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All Journal Jurnal Ekonomi, Bisnis dan Kewirausahaan (JEBIK) International Journal of Education JURNAL ILMU MANAJEMEN DAN BISNIS LOKABASA REFLEKSI EDUKATIKA Jurnal Pendidikan Usia Dini Jurnal Terapan Ilmu Keolahragaan Jurnal Pendidikan Olah Raga Jurnal Manajemen STIE Muhammadiyah Palopo Kinestetik : Jurnal Ilmiah Pendidikan Jasmani JOURNAL SPORT AREA Al Qalam: Jurnal Ilmiah Keagamaan dan Kemasyarakatan AkMen JURNAL ILMIAH International Journal of Social Science and Business Walisongo Journal of Chemistry Jurnal SPORTIF : Jurnal Penelitian Pembelajaran JKPK (Jurnal Kimia dan Pendidikan Kimia) LAYAR: Jurnal Ilmiah Seni Media Rekam Riyadhoh : Jurnal Pendidikan Olahraga Loa : Jurnal Ketatabahasaan dan Kesusastraan Jurnal PORKES PINISI Discretion Review Community Empowerment Nobel Management Review Wacana : Jurnal Bahasa, Seni, dan Pengajaran DIMASATRA Physical Therapy Journal of Indonesia Delta-Phi Jurnal Pendidikan Matematika Maddana: Jurnal Pengabdian Kepada Masyarakat Jurnal Ikadbudi : Jurnal Ilmiah Bahasa, Sastra, dan Budaya Daerah JSSF : Journal of Sport Science and Fitness
Hernawan Hernawan
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Religion Arts Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Mathematics Medicine & Pharmacology Neuroscience Nursing Physics Public Health Social Sciences Other

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Journal : Walisongo Journal of Chemistry

 1 
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.
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.
Co-Authors Abd. Rasyid Syamsuri Abrasyi, Rendy ADE SUTISNA, ADE Alamsyah, Zulfikar Anggara, Norma Anjar Purba Asmara Anshari, Dadang Anwar, Muhammad Saidun Apriana Sanga Dwi, Dicky Reva Baturante, Nur Jannah Cahyono, Tedi Choirudin, Choirudin Cipta, Indra Dadang Sunendar Dede Kosasih Defliyanto Deni Abdul Ghoni Devi Catur Winata Dingding Haerudin Dupri, Dupri Erwin Erwin Fahmy Fachrezzy Fahrullah, Muh. Fandhi, Fandhi Haris Santosa Nugraha Hazrina Amni Hemalia, Alisha Hendrayana, Dian Hidayat, Neng Tanti Septiani Humaid, Hidayat Indra, Indra Aditiya James Klemen Lika James Tangkudung Jayawarsa, A.A. Ketut Karisdha Pradityana Khofia, Salma Nida Lukmana Sari, Ida Maghfiroh, Wasiattul Mariah Mariah Mariah, Mariah Mubyl, Mutiarini Muhammad Agus Muljanto Muhammad Syifa Amin Widigdo Mujaddid, Mujaddid Nugraha, Hartman Nur, Yuswari Nurhuda, Denny Adrian Nurkhalik Wahdanial Asbara Nurulfa, Rizky Nuzlia, Cut Pasaribu, Ahmad Muchlisin Natas Permana, Vira Vandini Pratiwi, Endang Putry, Keisya Aurelya Rachim, Erik Rahmah, Firda Aulia Rahman Rahman Rahmatilah, Lola Apriani Ramadhan, Muhammad Gilang Rayhan, Ilyassyah Retty Isnendes Rizal, Faisal Rombe, Yunita Pare RR. Ella Evrita Hestiandari RUHALIAH Dr., RUHALIAH Samsudin Samsudin Sandya, Cathleen Santosa, Haris Saribulan, Saribulan Setiawan, Budi Rahayu Siti Mahmudha Slamet Sukriadi Solehudin, Oleh Sondari, Dea Sujarwo Sujarwo Sujiono, Bambang Sulaiman, Iman Syamsul Arifin Syihabuddin Syihabuddin Temmy Widyastuti Timur, Aprilia Intan Tri Indri Hardini Usep Kuswari Utama, Made Bang Redy Vidya Hartono, Fajar Wa’asil, Fatirul Wattimena, Ferry Yohannes Wenly, Ayu Purnama WIDIASTUTI - Yayat Sudaryat Yulianeta