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All Journal Jurnal Periodic Jurusan Kimia UNP Jurnal Riset Kimia Jurnal Zarah Jurnal Penelitian Pendidikan IPA (JPPIPA) Al-Kimia ALCHEMY Jurnal Penelitian Kimia JURNAL PENDIDIKAN TAMBUSAI Jurnal Ilmiah Pendidikan Scholastic Global Conference Index Pelita Eksakta Indonesian Journal of Chemical Science and Technology CHEDS: Journal of Chemistry, Education, and Science Jurnal Pijar MIPA MASALIQ: Jurnal Pendidikan dan Sains International Journal of Innovation in Mechanical Engineering and Advanced Materials Ta'dib Jurnal Pendidikan MIPA
Budhi Oktavia
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Religion Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Social Sciences Other

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Training on Making Teaching Materials in The Form of E-modules Based on Guided Discovery Learning for Teachers of Chemical MGMP Pesisir Selatan Oktavia, Budhi; Guspatni, Guspatni; Fauzi, Ahmad
Pelita Eksakta Vol 7 No 2 (2024): Pelita Eksakta, Vol. 7, No. 2
Publisher : Fakultas MIPA Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/pelitaeksakta/vol7-iss2/251

Abstract

Teachers stated that they wish to be able to produce learning materials and integrate a scientific approach into their implementation and use. Teachers recommend receiving training in the creation of ICT-based teaching materials in order to attain their innovative nature. As a result, we offer training activities to chemistry teachers who are members of the MGMP Chemistry Pesisir Selatan for the creation of teaching materials in the form of e-modules based on Guided Discovery Learning. Teachers will be given information on the main criteria of a teaching material (module), guided discovery learning, e-modules, visual and video editing with computer software, literacy, and other associated ICT skills during this activity.
DESORPSI ION Cu2+ PADA ADSORBEN SILIKA GEL-GPTMS (glycidoxypropyltrimethoxysilane) TERMODIFIKASI SULFONAT Berlian, Syakhinah; Oktavia, Budhi; Nasra, Edi; Mulia, Melindra
CHEDS: Journal of Chemistry, Education, and Science Vol 8, No 2 (2024)
Publisher : Universitas Islam Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/cheds.v8i2.9581

Abstract

Desorpsi adalah tahap di mana molekul, ion atau partikel yang sebelumnya diserap oleh adsorben dilepaskan lagi. Proses ini digunakan untuk meregenerasi adsorben sehingga dapat digunakan kembali. Pada penelitian ini dilakukan desorpsi terhadap kation tembaga yang telah teradsorpsi pada adsorben silika gel-GPTMS yang telah dimodifikasi dengan sulfonat. Penelitian ini bertujuan untuk mengetahui eluen mana yang paling efektif dalam desorbing antara 0,025 M NaCl dan 0,025 M CaCl2. Setelah eluen dengan efisiensi desorpsi yang lebih tinggi telah diidentifikasi, variasi konsentrasi dan laju aliran optimal dilakukan dalam desorpsi kation tembaga. Keberhasilan modifikasi adsorben dan proses desorpsi dan adsorpsi dievaluasi menggunakan FTIR, XRF, titrasi potensiometri, dan AAS. Hasil penelitian menunjukkan bahwa 0,025 M CaCl2 memiliki persentase desorpsi yang lebih tinggi yaitu 95,17% dibandingkan dengan 0,025 M NaCl yang hanya mencapai 59,29%. Pada berbagai konsentrasi CaCl2, dengan kondisi konsentrasi optimal ditemukan pada 0,05 M dengan persentase desorpsi mencapai 100%, dan jumlah Cu2+ yang terdesorpsi adalah 0,1425 mg pada silika gel-GPTMS sulfonat. Oleh karena itu, dapat disimpulkan bahwa ion kalsium berhasil mendesorpsi kation tembaga yang telah teradsorpsi pada silika gel-GPTMS yang dimodifikasi dengan sulfonat.
PENENTUAN KONDISI OPTIMUM DESORPSI KATION Cd2+ DARI ADSORBEN SILIKA GEL-GPTMS TERMODIFIKASI SULFONAT Afifi, Rayhanil; Oktavia, Budhi; Kurniawati, Desy; Putra, Ananda
CHEDS: Journal of Chemistry, Education, and Science Vol 8, No 2 (2024)
Publisher : Universitas Islam Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/cheds.v8i2.9592

Abstract

Silica gel mengandung situs aktif berupa gugus silanol (Si-OH) dan siloksan (Si-O-Si), sehingga berguna untuk proses adsorpsi ion logam. Pada penelitian ini silika GPTMS termodifikasi sulfonat digunakan sebagai adsorben kation kadmium. Proses desorpsi dilakukan untuk menghilangkan kation kadmium dari adsorben Silika GPTMS Sulfonat, sehingga adsorben dapat digunakan kembali. Tujuan dari penelitian ini adalah untuk mengetahui kondisi optimal desorpsi ion Cd2+dengan memvariasikan jenis bahan penyerap, konsentrasi, dan laju alir. Hasil penelitian menunjukkan berat adsorpsi sebesar 0,1853 mg dengan persentase 96,81%. Pada proses desorpsi eluen desorpsi terbaik untuk pelepasan Cd2+ adalah CaCl2 0,025M, dengan persentase desorpsi sebesar 96,49% dengan berat terdesorpsi sebesar 0,1787 mg Cd2+. Pada konsentrasi CaCl2 yang divariasikan, kondisi optimum diperoleh pada konsentrasi 0,05 M dengan persentase desorpsi 100% dan berat terdesorpsi sebesar 0,1793 mg Cd2+. Sedangkan pada laju alir, kondisi optimum diperoleh pada 1 mL/menit dengan persentase desorpsi 100%.
Optimasi Desorpsi Kation Pb2+ dari Adsorben Silika Gel-GPTMS (Glycidoxypropyltrimethoxysilane) Termodifikasi Sulfonat dengan Metode Kolom Auzakiyah, Sabella; Oktavia, Budhi; Sanjaya, Hary; Nizar, Umar Kalmar
Periodic Vol 14, No 2 (2025): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v14i2.133061

Abstract

Silica gel is a material that has two active sides, namely silanol (Si-OH) and siloxane (Si-O-Si) groups, but it is less effective as an adsorbent so it needs to be modified. Modification was carried out by adding sulfonate groups using GPTMS bridging compounds to improve the ability of silica gel to adsorb metal ions, such as Pb²⁺ cations. Characterization was performed using FTIR (Fourier Transform-Infrared) and XRF (X-Ray Fluorescence) to ensure the success of the modification process, while SSA (Atomic Absorption Spectrophotometry) was used to measure the effectiveness of the adsorption and desorption processes. In this study, adsorption and desorption were carried out using the column method. Adsorption of Pb²⁺ cation was carried out using silica gel-GPTMS sulfonate adsorbent at optimum conditions of 20 ppm concentration and pH 3. The process was followed by desorption to determine the optimum conditions, including the type of desorption agent (NaCl and CaCl₂), concentration, and flow rate. The results showed that the optimum conditions were obtained with CaCl₂ desorption agent, with a desorbed weight of 0.1707 mg and a desorption efficiency of 98.67%. The optimum concentration of CaCl₂ was 0.05 M with a desorbed weight of 0.1730 mg and a desorption efficiency of 100%. In addition, the optimum flow rate was 1 mL/min with a desorption percentage of 100%.
Optimization of Tannic Acid Polymerization to Improve the Efficiency of Dye-Sensitized Solar Cells: Effect of Temperature and Monomer Concentration Agustini, Dwi; Hardeli, Hardeli; Oktavia, Budhi; Permatasari, Putri
Jurnal Riset Kimia Vol. 16 No. 2 (2025): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v16i2.823

Abstract

This study investigates the effects of temperature and monomer concentration on tannic acid polymerization to enhance dye-sensitized solar cell (DSSC) efficiency. Tannic acid was polymerized using Trimethylolpropane Triglycidyl Ether (TMPGDE) as a crosslinker, with monomer concentrations of 2, 2.5, and 3 grams and temperatures ranging from 30°C to 110°C. UV-Vis analysis revealed a bathochromic shift in poly-tannic acid, indicating increased light absorption in the 200-800 nm range. FTIR confirmed the formation of new ether groups, signifying successful polymerization. The highest DSSC efficiency (8.984%) was achieved with 2.5 grams of monomer at 50°C, significantly outperforming unpolymerized tannic acid (1.35%). The optimal poly-tannic acid has an average molecular weight of 32,610.1568 and a polymerization degree of 19.182. This research demonstrates the potential of tannic acid polymerization for improving DSSC performance, paving the way for more efficient and cost-effective organic solar cells.
Development of an Acid–Base Module Based on Problem-Based Learning Integrated with TPACK to Improve Senior High School Students’ Learning Outcomes Faradina, Rela; Kurniawati, Desy; Oktavia, Budhi; Alizar
Jurnal Penelitian Pendidikan IPA Vol 11 No 9 (2025): September
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i9.12535

Abstract

The Merdeka Curriculum emphasizes students’ ability to understand and apply their conceptual knowledge to solve contextual problems. This study aims to determine the validity, practicality, and effectiveness of an acid–base module based on problem-based learning integrated with TPACK in improving the learning outcomes of Phase F senior high school (SMA/MA) students. The development model used in this research was the 4-D model. The acid–base module was validated by three chemistry lecturers and two chemistry teachers. The practicality test of the module was conducted by three chemistry teachers and 31 students. The effectiveness of the module in improving learning outcomes was analyzed using the N-gain test. The validity test was analyzed using Aiken’s V, which consisted of content and construct validity, yielding results of 0.89 and 0.91, respectively, both categorized as valid. The practicality results from teachers and students were 98.61% and 86.87%, respectively, both in the high category. The N-gain analysis resulted in a value of g = 0.79, categorized as high. Based on the hypothesis test, the calculated t-value was greater than the critical t-value. These findings confirm that the developed acid–base module based on problem-based learning integrated with TPACK is valid, practical, and effective for significantly enhancing students’ learning outcomes.
Analisis Kadar Logam Fe pada Air Sungai Emas Kampar sesuai SNI 6989-84:2019 Alsa, Dzakma Putri; Oktavia, Budhi
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.v5i4.6627

Abstract

This study is motivated by the critical importance of monitoring river water quality, particularly concerning heavy metal content such as iron (Fe), which poses potential risks to both human health and the environment. The objective of this research is to analyze the concentration of Fe in the water of the Kampar River using the Atomic Absorption Spectrophotometry (AAS) method. Water samples were collected from the Kampar River and subjected to a digestion process prior to measurement using AAS at a wavelength of 248.3 nm. The measurement results produced a calibration curve with a coefficient of determination (R²) of 0.9997, indicating a very strong linear relationship between concentration and absorbance. The analysis revealed that Fe concentrations in the samples ranged from 0.194 to 0.489 mg/L. While some samples exceeded the 0.3 mg/L threshold established by Government Regulation No. 82 of 2001 for Class II water quality, most remained within the permissible range. These findings demonstrate that the AAS method offers high sensitivity and accuracy in detecting Fe content in river water and can serve as a reliable tool for routine water quality monitoring.
Analisis BOD pada Limbah Industri: Perbandingan Kualitas Air di Inlet dan Outlet IPAL Faradila, Putwi Ayu; Oktavia, Budhi
MASALIQ Vol 5 No 5 (2025): SEPTEMBER
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i5.6938

Abstract

This study is motivated by the issue of declining water quality due to increasing demand that is not matched by optimal waste management. The objective of the research is to determine the Biochemical Oxygen Demand (BOD) levels in industrial wastewater by comparing the BOD concentrations at the inlet and outlet points of a wastewater treatment system. A quantitative approach was employed, using two samples obtained through purposive sampling. Data were collected through field observation and analyzed descriptively and quantitatively. The results show a decrease in BOD levels from 3.99 mg/L at the inlet to 3.41 mg/L at the outlet, indicating that the treatment process effectively improves wastewater quality. The main conclusion of the study is that lower BOD levels in a body of water reflect higher oxygen availability, resulting in better water quality that poses less risk to aquatic life and human users. The implications of this research contribute to the existing literature on industrial wastewater BOD analysis and offer recommendations for industries and policymakers to enhance the effectiveness of wastewater treatment systems and implement ongoing water quality monitoring policies. The study also opens opportunities for further research on innovative wastewater treatment technologies and analysis of other water quality parameters such as COD, TSS, and heavy metals.
Analisis Ion Nitrit (NO₂⁻) pada Aplikasi Silika Gel Termodifikasi GPTMS-DMA secara Kromatografi Hayati, Isra; Oktavia, Budhi
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.v5i6.7526

Abstract

The limited research on the use of modified silica gel as a stationary phase in ion chromatography forms the basis of this study, particularly for the analysis of nitrite ions (NO₂⁻), which are toxic and pose risks to both human health and the environment. This study aims to apply glycidoxypropyltrimethoxysilane–dimethylamine (GPTMS–DMA) modified silica gel as a stationary phase in the analysis of nitrite ions. A quantitative experimental method was used, employing nitrite ion samples at concentrations of 100 ppm, 200 ppm, and 300 ppm. The analysis was conducted using a High Performance Liquid Chromatography (HPLC) system equipped with a UV detector and carbonate-based eluents consisting of Na₂CO₃ and NaHCO₃ at concentrations of 0.1 M, 0.05 M, and 0.01 M. The results showed that 0.1 M Na₂CO₃ produced the sharpest chromatogram peaks, highest intensity, and the most stable baseline. The resulting regression equation was y = 0.0093x + 0.1533 with a determination coefficient R² = 0.9939, indicating excellent linearity. The Limit of Detection (LOD) was 33.47 ppm, and the Limit of Quantification (LOQ) was 111.56 ppm, demonstrating adequate sensitivity. The study concludes that GPTMS–DMA silica gel effectively enhances the sensitivity and selectivity of nitrite ion analysis and shows strong potential for further development in the analysis of other inorganic ions.
Aplikasi Penggunaan Resin Silika Gel-GPTMS Termodifikasi Dimetilamina untuk Analisis Ion Klorida (Cl⁻) secara Kromatografi Ion Maharani, Siska; Oktavia, Budhi
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.v5i6.7568

Abstract

The limited use of silica gel as an ion-exchange resin in ion chromatography columns forms the background of this study, despite its high potential as a stationary phase. This research aims to apply glycidoxypropyltrimethoxysilane–dimethylamine (GPTMS–DMA) modified silica gel as an ion-exchange resin in ion chromatography for the analysis of chloride ions (Cl⁻). A quantitative method was employed, using chloride ion concentrations of 100 ppm, 200 ppm, and 300 ppm. The analysis was conducted using High Performance Liquid Chromatography (HPLC) with a column packed with GPTMS–DMA silica gel and a mixed eluent of Na₂CO₃ and NaHCO₃ at concentrations of 0.1 M, 0.05 M, and 0.01 M. The results showed that 0.1 M Na₂CO₃ produced the most optimal chromatogram peaks, with a regression equation of y = 0.0004x and a determination coefficient R² = 0.9733, indicating high linearity. The study concludes that GPTMS–DMA modified silica gel is effective as a stationary phase for chloride ion analysis via ion chromatography and holds strong potential for further development as an ion-exchange resin in broader chemical analysis applications.
Co-Authors Afifi, Rayhanil Afrilia, Yoni Ahmad Fauzi Ali Amran Alizar Alizar, Alizar Alsa, Dzakma Putri Amalia Putri Lubis Ananda Putra Andreas Difa Andromeda Anggraini Mardhatillah, Leonyta Anisa Nahari Auzakiyah, Sabella Ayu Azizah Bahrizal Bahrizal Berlian, Syakhinah Burma, Resna Chindikia, Ilmy Deasy Liestianty Delfitri Delfitri Deni Marlina Desy Kurniawati Desy Kurniawati DESY KURNIAWATI Deva Indriyani Devita Efri Dewi Kristina Dipnorita Retno Ditasya, Hellena Dwi Agustini, Dwi Dwi Putri, Vika Trisna DWI RAMADHANI Edi Nasra Elvina Elvina Elvina Yulistia Erwan Fadhilatu Zikra Fajriah Azra Faradila, Putwi Ayu Faradina, Rela Fauzi, Ahmad Firmansyah Khairul Kamal Fitrah Mey Harmi Siregar Fitri Amelia Fitriningsih, Annisa Guspatni Guspatni Habibur Rahman Dafnaz Hafis, Muhamad Hainunnisa Syafitriza Hardeli Hardeli Hardeli Hardeli Hardeli Harmaiyani, Risky Harnas, Dolla Mulyana Hary Sanjaya Hary Sanjaya Hesty Parbuntari Ibrahim Rahmat Illa Ramadhani Indang Dewata Isra Hayati Kauri, Desrike Khairani - Khairani - Latisma Latisma Ma’a, Yustini Maharani, Siska Marthin, Emmilya Febri Masrid Pikoli Maulana, Febrina Mawardi Meri Novia Nurman Miftahul Khair Miftahul Khair Miftahurrahmi, Miftahurrahmi Minda Azhar Muhammad Amin Muhammad Farhan Mulia, Melindra Mutiara Oksyarni Nahdiah Amin Nilu Gussarsi Nizar, Umar Kalmar Nofri Yuhelman Nur Hafni Hasibuan Parbuntari, Hesty Patricia Helena Pebriani Pebriani Pernadi, Niza Lian Putra, Ananda Putri Fatimah Putri Permatasari, Putri Putri, Hanna Salwa Putri, Reza Athia Putri, Yunisa Anugrah Rahadian Zainul Rahardian Z Rahmi, Fathaniah Raviqa Randy Lesmana Putra Rani Sanjaya Reviana Ervita Riga, Riga Rini Anggraini Rita Sundari Rita Sundari Riva Silvia Romy Dwipa Yamesa Away Sabrina, Joya Sari, Trisna Kumala Septya Anggraini Setiowati, Fiqih Sekar Sherly Kasuma Warda Ningsih Sherly Kasuma Warda Ningsih Sintha Hafizhah Yonel Sri Benti Etika Sri Benti Etika Sri Teguh Priharti Suryelita . Syamsi Aini Syifa Rahma Ayunda Syukro, Fahilatul Takdib, Manajer Jurnal Tarmizi Tarmizi Tarmizi Tarmizi Trihanto Setiadi Ulianas, Alizar Umar Kalmar Nizar Umar Kalmar Nizar Usman Bakar Visca Alisia Arianti Vivi Chaniasi Warni Arfin Wirza, Vitratul Yani Puspita Yani Yanti, Desvila Ramadha Yerimadesi Yona, Nuzulia Rahma yuda pratama Yulia Mona Liza Yunisya, Dinda Yustini Ma’a Zulmariko