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All Journal Reaktor Jurnal Teknologi Mineral dan Batubara WIDYA LAKSANA Jurnal Teknologi Mineral dan Batubara
Aryanti, Putu Teta Prihartini
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Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Energy Environmental Science Materials Science & Nanotechnology Other

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Journal : Reaktor

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Gravity-Based PVC/PVP/SiO2 Membrane for River Water Treatment Aryanti, Putu Teta Prihartini
Reaktor Volume 24 No.1 April 2024
Publisher : Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.24.1.28-35

Abstract

In this study, UF-GDM membranes are made from PVC (12-14% weight), which is mixed with PVP (0-5% weight) and SiO2 (1-3% weight) in a DMAc solvent. The results showed that the PVC/PVP/SiO2 membrane formulation 12/5/1 produced a membrane with the lowest water contact angle of 55° and a permeate flux of 34 L.m-².h-1. However, the membrane is more susceptible to fouling, characterized by a 21% decrease in flux during 5 hours of operation. This is due to the large porosity of the membrane (84%). PVC/PVP/SiO2 formulations 14/2,5/1 showed the highest decrease in contaminants (turbidity above 99.9%, TDS of 47-51%, conductivity of 96%, and organic matter of 97.5%), but low permeate flux (8 L.m-².h-1) due to tighter membrane pores and high flux decrease (20%) due to fouling. The best formulation was obtained in a 12/2,5/1 PVC/PVP/SiO2 composition, with a more stable flux (37 L.m-².h-1) and a decrease of 9% over 5 hours. This formulation also showed a decrease in TDS of 38%, turbidity of 99.9%, conductivity of 96%, and organic substances of 98%. With clear water results, this formulation has the potential to be further developed in the manufacture of membranes for environmentally friendly and energy-efficient clean water supply.
Sulfonated Polysulfone/PEG/Halloysite Nanotube Hybrid Tight-Ultrafiltration Membranes for Treatment of Industrially Contaminated Raw Water Okinawa, Jessica Enis; Agustin, Diva Amerya; Annisa, Rani; Putri, Tiara Ariani; Aryanti, Putu Teta Prihartini
Reaktor Volume 25 No.2 August 2025
Publisher : Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.25.2.%p

Abstract

The quality of river water in Indonesia predominantly falls below the established standards for clean water, including the Citarum River in West Java. Despite the associated health risks, many residents in the river basin continue to utilize this water for their daily needs. This study aims to develop tightly structured ultrafiltration membranes (tight-UF) capable of treating contaminated raw water into clean water. The tight-UF membranes were fabricated using sulfonated polysulfone (SPSf, 20% by weight), blended with polyethylene glycol (PEG400, 20% by weight), and halloysite nanotube additives (HNT, 1-2% by weight) in a solvent mixture of acetone and dimethylacetamide (Ac/DMAc). SPSf was synthesized using a sulfonation technique involving immersion in sulfuric acid at concentrations of 70% and 98%. The findings indicate that increasing the acetone concentration decreases the porosity and increases the membrane skin thickness. Additionally, the inclusion of HNT up to 2% resulted in reduced membrane selectivity due to particle agglomeration. The optimal formulation was identified at concentrations of SPSF/PEG400/HNT/Ac of 20/20/1/5% by weight, yielding a rejection rate of 98.57% and a flux of 63.45 L/m².h at 98% SPSF. These results underscore the potential of tight-UF membranes for applications in clean water treatment from contaminated water sources.
Co-Authors Agustin, Diva Amerya Annisa, Rani Dianawati, Erika Arum Husaini Nugroho, Febrianto Adi Okinawa, Jessica Enis Putri, Tiara Ariani Sirait, Phichiato Susilowati Susilowati Wibawa, Aditya