The surface area, the total pore volume, and the pore radius at 700 ⁰C catalytic pyrolysis with 5% silica-alumina was obtained as 36.91 m2/g, 0.052 cm3/g, and 2.68 nm, respectively.
In-situ catalytic pyrolysis of spirulina platensis residue (SPR): Effect of temperature and amount of C12-4 catalyst on product yield Siti Jamilatun; Ratih Mahardhika; Imelda Ika Nurshinta; Lukhi Mulia Sithopyta
Jurnal Rekayasa Proses Vol 15 No 1 (2021): Volume 15, Number 1, 2021
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.60477

Abstract

Currently, dependence on fossil energy, especially petroleum, is still high at 96% of the total consumption. One solution to overcome fossil energy consumption is processing alternative energy sources derived from microalgae biomass. This study aims to study the pyrolysis of microalgae with the addition of the C12-4 (Cr2O3+Fe2O3+C+CuO+promoter) catalyst. The biomass used in this study was Spirulina platensis residue (SPR). This study used a fixed bed reactor with an outer diameter of 44 mm, an inner diameter of 40 mm, and a total reactor height of 600 mm. The C12-4 was mixed fifty grams of SPR with a particle size of 100 mesh with a ratio variation of 5, 10, and 15 wt.%. The feed mixture was placed in the reactor (in-situ), and the reactor was tightly closed. The nickel-wire heater wrapped around the reactor wall was employed. The pyrolysis heating rate was 24.33 °C/min on average, and the temperatures were varied as 300, 400, 500, 550, and 600 °C. The research found that the optimum temperature conditions without and with the catalyst to produce bio-oil were different. The pyrolysis without any catalyst (500 ⁰C), with a catalyst of 5 wt.% (500 ⁰C), 10 wt.% (400 ⁰C), and 15 wt.% (550 ⁰C) produced the bio-oil yield of 15.00, 17.92, 16.78 and 16.54, respectively. The use of 5, 10, and 15 wt.% catalysts increased the water phase yield. The char yield was influenced by the amount of catalyst only at 300 ⁰C; i.e., the more catalysts, the less char yield. The pyrolysis without any catalysts produced the highest gas product. A catalyst significantly increased the pyrolysis conversion from 48.69 (without catalyst) to 62.46% (15. wt.% catalyst) at a temperature of 300 ⁰C. The optimum conditions for producing the best bio-oil were at 600 °C and 10 wt.% of catalysts, which resulted in an O/C ratio of 0.14.
Potensi Teknologi Fitoremediasi Sebagai Polishing Treatment Palm Oil Mill Effluent : A Review Hakim, Lukman; Rahayu, Aster; Jamilatun, Siti
Prosiding Semnastek PROSIDING SEMNASTEK 2024
Publisher : Universitas Muhammadiyah Jakarta

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Abstract

Pesatnya ekspansi industri kelapa sawit menimbulkan potensi ancaman terhadap lingkungan. Industri ini menghasilkan limbah cair dalam jumlah besar yang dikenal sebagai palm oil milleffluent. Fitoremediasi merupakan salah satu teknologi alternatif yang dapat digunakan untuk polishing treatment palm oil mill effluent. Teknologi yang menggunakan tanaman ini dinilai lebih ramah lingkungan dan berbiaya rendah. Meskipun memiliki keuntungan, teknologi ini juga memiliki resiko seperti kontaminasi dari bagian tanaman yang dikonsumsi, dan juga efisiensi pengolahan yang rendah. Oleh karena itu, pemilihan tanaman yang tepat dan pemahaman mengenai mekanisme fitoremediasi adalah cara terbaik untuk dapat meningkatkan efisiensinya. Mekanisme seperti fitoekstraksi, fitostabilisasi, rhizofiltrasi, fitovolatilisasi, fitodegradasi dan fitodesalinasi adalah proses degradasi polutan. Proses ini dapat berlangsung baik dengan mempertimbangkan konsentrasi dan jenis kontaminan. Faktor-faktor seperti sifat tanaman, konsentrasi polutan, dan kondisi lingkungan mempengaruhi efektivitas fitoremediasi. Meskipun masih memiliki kekurangan, namun fitoremediasi merupakan pendekatan yang cukup menjanjikan untuk mengatasi permasalahan pencemaran yang disebabkann oleh industri minyak kelapa sawit dengan cara yang lebih ekonomis dan ramah lingkungan.Kata kunci: Fitoremediasi, Lingkungan, Polishing Treatment, POME
A Review : Optimalisasi Sisa Tanaman Hiperakumulator: Pemanfaatan dan Pengelolaan Biomassa Logam Berat Pasca-Fitoremediasi Jamilatun, Siti; Nurmustaqimah, Nurmustaqimah; Astuti, Erna; Rahayu, Aster
Prosiding Semnastek PROSIDING SEMNASTEK 2024
Publisher : Universitas Muhammadiyah Jakarta

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Abstract

Urbanisasi dan industrialisasi yang pesat meningkatkan risiko polusi logam berat, mengakibatkan dampak ekologis yang merugikan dan klasifikasi sebagai polutan utama. Logam berat seperti kadmium, kromium, merkuri, arsenik, timbal, dan seng tidak dapat terurai secara alami, menyebabkan tanah tidak cocok untuk pertanian. Fitoremediasi, dengan menggunakan tanaman hiperakumulator, muncul sebagai solusi untuk mengatasi kontaminasi logam berat, tetapi menghadapi tantangan polusi sekunder dari pelepasan ulang kontaminan oleh biomassa tanaman. Review ini mengevaluasi metode perlakuan pasca-fitoremediasi, termasuk perlakuan panas (insinerasi, pirolisis, dan gasifikasi), ekstraksi (dengan agen seperti amonium asetat dan amonium oksalat), pengomposan, dan pemadatan. Meskipun perlakuan panas efektif dalam menghilangkan logam berat, diperlukan penelitian lebih lanjut mengenai efisiensi dan pemulihan logam berat. Pengomposan, meskipun mengurangi volume biomassa, memiliki risiko remobilisasi logam berat. Pemadatan, sebagai alternatif, melibatkan tekanan untuk memadatkan biomassa tanaman. Pemilihan metode perlakuan harus mempertimbangkan efisiensi, biaya, dan dampak lingkungan. Kesadaran akan potensi polusi sekunder dan pengelolaan limbah hasil dari perlakuan sangat penting untuk keberlanjutan upaya remediasi logam berat. Diperlukan penelitian lanjutan dalam pengembangan teknologi pasca-fitoremediasi dan pemantauan lingkungan untuk mendukung keberlanjutan upaya remediasi logam berat.Kata kunci: Limbah, Biomassa, Logam berat, Lingkungan, Fitoremediasi
Review: Effect of Material Characteristics, and Process Conditions in Reducing Gaseous Pollutants Using Fly Ash (FA)-Based Adsorbent Setya Wardhana, Budi; Hanum, Farrah Fadhillah; Mufrodi, Zahrul; Jamilatun, Siti
JURNAL SAINS NATURAL Vol. 14 No. 4 (2024): Sains Natural
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31938/jsn.v14i4.749

Abstract

The intensive use of fossil fuels has led to a significant increase in air pollution, which negatively affects human health and the environment. Fly ash (FA), a byproduct of coal combustion, has great potential as an adsorbent for hazardous gas pollutants due to its physical and chemical properties. This research aims to evaluate the effectiveness of fly ash as an adsorbent in reducing gas pollutants such as CO2, SO2, and NO2, as well as to examine the influence of temperature and material characteristics on adsorption capacity. The results indicate that the maximum adsorption capacity for each gas pollutant is achieved at different temperatures, fly ash demonstrating the highest performance at 150 °C for CO2 adsorption, achieving an efficiency of 94.7%. For SO2 and NO2, the optimum temperatures are 200 °C, with efficiencies of 72.17% and 100%, respectively. This study also emphasizes the importance of selecting the appropriate characteristics of the adsorbent material to enhance adsorption efficiency. This finding has the potential to support the development of more efficient and sustainable air pollution reduction technologies in the future, by utilizing industrial waste such as fly ash as an innovative solution.
Effectiveness of Ammonium Polymer in Improving Floating Treatment Wetland to Reduce Cod From Palm Oil Mill Effluent Hakim, Lukman; Rahayu, Aster; Jamilatun, Siti
JURNAL SAINS NATURAL Vol. 15 No. 1 (2025): Sains Natural
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31938/jsn.v15i1.768

Abstract

Palm oil mill effluent (POME) is a liquid waste from the palm oil industry. This waste contains high levels of organic pollutants and can contribute to environmental pollution. Current technologies effectively degrade these pollutants but are often not environmentally friendly and expensive. Phytoremediation combined with an adsorption system using ammonium polymers is expected to address these challenges. Vetiver grass (Chrysopogon zizanioides) and ammonium polymers have been separately tested and proven capable of degrading pollutants in wastewater. The study began by modifying the planting medium for vetiver grass with gravel:polymer:soil ratio of 3:5:2. The modified net pot was then placed in a floating treatment wetland reactor for POME treatment over a remediation period of 7 days. For comparison, a control experiment was conducted using plants without polymers in the planting medium. The results showed a COD degradation of approximately 75% in POME after treatment. The reduction in COD continued to improve with increasing remediation time, reaching its peak on the seventh day. The modified planting medium also influenced plant growth, as the polymer adsorbed some phosphate and nitrate.
Pembuatan Arang Aktif dari Tempurung Kelapa dan Aplikasinya untuk Penjernihan Asap Cair Siti Jamilatun; Martomo Setyawan
Spektrum Industri Vol. 12 No. 1: April 2014
Publisher : Universitas Ahmad Dahlan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/si.v12i1.1651

Abstract

Arang aktif merupakan senyawa karbon amorph, yang dapat dihasilkan dari bahan-bahan yang mengandung karbon atau dari arang yang diperlakukan dengan cara khusus untuk mendapatkan permukaan yang lebih luas. Arang aktif dapat mengadsorpsi gas dan senyawa-senyawa kimia tertentu atau sifat adsorpsinya selektif, tergantung pada besar atau volume pori-pori dan luas permukaan.. Arang aktif akan dibuat dari arang hasil pirolisis tempurung kelapa.dan diimplementasikan untuk menjernihkan asap cairnya. Adapun langkah yang pertama membuat arang aktif dari tempurung kelapa adalah, membuat arang tempurung kelapa dengan membersihkan tempurung kelapa terlebih dahulu dari bahan-bahan pengotor seperti tanah, kerikil. Kemudian mengeringkannya dibawah sinar matahari, selanjutnya membakar tempurung kering pada drum/bak pembakaran dengan suhu 300-500 0C selama 3-5 jam. Langkah yang kedua adalah arang hasil pembakaran direndam dengan bahan kimia CaCl2 dan ZnCl2 (kadar 25 %) selama 12 sampai 24 jam untuk menjadi arang aktif. Selanjutnya melakukan pencucian dengan air suling/air bersih hingga kotoran atau bahan ikutan dapat dipisahkan. Arang aktif basah dihamparkan pada rak dengan suhu kamar untuk ditiriskan, kemudian dikeringkan dalam oven pada suhu 110 – 8000C selama 3 jam. Suhu aktivasi mempengaruhi kualitas karbon aktif yang terbentuk. Dari uji kualitas karbon aktif yang dilakukan, kualitas karbon aktif yang terbaik diperoleh pada suhu 800oC dengan kadar air 1,3 %, kadar abu 0,60 % memenuhi standar SII 0258-79 dan memiliki daya serap terhadap kadar iod sebesar 580,0 mg/g yang memenuhi standar SNI 06-3730. Penjernihan air limbah rumah tangga, air berwarna menggunakan karbon aktif dari suhu aktivasi 800oC menghasilkan air yang jernih, tidak berbau dan memenuhi pH standar air (7,0-7,5). Key words : Asap cair, tempurung kelapa, pirolisis, arang aktif
Effect of NaOH Concentration on Surface Width and Pore Volume of Silica Gel From Beef Shrain as Adsorbent Nurmutaaqimah; Siti Jamilatun; Aster Rahayu
Sains Natural: Journal of Biology and Chemistry Vol. 15 No. 2 (2025): Sains Natural
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31938/jsn.v15i2.814

Abstract

Rice husk is a natural source of silica that has the potential to be utilized in various applications, especially in industrial wastewater treatment. This study aims to determine the effect of NaOH concentration on the surface area and pore volume of silica gel from rice husk as an adsorbent. The method used is sol-gel with variations in NaOH concentration, namely 1, 2, and 3 M. The process of making silica gel consists of four steps. The silica gel manufacturing process consists of four steps: (1) combustion of rice husk using a furnace, (2) preparation of sodium silicate solution, (3) formation of silica gel through the addition of HCl, and (4) sample testing. Based on XRF analysis, rice husk ash is rich in silica (SiO₂) with a concentration of up to 32.189%, while water content testing shows that the 2 M NaOH concentration provides the largest decrease in water content (96%), higher than the concentrations of 1 M and 3 M, which reach 95%, in line with the results of BET analysis showing optimum conditions at a concentration of 2 M producing the highest surface area (138.720 m²/g) and the largest pore volume (0.673 cm³/g). The 1 M NaOH concentration produced a smaller surface area of 73.869 m²/g with a pore volume of 0.501 cm³/g. Meanwhile, the 3 M NaOH concentration decreased the surface area to 111.626 m²/g with a pore volume of (0.640 cm³/g). Overall, the 2 M NaOH concentration proved to be the most effective in increasing surface area and pore volume. Thus, the resulting silica gel is very suitable for adsorption applications, especially in the treatment of industrial wastewater.
Evaluation of Conventional Methods in Reducing Heavy Metal Concentrations in Industrial Waste Nurmustaqimah; Zahrul Mufrodi; Siti Jamilatun
Indonesian Journal of Chemical Engineering Vol. 3 No. 1 (2025)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/ijce.v3i1.1413

Abstract

The rapid growth of the chemical industry has increased liquid waste containing heavy metals (Cadmium, Zinc, Lead), which threaten ecosystems and human health due to persistence and biomagnification. The handling of these effluents requires specific methods according to the characteristics of the effluents. Electrochemical processes stand out in heavy metal removal efficiency, while adsorption using natural materials (fruit peels, sawdust) offers lowcost effectiveness. Ion flotation utilizes surfactants, although its efficiency depends on operational conditions. Chemical precipitation with lime is a cheap solution to reduce metal solubility, while phytoremediation relies on plants as an environmentally friendly alternative. The selection of methods is based on the type of metal, waste concentration, and economic-environmental factors. The implementation of this appropriate technology is expected to minimize the risk of heavy metal pollution in a sustainable manner.
Co-Authors Adhi Chandra Purnama Adi Permadi, Adi Agus Aktawan, Agus Alfian Ma’arif Amelia, Shinta Anak Agung Istri Sri Wiadnyani Anggun Puspitasari Anisa Salsabila Arief Budiman Arief Budiman Arief Budiman Arief Budiman Arief Budiman Arifah, Zulia Aster Rahayu Aster, Rahayu Auliasari, Putry Ayu Avido Yuliestyan Budhijanto Budhijanto Budhijanto Budhijanto, Budhijanto Budhijanto, B. Defiani Putri Denanti Dhias Cahya Hakika Dhias Cahya Hakika Dhias Cahya Hakika Dita Permata Putri Dwi Astri Ayu Purnama Dwi Astri Ayu Purnama Dwita Sarah Efi Nopianti Eka Noviana Elies Permatasari Eling Widya Suminar Eliyantini Erna Astuti Eva Nurdiana Putri Fajriansya Gonibala Febriani, Annisa Vada Firanita Anggraini H Hadiyanto Hadi Nasbey Hanum, Farrah Fadhillah Hanum, Farrah Hanum Hapsauqi, Iqbal Heidy Oktavia Nisa Ikko Nirwana Luthfiani Ilham Mufandi Ilham Mufandi Ilham Mufandi Ilham Mufandi Ilham Mufandi Ilham Mufandi Imelda Eka Nurshinta Imelda Ika Nurshinta Intan Dwi Isparulita Irfan Maulana Putra Irwan Mulyadi Isparulita, Intan Dwi Joko Pitoyo Joko Pitoyo Joko Pitoyo Joni Aldilla Fajri Karmila Astuti Lee Wah Lim Lia Aslihati Lukhi Mulia Shitophyta Lukhi Mulia Sithopyta Lukman Hakim Lutfiatul Janah M. Idris Martomo Setyawan Maryudi Maryudi Maya Fadilah Muhammad Aziz Muhammad Haryo Setiawan Muhammad Nufail Syafii Muhtadin, Akhmad Sabilal Muthadin , Akhmad Sabilal Mutia Endar Nurhidayah Nabila Fauzi Nafira Alfi Zaini Amrillah Nihanzah, Ardian Surya Putra Nirmalasari, Jiran Nur Aini Aini Nur Kholis Nuraini Nuraini Nurmustaqimah Nurmustaqimah, Nurmustaqimah Nurmustaqimaha, Nurmustaqimaha Nurmutaaqimah Putri, Firanita Angraini Rahayu Aster Rahayu, Aster Ratih Mahardhika Remmo Sri Ardiansyah Resyaldi Pratama Rhomadoni, Firda Rizki Ria Rosania Rifka Alfiyani Ririn Martina Riska Setyarini Riska Utami Melani Putri Riska Utami Melani Putri Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi, R. Rosdamayanti Salsabila, Anisa Setya Wardhana, Budi Setyarini , Riska Shafa Zahira Shinta Amelia Shinta Amelia Shitopyta, Lukhi Mulia Siti Hartini Siti Nurhalizatul Aini Siti Salamah Siti Salamah Soedjatmiko Sofiana, Nurani Sri Ardiansyah, Remmo Sriyana, Ida Suhendra Suhendra Suhendra Taufiqurahman , Muhamad Akmal Totok Eka Suharto Tyas Aji Kurniawan Utaminingsih Linarti, Utaminingsih Veranica Veranica W, Mila Utami Wardhana, Budi Setya Yeni Elisthatiana Yesi Yuniasari Yona Desni Sagita Zahira, Shafa Zahrul Mufrodi Zahrul Mufrodi, Zahrul Zulia Arifah Zulia Arifah