Hermida, Lilis and Agustian, Joni (2018) Utilization of Sugarcane Bagasse Bottom Ash: A Renewable Silica Source for the Synthesis of Slow Release Urea Fertilizers. In: 13th Joint Conference on Chemistry, 7-8 September 2018, Semarang.

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Abstract

Slow release urea fertilizer (SRUF) need to be developed to reduce environmental pollution and to minimize loss of nutrient leaching due to the application of conventional urea fertilizer. In this study, various SRUF’s with different urea release behaviours were synthesized using silica derived from sugarcane bagasse bottom ash which is solid waste of sugarcane industry. Silica was extracted from bagasse bottom ash using H2SO4 solution and followed by drying at 105°C and and then calcinations at 550°C. In the SRUF preparation, a certain amount of silica (9,2 – 9.8 g) was mixed with a certain amount of corn starch (0.2 - 0.8 g). Then, the mixture was added to melted urea (90 g). After that, the admixture was extruded to produce SRUF in the form of pellet and then dried at 50°C. Then, SRUF was characterized through SEM-EDX and FTIR analysis. as a comparison, conventional urea fertilizer was also characterized. Static release experiment was conducted to observe urea desorption mechanism of the SRUF. It was found that the release of urea in the SRUF was generally much slower compared conventional urea fertilizer. SRUF-4 using silica (9.2 g), corn starch (0.8) and urea (90 g) in the preparation required the longest time to completely release urea. SRUF-4 release mechanism was non-Fickian Diffusion (Anomalous Transport) with desorption rate model of Y = 0.00665504t°.4757.

Item Type: Conference or Workshop Item (Speech)
Subjects: T Technology > TP Chemical technology
Divisions: Fakultas Teknik (FT) > Prodi Teknik Kimia
Depositing User: Dr. LILIS HERMIDA
Date Deposited: 06 Nov 2018 03:08
Last Modified: 06 Nov 2018 03:08
URI: http://repository.lppm.unila.ac.id/id/eprint/9536

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