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All Journal EKSAKTA: Journal of Sciences and Data Analysis Journal of Science Education Research
Sudariasri, Vida Zenitha
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Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Materials Science & Nanotechnology Social Sciences

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Characterization and Application of Greener-Activated Coal Fly Ash for Phosphate Adsorption in Donan River Water Samples Rohmah, Dini Novi; Nur Mas'udah, Aldina Khoerunnisa; Sudariasri, Vida Zenitha; Boikh, Mesakh Trywira Wibowo; Moneteringtyas, Prisca Caesa
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 6, ISSUE 2, October 2025
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/EKSAKTA.vol6.iss2.art9

Abstract

The Karangkandri PLTU (Steam Power Plant) Industry in Cilacap is one of the large industries in the Cilacap industrial area, which has abundant coal-burning waste in the form of fly ash. The excess fly ash from PLTU Karangkandri can be used for the adsorption of polluted phosphate ions in the Donan River. The aim of this research is to determine the characterization of fly ash as an adsorbent using FTIR (Fourier Transform Infra-Red), XRD (X-Ray Diffraction), and XRF (X-Ray Fluorescence) instruments and its ability to adsorb phosphate ions in a polluted water sample. The first stage of this research was to take water samples from the Donan River at the 3 most polluted points. The second stage was to activate fly ash using wet grinding and hydrothermal methods as well as characterization of fly ash using FTIR, XRD, and XRF instruments. Then the effectiveness of the fly ash adsorbent in adsorbing phosphate ion was tested by using the spectrometric method. The analysis was carried out with the influence of mass variations in the adsorbent of 50, 100, 150, and 200 grams per 500 ml of water sample. This research found that activated fly ash by greener activation can removed 82,8% phosphate ion with 0,5g fly ash, remove 72.4% phosphate ion with 1 gram fly ash, removed 77.6% phosphate ion with 2 grams of fly ash. And the best one is 5 grams of fly ash can remove 93.2% phosphate ion.
Exploratory Study of Student Needs in the Development of Technology-Based Chemical Computing Software Ariyatun, Ariyatun; Sagita, Sylva; Venessa, Devita Marlina; Sudariasri, Vida Zenitha; Nurcahyono, Novi Andri; Ramadani, Rosi Fitri
Journal of Science Education Research Vol. 10 No. 1 (2026): J. Sc. Edu. Research (In Progress)
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jser.v10i1.90331

Abstract

The development of digital technology in education demands innovations in chemistry learning, especially in explaining abstract concepts such as molecular structure, chemical reactions, and properties of compounds. This research aims to explore the needs of chemistry education students towards the development of technology-based chemical computing software. The research method uses a quantitative approach with an exploratory descriptive design. The data was obtained through a closed questionnaire on the Likert scale, which was distributed to 117 students of the Chemistry Education study program from three universities in Indonesia. Data analysis was carried out using descriptive statistics in the form of frequency, average, and standard deviation. The results showed that students had a high need for interactive 3D molecular visualization features (M = 4.09), integration of materials with concept animation (M = 4.09), and interactive exercises (M = 4.06). In addition, simple reaction simulation features and auto-scoring were also considered important (M = 4.03). Meanwhile, the aspect of cross-device access (M = 3.76) and the availability of Indonesian content according to the national curriculum (M = 3.55) received a lower score, although it remained in the high category. The conclusion of this study emphasizes the importance of developing chemical computing software that is not only visual, but also educational, adaptive, and according to the needs of students. The implications of the research results provide direction for educational technology developers, curriculum designers, and higher education institutions in designing chemistry learning media that are more contextual, inclusive, and sustainable.
Co-Authors Ariyatun, Ariyatun Boikh, Mesakh Trywira Wibowo Dini Novi Rohmah Novi Andri Nurcahyono Nur Mas'udah, Aldina Khoerunnisa Prisca Caesa Moneteringtyas Rosi Fitri Ramadani Sylva Sagita Venessa, Devita Marlina