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L.Urip Widodo, Yohandrik Novel Karaman
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Chemical Activation of Coal Fly Ash Waste for Adsorbent Production Mardianingrum, Putri; Ridhwan Aprilian, Muhammad; Sani; Edra Nugraha, Reva; Karaman, Novel
AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Vol. 9 No. 3 (2025)
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy (SAFE-Network)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29165/ajarcde.v9i3.828

Abstract

Coal fly ash is a significant byproduct of coal combustion that poses environmental risks if not properly utilized. Rich in aluminosilicates and naturally porous, fly ash can serve as an environmentally friendly, low-cost adsorbent for industrial wastewater treatment. This study aims to investigate the effect of HCl concentration and activation time on the characteristics and adsorption capacity of coal fly ash as an adsorbent. Chemical activation with HCl was performed to enhance adsorption capacity by dissolving impurities, increasing pore volume, increasing surface area, and improving silica content while reducing aluminium levels. The results indicated that the HCl-activated fly ash exhibited the highest iodine adsorption value of 778.38 mg/g, exceeding the SNI standard of 750 mg/g, demonstrating excellent adsorption performance. XRF analysis revealed 78.1% SiO? and 3.96% Fe?O? contents, suggesting that HCl-activated fly ash has great potential as an effective, economical, and sustainable adsorbent for industrial wastewater treatment. Contribution to Sustainable Development Goals (SDGs):SDG 6: Clean Water and SanitationSDG 9: Industry, Innovation, and InfrastructureSDG 12: Responsible Consumption and ProductionSDG 13: Climate ActionSDG 14 : Life Below Water
Inhibition of Barium Sulfat Crystal Formation in a Batch Method Crystallizer in the Presence of Cu and Zn Karaman, Novel; Giritama Wibowo, Hendi; Aqil, Ubaidillah; Jamari, Jamari; Bayuseno, A.P.; Suprianti, Lilik
International Journal of Science, Technology & Management Vol. 4 No. 3 (2023): May 2023
Publisher : Publisher Cv. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46729/ijstm.v4i3.824

Abstract

Deposits of barium sulfate are a common issue in the oil and gas industry. The presence of these crystals impacts oil and gas production, causing technical problems such as inhibiting flow rate, increasing pressure in the pipe, and causing the pipe to break and be damaged. The results of this study show the formation of barium sulfate (BaSO4) crystals with the batch crystallizer method at 300 °C under the influence of the stirring rotation speed (0 rpm, 120 rpm, 240 rpm, 360 rpm, 480 rpm) and the additive concentration (0 ppm, 5 ppm, 10 ppm, 15 ppm, 2atm). In this study, the BaSO4 crystallization experiment was performed in a glass beaker using a magnetic stirrer with a stirring rotation speed to react BaCL2 and Na2SO4. The results demonstrated that adding zinc chloride (ZnCl2) and copper (ii) chloride (CuCl2) additives reduced the mass of crystals formed. The amount of barium sulfate scale that forms can be affected by the rotational speed of the stirrer. According to SEM analysis, the crystal morphology of BaSO4 was orthorhombic, indicating that this crystal shape was typical of barite crystals. While XRD analysis confirmed the formation of barium sulfate (barite) crystals, it also demonstrated that the crystals formed were solid barite crystals.
Effect of Absorbent Type on the Absorption Durability of Biogas Purification Muhammad, Fitrah Guna; Ibadurrahman, Muhammad Watsieq; Yogaswara, Rachmad Ramadhan; Karaman, Novel; Suprihatin, Suprihatin; Sani, Sani
AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Vol. 10 No. 1 (2026)
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy (SAFE-Network)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29165/ajarcde.v10i1.873

Abstract

Biogas purification is essential to increase methane concentration and reduce impurities such as carbon dioxide and hydrogen sulfide, which decrease calorific value and cause corrosion in energy systems. This study evaluates the effect of absorbent solution type on biogas purification efficiency and absorption durability using chemical absorption methods. Alkaline solutions including sodium hydroxide (NaOH), potassium hydroxide (KOH), calcium hydroxide (Ca(OH)?), and their binary mixtures were employed at a concentration of 20% (w/v). Biogas derived from molasses fermentation was passed through bubble column absorbers and analysed using an Orsat apparatus over 2–10 days of absorption. Results show that all absorbents significantly increased methane concentration while reducing CO? and H?S. The highest methane concentration of 86.75% was achieved using KOH on day four, exceeding the Indonesian biogas quality standard (SNI 8019:2014). Absorbent saturation occurred after approximately six days, indicated by declining purification performance. These findings confirm that chemical absorption using alkaline solutions is effective for biogas upgrading, with KOH demonstrating the best overall performance and durability. Contribution to Sustainable Development Goals (SDGs):SDG 7: Affordable and Clean EnergySDG 15: Life on Land
Co-Authors A.P. Bayuseno Ahmad Khairul Faizin Andini, Atika Aqil, Ubaidillah Atika Andini Billah, Mu’tasim DWI LESTARI, WAHYU Edahwati, Wahyu Dwi Lestari Edra Nugraha, Reva Faizin, Ahmad Khairul Fitriasari, Rima Galih Suci Widyanto Giritama Wibowo, Hendi Hidayat, Rifqi Rahman Husna Zaka Anshori Ibadurrahman, Muhammad Watsieq Issafira, Radissa Dzaky J. Jamari Kamaliatul Fajria Lucky Indrati Utami Luluk edahwati Luluk Edahwati Mardianingrum, Putri Mu'tasim Billah Muhammad, Fitrah Guna Nana Dyah S Nana Dyah Siswati, Anwar Zain and Mohammad Ndaru Adyono Ndaru Adyono, Ndaru Puspa Sari, Tria Radissa Dzaky Issafira Radissa Dzaky Issafira Ridhwan Aprilian, Muhammad Rifaldi, Kornelius Rima Fitriasari Sani Sani Sari, Tria Puspa Silvana Dwi Nurherdiana SRIE MULJANI Suprianti, Lilik Suprihatin Suprihatin Sutiyono Titi Susilowati Titi Susilowati Tria Puspa Sari Wahyu Dwi Lestari Wahyu Dwi Lestari Wahyu Dwi Lestari Edahwati Widayanto, Galih Suci Wiliandi Saputro Wiraya, Wira Arta Yogaswara, Rachmad Ramadhan