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All Journal Journals Mining Engineering : Bina Tambang Jurnal Periodic Jurusan Kimia UNP Sainstek Jurnal Riset Kimia SEMIRATA 2015 KOVALEN: Jurnal Riset Kimia Indonesian Journal of Chemical Science Indonesian Journal of Chemistry JURNAL EKSAKTA PENDIDIKAN (JEP) JURNAL PENDIDIKAN TAMBUSAI Menara Ilmu Jurnal Farmamedika (Pharmamedica Journal) Pelita Eksakta Sainstek : Jurnal Sains dan Teknologi Molluca Journal of Chemistry Education (MJoCE) Hydrogen: Jurnal Kependidikan Kimia PRIMER (Prima Medical Journal) CHEDS: Journal of Chemistry, Education, and Science Jurnal Pijar MIPA MASALIQ: Jurnal Pendidikan dan Sains Menara Pengabdian Jurnal Pengabdian Pada Masyarakat Gudang Jurnal Multidisiplin Ilmu Jurnal Sains dan Kesehatan Jurnal Pendidikan Kimia, Fisika dan Biologi
Edi Nasra
Universitas Negeri Padang
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Variasi Waktu Kontak terhadap Penyerapan Ion Cd2+ Menggunakan Xerogel dari Abu Terbang (Fly Ash) Afriani, Reza; Nasra, Edi
Jurnal Pendidikan Tambusai Vol. 8 No. 2 (2024)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v8i2.15114

Abstract

Kadmium merupakan salah satu logam berat yang sangat berbahaya sehingga perlu diminimalisir keberadaanya dalam lingkungan. Penyerapan menggunakan adsorben xerogel dari abu terbang (fly ash) dipilih sebagai salah satu metode yang efisien. Tujuan dari penelitian ini ialah untuk mengetahui kapasitas serapan ion Cd2+ dari xerogel dengan variasi waktu kontak. Pada penelitian ini menggunakan metoda batch dengan variasi waktu kontak (15, 30, 45, 60, 75) menit. Kondisi optimum yang didapatkan waktu kontak 60 menit dengan kapasitas serapan maksimum 43,99 mg/g. Permodelan isoterm yang mendekati kesetimbangan yaitu isoterm Langmuir dengan nilai R2 = 0,9717.
Adsorpsi Zat Warna Rhodamine B Menggunakan Selulosa Kulit Pisang Kepok (Musa balbisiana Colla) Lismawati, Maya; Nasra, Edi
Jurnal Pendidikan Tambusai Vol. 8 No. 2 (2024)
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Rhodamin B merupakan salah satu zat warna yang sangat berbahaya karena bersifatkarsinogenik dan dapat menyebabkan berbagai penyakit pada tubuh makhluk hidup.Nilai ambang batas untuk konsentrasi Rhodamin B yang diperbolehkan dalam perairansekitar (5-10) mg/L. Adsorpsi merupakan metoda alternatif untuk mengurangikeberadaan zat warna Rhodamin B menggunakan adsorben selulosa kulit pisangkepok. Tujuan dari penelitian ini untuk mengetahui kondisi optimum dan kapasitaspenyerapan dari selulosa kulit pisang kepok. Didapatkan kondisi optimum penyerapanRhodamin B pada waktu kontak 60 menit dengan kapasitas penyerapan sebesar 9,02mg/g.
Penentuan Kondisi Optimum Waktu Aging Pada Sintesis Silika Xerogel Dari Limbah Abu Terbang Cynthia; Edi Nasra
Gudang Jurnal Multidisiplin Ilmu Vol. 2 No. 2 (2024): GJMI - FEBRUARI
Publisher : PT. Gudang Pustaka Cendekia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59435/gjmi.v2i2.282

Abstract

Silika xerogel merupakan silika gel yang dihilangkan kandungan airnya dengan menaikkan suhu dan tekanan. Silika xerogel terdiri dari senyawa silika (SiO2) yang dapat diekstraksi dari abu terbang yang memiliki kandungan silika tinggi. Silika xerogel dapat disintesis dengan metode sol-gel. Proses ini terdiri dari empat tahap yaitu pembentukan sol, gelasi, aging, dan pengeringan. Tahapan aging sangat penting pada metode sol-gel, karena aging dapat mempengaruhi karakteristik dari silika xerogel yang dihasilkan, seperti luas permukaan, morfologi, volume dan ukuran pori, dan densitas silika xerogel. Berdasarkan hasil penelitian, waktu aging optimum pada waktu aging 18 jam dengan luas permukaan 23,005 m2/g dan hasil karakteristik dengan FTIR menunjukkan silika xerogel yang disintesis mengandung gugus silanol pada bilangan gelombang 3435,88 cm-1 dan siloksan pada bilangan gelombang 1039,74 cm-1
Processing Trash Fish into Economically Valuable Animal Feed in Nagari Pilubang, Padang Pariaman Regency Sari, Trisna Kumala; Away, Romy Dwipa Yamesa; Suryani, Okta; Yeni, Isra; Aini, Syamsi; Kurniawati, Desy; Nasra, Edi; Stiadi, Della Rosalynna
Pelita Eksakta Vol 7 No 1 (2024): Pelita Eksakta, Vol. 7, No. 1
Publisher : Fakultas MIPA Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/pelitaeksakta/vol7-iss1/221

Abstract

There has been concealed on the processing of trash fish into animal feed in Nagari Pilubang, Padang Pariaman Regency. The majority of the Pilubang community are fishermen. However, so far the trash fish caught have not been processed properly. Meanwhile, trash fish has the potential to be used as animal feed because it contains high protein. Through this PKM activity, the community receives education and training regarding the application of technology for processing trash fish into animal feed using appropriate technology. The animal feed was made from trash fish is processed using a fermentation process. From the results of this activity, it is known that community knowledge has increased and is very useful for implementation by the community in Nagari Pilubang
The Chemistry Teacher Activities on The Training of Project Based Learning Teaching Materials Digitalisation Suryani, Okta; Sari, Trisna Kumala; Riga, Riga; Mawardi, Mawardi; Yuhelman, Nofri; Nasra, Edi; Velly, Aglin; Rahmad, Nafisah Yulia
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 6 (2024): December 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i6.13495

Abstract

This activity is the second year of community service which is a continuation of training activities and making digital teaching materials to support project-based learning (PjBL) in sekolah penggerak for chemistry teachers in Padang city. This second year of community service activities has the theme of training to digitise project-based learning teaching materials developed at the Chemistry Musyawarah Guru Mata Pelajaran (MGMP) in Padang city. This activity aims to provide direction to Padang city chemistry teachers in implementing digital teaching materials. This community service was carried out in the lecture building of FMIPA Universitas Negeri Padang on 9 August, 16 August, and 23 August 2024. The implementation methods carried out in this community service activity are: (1) conducting a needs analysis, knowing the situation of teachers towards the implementation of PjBL-based learning through questionnaires distributed, (2) delivering material to community service participants related to PjBL and an overview of teaching materials that have been designed using the PjBL learning model explained by the speaker, then (3) delivery of materials and discussions related to differentiated learning with the PJBl learning model, and (4) delivering material related to the digitalisation of project-based teaching materials or PjBL using liveworksheet. The results of the service activities carried out can provide motivation, provide experience, and understanding for Padang city chemistry teachers regarding the digitalisation of project-based learning teaching materials so that chemistry teachers in Padang city can prepare digital chemistry teaching materials, especially with liveworksheets using the PjBL model that can assist learning activities so that learning can run effectively and efficiently in accordance with the demands of the curriculum and the times.
Photodegradation of Crystal Violet Dyes Using Fe2O3/CuO with the Addition of MEA Additive Ramadhani, Alya; Sanjaya, Hary; Nasra, Edi; Amelia, Fitri
KOVALEN: Jurnal Riset Kimia Vol. 12 No. 1 (2026): April Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2026.v12.i1.18047

Abstract

Synthetic dyes, including Crystal Violet (CV), are widely used in the textile and chemical industries and are increasingly released into the environment due to their toxic, mutagenic, and non-biodegradable nature. The purpose of this work is to examine the photocatalytic degradation of CV utilising Fe2O3/CuO heterojunction with monoethanolamine (MEA) as an additive. To maximise its optical and catalytic capabilities, the Fe2O3/CuO photocatalyst was synthesised using different CuO compositions and MEA volumes. Using UV-Visible Diffuse Reflectance Spectroscopy (UV-DRS) and the Kubelka-Munk technique, the band gap energy was determined. According to the findings, the incorporation of CuO did not show a pronounced effect, but it may contribute to the photocatalytic system through interfacial interactions and improved charge transfer within the Fe2O3/CuO structure. The lowest band gap value and optimal composition were found at 20% CuO, which was further reduced by adding 2 mL MEA. Tests of photocatalytic activity were conducted for 120 minutes when exposed to UV and sunshine. The results showed that CV had a high deterioration efficiency, reaching about 53.87% when exposed to sunshine. The creation of a Fe2O3/CuO heterojunction, which enhances charge separation and decreases electron-hole recombination, is responsible for the improved performance, whereas MEA enhances particle distribution and increases surface area. These results suggest that Fe2O3/CuO with MEA is a promising, economical, and eco-friendly photocatalyst for the treatment of wastewater contaminated with dyes.
Identifikasi Mikroplastik Jenis Polystyrene (PS) Menggunakan Metode Wet Peroxide Oxidation (WPO) Sukma Bening Fadli; Mawardi Mawardi; Edi Nasra
MASALIQ Vol 5 No 4 (2025): JULI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i4.6053

Abstract

Polystyrene (PS) microplastics from styrofoam waste are persistent contaminants that are difficult to degrade naturally in aquatic environments and require effective extraction methods for analysis and mitigation. This study aims to determine the optimal conditions of Fe(II) concentration and heating temperature in the Wet Peroxide Oxidation (WPO) method for extracting PS microplastics, as well as to identify their functional groups and elemental composition. The method involved treating polluted water samples using WPO solution consisting of Fe(II) as a catalyst and 30% H₂O₂ as an oxidizing agent, with Fe(II) concentrations of 0.075 M, 0.1 M, and 0.125 M, and heating temperatures of 60°C, 75°C, and 90°C. Microplastic identification was conducted using FTIR and XRF instruments. The results showed that the optimal Fe(II) concentration was 0.125 M, yielding 1.27 grams of microplastics, while the optimal temperature was 60°C, yielding 2.58 grams of microplastics. FTIR characterization confirmed the presence of characteristic PS functional groups, including C-H bending of the benzene ring at 753.22 cm⁻¹ and aliphatic C-H stretching at 2919.27 cm⁻¹, which were also detected in samples from enclosed environments. XRF analysis under optimal conditions indicated that the elemental composition of the extracted microplastics was not entirely pure due to residual contaminants. These findings confirm the effectiveness of the WPO method for extracting PS microplastics under optimized operational conditions.
Pengaruh pH dan Konsentrasi terhadap Adsorpsi Ion Logam Cr³⁺ menggunakan Silika Xerogel dari Abu Terbang Putri Nugraha; Edi Nasra
MASALIQ Vol 5 No 4 (2025): JULI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i4.6319

Abstract

Fly ash, a byproduct of coal combustion produced continuously, poses significant environmental risks if not utilized effectively. Its high silica content presents potential for conversion into silica xerogel, which can function as an adsorbent for heavy metal ions such as Cr³⁺. This study aims to analyze the SiO₂ content in synthesized silica xerogel using X-Ray Fluorescence (XRF) analysis and to determine its optimum adsorption capacity based on variations in pH and Cr³⁺ ion concentration. Optimization was carried out at varying pH levels (2–6) and concentrations (100–300 ppm). XRF analysis revealed that the SiO₂ content in fly ash pretreated with 3M HCl was 54.167%, while the synthesized silica xerogel exhibited an increased SiO₂ content of 69.09%, with a %yield of 54.825%, indicating a relatively high silica purity. Adsorption tests showed maximum adsorption capacity at pH 4 and a Cr³⁺ concentration of 200 ppm, reaching 26.76 mg/g. The adsorption isotherm followed the Langmuir model with a determination coefficient of R² = 0.9509, indicating a strong fit between the model and the experimental data. These findings suggest that silica xerogel derived from fly ash holds promise as an effective adsorbent for heavy metal wastewater treatment. Keywords: Fly Ash; Adsorption; Silica Xerogel; Cr³⁺ Metal Ion; Langmuir Isotherm
Kinetika Adsorpsi Ion Cu²⁺ dengan Adsorben Silika Xerogel dari Abu Terbang Mila Lusy Tri Nandi; Edi Nasra
MASALIQ Vol 5 No 4 (2025): JULI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i4.6591

Abstract

Contamination by heavy metal ions such as Cu²⁺ in water sources poses a serious environmental issue due to their toxic effects on living organisms. This study aims to evaluate the adsorption kinetics of Cu²⁺ ions using silica xerogel synthesized from fly ash. The synthesis was carried out via the sol-gel method, and material characterization was performed using X-Ray Fluorescence (XRF) to determine the silica content. The adsorption process was conducted in batch mode with contact time variations of 30, 60, 90, 120, 150, and 180 minutes. Analysis results showed that the fly ash contained 54.167% silica, and the optimal adsorption capacity was achieved at 150 minutes with a value of 44.982 mg/g. The adsorption kinetics were best described by the pseudo-second-order model, indicated by a coefficient of determination (R²) of 0.99947, suggesting that the adsorption process follows a chemisorption mechanism. These findings imply that silica xerogel derived from fly ash has significant potential as an effective adsorbent for environmental remediation of Cu²⁺ ion contamination.
Kinetika Adsorpsi Zat Warna Malachite Green pada Silika Xerogel Hasil Sintesis Abu Terbang Riska Himaylia Putri; Edi Nasra
MASALIQ Vol 5 No 6 (2025): NOVEMBER
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i6.7620

Abstract

The increasing activity of the textile industry has led to a surge in wastewater containing synthetic dyes such as Malachite Green, which are toxic and resistant to natural degradation. This study aims to investigate the adsorption kinetics of Malachite Green using silica xerogel synthesized from fly ash as an environmentally friendly adsorbent. The synthesis was conducted using the sol-gel method, involving washing with 3 M HCl, extraction with 7 M NaOH, and re-precipitation using HCl until hydrogel formation, followed by drying to produce xerogel. XRF analysis showed an increase in SiO₂ content from 44.06% to 69.09%, indicating successful silica purification. Adsorption tests revealed a maximum capacity of 21.329 mg/g with an optimal contact time of 90 minutes. Kinetic analysis indicated that the adsorption process followed a pseudo-second-order model with an R² value of 0.983, suggesting a chemisorption mechanism involving interactions between silanol groups (-SiOH) on the xerogel surface and dye molecules. These findings demonstrate that fly ash-based silica xerogel has significant potential as an effective, sustainable, and economical adsorbent for dye wastewater treatment in the textile industry.
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