Fotodegradasi Tetrasiklin dengan Metode foto-Fenton Heterogen Menggunakan Katalis Nanopartikel Fe2O3 Teremban Serbuk Tempurung Biji Nyamplung
Lintang Adya Ananti, Prof. Dr. Endang Tri Wahyuni, M.S.; Prof. Dr.rer.nat. Nurul Hidayat Aprilita, S.Si., M.Si.
2026 | Skripsi | KIMIA
This study investigated Fe2O3 nanoparticles supported on nyamplung seed shell (TBN) as a catalyst for the heterogeneous photo-Fenton process for the photodegradation of tetracycline. The study aimed to determine the effect of TBN as a supporting material on the characteristics of Fe2O3/TBN and its catalytic activity toward tetracycline degradation. TBN was cleaned and ground, followed by FTIR characterization and lignocellulosic component analysis. Fe2O3/TBN and Fe2O3 nanoparticles were synthesized by the precipitation method using FeCl3?6H2O as a precursor and NaOH as a precipitating agent, followed by calcination at 250 °C. The synthesized materials were characterized using XRD, XRF, DR-UV, and SAA to determine their crystal structure and phase, chemical composition, optical properties, and surface characteristics. Catalytic activity was evaluated through the heterogeneous photo-Fenton process to photodegradation of tetracycline. Tetracycline concentrations before and after degradation were analyzed using UV-Vis spectrophotometry at a wavelength of 356 nm.
The characterization result show that Fe2O3/TBN nanoparticles were dominated by the maghemite phase with a mixture of magnetite, while Fe2O3 exhibited the hematite phase. Fe2O3/TBN has a smaller crystallite size of 19.14 nm, compared to Fe2O3 exhibits a size of 46.61 nm. Fe2O3/TBN also showed a lower specific surface area and higher band gap energy than Fe2O3. These characteristics were associated with the lower catalytic activity of Fe2O3/TBN ini tetracycline photodegradation. The optimum conditions for photodegradation of tetracycline antibiotic residues is with a catalyst mass of 10 mg, H2O2 concentration 90 mmol/L, pH 5, and irradiation time of 120 minutes.
Kata Kunci : foto-Fenton heterogen, nanopartikel Fe2O3, tempurung biji nyamplung