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All Journal POSITRON Jurnal Sains dan Teknologi Jurnal Zeolit Indonesia Biopropal Industri Jurnal Kimia Riset Chimica et Natura Acta INDONESIAN JOURNAL OF APPLIED PHYSICS Indonesian Journal of Pure and Applied Chemistry Jurnal Laut Khatulistiwa AR-RAZI Jurnal Ilmiah Walisongo Journal of Chemistry GERVASI: Jurnal Pengabdian kepada Masyarakat Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Journal of Environmental Science and Sustainable Development Acta Chimica Asiana Abdimas Galuh: Jurnal Pengabdian Kepada Masyarakat Jurnal Abdimas ADPI Sains dan Teknologi Jurnal Teknologi Lingkungan Lahan Basah Jurnal Transformasi Administrasi J-ABDIPAMAS (Jurnal Pengabdian Kepada Masyarakat) Komunita: Jurnal Pengabdian dan Pemberdayaan Masyarakat
Nelly Wahyuni
Universitas Tanjungpura
Religion Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Nursing Physics Public Health Social Sciences Other

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CASSAVA-BASED BIOPLASTIC AS A CARRIER MEDIUM FOR SLOW-RELEASE FERTILIZER Yudi, Yulius; Syahbanu, Intan; Wahyuni, Nelly
Walisongo Journal of Chemistry Vol. 8 No. 2 (2025): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v8i2.23718

Abstract

The rapid nutrient release of conventional fertilizers often leads to resource inefficiency, environmental pollution, and a continuous increase in subsidized fertilizer demand in Indonesia. This study aimed to develop cassava starch (Manihot esculenta Crantz)-based bioplastic as a carrier medium for urea slow-release fertilizer (SRF). The bioplastic was further analyzed for its mechanical properties, biodegradability, and nutrient release efficiency. The research method involved cassava starch preparation, bioplastic fabrication using cassava starch, polyvinyl alcohol (PVA), and glycerol mixtures, followed by testing of water resistance, tensile strength, elongation, Fourier Transform Infrared (FTIR) analysis, and SRF release performance. The results showed that bioplastic containing fertilizer (BP) exhibited higher water absorption, with water resistance of 73.45%, compared to bioplastic without fertilizer (BP0), which showed 67.44% water resistance. Mechanical testing revealed that bioplastic without fertilizer had a higher tensile strength (0.99 MPa) than bioplastic containing fertilizer (0.50 MPa). Although the tensile strength did not meet the Indonesian National Standard (SNI ISO 527-1:2016), which requires values between 24.7–302 MPa, the elongation properties of both samples met the standard range of 21–220%. Functional group analysis using FTIR indicated changes in the chemical structure of the bioplastic due to fertilizer addition, evidenced by a shift in the FTIR absorption peak at 2164.13 cm⁻¹, corresponding to the isocyanate group. The urea slow-release test conducted over six days showed a nutrient release efficiency of 66% for the bioplastic-embedded urea fertilizer (BP) compared to the direct use of urea fertilizer. Overall, this study demonstrates that cassava starch-based bioplastic has strong potential as an efficient carrier material for SRF applications.
Kinetika Adsorpsi Antibiotik Tetrasiklin Oleh Komposit TiO2-Ni/PVA/Serat Sabut Pinang Teraktivasi Povi, Povi; Wahyuni, Nelly; Zaharah, Titin Anita
Jurnal Teknologi Lingkungan Lahan Basah Vol 14, No 1 (2026): January 2026
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtllb.v14i1.98383

Abstract

Environmental pollution from tetracycline antibiotics has become a serious concern because of their stability and tendency to bind to Ca2+ and other ions, leading to frequent detections in wastewater, surface water, groundwater, sludge, and sediments. One effective method to address this issue is adsorption using TiO2-Ni-based composite materials. This study aims to investigate the effect of variations in polyvinyl alcohol (PVA) mass on the adsorption capacity and rate of tetracycline in TiO2-Ni/PVA/activated areca fiber composites. TiO2-Ni/activated areca fiber was composited with PVA at mass ratios of 1, 2, and 3 and then tested in a tetracycline solution for 5 hours. Kinetic data were analyzed using first-order, second-order, pseudo-first-order, and pseudo-second-order models. The results showed that increasing PVA mass enhanced the adsorption percentage, with the highest value observed at 3 grams of PVA, reaching 12.60% after 5 hours of contact. The kinetic pattern of TiO2-Ni/PVA/activated areca fiber composites with 1 and 2 grams of PVA followed the pseudo-first-order adsorption model. In contrast, the composite with 3 grams of PVA tended to follow the first-order adsorption model.
Pelatihan Penggunaan Aplikasi Pendukung Publikasi Karya Tulis Ilmiah untuk Peningkatan Kompetensi Guru Kimia Sekolah Menengah Umum di Kabupaten Kubu Raya Andi Hairil Alimuddin; Endah Sayekti; Gusrizal Gusrizal; Ajuk Sapar; Rudiyansyah Rudiyansyah; Titin Anita Zahara; anis shofiyani; Nelly Wahyuni; Thamrin Usman; Risa Nofiani; Ari Widiyantoro; Agus Wibowo; Warsi Kurnia Rahayu; Yoga Pratama; Titik Lestari; Tria Susanti; Tariz Zharfan ME; Aderiya Munika
KOMUNITA: Jurnal Pengabdian dan Pemberdayaan Masyarakat Vol 5 No 2 (2026): Mei
Publisher : PELITA NUSA TENGGARA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.60004/komunita.v5i2.595

Abstract

A workshop on the use of supporting applications for the publication of scientific papers has been carried out for Chemistry subject teachers. This activity is in collaboration with the Chemistry Subject Teachers' Conference (MGMP) of Kubu Raya Senior High Schools. This activity aims to utilize the application for compiling bibliographies and checking the similarity of scientific papers to facilitate the writing and publication of scientific papers. The method of implementing the Community Service (PKM) program is through: structural, participatory and instructional approaches; demonstration; practice and mentoring, and evaluation. The results obtained in the form of implementing a one-day workshop activity by presenting research method materials, library search tips and utilization of the Mendeley application, plagiarism checking applications and tips for avoiding plagiarism.The workshop was conducted in the form of a presentation and direct practice of using the application. In addition to being accompanied by the presenters, participants are also accompanied by instructors who have been prepared by the committee so that the activity can run smoothly. In order to increase the interest and attention of participants to participate in the activity, the organizing committee provides door prizes for participants who ask and answer quizzes from the presenters. This method can also be used as an evaluation of the level of understanding of participants in addition to the evaluation in the form of questionnaires distributed after the activity to measure the success of this PKM activity. Based on the questionnaires distributed, participants thought that this activity was very helpful in compiling scientific papers so that it was very useful for participants. Most participants considered that the facilities and training time were in accordance with those conveyed by the presenters who were in accordance with their fields. Overall, it can be concluded that the objectives of implementing this PKM have been achieved.
Synthesis and Characterization of Adsorbent Magnetic Kaolin Harlia, Harlia; Wahyuni, Nelly
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 15, No 2 (2025): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v15i2.93849

Abstract

Kaolin as an adsorbent has difficulties separating it from the adsorbate solution because it requires centrifugation and precipitation methods, which require significant costs, time, and energy. Modification of kaolin with magnetite was carried out to increase the effectiveness of adsorption from the paracetamol solution. Kaolin-magnetite (KM) adsorbent was made by combining activated kaolin and Fe(III)/Fe(II) solution with a mole ratio of 2:1 using the coprecipitation method. The resulting activated kaolin, magnetite, and kaolin-magnetite were characterized using X-ray Fluorescence (XRF), X-ray Diffractometer (XRD), Fourier Transform Infrared (FTIR), Gas Sorption Analyzer (GSA), and Vibrating Sample Magnetometer (VSM). The presence of magnetite makes it easier to separate KM from the paracetamol solution, with 97.17% of KM being taken by the magnetic rod.
Co-Authors Aderiya Munika Agus Wibowo Agustiawan, Deri Ajuk Sapar Alfiyani, Hani Amanda, Ferdian Rizki Andi Hairil Alimuddin Andi Hairil Alimuddin Angelina, Dina Anis Shofiyani Aprilianti, Wirna Arfida, Khaizurani Ari Widiyantoro Ayyash, Muhammad Yahya Azhar, Annisa Sylvania berta juniarty antomy Dina Angelina Endah Sayekti Erma Maruni Evi Gusmayanti Febriyanti, Shafira Viana Gusrizal Gusrizal Harlia, Harlia Hikmah, Miftachul Imelda H Silalahi Imelda H. S., Imelda H. Imelda Hotmarisi Silalahi Irwan Irwan Jamhir Islami Jumiati Jumiati Kiki Prio Utomo Krisnanti, Gendis Yayi Lia Destiarti M Agus Wibowo Mardhatilla Marpaung, Maria Oktavia Putri Mellisa Nurul Safitri Muhammad Pramulya, Muhammad Nurlina Nurlina Nurlina, Nurlina Panaya, Gabriela Yenti Landang Povi, Povi Putri, Lavena Imelda Rahayu, Warsi Kurnia Ridho Brilliantoro Risa Nofiani Risa Nofiani Risya Sasri Rizky Al Ayyubi, Muhammad Rudiyansyah Rudiyansyah Rudiyansyah Rudiyansyah Rudiyansyah Rudiyansyah Sasa Widianti Shofiyani, Anis Simamora, Cico Jhon Karunia Sugandi, Didiek Sutarno Sutarno Syah, Nur Rikswan Syahbanu, Intan Syaifurrahman Syaifurrahman Tariz Zharfan ME Thamrin Usman Thamrin Usman Thamrin Usman Titik Lestari Titin Anita Zahara Titin Anita Zahara, Titin Anita Titin Anita Zaharah Tria Susanti Utomo, Kiki Prio Vebriyanti, Lo Mei Ly Verry Andre Fabiani Warsi Kurnia Rahayu Wibowo, Muhamad Agus Wijayanto, Ericco Winda Rahmalia Yateman Arryanto Yoga Pratama Yossy Yossy Yudi, Yulius Yulistya Vidyaning Maulidya Zaharah, Titin Anita