SINTESIS, KARAKTERISASI, DAN UJI PERFORMA S/CRF PVA/BORAT/GRACILARIA/CHARCOAL-CaCO3 TERSISIPI KCl

Bilqis Aprilia Salima, - (2024) SINTESIS, KARAKTERISASI, DAN UJI PERFORMA S/CRF PVA/BORAT/GRACILARIA/CHARCOAL-CaCO3 TERSISIPI KCl. S1 thesis, Universitas Pendidikan Indonesia.

Abstract

Penerapan pupuk yang tepat dapat meningkatkan produktivitas pertanian, namun penggunaan pupuk secara berlebihan dapat mengurangi efisiensi dan berdampak negatif terhadap lingkungan. Pupuk pelepasan lambat/terkendali (Slow/Controlled-Release Fertilizer, S/CRF) dianggap sebagai solusi yang baik untuk meningkatkan efisiensi penggunaan pupuk. S/CRF bekerja dengan melepaskan nutrisi secara perlahan, sehingga mengurangi kehilangan nutrisi ke lingkungan dan meningkatkan efektivitas penggunaan pupuk. Kajian pada pengembangan S/CRF menunjukkan bahwa gel yang berbahan dasar PVA/Borat/Glacilaria memiliki potensi yang baik untuk dikembangkan lebih lanjut. Pada sisi lain, charcoal merupakan bahan yang umum digunakan oleh petani untuk bahan tambahan pemupukan. Pada penelitian ini, dipelajari bagaimana charcoal memberikan ubahan terhadap karakteristik dan performa agrokimia S/CRF lembaran hidrogel PVA/Borat/Gracilaria/Charcoal dan performa granula dengan campuran CaCO3 dan KCl yang dilapisi gel PVA/Borat/Gracilaria/charcoal serta biodegradabilitas hidrogel S/CRF PVA/Borat/Gracilaria/Charcoal. Tahapan penelitian meliputi sintesis dan optimasi komposisi PVA/Borat/Gracilaria/Charcoal, karakterisasi menggunakan instrumentasi spektrofotometer Fourier Transform Infra-Red (FTIR), Scanning Electron Microscopy (SEM), dan water contact angle (WCA), serta uji performa agrokimia meliputi swelling ratio, water retention, biodegradabilitas, dan release behavior nutrien pada kedua jenis hidrogel. Hasil penelitian menunjukkan PVA/Borat/Gracilaria/Charcoal berhasil disintesis dengan komposisi optimum charcoal pada konsentrasi 5 ppm dan PVA/Borat/Gracilaria/Charcoal/CaCO3-KCl berhasil disintesis melalui metode pelapisan granula oleh hidrogel. Spektra FTIR menunjukkan bahwa interaksi komponen hidrogel PVA/Borat/Gracilaria/Charcoal melibatkan beberapa ikatan seperti C-O, C-C, C=O, C-H sp3, B-O serta O-H yang sebagian besar terjadi melalui ikatan hidrogen. Analisis SEM menunjukkan hidrogel PBGC memiliki lapisan yang lebih jelas dibandingkan dengan PVA/Borat/Gracilaria. Penambahan charcoal meningkatkan nilai swelling ratio, meningkatkan nilai water retention, mengurangi hidrofilisitas hidrogel, memperlambat laju release nutrien, dan membuat hidrogel tidak mudah terdegradasi. The proper application of fertilizers can enhance agricultural productivity, but excessive use of fertilizers can reduce efficiency and negatively impact the environment. Slow/ControlledRelease Fertilizers (S/CRF) are considered a good solution for increasing fertilizer use efficiency. S/CRF works by slowly releasing nutrients, thereby reducing nutrient loss to the environment and improving fertilizer effectiveness. Studies on the development of S/CRF have shown that gels based on PVA/Borate/Gracilaria have strong potential for further development. On the other hand, charcoal is a commonly used material by farmers as an additive in fertilization. This study investigates how charcoal affects the characteristics and agrochemical performance of S/CRF hydrogel sheets made from PVA/Borate/Gracilaria/Charcoal and the performance of granules with a mixture of CaCO3 and KCl coated with PVA/Borate/Gracilaria/Charcoal gel, as well as the biodegradability of S/CRF PVA/Borate/Gracilaria/Charcoal hydrogels. The research stages include the synthesis and optimization of PVA/Borate/Gracilaria/Charcoal composition, characterization using Fourier Transform Infra-Red (FTIR) spectrophotometry, Scanning Electron Microscopy (SEM), and water contact angle (WCA) measurements, as well as agrochemical performance tests covering swelling ratio, water retention, biodegradability, and nutrient release behavior in both types of hydrogels. The results show that PVA/Borate/Gracilaria/Charcoal was successfully synthesized with an optimum charcoal composition at a concentration of 5 ppm, and PVA/Borate/Gracilaria/Charcoal/CaCO3-KCl was successfully synthesized through a granule coating method using the hydrogel. FTIR spectra indicate that the interactions among the components of the PVA/Borate/Gracilaria/Charcoal hydrogel involves several bonds such as C-O, C-C, C=O, C-H sp3, B-O, and O-H, most of which occur through hydrogen bonding. SEM analysis shows that PBGC hydrogel has a more distinct layer compared to PVA/Borate/Gracilaria. The addition of charcoal increases the swelling ratio, improves water retention, reduces hydrogel hydrophilicity, slows down nutrient release, and makes the hydrogel more resistant to degradation.

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Item Type:	Thesis (S1)
Additional Information:	https://scholar.google.com/citations?hl=id&user=cmKjH58AAAAJ ID SINTA Dosen Pembimbing: Hendrawan: 5994163 Hafiz Aji Aziz: 6748855
Uncontrolled Keywords:	Hidrogel, S/CRF, Gracilaria, Charcoal, Release Behavior Hydrogel, S/CRF, Gracilaria, Charcoal, Release Behavior
Subjects:	L Education > L Education (General) Q Science > QD Chemistry
Divisions:	Fakultas Pendidikan Matematika dan Ilmu Pengetahuan Alam > Program Studi Kimia - S1 > Program Studi Kimia (non kependidikan)
Depositing User:	Bilqis Aprilia Salima
Date Deposited:	13 Sep 2024 09:59
Last Modified:	13 Sep 2024 09:59
URI:	http://repository.upi.edu/id/eprint/124629

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