Thasia Gian Pavita, - (2024) Sintesis, Karakterisasi, dan Uji Performa S/CRF PVA/Borat/Gracilaria-CaCO3 Tersisipi KCl. S1 thesis, Universitas Pendidikan Indonesia.
Abstract
Ketersediaan pupuk di sekitar perakaran tanaman merupakan hal yang penting untuk pertumbuhan dan produktivitas tanaman yang bersangkutan. Penggunaan pupuk yang tepat dapat meningkatkan hasil panen, namun pemakaian pupuk yang berlebihan dapat mengurangi efisiensi dan beresiko terhadap lingkungan. Pupuk pelepasan lambat/terkendali (Slow/Controlled-Release Fertilizer, S/CRF) dipandang sebagai solusi untuk meningkatkan efisiensi penggunaan pupuk, dengan melepaskan nutrien secara perlahan sehingga mengurangi kerugian nutrien ke lingkungan, dan meningkatkan efisiensi penggunaan pupuk. Salah satu bahan dasar S/CRF yang umum digunakan adalah berbasis hidrogel. Penelitian ini bertujuan untuk mengetahui karakteristik S/CRF lembaran hidrogel PVA/Borat/Gracilaria dan performa S/CRF lembaran hidrogel PVA/Borat/Gracilaria dan S/CRF granula PVA/Borat/Gracilaria, serta biodegradabilitas hidrogel S/CRF PVA/Borat/Gracilaria. Pada penelitian ini dilakukan sintesis S/CRF hidrogel lembaran dari polivinil alkohol (PVA), borat, dan Gracilaria, dan hidrogel S/CRF granula dengan campuran CaCO3 dan KCl yang dilapisi gel PVA/Borat/Gracilaria. Karakteristik kedua jenis S/CRF tersebut meliputi gugus fungsi (vibrasi) yang dikarakterisasi dengan FTIR (Fourier transform infrared spectroscopy), morfologi permukaan dengan SEM (scanning electron microscope), dan hidrofilisitas dengan WCA (water contact angle). Performa hidrogel yang dikaji meliputi SR (swelling ratio), WR (water retention), RB (release behavior) dan biodegradabilitas. Spektra FTIR menunjukkan bahwa interaksi komponen hidrogel (G, PVA, dan B) melibatkan beberapa gugus fungsi dan ikatan seperti C-O, C-C, C=O, C-H sp3, C-H sp2, B-O serta O-H yang sebagian besar terjadi melalui ikatan hidrogen. Analisis SEM menunjukkan PVA/Borat memiliki struktur lebih berongga dari PVA/Borat/Gracilaria. Penambahan Gracilaria meningkatkan nilai swelling ratio, hidrofilisitas hidrogel, memperlambat laju release nutrien, dan meningkatkan biodegradabilitas hidrogel. Walaupun demikian, PVA/Borat/Gracilaria memberikan nilai water retention yang lebih rendah dibandingkan dengan PVA/Borat. The availability of fertilizer around plant roots is crucial for the growth and productivity of the plants. The appropriate use of fertilizer can increase crop yields, but excessive use can reduce efficiency and pose environmental risks. Slow/Controlled-Release Fertilizers (S/CRF) are seen as a solution to enhance fertilizer use efficiency by releasing nutrients gradually, thereby reducing nutrient losses to the environment and improving fertilizer efficiency. One of the common base materials for S/CRF is hydrogel-based. This study aims to determine the characteristics of PVA/Borate/Gracilaria hydrogel sheet S/CRF and the performance of PVA/Borate/Gracilaria hydrogel sheet S/CRF and PVA/Borate/Gracilaria granule S/CRF, as well as the biodegradability of the PVA/Borate/Gracilaria hydrogel S/CRF. In this research, S/CRF hydrogel sheets were synthesized from polyvinyl alcohol (PVA), borate, and Gracilaria, and granule S/CRF hydrogels were synthesized by mixing CaCO3 and KCl coated with PVA/Borate/Gracilaria gel. The characteristics of these two types of S/CRF include functional groups (vibrations) characterized by FTIR (Fourier Transform Infrared Spectroscopy), surface morphology with SEM (Scanning Electron Microscope), and hydrophilicity with WCA (Water Contact Angle). The hydrogel performance examined includes SR (Swelling Ratio), WR (Water Retention), RB (Release Behavior), and biodegradability. FTIR spectra showed that the interaction of hydrogel components (G, PVA, and B) involves several functional groups and bonds such as C-O, C-C, C=O, C-H sp3, C-H sp2, B-O, and O-H, mostly occurring through hydrogen bonds. SEM analysis indicated that PVA/Borate has a more porous structure than PVA/Borate/Gracilaria. The addition of Gracilaria increased the swelling ratio value, hydrophilicity of the hydrogel, slowed down the nutrient release rate, and improved the biodegradability of the hydrogel. However, PVA/Borate/Gracilaria showed a lower water retention value compared to PVA/Borate.
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S_KIM_2009432_Chapter1.pdf Download (174kB) |
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| Item Type: | Thesis (S1) |
|---|---|
| Additional Information: | https://scholar.google.com/citations?view_op=new_profile&hl=en ID SINTA Dosen Pembimbing: Dr. Hendrawan, M.Si. 5994163 Hafiz Aji Aziz, M.Sc. 6748855 |
| Uncontrolled Keywords: | Hidrogel, Slow/Controlled-Release Fertilizer, Gracilaria, Release behavior |
| Subjects: | Q Science > QD Chemistry |
| Divisions: | Fakultas Pendidikan Matematika dan Ilmu Pengetahuan Alam > Program Studi Kimia - S1 > Program Studi Kimia (non kependidikan) |
| Depositing User: | Thasia Gian Pavita |
| Date Deposited: | 11 Sep 2024 02:45 |
| Last Modified: | 11 Sep 2024 02:45 |
| URI: | http://repository.upi.edu/id/eprint/124043 |
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