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Edi Nasra
Universitas Negeri Padang
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Sintesis Berkelanjutan Silika Xerogel (SiO2) dari fly ash: Optimasi Konsentrasi NaOH dan Waktu Aging menggunakan RSM Alifea Arpy; Edi Nasra; M.Iqbal Saputra Gemasih; Afdila Nada
MASALIQ Vol 6 No 1 (2026): JANUARI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v6i1.8895

Abstract

Response Surface Methodology (RSM) was used to optimize the synthesis of silica xerogel from fly ash by evaluating the effects of NaOH concentration and aging time on xerogel mass as the main response. This study aimed to develop a statistical model capable of predicting and optimizing the process conditions for the synthesis of fly ash–based silica xerogel. A Central Composite Design (CCD) with 14 runs was applied to construct a quadratic regression model and analyze the relationships among process conditions. The statistical analysis showed that the quadratic model was significant (p < 0.05), with a coefficient of determination (R²) of 0.7515, indicating good agreement between the model predictions and the experimental data. The quadratic factors of NaOH concentration and aging time had significant effects on the response, indicating a nonlinear relationship and the presence of an optimum region, which was visualized through response surface and contour plots. Numerical optimization identified optimum conditions at an NaOH concentration of 8.5 M and an aging time of 17.89 hours, yielding a predicted xerogel mass of 0.388 g with a desirability value of 0.891. Confirmation tests demonstrated good agreement between the experimental results and model predictions, thereby confirming the effectiveness of RSM in optimizing the synthesis of silica xerogel from fly ash.
Sintesis dan Karakterisasi Silika Xerogel dari Abu Cangkang Sawit serta Penentuan Luas Permukaannya Menggunakan Metode Adsorpsi Metilen Biru Afdila Nada; Alifea Arpy; Faiqa Haura Tsagifa; Edi Nasra; M.Iqbal Saputra Gemasih
MASALIQ Vol 6 No 1 (2026): JANUARI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v6i1.8940

Abstract

Silica xerogel is a porous material with a high surface area and active silanol and siloxane groups, making it a promising candidate for use as an adsorbent material. This study aimed to synthesize silica xerogel from palm shell ash as an alternative silica source, characterize its functional groups, and determine its surface area using the methylene blue adsorption method. Silica xerogel was synthesized via a sol–gel method followed by a drying process to obtain the xerogel. Functional group characterization was carried out using Fourier Transform Infrared Spectroscopy (FTIR), while the surface area was determined based on methylene blue adsorption analyzed using UV–Vis absorbance data. The results showed that the synthesized silica xerogel possessed characteristic silica functional groups, namely siloxane (Si–O–Si) and silanol (Si–OH). The methylene blue adsorption process showed a decrease in concentration from 25.7912 mg/L to 2.06 mg/L, with an adsorption efficiency of 92%, an adsorption capacity of 5.9328 mg/g, and a silica xerogel surface area of 21.96032 m²/g. These findings indicate that silica xerogel synthesized from palm shell ash has surface characteristics that support the adsorption of cationic dyes and has potential for use as a biomass waste-based adsorbent material.
Co-Authors Adam, Wahyu Ade Elsa Betavia Adia Silvani, Mauline Afdila Nada Afriani, Reza Ahmad Raisan R.P Aini, Syamsi Ali Amran Ali Amran Alifea Arpy Alizar Alizar Alizar, Alizar Amrin . Amrin Amrin Amrin Amrin Ananda Putra Ananda Putra Andini, Namira Tri Anjelia, Mariza Annisa Haqqu Azhma Ulya Baehaqi Bahrizal Bahrizal Bahrizal Bahrizal Bahrizal Bahrizal Bahrizal Bahrizal Bastian, Vadianda Benti Etika, Sri Berlian, Syakhinah Berliana Salsabila Budhi Oktavia Burma, Resna Chairunnisa Chairunnisa Chindikia, Ilmy Cynthia Dela Gustika Della Rosalynna Stiadi Desi Kurniawati Deski Beri Deski Pahdinol Desy Kurniawati DESY KURNIAWATI Desy Kurniawati Desy Kurniawati Desy Kurniawati Desy Kurniawati Desy Kurniawaty Deva Indriyani Devi Lestari Dewi Kristina Dewi Meliati Agustini Dini Anggraini, Dini Dony Yulvi Dwi Hartati Dwi Rahma Doni, Deani Edwina Zainal Eka Yusmita Elvina Elvina Fadhilah Fadhilah Fadilla Yuri Merti Fahilatul Syukro Faiqa Haura Tsagifa Fajriah Azra Fatimah Jora Fatimah Mutiara R, Siti Fatmawati, Rani Fauzan Aulia Akbar Febbi Rahmayuni Febri Andini Putri Fitri Amelia Fitria, Fadhila Geita Yulyan Firel Haqqu, Annisa Hardeli Hardeli Hardeli Hardeli Hary Sanjaya Hary Sanjaya Hary Sanjaya Hayuni, Sri Heditama, Muhammad Raffi Hendrawansyah Putra Hesty Parbuntari Ikhsany, Diva Indang Dewata Isnaeni Isnaeni Jayawarsa, A.A. Ketut Juli Manda Sari Kalmar Nizar, Umar Kasuma Warda Ningsih, Sherly Khairiyah, Ghina Khalisa Khalisa Laura Dwi Rha Hayu Lismawati, Maya M Bachri Amran M. Iqbal S.G M.Iqbal Saputra Gemasih Malinda, Tasya Mauline Adia Silvani Mawardi Mawardi Melida Selvita Miftahul Khair Mila Lusy Tri Nandi Minda Azhar Miranda Dwi Putri Gultom Monika Yulia Mufi Nasda Muhamad Daviya Nur Fauzi Muhammad Farhan Muhammad Patly Muhammad Satrio Hutomo Mulia, Melindra Mutia, Nuraini Cut Nandi, Mila Lusy Tri Nesya Febi Utami Nizar, Umar Kalmar Nofri Yuhelman Nur Hafni Hasibuan Nur Meisinca, Dzulhijjah Nuzulia Yona Oktavia Dewita, Febby Oktria, Wandi Patricia, Popi Pebriani Pebriani Pernadi, Niza Lian Pratama, Rafy Putra, Ananda Putri Fatimah Putri Nugraha Putri, Anisa Dwi Putri, Sinta Eka R, Yoanatul Hasanah Rahadian Zainul Rahayu, Yanna Rahmad, Nafisah Yulia Rahmatika, Aljumaatul Rahmi, Fathaniah Raviqa Ramadhani, Alya Ranti Septiana Ridho Hermawan Riga Riga Riga, Riga Riska Himaylia Putri Riva Silvia Romy Dwipa Yamesa Away Roza Herlina Sabrina, Joya Saddam Husein, Saddam Sari, Trisna Kumala Satrio Prinandito Septian Budiman Serli, Salsabilla Putri Sherly Kasuma Warda Ningsih Sherly Kasuma Warda Ningsih Sherly Kasuma Warda Ningsih Sintha Hafizhah Yonel Siti Fatimah Mutiara R Sri Benti Etika Sri Benti Etika Sukma Bening Fadli Suryani, Okta Sutan M Razali Syamsi Aini Syuhada Yurnas Taufik Hidayat Tessa Faradilla Trihanto Setiadi Trisna Kumala Sari Umar Kalmar Nizar Umar Kalmar Nizar Umar Kalmar Nizar Umar Kalmar Nizar Velly, Aglin Visca Alisia Arianti Wandi Oktria Widya Pasema Yeni, Isra Yeniwati Yeniwati Yollafebrisa Wizul Yollafebrisa Wizul Yulia Mona Liza Yusmaita, Eka Yusuf . Zonalia Fitriza Zul Afkar