Hufaidatul Azfa Nurusyifa Ramdaniah, - (2023) PENGARUH DONOR IKATAN HIDROGEN ASAM OKSALAT, ASAM MALONAT, DAN ASAM SUKSINAT PELARUT EUTEKTIK TERHADAP PELINDIAN PERAK DARI LIMBAH PRINTED CIRCUIT BOARD. S1 thesis, Universitas Pendidikan Indonesia.
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Abstract
There are 1.2 million tons of Printed Circuit Board (PCB) waste in 2022. PCBs contain silver which has a high potential economic value. The high production of waste and the potential economic value make it important to recycle PCB waste. Recycling can be conducted by leaching silver using Deep Eutectic Solvent (DES). DES is environmentally friendly and able to form complexes with various types of metals. Choline chloride-based DES was used as Hydrogen Bond Acceptor (HBA) with oxalic acid, malonic acid, and succinic acid as Hydrogen Bond Donor (HBD). This research aims to study the effect of HBD carbon chain length on physical properties and silver leaching efficiency. Optimization of S/L ratio, time, and temperature was conducted to obtain optimum leaching conditions. The synthesis results showed that DES oxaline 2:1, malin 1:1, and succilin 2:1 had the best stability in the form of colorless, clear, and viscous solutions. FTIR results showed a shift in the wave number of the -OH group due to hydrogen bonding interactions between HBA and HBD molecules in the formation of DES. The leaching results of DES to silver oxide were measured using AAS which showed that 2:1 oxaline DES had the highest efficiency compared to other DES variations, which was 59.25%, indicating that chain length affects the leaching efficiency and HBD with short chain length has a good efficiency value due to high acidity. The optimization results showed that the optimum conditions of S/L ratio, time, and temperature were 40mg/mL, 18 hours and 60°C, respectively, which resulted in a leaching percentage of 90.90% on Ag2O and 99.38% on PCB samples. It can be concluded that DES has the potential as an environmentally friendly solvent that is efficient in leaching silver.
| Item Type: | Thesis (S1) |
|---|---|
| Additional Information: | Link Google Scholar: https://myaccount.google.com/?hl=en&pli=1 ID Sinta Dosen Pembimbing : Soja Siti Fatimah: 5976517 Abraham Mora: 6778862 |
| Uncontrolled Keywords: | Kata kunci: Deep Eutectic Solvent, Printed Circuit Board, Oksalin, Pelindian, Perak. Keywords: Deep Eutectic Solvent, Printed Circuit Board, Oxaline, Leaching, Silver. |
| Subjects: | Q Science > QD Chemistry |
| Divisions: | Fakultas Pendidikan Matematika dan Ilmu Pengetahuan Alam > Jurusan Pendidikan Kimia > Program Studi Kimia (non kependidikan) |
| Depositing User: | Hufaidatul Azfa Nurusyifa Ramdaniah |
| Date Deposited: | 29 Sep 2023 07:50 |
| Last Modified: | 29 Sep 2023 07:50 |
| URI: | http://repository.upi.edu/id/eprint/108343 |
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