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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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Journal : IPTEK The Journal of Engineering

 1 
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.
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
Analyzing the Performance of Reverse Osmosis Membranes After the Cleaning Process: Case study Performed at PT. XYZ. Afandy, Moh. Azhar; Khatimah, Khusnul; Sawali, Fikrah Dian Indrawati
IPTEK The Journal of Engineering Vol 10, No 2 (2024)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v10i2.a20537

Abstract

PT. XYZ uses a reverse osmosis (RO) system in demin water treatment. One of the weaknesses of the RO system is the formation of fouling on the membrane, which can reduce the performance of the membrane, so it is necessary to carry out an appropriate cleaning process to remove deposits on the surface of the membrane, restore the separation characteristics, and restore the normal capacity of the system. This research aims to examine the effect of cleaning on the performance of reverse osmosis membranes in the PT. XYZ with requirements for reverse osmosis membrane type FILMTEC BW30–400 IG. The research was conducted for 8 weeks by collecting data on the reverse osmosis control box and control room in the form of product flow rate, feed conductivity, and product conductivity. Based on the results of the study, it can be concluded that the effect of cleaning on membrane performance can only extend the life of the membrane and cannot meet the specifications for the working parameters of the reverse osmosis membrane, which can be seen in the salt rejection, salt passage, and flux values obtained in this study.
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