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Yuliawati, Erna
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Computer Science & IT Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Karakterisasi Struktur dan Morfologi Membran Polietersulfon dengan Penambahan Variasi Katalis Organik Titanium Dioksida Khuluqa, M Afif Al Ahsan; Mardwita, Mardwita; Yuliawati, Erna
Jurnal Teknologi Riset Terapan Vol. 2 No. 1 (2024): Januari
Publisher : Penerbit Goodwood

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35912/jatra.v2i1.4948

Abstract

This study aims to synthesize and characterize ultrafiltration membranes based on polyethersulfone (PES) with the incorporation of titanium dioxide (TiO?) as an organic catalyst at varying concentrations (0%, 1%, and 2%). The goal is to evaluate the impact of TiO? addition on the structural and morphological properties of PES membranes to improve water treatment performance. Research/methodology: Membranes were fabricated using the phase inversion technique, employing N,N-dimethylacetamide (DMAc) as the solvent and polyvinylpyrrolidone (PVP) as the pore-forming additive. Characterization techniques included Fourier-transform infrared spectroscopy (FTIR) for functional group identification, scanning electron microscopy (SEM) and atomic force microscopy (AFM) for morphological analysis, contact angle measurement for hydrophilicity, porosity testing, and pure water flux evaluation. Results: The addition of TiO? improved the hydrophilicity of PES membranes, reducing the contact angle from 68.2° to 53.7°, and increased porosity from 48.78% to 67.75%. Morphological analysis showed enhanced pore distribution and surface structure. The membrane with 2% TiO? achieved the highest water flux of 5.77 L/m²·h. Although this value is below the typical ultrafiltration standard (10–50 L/m²·h), the improvements indicate the potential of TiO? to enhance membrane performance. Conclusions: Incorporating TiO? into PES membranes significantly enhanced their hydrophilicity, porosity, and structural uniformity. The optimal performance was observed at a 2% TiO? concentration. Limitations: The study is limited by the non-uniform dispersion of TiO? particles and was conducted under laboratory-scale conditions without real-world application testing. Contribution: This research provides insight into the role of TiO? in improving PES membrane characteristics and serves as a practical reference for developing advanced ultrafiltration membranes for water treatment applications.
Degradasi Warna dan pH pada Air Gambut Menggunakan Metode Fotokatalisis TiO2 dengan Variasi UltraViolet Putri, Amelia; Yuliawati, Erna; Mardwita, Mardwita
Jurnal Teknologi Riset Terapan Vol. 2 No. 2 (2024): Juli
Publisher : Penerbit Goodwood

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35912/jatra.v2i2.5003

Abstract

Purpose: This study aimed to evaluate the effectiveness of TiO? photocatalysis with varying UV light intensities in degrading color, reducing iron content, and improving pH in peat water, which is naturally acidic and rich in organics. Methodology: Peat water was treated using TiO? doses of 1.5 g and 2.5 g under 24 W and 32 W UV lamps for 3–6 h. The analyzed parameters included color (TCU), pH, iron (Fe), and E. coli counts. The experiments used a batch reactor with multiple UV sources to enhance the photocatalytic activity. Results: Color was completely removed (100%) under all treatment conditions. The highest Fe reduction (97.8%) occurred using 1.5 g TiO? under 24 W UV irradiation for 4 h. The highest pH increase (62.33%) was achieved using 2.5 g TiO? under 32 W UV for 6 h, raising the pH from 3.00 to 4.87. E. coli was fully eliminated in all variations. Conclusion: TiO? photocatalysis effectively removed color, iron, and bacteria from peat water. However, although the pH improved, it remained below potable water standards, indicating the need for further treatment. Limitation: The study was limited to laboratory-scale conditions and did not achieve neutral pH levels, requiring additional post-treatment and field validation for practical application. Contribution: This study highlights TiO?/UV photocatalysis as a promising method for advanced peat water treatment. This study offers insights into optimizing treatment parameters for improved water quality in future applications.
Aplikasi Fenton – Fotokatalisis TiO2 pada Pengolahan Air Gambut Kasanudin, Ahmad; Yuliawati, Erna; Fernianti, Dewi
Jurnal Teknologi Riset Terapan Vol. 2 No. 2 (2024): Juli
Publisher : Penerbit Goodwood

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35912/jatra.v2i2.5005

Abstract

Purpose: This study investigated the effectiveness of combining the Fenton process with TiO? photocatalysis to improve peat water quality by reducing TSS, BOD, Fe, color, and bacterial contamination. Methodology: Peat water samples were treated in a batch reactor using TiO? doses of 1.5 g and 2.5 g under UV exposure for 2, 4, and 6 h. Hydrogen peroxide (H?O?) and TiO? served as oxidants and photocatalysts, respectively. The parameters measured before and after treatment included TSS, BOD, Fe, pH, color, and E. coli. Results: The best performance was achieved with 2.5 g TiO? and 4 h of UV exposure, reducing BOD to 1.65 mg/L, TSS to 17.8 mg/L, Fe to 0.36 mg/L, and fully eliminating E. coli. However, the pH remained acidic at 2.93. The process was effective in removing pollutants and disinfecting water, although it was insufficient for pH neutralization. Conclusion: The combined Fenton–TiO? process significantly enhanced peat water treatment by reducing major pollutants and bacterial contamination. Optimal results were achieved with 2.5 g TiO? and 4-hour UV exposure, but further treatment is required to raise the pH to potable standards. Limitations: The process failed to achieve neutral pH levels and was tested only in a laboratory-scale setting, without evaluating real-world scalability. Contribution: This study supports the use of Fenton–TiO? photocatalysis as a promising method for treating heavily polluted peat water. This study provides operational insights for the development of advanced oxidation-based systems for sustainable water purification.
Co-Authors Fernianti, Dewi Kasanudin, Ahmad Khuluqa, M Afif Al Ahsan Mardwita, Mardwita Putri, Amelia