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All Journal Jurnal Sains dan Teknologi Gravitasi: Jurnal Pendidikan Fisika dan Sains JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah)
Fadlly, T. Andi
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Astronomy Computer Science & IT Education Electrical & Electronics Engineering Energy Physics

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Identifikasi Mineral dan Karakterisasi Sifat Magnetik Pasir Besi di Pesisir Pantai Leuge Aceh Timur Sari, Nirmala; Fadlly, T. Andi; Rahmawati; Hotmaida, Romauli; Purba, Herlina; Nila, Ida Ratna; Fajriani; Fahril, M. Ari
Jurnal Pendidikan Fisika dan Sains Vol 7 No 02 (2024): GRAVITASI: JURNAL PENDIDIKAN FISIKA DAN SAINS
Publisher : Program Studi Pendidikan Fisika FKIP Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33059/gravitasi.jpfs.v7i02.12801

Abstract

Penelitian ini dilakukan dengan tujuan untuk mengidentifikasi kandungan mineral serta mengkaji sifat kemagnetan dari pasir besi yang berasal dari wilayah pesisir Pantai Leuge, Aceh Timur. Proses sintesis dilakukan menggunakan metode kopresipitasi dengan larutan HCl dengan variasi konsentrasi NH₄OH, yaitu 5,5 M dan 6,5 M. Karakterisasi sampel dilakukan melalui pengujian X-Ray Fluorescence (XRF) dan Vibrating Sample Magnetometer (VSM). Hasil analisis XRF menunjukkan bahwa komponen utama dalam sampel adalah Fe₂O₃ dengan persentase sebesar 60,256%, disusul TiO₂ sebesar 34,612 %. Uji VSM menunjukkan bahwa sampel bersifat superparamagnetik lunak, dengan nilai koersivitas (Hc) kurang dari 0,03T. Nilai tertinggi untuk magnetisasi remanen (Mr) dan magnetisasi saturasi (Ms) masing-masing tercatat sebesar 17,40 emu/gr dan 16,94 emu/gr. Berdasarkan karakteristik ini, material tersebut memiliki potensi aplikasi dalam teknologi magnetik lunak, seperti inti transformator, sensor magnetik, sistem penghantaran obat berbasis medan magnet, serta sebagai adsorben logam berat dalam pengolahan limbah. Temuan ini mengindikasikan bahwa pasir besi dari Pantai Leuge memiliki prospek yang menjanjikan sebagai material fungsional, khususnya dalam bidang elektromagnetik.
Pengaruh Waktu Radiasi Gelombang Mikro Terhadap Karakteristik Pori Karbon Aktif Kulit Singkong (Manihot esculenta Crantz) Rahmawati; Fajri, Rahmatul; Fadlly, T. Andi; Sari, Nirmala; Annisa, Fera; Husna, Siti Sarah
JST (Jurnal Sains dan Teknologi) Vol. 14 No. 2 (2025): July
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jst-undiksha.v14i2.95528

Abstract

Cassava peel waste is a biomass that has not been optimally utilized, even though it has the potential as a raw material for activated carbon. The problems that arise are the low added value of this waste and the need for efficient technology to produce highly porous activated carbon. This study aims to analyze the effect of variations in microwave irradiation time on the pore characteristics of cassava peel-based activated carbon. This study uses a quantitative approach with a laboratory experimental design. The research subjects were activated carbon resulting from chemical and microwave activation treatments, with three trial groups, each consisting of one activated carbon sample processed for 10, 15, and 20 minutes. Data collection methods were carried out through characterization using X-ray Fluorescence (XRF), Scanning Electron Microscopy (SEM), and Ultraviolet-Visible (UV-Vis) spectroscopy instruments. Data were analyzed descriptively and comparatively to observe pore structure development, elemental composition, and optical properties between samples. The results showed that the longer the microwave activation time, the more the porosity and surface structure of the activated carbon developed, with sample AC20 showing the best pore morphology and the highest absorption value. The conclusion of this study indicates that a combination of chemical and microwave-based activation is effective in producing highly porous activated carbon from cassava peels. This research implies that cassava peel waste can be an alternative solution in developing environmentally friendly adsorbent materials for pollutant remediation applications in aquatic environments.
Adsorpsi Zat Organik Limbah Laundry Menggunakan Karbon Aktif dari Limbah Kulit Singkong (Manihot esculenta Crantz) Destanti, Mita; Rahmawati, Rahmawati; Sari, Nirmala; Annisa, Fera; Fadlly, T. Andi
JIPFRI (Jurnal Inovasi Pendidikan Fisika dan Riset Ilmiah) Vol. 9 No. 2 (2025): November Edition
Publisher : Universitas Nurul Huda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30599/jipfri.v9i2.4823

Abstract

In this study, activated carbon from cassava peel waste has been synthesized, with the aim of analyzing its effectiveness in reducing BOD and COD levels in laundry wastewater. Activated carbon was synthesized through a carbonization process at various temperatures (250°C, 300°C, 350°C) for 1.5 hours, then chemically activated using 2% KOH and physically activated with microwaves. Morphological characterization using SEM, and adsorption effectiveness was tested with contact time variations of 0 and 5 days for BOD, COD, pH, and temperature parameters. The results of SEM characterization showed that the carbonization temperature of 300°C produced optimal micro and mesoporous pore structures without structural damage. Treatment with activated carbon from 300°C carbonization (sample A2) showed the best performance, with a decrease in BOD from 450 mg/L to 200 mg/L and COD from 21.7 mg/L to 3.72 mg/L. The pH and temperature values after adsorption also meet environmental quality standards, namely neutral pH (7) and temperature 25.7°C. Activated carbon from cassava peel waste has been proven to be effective as an environmentally friendly adsorbent for laundry waste processing.
Co-Authors Destanti, Mita Fahril, M. Ari Fajri, Rahmatul Fajriani Fera, Annisa Herlina Purba Hotmaida, Romauli Husna, Siti Sarah Ida Ratna Nila Nirmala Sari Rahmawati Rahmawati, Rahmawati