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All Journal JURNAL PengaMAS Walisongo Journal of Chemistry Jurnal Pendidikan Kimia Unkhair (JPKU)
Baturante, Nur Jannah
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Chemistry Education Mathematics Social Sciences Other

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ADSORPTION KINETICS OF METHYL ORANGE ON SILICA DERIVED FROM GAMALAMA VOLCANIC SOIL Cipta, Indra; Baturante, Nur Jannah; Hernawan, Hernawan; Rombe, Yunita Pare; Mahmudha, Siti
Walisongo Journal of Chemistry Vol. 8 No. 1 (2025): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology UIN Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v8i1.26066

Abstract

Silica gel was successfully synthesized from Gamalama volcanic soil using the sol-gel method and applied as an adsorbent to remove methyl orange (MO) dye. The synthesis process involved treating 20 grams of volcanic soil with 2 M HCl under stirring for 3 hours, followed by a 12-hour soaking period. The solid residue was subsequently filtered, dried, and reacted with 7 M NaOH for 2 hours. The resulting filtrate was neutralized through repeated washing with distilled water, and silica gel formation was achieved by titration with 2 M HCl until a final pH of approximately 3–4 was reached. The synthesized silica was evaluated for its adsorption performance against methyl orange, with optimal conditions identified at pH 4, a contact time of 5 hours, and an adsorbent dosage of 30 mg. UV-Vis analysis showed that the synthesized silica exhibited a higher adsorption capacity (6.7%) compared to raw Gamalama volcanic soil. Kinetic studies indicated that the adsorption process followed a pseudo-second-order model, suggesting chemisorption as the dominant mechanism. The rate constant (k₂) for the synthesized silica was 0.09 M⁻¹·h⁻¹, compared to 0.077 M⁻¹·h⁻¹ for the raw volcanic soil. This indicates that the synthesized silica adsorbed MO more rapidly, likely due to its higher purity and greater availability of active sites. The slightly lower k₂ observed in raw volcanic soil might be attributed to the presence of clay minerals such as halloysite and allophane, which possess negative surface charges at neutral to alkaline pH levels, leading to electrostatic repulsion with the negatively charged MO anions. Silica gel synthesized from Gamalama volcanic soil demonstrates promising potential as an eco-friendly adsorbent for dye removal from aqueous solutions.
PENDAMPINGAN PRAKTIKUM KIMIA VIRTUAL CHEM-LAB DAN PENYUSUNAN PANDUAN BERBASIS BAHAN LOKAL MALUKU UTARA Cipta, Indra; Baturante, Nur Jannah; Mauraji, Ilham; Embisa, Anjam Putra A.; Umahuk, Sabaria
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Publisher : LPPM UNIVERSITAS KHAIRUN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/pengamas.v7i3.8598

Abstract

Pengabdian pada masyarakat ini bertujuan untuk memberikan pendampingan kepada siswa melakukan praktikum kimia tanpa akses internet dengan menggunakan aplikasi Chemlab. Kegiatan ini dilakukan di SMAN 10 Kota Ternate. Teknologi yang digunakan dalam kegiatan pengabdian ini adalah komputer, LCD kegiatan ini dilakukan menggunakan metode pendampingan secara langsung. Instrumen yang digunakan yaitu angket respon siswa menggunakan skala 1-4. data dianalisis secara deskriptif tiap indikator. Hasil dari kegiatan ini adalah adanya transfer pengetahuan dan skill kepada siswa. Respon siswa diperoleh sebanyak 89% siswa memberikan respon setuju aplikasi chemlab dapat dijadikan media pembelajaran kimia, sebanyak 89% siswa setuju mudah mengidentifikasi bentuk dan ukuran alat praktikum, kemudahan mengambil data praktikum, serta kemudahan menganalisis hasil praktikum dengan, sebanyak 75% siswa memberikan respon setuju tidak mengalami kesulitan menggunakan chemlab, 93% siswa memberikan respon setuju jika aplikasi chemlab lebih ramah lingkungan, praktikum kimia dengan menggunakan chemlab lebih aman, sebanyak 87% siswa memberikan respon setuju jika siswa menyelesaikan praktikum dengan sukses.
Co-Authors Ahmad Muchsin Jayali Annisa, Dira Ayu Ariyana, Muto'ah Intan Cipta, Indra Daiman, Fanina Embisa, Anjam Putra A. Fadlan Muin Hernawan Hernawan Ibrahim, Fitriana Kumendong, Nurbaiti Kusuma, Anggieta Pahmawati Liong, Nurhaja Mauraji, Ilham Mauraji, Ilham SW Moligai, Nursafina Banse Muhammad Amin Muhdar, Sri Arlika Muliadi MULIADI -, MULIADI Muzdalifa, Eccy Sitti Nur Abu, St Hayatun Nur Anisa Nur Asbirayani Limatahu Nurfatimah Sugrah Puspitasar, Setyani Dian Rombe, Yunita Pare RR. Ella Evrita Hestiandari Siti Mahmudha Umahuk, Sabaria Zulkifli Zam Zam