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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 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)
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.
Co-Authors Agustiawan, Deri Ajuk Sapar Alfiyani, Hani Amanda, Ferdian Rizki 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 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 Simamora, Cico Jhon Karunia Sugandi, Didiek Sutarno Sutarno Syah, Nur Rikswan Syahbanu, Intan Syaifurrahman Syaifurrahman Thamrin Usman Thamrin Usman Titin Anita Zahara, Titin Anita Titin Anita Zaharah Utomo, Kiki Prio Vebriyanti, Lo Mei Ly Verry Andre Fabiani Wibowo, Muhamad Agus Wijayanto, Ericco Winda Rahmalia Yateman Arryanto Yossy Yossy Yudi, Yulius Yulistya Vidyaning Maulidya Zaharah, Titin Anita