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All Journal JURNAL KIMIA SAINS DAN APLIKASI IPTEK The Journal of Engineering JURNAL INTEGRASI PROSES IJEMS (Indonesian Journal of Environmental Management and Sustainability) Jurnal Ilmiah Teknik Kimia Stannum : Jurnal Sains dan Terapan Kimia Darmabakti : Junal Pengabdian dan Pemberdayaan Masyarakat REACTOR : Journal of Research On Chemistry And Engineering Warta AKAB Jurnal Akademika Kimia Journal of Vocational Studies on Applied Research Jurnal Teknik Kimia dan Lingkungan JPM-AKA Jurnal Teknologi Kimia Mineral Indonesian Journal of Chemical Science Jurnal Akademika Kimia Jurnal Rekayasa Proses
Fikrah Dian Indrawati Sawali
Program Studi Teknik Kimia Mineral, Politeknik Industri Logam Morowali
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Physics Public Health Social Sciences Other

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Effect of Sodium Hydroxide Treatment on Adsorption of Methylene Blue Based on Cellulose Nano Crystals Mustikaningrum, Mega; Adelina, Dina; Indrawati Sawali, Fikrah Dian; Afandy, Moh Azhar
Journal of Vocational Studies on Applied Research Volume 6, Issue 1, Year 2024 (April 2024)
Publisher : Vocational College of Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jvsar.v6i1.22505

Abstract

Methylene blue is one of the dye wastes that dissolve in the aquatic environment that cannot be directly degraded by the environment. If the quantity of this waste is large, it will become a compound that is toxic to the aquatic environment. One of the modern methods used to process this dye waste is adsorption. The adsorption method is a method of binding compounds with the help of adsorbents. One of the renewable adsorbent technologies comes from cellulose. Cellulose is often used because it has active groups that are quite effective in binding certain compounds. In this study, cellulose IV was produced, called nano cellulose crystals. Cellulose generally consists of amorphous and crystalline parts. The cellulose produced is hydrolyzed with sulfuric acid to remove the amorphous part so that only crystalline cellulose is obtained, followed by the help of ultrasonic waves to break the size into a nano form which is expected to have a large surface area. As a result of the hydrolysis stage, the nano cellulose crystals produced have sulfate groups that can bind methylene blue which when dissolved in water becomes cationic. This force is called electrostatic force. Some important stages of cellulose nanocrystal production are alkaline treatment, bleaching, hydrolysis, sonication, and freeze-drying. This study focuses on the effect of NaOH concentration used in alkaline treatment. NaOH in this case functions to dissolve impurities such as hemicellulose and lignin in a biomass. Removal of hemicellulose and lignin greatly affects the yield of cellulose produced. Based on the results of the study using 3,4, and 5% NaOH produced cellulose percentages of 38.7121; 39.7949, and 39.9138%, respectively. Cellulose content ultimately affects the number of active groups that bind methylene blue. The adsorption study evidences this obtained the percentage of removal at each concentration of 67.685; 70.837 and 71.823%. Another objective of this study was also to get the constant value of the extraction rate at each NaOH concentration used in the adsorption process. The values obtained were 0.0029; 0.0032 and 0.0039 m/minute at each NaOH concentration used during the alkaline treatment process.
Ketalization of Glycerol and Acetone to Solketal: Effect of Temperature, Concentration & Mathematical Model Sawali, Fikrah Dian Indrawati; Afandy, Moh Azhar; Mustikaningrum, Mega; Lestary, Rara Ayu
IPTEK The Journal of Engineering Vol 11, No 1 (2025)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v11i1.a22642

Abstract

Solketal is a viable method for using glycerol, a by-product of biodiesel production. This study aims to identify the optimal operating parameters for solketal compounds generated from the glycerol ketalization reaction with acetone by using mathematical models that effectively forecast an appropriate framework for this process. This research consists of three critical phases: the ketalization reaction of glycerol with acetone, the characterization of the result solketal products, and the ketalization reaction utilizing the Amberlite IR 120 Na catalyst. The process begins by introducing glycerol and acetone in a mole ratio of 1:3, followed by mechanical Stirring at 500 rpm. The temperature is regulated using a water bath to maintain a constant reaction temperature under specified conditions of 20 °C, 120 °C, 150 °C, and 180 °C, with catalyst masses of 1%, 3%, 5%, and 7%. The mathematical model used is of exponential and polynomial order 2. The findings indicated that the optimal glycerol conversion of 46.01% was attained at 50 °C, using a 5% catalyst concentration throughout a reaction duration of 120 minutes. Second-order polynomial regression is the most appropriate mathematical model to represent this process.
Batch filtration model of proanthocyanidins purification process from sorghum pericarp extract using polyethersulfone membrane Afandy, Moh. Azhar; Sediawan, Wahyudi Budi; Hidayat, Muslikhin; Susanti, Devi Yuni; Sawali, Fikrah Dian Indrawati; Mustikaningrum, Mega
Jurnal Rekayasa Proses Vol 18 No 1 (2024): Volume 18, Number 1, 2024
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.90292

Abstract

Sorghum is one type of plant rich in polyphenol chemicals, one of which is proanthocyanidin. The goal of this work was to construct a filtration equation model for the purification of proanthocyanidin compounds in sorghum pericarp extracts utilizing ultrafiltration methods at varied transmembrane pressures and molecular weight cut-off values on asymmetric polyethersulfone (PES) membranes. The pressure difference and size of MWCO were used to determine the rate of cake formation induced by fouling and concentration polarization. The model suggested in this work is based on a compressible filtration model that can represent the decrease in permeability values and the cake formation process produced by the compression of particles deposited on the surface of the membrane. The results reveal that the transmembrane pressure and MWCO considerably affect the performance of the proanthocyanidins separation process employing ultrafiltration membrane technology. The higher the transmembrane pressure, the higher the permeation flow rate. The effect of MWCO on permeability varies with the type of membrane and fluid employed. The larger the MWCO, the higher the permeability since the membrane pores are more significant and more accessible for the liquid to pass through. The high transmembrane pressure not only helps the feed flow swiftly through the membrane and overcomes the resistance but also encourages substance accumulation until the bulge component drops, resulting in a blocking mechanism in the surface or pore of the membrane. The batch filtration model suggested in this work exhibits a reasonably good fit, which can be seen from the projected data values using a model that tends to approach the experimental data values and may be employed as a model that depicts the cake-forming process on the membrane surface.
UJI PERFORMA KOMBINASI ZEOLIT TERAKTIVASI DAN ARANG AKTIF PADA PROSES ADSORPSI METILEN BIRU : PENDEKATAN EKSPERIMEN DAN PEMODELAN Afandy, Moh. Azhar; Indrawati Sawali, Fikrah Dian
JURNAL TEKNOLOGI KIMIA MINERAL Vol 4 No 1 (2025): JURNAL TEKNOLOGI KIMIA MINERAL
Publisher : Politeknik ATI Makassaar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61844/jtkm.v4i1.1112

Abstract

Pencemaran air oleh pewarna tekstil seperti metilen biru (MB) merupakan permasalahan lingkungan yang serius dan membutuhkan teknologi pengolahan limbah yang efektif dan ramah lingkungan. Penelitian ini bertujuan mengevaluasi efektivitas kombinasi zeolit teraktivasi dan arang aktif dengan perbandingan 1:1 dalam mengadsorpsi MB dari larutan air limbah. Pengaruh parameter operasional seperti waktu kontak dan konsentrasi awal MB terhadap kapasitas adsorpsi dianalisis secara eksperimental dengan massa adsorben total 1 g serta pH dan suhu yang menyesuaikan dengan kondisi lingkungan. Data hasil adsorpsi kemudian dimodelkan menggunakan kinetika pseudo-first order (PFO), pseudo-second-order (PSO), intraparticle diffusion (IPD) dan model isoterm Langmuir, Freundlich, serta Temkin dengan pendekatan non-linear. Hasil menunjukkan bahwa kapasitas adsorpsi meningkat signifikan pada 10 menit pertama dan mencapai kesetimbangan pada 120 menit. Kapasitas adsorpsi juga meningkat seiring dengan bertambahnya konsentrasi MB (qemax= 13,9183 mg/g) . Evaluasi model kinetika mengungkapkan bahwa model PSO paling sesuai (R2= 0,9998 dan SSE= 0,0045), menunjukkan mekanisme adsorpsi yang didominasi oleh interaksi kimia. Sedangkan model isotherm Freundlich paling cocok (R2=0,9639, dan SSE= 5,5166) untuk menggambarkan adsorpsi pada permukaan heterogen. Penelitian ini mengkonfirmasi bahwa kombinasi zeolit teraktivasi dan arang aktif merupakan adsorben yang efektif dan ekonomis untuk pengolahan limbah tekstil, sekaligus memberikan alternatif pemanfaatan sumber daya lokal yang berkelanjutan di Indonesia.
Model Isotherm Multi Parameter pada Proses Adsorpsi Cr (VI) Menggunakan Arang Kayu Teraktivasi Asam Afandy, Moh. Azhar; Sawali, Fikrah Dian Indrawati
Journal Warta AKAB Vol 49, No 1 (2025): Juli 2025
Publisher : Politeknik AKA Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55075/wa.v49i1.272

Abstract

Arang kayu dapat dimanfaatkan sebagai adsorben karena memiliki luas permukaan spesifik yang besar, struktur pori yang baik, dan kemampuan adsorpsi yang tinggi. Penelitian ini bertujuan untuk mengevalusi performa arang kayu teraktivasi asam dalam proses penghilangan Cr(VI) menggunakan model isotherm tiga parameter. HCl digunakan sebagai aktivator kimia pada proses adsorpsi yang dilakukan secara batch dengan variasi konsentrasi awal Cr(VI) (10-200 mg/L) dan massa adsorben 2,5 g. Beberapa model isotherm tiga parameter yang digunakan antara lain Model isotherm Sips, Toth, Redlich-Peterson dan Koble-Corrigan. Hasil yang diperoleh menunjukkan bahwa proses adsorpsi Cr(VI) yang dievaluasi menggunakan model isotherm multi parameter, cenderung memiliki kecocokan yang baik ketika dideskripsikan menggunakan model isotherm Toth dengan nilai koefisien determinasi (R2) = 0,9984, sum square error (SSE) = 2,15 x 10-8, dan nilai chi-square (x2) = 1,84 x 10-8. Nilai parameter yang diperoleh berdasarkan model isotherm Toth berturut-turut yakni qm = 1,1687 mg/g, KT = 0,0701 L/mg, dan nilai t = 3,7642.
Comprehensive Study on Cr(VI) Adsorption and Regeneration Behavior of Alkali-Treated Wood Charcoal: Isotherms and Kinetics Models Afandy, Moh. Azhar; Sawali, Fikrah Dian Indrawati
IPTEK The Journal of Engineering Vol 11, No 2 (2025)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v11i2.a22804

Abstract

The present study considers the adsorption and regeneration behavior of alkali-treated wood charcoal (WC-NaOH and WC-KOH) for Cr(VI) removal. Adsorption isotherms (Langmuir, Freundlich, Temkin, and Dubinin-Raduskevich) and kinetics (Pseudo-first-order and Pseudo-second-orderare being investigated utilizing a non-linear method that provides precise parameter prediction and mechanism elucidation. The outcomes suggested that both WC-NaOH and WC-KOH exhibit good Cr(VI) removal efficiency, with the Langmuir model best explaining the adsorption phase, indicating single-layer adsorption. The kinetic study revealed that the Pseudo-second-order model aligns remarkably well with the data, thereby affirming that chemical adsorption is the predominant mechanism in consideration.  A comparative analysis revealed that WC-KOH exhibits a higher amount of adsorption than WC-NaOH, attributable to its enhanced larger surface area as well as micro-porous structure.. Regeneration studies showed the possibility of reuse of both adsorbents. It shows the efficiency of alkali-treated wood charcoal for Cr(VI) decontamination and the advantages of non-linear modeling in adsorption experiments
Acid-Activated Natural Clay for Fe(III) Adsorption: An Integrated Study of Mechanisms, Kinetics, and Thermodynamics Afandy, Moh. Azhar; Herliawan, Deden Jajang Harly; Nirwansyah; Sawali, Fikrah Dian Indrawati
Indonesian Journal of Environmental Management and Sustainability Vol. 9 No. 3 (2025): September
Publisher : Magister Program of Material Science, Graduate School of Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/ijems.2025.9.3.143-155

Abstract

The increasing contamination of water by Fe(III) ions from industrial activities, particularly in nickel-producing regions such as Morowali, presents serious environmental and public health concerns. Among various treatment approaches, adsorption stands out as an efficient and cost-effective method, especially using natural clay modified by acid treatment. This study aims to investigate the characterization, adsorption kinetics, and thermodynamic behavior of Fe(III) removal using acid-modified natural clay (NC) derived from Morowali. The clay was activated using sulfuric acid (H2SO4), followed by physicochemical characterization and batch adsorption experiments to assess its removal performance. Adsorption kinetics were analyzed using Pseudo-First Order (PFO), Pseudo-Second Order (PSO), Intraparticle Diffusion (IPD), and Liquid Film Diffusion (LFD) models to elucidate the adsorption mechanism. Furthermore, thermodynamic parameters such as Gibbs free energy (deltaG), enthalpy (deltaH), and entropy (deltaS) were calculated to determine the nature of the adsorption process. The results showed that NC exhibited a considerable adsorption capacity for Fe(III), with PSO providing the best kinetic fit, indicating chemisorption control. Thermodynamic analysis confirmed the spontaneous and endothermic nature of the process. These findings demonstrate the potential of acid-modified clay from Morowali as a low-cost and locally available adsorbent, contributing to sustainable water treatment strategies in industrial regions.
Pengaruh Variasi Waktu dan Kecepatan Pengadukan Terhadap Difusivitas dan Konstanta Reaksi Dengan Proses Ekstraksi Reaktif Az Zahra , Clarisa Hany; Mustikaningrum , Mega; Sawali , Fikrah Dian Indrawati; Mustika, Pra Cipta Buana Wahyu
REACTOR: Journal of Research on Chemistry and Engineering Vol. 4 No. 2 (2023)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v4i2.106

Abstract

The world is experiencing a crisis of scarcity of diesel fuel sources. The B30 program is to develop energy sources by utilizing alternative energy sources to prevent petroleum shortages. This program also supports research, namely making biodiesel using non-edible raw materials. Apart from that, another benefit of this research is to determine the effect of time on the yield of biodiesel production, knowing the effect of stirring speed on the diffusivity constant and reaction speed constant of the reactive extraction process. Biodiesel production in this research uses a reactive extraction process. The raw materials used are mahogany seeds, the solvent is methanol, chloroform as a co-solvent, and KOH as a catalyst. This process uses a temperature of 65°C, reaction time of 40 and 80 minutes, and varying stirring speeds of 200 and 300 rpm. The effect of time with a variable stirring speed of 200 rpm the longer the resulting yield increases, while at a stirring speed of 300 rpm the resulting yield decreases. The yield obtained at 200 rpm stirring was 82.363% (40 minutes), 87.6366% (80 minutes), 84.7605% (40 minutes), and 78.7204 (80 minutes). For the methyl ester diffusion constant, the stirring speed of 200 rpm is 8,20 x 10-8 dm2/minute, while the stirring speed of 300 rpm is 8,17 x 10-8 dm2/minute. The reaction rate constant is 1.99 dm3/mol min.
Pelatihan Penyusunan Bahan Pembelajaran Berbasis Digital di SMA Negeri 1 Bahodopi Afandy, Moh. Azhar; Sawali, Fikrah Dian Indrawati; Albar. J, Muh. Azis; Ardiansah, Ardiansah; Putra, Aditya Perdana; Saputra, Aditya Tri; Rahman, Arif
Darmabakti : Jurnal Pengabdian dan Pemberdayaan Masyarakat Vol 6 No 02 (2025): Darmabakti : Junal Pengabdian dan Pemberdayaan Masyarakat
Publisher : Lembaga Peneliian dan Pengabdian Masyarakat (LPPM) Universitas Islam Madura (UIM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31102/darmabakti.2025.6.02.420-426

Abstract

Peningkatan aktivitas mengajar secara daring terlebih saat masa darurat penyebaran virus COVID – 19 melanda, membuat tenaga pendidik utamanya seorang guru sangat terbantu apabila memiliki kecakapan dalam penggunaan teknologi, untuk menjangkau para murid yang melaksanakan pembelajaran dari rumah. Oleh karena itu, perlu diadakannya peningkatan komptenesi guru dalam bidang digital education sesuai dengan era saat ini. Berdasarkan kendala yang dimiliki mitra yaitu kurangnya keterampilan SDM (guru) dalam mengolah media pembelajaran berbasis digital untuk meningkatkan minat belajar siswa, agar siswa dapat memahami pembelajaran meskipun menggunakan sistem belajar online utamanya di SMA Negeri 1 Bahodopi. Sesuai pelaksanaannya, Kegiatan peningkatan kompetensi guru di SMA Negeri 1 Bahadopi telah terlaksana dengan baik, namun ada beberapa kendala yang diharapi selama kegiatan ini berlangsung yaitu ketidaksesuaian waktu pelaksanaan, materi yang diberikan belum terperinci, serta keterbatasan perangkat pendukung pembuatan video. Sehingga, para peserta yang terdiri dari guru sekolah dan tim pelaksana menggunakan berbagai peralatan yang ada. Demi mendukung kegiatan tersebut berlangsung dengan baik.
Efficiency of FeSO4.7H2O as a Coagulant on Chromium Hexavalent Removal Using Coagulation-Flocculation Process: Optimization Using Response Surface Methodology Pangeran, Andi Baso; Afandy, Moh. Azhar; Sawali, Fikrah Dian Indrawati
Jurnal Teknik Kimia dan Lingkungan Vol. 7 No. 2 (2023): October 2023
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jtkl.v7i2.3560

Abstract

Response Surface Methodology-Central Composite Design (RSM-CCD) is widely employed in the process of optimizing the applications of coagulants for wastewater treatment. The experiment aims to evaluate the effect of the FeSO4.7H2O concentration and settling time on removing the chromium hexavalent (Cr (VI)) from wastewater by coagulation-flocculation using RSM-CCD. This experiment was carried out based on the results of the model and optimization using the RSM-CCD to obtain the removal efficiency of Cr (VI) as well as determine the influence of the concentration of FeSO4.7H2O (X1) and settling time (X2). The RSM-CCD experimental design uses a two-factor and two-level design with 13 experimental runs and 5 center points. Inter-variable regression coefficients are also produced with the elimination of Cr (VI). The ANOVA test results showed a fairly significant figure for the assembled model. The model validation results show that the proposed model is compatible with the experimental results. RSM optimization shows optimum conditions based on experimental FeSO4.7H2O coagulant concentration variables and coagulation time at 150 mg/L coagulant concentration and 60 minutes of time, and the prediction results based on RSM-CCD optimization using Design Expert show the most optimum condition at 165,562 mg/L coagulant concentrations and 60,527 minutes of time.
Co-Authors Adelina, Dina Afandy, Moh. A. Ardiansah, Ardiansah Arif Rahman Az Zahra , Clarisa Hany Clarisa Hany Az Zahra Devi Yuni Susanti Eryan Dwi Krisna Fery Setyawan Firman Aldani Hadiyatni Rita Priyantini Haeril, Haeril Hary Sulistyo Herliawan, Deden Jajang Harly Khatimah, Khusnul Lestary, Rara Ayu Mega Mustikaningrum Mega Mustikaningrum Mega Mustikaningrum Moh. Azhar Afandy Muh. Azis Albar J. Muslikhin Hidayat Mustika, Pra Cipta Buana Wahyu Mustikaningrum , Mega Mustikaningrum, Mega Mustikaningrum, Mega Nirwansyah Nita Widyastuti Pangeran, Andi Baso Pra Cipta Buana Wahyu Mustika Pra Cipta Buana Wahyu Mustika Putra, Aditya Perdana Rara Ayu Lestary Samuel Putra Mandiri Simanullang Saputra, Aditya Tri Sediawan, Wahyudi B. Septiawan, Muhammad Ridwan Simanullang, Samuel Putra Mandiri Susanti, Devi Y. Wahyudi B. Sediawan Wahyudi Budi Sediawan Yudi Siswanto