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All Journal Unesa Journal of Chemistry
Ni Ketut Karina Sari
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology

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KAJIAN KARAKTERISTIK FISIK PUPUK GRANUL UREA-BIOCHAR BAMBU BERSELAPUT ASAM AKRILAT Ni Nyoman Ari Putri Murtiyah; Ni Ketut Karina Sari; Dewa Ayu Ari Febriyanti; I Wayan Dirgayana
Unesa Journal of Chemistry Vol. 15 No. 1 (2026): Vol 15 No 1
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Surabaya State University, located at Jl Ketintang, Surabaya, East Java, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ujc.v15n1.p7-13

Abstract

Nitrogen use efficiency in conventional urea fertilizers remains low due to nutrient loss through leaching and volatilization. This study aims to develop and characterize a slow-release fertilizer (SRF) based on a bamboo biochar matrix coated with acrylic acid polymer. The fertilizers were formulated into granules using coating and matrix methods with urea proportions of 25%, 30%, and 35%. Characterization included physical properties, surface morphology, and elemental composition using Scanning Electron Microscopy-Energy Dispersive X-Ray Spectroscopy (SEM-EDS). The results showed that the produced granules were dominated by sizes of 2–5 mm, ranging from 80.17% to 92.50%, complying with the Ministry of Agriculture Regulation (Permentan) No. 01 of 2019. SEM analysis confirmed that acrylic acid successfully encapsulated the pores of the bamboo biochar and urea, forming a physical barrier structure that extends the nutrient diffusion path. EDS spectra verified the successful impregnation of urea into the matrix, with Nitrogen (N) retention of 41.15% for the coating method and 27.97% for the matrix method. The presence of bamboo biochar micropores and the polymer layer aligns with slow-release principles, enhancing agronomic efficiency while minimizing environmental impacts.
Co-Authors Dewa Ayu Ari Febriyanti Ni Nyoman Ari Putri Murtiyah