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All Journal Teknika Jurnal Bahan Alam Terbarukan CHEMICA Jurnal Teknik Kimia Jurnal Dinamika Penelitian Industri Jurnal Teknologi Agroindustri Journal Of Chemical Process Engineering (JCPE) JURNAL KONVERSI Jurnal Distilasi Jurnal Redoks Martabe : Jurnal Pengabdian Kepada Masyarakat PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Journal of Engineering and Scientific Research (JESR) Jurnal Tekno Jurnal Riset Teknologi Industri PUBLIKASI PENELITIAN TERAPAN DAN KEBIJAKAN Majalah Tegi International Journal Of Science, Technology & Management (IJSTM) Aptekmas : Jurnal Pengabdian Kepada Masyarakat Journal Of Chemical Process Engineering International Journal of Information Engineering and Science Advance Sustainable Science, Engineering and Technology (ASSET)
Kiagus Ahmad Roni
Teknik Kimia, Universitas Muhammadiyah Palembang
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Changes in the Physical and Mechanical Properties of Clay Soil Due to Stabilization with Lime Ferly Indra Putra; Kiagus Ahmad Roni; Sri Martini
International Journal of Information Engineering and Science Vol. 2 No. 2 (2025): May : International Journal of Information Engineering and Science
Publisher : Asosiasi Riset Teknik Elektro dan Infomatika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62951/ijies.v2i2.295

Abstract

Clay soil stabilization is a crucial process to enhance the soil's bearing capacity and stability, making it more suitable for construction purposes. Stabilizing clay soils improves their mechanical properties, reduces swelling, and increases their load-bearing capacity, which is essential for the foundation of various structures. This study aims to investigate the effect of lime (CaO) addition and curing time on the physical properties of clay soil, particularly focusing on unconfined compressive strength (qu) and overall soil stability. The experimental methodology involved applying different percentages of lime content (ranging from 3% to 7%) and varying curing times (7, 14, and 28 days). The soil samples were tested for their unconfined compressive strength after each combination of lime content and curing duration. The results indicated that the addition of 5% lime (CaO) and curing for 14 days led to a significant improvement in the unconfined compressive strength by 153.3%, compared to the untreated clay soil. Furthermore, increasing the curing time beyond 14 days did not show substantial improvements in strength, suggesting that 14 days is the optimal curing period for this combination. The study also highlighted that the lime treatment not only enhanced the mechanical properties but also reduced the plasticity of the clay, making it more stable and easier to handle during construction. Based on these findings, it can be concluded that the appropriate combination of lime content and curing time plays a significant role in improving the stability of clay soils. This research provides valuable insights into optimizing soil stabilization techniques, offering an effective solution for enhancing soil properties for engineering applications
Pembuatan Bioplastik dari Sekam Padi Menggunakan Sorbitol sebagai Plasticizer Hakim, Dimas Tirtayasa Rachman; Roni, Kiagus Ahmad
TEKNIKA Vol. 19 No. 3 (2025): Teknika September 2025
Publisher : Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.17042345

Abstract

Penelitian ini bertujuan untuk mengembangkan bioplastik biodegradable yang berbahan dasar sekam padi, dengan penambahan kitosan dan sorbitol sebagai bahan penguat dan plasticizer. Sekam padi mengandung selulosa yang dapat diekstraksi dan digunakan untuk pembuatan bioplastik yang ramah lingkungan. Proses pembuatan dimulai dengan ekstraksi selulosa dari sekam padi, dilanjutkan dengan pencampuran kitosan dan sorbitol dalam larutan asam asetat 2%. Bioplastik yang dihasilkan diuji untuk mengetahui sifat mekanik seperti kekuatan tarik (tensile strength), elongasi, dan daya serap air (swelling). Hasil penelitian menunjukkan bahwa penambahan kitosan meningkatkan kekuatan tarik bioplastik, sementara sorbitol meningkatkan kelenturan dan fleksibilitasnya. Formulasi optimal diperoleh pada konsentrasi 1,5 g kitosan dan 4,0 mL sorbitol, yang menghasilkan bioplastik dengan ketahanan terhadap air yang baik, kekuatan tarik yang memadai, dan elongasi yang cukup tinggi. Penelitian ini menunjukkan bahwa sekam padi dapat dijadikan bahan baku yang efektif untuk pembuatan bioplastik yang ramah lingkungan dan berkelanjutan.
Barium Removal from Produced Water Using RCC-Based Ceramic Adsorbent: Fixed-Bed Column Adsorption Herawati, Netty; Nasir, Subriyer; Roni, Kiagus Ahmad; Karim, Muhammad Arif
Advance Sustainable Science Engineering and Technology Vol. 7 No. 4 (2025): August-October
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v7i4.2399

Abstract

This study focuses on the removal of barium ions (Ba²⁺) from produced water, a common challenge in industrial wastewater treatment due to barium’s toxicity and scaling potential. To address this, the research introduces a novel ceramic composite adsorbent formulated from natural clay and residue catalytic cracking (RCC) spent catalyst, combining low cost, sustainability, and enhanced adsorption performance. The main objective is to evaluate the adsorption efficiency of this composite in a fixed-bed column system under varying operational conditions, while also modeling its dynamic behavior. Produced water with an initial barium concentration of 0.58 mg/L (pH 8.8) was fed in up-flow mode at flow rates of 6, 7, and 8 mL/min using a peristaltic pump. Effluent samples collected over 180 minutes were analyzed by UV- Vis. spectrophotometry. Results showed that lower flow rates increased contact time and improved adsorption efficiency, with breakthrough delayed to ~210 minutes at 6 mL/min compared to 160 minutes at 8 mL/min. Breakthrough modeling indicated that the Thomas model best represented the data (R² ≥ 0.95), while the Yoon–Nelson model reliably predicted 50% breakthrough time. This work demonstrates that clay–RCC ceramic composites are effective, low-cost, and sustainable adsorbents.
Sosialisasi dan Pendampingan Solar PV Rooftop sebagai Sumber Energi Listrik Cadangan di Musholah Baiturrohim Kelurahan Plaju Darat Kecamatan Plaju Kota Palembang: Socialization and Mentoring of Solar PV Rooftop as a Backup Source of Electricity in Baiturrohim Musholah Plaju Darat Village, Plaju District, Palembang City Roni, Kiagus Ahmad; Sofiah, Sofiah; Afif, Muhammad Faris; Puteri, Delita Mustika; Fadilah, Fadilah
PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 10 No. 11 (2025): PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat
Publisher : Institute for Research and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/pengabdianmu.v10i11.9846

Abstract

Solar photovoltaic (PV) technology, which converts sunlight into electrical energy, is an environmentally friendly applied technology. PV installation on the roof of a building, also known as Rooftop PV, is used not only as a heater but also as an alternative source of electrical energy for a building. Rooftop PV on the Mushola Baiturrohim is used as a backup source of electrical energy when PLN cannot supply voltage. The installed 100 Wp solar photovoltaic system is capable of providing power to a setup consisting of 3 lamps, each with a wattage of 15, and a fan with a diameter of 12 inches, for approximately 2.5 hours. Socialization of the assembly and maintenance of the Rooftop PV system is also carried out for the management of the prayer room and the surrounding community, as a means of transferring renewable energy knowledge that all can utilize.
Making Virgin Coconut Oil (VCO) With Enzymatic Method Using Pineapple Hump Extract Roni, Kiagus Ahmad; Rifdah, Rifdah; Melani, Ani; Amina Reformis I, Aisyah; Sri, Sri Martini
International Journal of Science, Technology & Management Vol. 3 No. 3 (2022): May 2022
Publisher : Publisher Cv. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46729/ijstm.v3i3.516

Abstract

Indonesia is one of the largest coconut producer countries providing a higher opportunity for producing various products derived from coconut fruit including virgin coconut oil (VCO). The enzymatic method can be chosen as part of VCO production as it offers higher yields. This work then utilized the bromelain enzyme which could hydrolyze protein leading to better oil-water separation in the coconut milk emulsion. Around 200 ml of coconut milk and several variables such as incubation time (24 hours, 36 hours, 48 ??hours, 60 hours), and the concentration of pineapple hump extract (5%, 10%, 15%, and 20%) were chosen as investigated parameters in this work. The experimental procedure for VCO production followed Indonesia national standard (SNI 7381: 2008). It was found that the incubation time of 24 hr and the concentration of pineapple hump extract 5% as the optimum condition. These parameters resulted in VCO product having specific gravity 0.9150 gr/cm3, free fatty acids 0.133%, and the acid number 1.8 meq/kg which has met Indonesia quality standard for VCO production.
APLIKASI WHATSAPP SEBAGAI MEDIA ALTERNATIF UJIAN ONLINE DI SIT MUSH’AB BIN UMAIR Barlian, Taufik; Roni, Kiagus Ahmad; Sofiah, Sofiah; Apriani, Yosi
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 4, No 1 (2021): Martabe : Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v4i1.268-273

Abstract

Distance learning causes teachers to think creatively so that the teaching and learning process continues as it should. In addition, various platforms and media for online learning are still not widely known by teachers. The Whatsapp application is an application that is already widely used. In this application, it is possible to form groups that can gather many people to be able to chat with each other and exchange information that allows the delivery of messages in groups besides delivering messages individually. The purpose of this service is so that teachers can make maximum use of the Whatsapp media as a distance learning facility. The method in this service of AbdiMas team took the initiative to conduct a one day coaching clinic using the Whatsapp application as a means of evaluating student learning to SIT Mush'ab bin Umair teachers. The conclusion of this dedication activity is that this community service activity is felt to be very beneficial for the SIT Mush'ab bin Umair teachers. In part, the limitations of online learning facilities and infrastructure can be overcome by using Whatsapp. The use of Whatsapp as an online exam means is considered relatively cheap with a wide reach, easy to use, especially for most of the students of SIT Mush'ab bin Umair who are still in grades 1 and 2.
Co-Authors afif, muhammad faris Amina Reformis I, Aisyah Ani Melani Apriani, Yosi Arief Prasetyo Bela Marselia Dian Kharisma Dewi Eddy Hamid Elfidiah Elfidiah Elfidiah, Elfidiah Erna Y uliwati Erna Yuliwati Evy Kurniati Fadilah Fadilah, Fadilah Ferly Indra Putra Hakim, Dimas Tirtayasa Rachman Indra Pratama Karim, Muhammad Arif Kharismadewi, Dian Legiso, Legiso Maulidi, Muhammad Delika Miftahul Jannah, Deri Muhammad Roy Tri Handono Mustakim, Imam Netty Herawati Netty Herawati Netty Herawati Panji Nugroho, Dimas Puteri, Delita Mustika Rahman, Arman Aulia Rahman, Arman Aulia Rifdah, Rifdah Rifdah, Rifdah RR. Ella Evrita Hestiandari Sofiah Sofiah Sofiah Sofiah Sri Martini Sri Martini Sri Martini Sri, Sri Martini Subriyer Nasir Taufik Barlian Tri Amrullah Tri Susanto Tri Susanto Tri Susanto Tri Susanto Yudha Widaputra Zahrul Mufrodi, Zahrul