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All Journal Al-Kimia Magnetic: Research Journal of Physics and It’s Application Al-Khidmah Jurnal Pengabdian Masyarakat Jurnal Ilmiah Berkala: Sains dan Terapan Kimia
Pebriyanto, Yunus
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Religion Humanities Astronomy Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Languange, Linguistic, Communication & Media Physics Social Sciences

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The Potential of Ironwood as an Activated Carbon Adsorbent for Heavy Metal Mercury (Hg) Using the Pyrolysis Method Pereiz, Zimon; Oksal, Efriyana; Chuchita, Chuchita; Sylvani, Miranti Maya; Pebriyanto, Yunus
Jurnal Sains dan Terapan Kimia Vol 19, No 1 (2025)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v19i1.20957

Abstract

This study focuses on the utilization of ironwood as an activated carbon adsorbent to remove heavy metal mercury (Hg). The background of the problem includes mercury pollution from various industrial sources and its harmful impacts on the environment and human health. The purpose of this study was to develop an effective method for adsorbing mercury using natural ironwood materials. The research method involves the synthesis of activated carbon through pyrolysis and chemical activation processes, followed by a series of adsorption tests on mercury with variations in pH conditions, contact time, and acid concentration. The research data showed that the optimum adsorption capacity was achieved at a mercury concentration of around 500 ppm, with high adsorption efficiency at pH 1 and a contact time of 80 minutes. The results also showed that the adsorption kinetics followed a second-order model with a rate of 0.017119 g/mg.min. In conclusion, the mercury adsorption process using activated carbon from ironwood followed the Langmuir isotherm model, with an adsorption capacity of 63.036 mg/g, indicating that the adsorbent had been successfully synthesized and had an effective ability to remove mercury.
The Potential of Jackfruit Wood as Activated Carbon for Adsorption of Heavy Metal Mercury (Hg) through Pyrolysis Method Zimon Pereiz; Chuchita; Oksal, Efriyana; Maya Sylvani, Miranti; Irawan, Ahmad; Pebriyanto, Yunus; Hairiah, Rusliananur; Eka Jaya Prastiti, Arini; Berlisnora Dasilva, Caroline; Anatasya, Violina; Prisnanda, Risky
Al-Kimia Vol 13 No 1 (2025): JUNE
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

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Abstract

Water pollution caused by heavy metal mercury is a serious problem today. This study aims to utilise jackfruit wood waste as a natural adsorbent in overcoming the problem of water pollution due to heavy metal mercury. The methods in this research include jackfruit wood preparation, hydrochar synthesis through pyrolysis, hydrochar activation, wastewater preparation, batch adsorbent optimum conditions, and dynamic adsorption process (Fixed-Bed Column). The results showed that the optimum adsorption condition was reached at 0.4 M HCl concentration, pH 3 and 80minutes contact time. The study also showed that the adsorption kinetics followed a second-order pseudo model with a rate constant of 1.712 x 10-2 g/mg.min. The research data also showed conformity with the Langmuir isotherm model, with an adsorption capacity of 63.036 mg/g. The results of this study prove that jackfruit wood waste is effectively used as raw material for making activated carbon for wastewater treatment applications in removing heavy metal mercury.
Implementasi Sistem PLTS untuk Kebutuhan Listrik Pelaku Usaha Ternak Ikan Toman Rahayu Basani, Yuniarta; Pebriyanto, Yunus; Decenly, Decenly
Al-Khidmah Jurnal Pengabdian Masyarakat Vol. 6 No. 1 (2026): JANUARI-APRIL
Publisher : Institute for Research and Community Service (LPPM) of the Islamic University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56013/jak.v6i1.5090

Abstract

Limited access to electricity remains a major challenge for fisheries enterprises located in remote areas, including Ternak Ikan Toman Rahayu, which operates floating cages along the Pager River in Palangka Raya. This condition reduces operational efficiency and productivity due to the absence of a reliable power supply. Therefore, this community service program aimed to implement an off-grid Solar Power System (PLTS) as a sustainable and independent energy solution. The implementation method consisted of field observation and needs assessment, installation of the off-grid PLTS, training on system operation and maintenance, and evaluation through in-depth interviews. The results indicate that the implemented PLTS successfully provides a stable electricity supply for lighting and work equipment, while also enhancing the partner’s knowledge and independence in managing renewable energy systems. The off-grid PLTS implementation effectively supports business sustainability and promotes the utilization of renewable energy within the community.
Rancang Bangun Prototipe Sistem Pencitraan Bawah Tanah dengan Metode Electrical Resistence Tomography Pebriyanto, Yunus; Wilson Jefriyanto; Yoan Theasy; Yunita Enzelina Silaban; Salsa Ayudhia Pratama
Magnetic: Research Journal of Physics and It’s Application Vol. 6 No. 1 (2026): Magnetic: Research Journal of Physics and It’s Application
Publisher : Program Studi Fisika - Universitas San Pedro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59632/magnetic.v6i1.755

Abstract

Electrical Resistivity Tomography (ERT) is a geophysical method used to image subsurface structures based on the distribution of material resistivity by injecting electrical current and measuring the resulting potential at the surface. Although widely applied in subsurface exploration, the use of ERT in academic environments is still limited due to the high cost of commercial equipment. Therefore, this study aims to design and develop a laboratory-scale prototype of a subsurface imaging system based on the ERT method as an educational and practical learning tool. The research employed a Research and Development (R&D) method combined with an experimental approach, including the stages of design, fabrication, testing, and calibration of the prototype. Experimental measurements were conducted on homogeneous soil media and soil media with artificial anomalies using Wenner and Wenner–Schlumberger configurations. The acquired data were processed using RES2DINV software to produce two-dimensional subsurface images. The results indicate that the developed prototype is capable of detecting resistivity anomalies effectively, although relatively high inversion errors were observed due to laboratory-scale limitations. Overall, the proposed ERT prototype is suitable as a supporting tool for geoelectrical learning and subsurface exploration practicum.
Co-Authors Ahmad Irawan, Ahmad Anatasya, Violina Basani, Yuniarta Berlisnora Dasilva, Caroline Chuchita Chuchita, Chuchita Decenly, Decenly Eka Jaya Prastiti, Arini Hairiah, Rusliananur Maya Sylvani, Miranti Oksal, Efriyana Prisnanda, Risky Salsa Ayudhia Pratama Sylvani, Miranti Maya Wilson Jefriyanto Yoan Theasy Yunita Enzelina Silaban Zimon Pereiz