Claim Missing Document
Check
Articles

Found 2 Documents
Search

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.
Pengembangan Multimedia Pembelajaran Interaktif Materi Keragaman Budaya di Indonesia Kelas IV SDN 03 Pontianak Selatan Annisa, Rani; KartonoKartono, Kartono; Pranata, Rio; Ghasya, Dyoty Auliya Vilda; Safrianty, Nany
YASIN Vol 6 No 4 (2026): YASIN: Jurnal Pendidikan dan Sosial Budaya
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/yasin.v6i4.10852

Abstract

The limited use of interactive learning multimedia on Indonesian Cultural Diversity material, particularly traditional clothing and traditional houses of provinces in Indonesia, indicates the need for media that can provide visualization, interactivity, and learning experiences that are easier for elementary school students to understand. This study aims to develop interactive educational multimedia with the theme of Cultural Diversity in Indonesia that meets the needs of fourth-grade students at SDN 03 South Pontianak and to determine its feasibility level. This study used a Research and Development (R&D) method with the ADDIE model, which includes the stages of analysis, design, development, implementation, and evaluation. The research sample consisted of 31 students and two multimedia expert validators. Data were collected through interviews, observation, and questionnaires, then analyzed descriptively and quantitatively by calculating the percentages of expert validation results and student responses to the developed multimedia. The needs analysis results showed that learning multimedia needs to integrate audio, visual, and interactive elements so that the material is easier to understand. The design stage produced multimedia that combines text, images, audio, animation, video, and interactive quizzes, which was developed using iSpring Suite 11 and published in HTML5 format so that it can be accessed online. The multimedia expert validation results obtained a percentage of 93% in the highly feasible category, while the student trial results obtained a percentage of 92.94% in the highly feasible category. The conclusion of the study affirms that interactive educational multimedia with the theme of Cultural Diversity in Indonesia is feasible for use as learning media on traditional clothing and traditional houses material in elementary schools. The implications of this study indicate that interactive multimedia can serve as an alternative learning medium for teachers in delivering Indonesian Cultural Diversity material in a more visual, engaging, and interactive manner, while also enriching studies on the development of learning media in elementary schools.