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CHEESA: Chemical Engineering Research Articles
Published by Universitas PGRI Madiun
ISSN : 26148757     EISSN : 26152347     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry
CHEESA: Chemical Engineering Research Articles is scientific journal that publishes articles in the field of Chemical Engineering, Organic Chemistry, Inorganic Chemistry, Analytical Chemistry, Biochemistry, and Physical Chemistry. It is a journal to encourage research publication to research scholars, academicians, professionals and student engaged in their respective field. Author can submit manuscript by doing online submission. Author should prepare their manuscript to the instructions given in Author Guidelines before doing online submission. Template of article can be download in right sidebar. All submissions will be reviewed and evaluated based on originality, technical research, and relevance to journal contributions. Chemical Engineering Research Articles is published by Universitas PGRI Madiun on June and December.
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Articles 97 Documents
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Synthesis of KAl(SO4)2 Solid Coagulants from Used Pots and Beverage Cans Mustikarini, Nanda; Fadlilah, Ilma; Rahayu, Theresia Evila Purwanti Sri
CHEESA: Chemical Engineering Research Articles Vol. 7 No. 2 (2024)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v7i2.17766.84-89

Abstract

Used pots and beverage cans are good sources of aluminum-rich raw materials for the synthesis of potassium aluminum sulfate (KAl(SO4)2), a solid coagulant. The synthesis process includes preparation, dissolution, extraction, sedimentation, and drying. Therefore, this research aimed to determine the characteristics of KAl(SO4)2 synthesized from aluminum pots and beverage cans waste, adjusted to the quality requirements of commercial KAl(SO4)2 according to SNI 06-2102-1991 standard. The materials used were aluminum pots, as well as a mixture of pots and beverage cans, with varying concentrations of 20%, 30%, and 40% KOH solvent. The synthesis results, characterized by XRF (X-ray fluorescence), showed an Al content of 0.001-3%. In addition, the results of the data analysis, adapted to SNI 06-2102-1991 standard for potassium aluminum sulfate, indicated that the synthesis met the required parameters for water-insoluble parts, Fe, Pb, and As, and Al2SO3, which was close to the quality requirements.
Treatment of Textile Industrial Wastewater using Membrane Technology: A Review Amillia, Amillia; Maryudi, Maryudi; Chusna, Firda Mahira Alfiata; Hakika, Dhias Cahya; Rahayu, Aster; Santosa, Imam; Mohammed, Hamad Khudhair
CHEESA: Chemical Engineering Research Articles Vol. 7 No. 2 (2024)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v7i2.19132.90-102

Abstract

Textile industry wastewater is a very complex pollutant-containing waste with high dye intensity, requiring proper and appropriate treatment. Membrane technology is one of the appropriate methods for treating textile wastewater due to several advantages such as environmentally friendly and biopolymer-based processing. Therefore, this review aimed to determine the effectiveness of membrane technology and provide information regarding the appropriate treatment of textile wastewater. The articles subjected to review were obtained from several journal sources such as ScienceDirect, Elsevier, Springer, Google Scholar, and national journals. The results showed that several membranes had been used in textile wastewater treatment, such as PTFE (Polytetrafluoroethylene), PES (Polyethersulfone), Polysulfone-Polyvinyl Pyrrolidone Blend Polymer Composite Membrane, CA (Cellulose Acetate), Cellulose Membrane of Sargassum Sp., polysulfone (PSF), Bacterial Cellulose Membrane, and cellulose acetate propionate (CAP). Furthermore, membrane technology was found to reduce dye pollutants in textile wastewater with the highest coefficient value of approximately 97%.
Crescentia cujete L. Extract as an Substitution Alternative of Oxybenzone in Sunscreen Cream Rahma Diyan Martha; Dara Pranidya Tilarso; Febriana Devi Nur 'Aini; Armita Regina Putri Yulindasari; Hesty Parbuntary
CHEESA: Chemical Engineering Research Articles Vol. 8 No. 2 (2025): In Progress
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v8i2.23034.63-75

Abstract

The use of natural ingredients in sunscreen products is increasingly developed due to safety and eco-friendliness compared to synthetic agents. Therefore, this study aimed to evaluate the physical properties and SPF values of cream formulations containing leaf and fruit extract of Crescentia cujete L. The experimental method included cream formulation, SPF evaluation in vitro using UV-Vis spectrophotometry, and physical quality testing comprising organoleptic, homogeneity, emulsion type, spreadability, adhesion, pH, and viscosity. The results showed that formulation with leaf extract had the highest SPF value of 15.60 (medium protection category), indicating the potential of Crescentia cujete L. leaf as active ingredient in herbal-based sunscreen cream.
Effect of Flow Rate on Hexavalent Chromium Reduction in Electroplating Wastewater Using TiO2 Immobilized Resin Arya Darmawan; Okik Hendriyanto Cahyonugroho; Ram Babu Pachwarya
CHEESA: Chemical Engineering Research Articles Vol. 8 No. 2 (2025): In Progress
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v8i2.23102.76-85

Abstract

This study aims to analyze the effect of flow rate on the reduction of hexavalent chromium (Cr6+) in electroplating wastewater treated with a TiO2-immobilized resin in a continuous fixed-bed reactor. The electroplating wastewater, characterized by Cr6+, was treated with RIPT-TiO2 functioning as a catalyst to enhance the contaminant degradation process. The flow rate was then examined to observe the effect on the reduction of Cr6+ concentration during the reaction. The results showed that increasing the flow rate within the range of 40–70 mL/min affected the reduction of Cr6+, and ultimately influenced the photocatalytic efficiency. The flow rate affected the contact time between the wastewater and the catalyst. The best removal efficiency, reaching 50.83% at 180 minutes, was obtained at a lower flow rate. This study provides important contributions to the development of sustainable and efficient electroplating wastewater treatment technology using a continuous reactor system with a TiO2-immobilized resin.
Hexavalent Chromium Reduction of Artificial Waste Using Resin Immobilized Photocatalyst TiO2 Moch. Andy Wibisono; Euis Nurul Hidayah; Baranitharan Ethiraj; Reffany Choiru Rizkiarna
CHEESA: Chemical Engineering Research Articles Vol. 8 No. 2 (2025): In Progress
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v8i2.23078.86-92

Abstract

Photocatalysis is a process that can be used to reduce hexavalent chromium in wastewater. Therefore, this study aimed to analyze the effect of a semiconductor in the form of Resin Immobilized Photocatalyst (RIP)-TiO2 on the reduction of Cr (VI), as well as the effect of pH and catalyst mass. In the process, RIP-TiO2 was produced using rutile crystal TiO2 and cation resin. The study was conducted in a column bed with continuous flow and UV lamp irradiation. Sampling was performed every 5, 15, 45, and 60 minutes, as well as the use of 30 and 40 g of RIP-TiO2. The statistical results from a Two-Way Analysis of Variance (ANOVA) showed no significant differences in pH variation and catalyst mass. However, the best operating conditions were obtained at pH 5 and a catalyst mass of 40 g with a removal rate of 21.32%. These results suggested that pH adjustment had no significant effect on the reduction of Cr(VI) to Cr(III) using RIP-TiO₂ catalyst in the photocatalytic process. Further studies are needed to evaluate other factors, such as UV light intensity, contact time, and physical characteristics of the catalyst, capable of improving the efficiency of the RIP-TiO₂ system.
Reducing Silica Levels in WTP PLTGU X Wastewater using Rice Husk Filter Membranes Setiorini, Indah Agus; Pratiwi, Indah; Rusnadi, Irawan; Miarti, Amiliza; Faputri, Achmad Faisal; Sari, Dian Kurnia; Negsagis, Reco Rambang Putra
CHEESA: Chemical Engineering Research Articles Vol. 7 No. 2 (2024)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v7i2.15576.103-110

Abstract

During the water demineralization process, silica content is increased due to the failure of the chemical reagent. This shows the need to perform a blowdown action to reduce silica content in the water. Therefore, this research aimed to determine the effectiveness of silica reduction in the Water Treatment Plant (WTP) of PLTGU X by observing the permeate flux values relative to time and operating pressure variables, using ceramic membrane made from rice husk. To achieve the objective, ceramic membrane was made from rice husk additives, with a pore diameter of 365 nm and a surface area of 25 cm². The results showed that the composition ratio of clay, rice husk, and iron powder was 82.5%, 15%, and 2.5%, respectively. Furthermore, ceramic membrane with rice husk additives successfully reduced silica content from 1250 ppb to 890 ppb at a pressure of 1.5 bar and 90 minutes of operation and from 1250 ppb to 710 ppb at 2 bar and 90 minutes of operation. This suggested that wastewater could be processed again in the demineralization plant to produce demineralized water. The best membrane performance in the filtration process was achieved at 90 minutes with a pressure of 2 bar, which successfully reduced silica content by 43.2%, with a permeate flux of 3.44 L/m².
Biofoam Cassava Starch and Sugarcane Bagasse Cellulose with the Addition of Polyvinyl Alcohol and Chitosan Nurul Laila Syarifah; Rully Masriatini; Agus Wahyudi; Muhrinsyah Fatimura
CHEESA: Chemical Engineering Research Articles Vol. 8 No. 2 (2025): In Progress
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v8i2.22973.93-102

Abstract

The persistence of non-biodegradable styrofoam waste is contributing to the development of sustainable packaging materials from renewable resources, such as biofoam from natural biopolymers. Therefore, this study aimed to develop biofoam based on cassava starch and cellulose isolated from sugarcane bagasse, modified with polyvinyl alcohol (PVA) and chitosan. The biofoam was synthesized using a baking process and evaluated for physical and mechanical properties, including water absorption, density, tensile strength, and biodegradability. To examine the effect of formulation, PVA concentrations ranged from 10% to 15%, while chitosan was added at 1.5%, 2.0%, and 2.5%. The result showed that water absorption values ranged from 6.4–14.2%, with densities at 0.370–0.613 g/cm³, tensile strengths 0.030–0.613 MPa, and biodegradability levels 74.4–100% within 14 days. Although the optimal formulation was achieved with 10% PVA and 2.5% chitosan, all samples met the Indonesian National Standard (SNI) for biodegradability, showing potential to replace conventional styrofoam.
Modeling and Simulation of Biomass Gasification with Aspen Plus for Different Types of Local Biomass from Riau Province Asshiyami Zikra; Ricky Okta Yohannes; Faiprianda Assyari Rahmatullah; Hari Rionaldo; Zulfansyah
CHEESA: Chemical Engineering Research Articles Vol. 8 No. 1 (2025)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v8i1.20024.1-12

Abstract

Gasification is a promising technology for electrical energy generation systems in palm oil mills. The syngas components, namely CH4, H2, and CO, produced from gasification can be used as fuel to produce steam, which will be applied in turbine generators to produce electricity. Therefore, this study aimed to simulate and validate a flowsheet model of gasification process for oil palm mill waste using Aspen Plus to achieve an optimal syngas composition, and conduct sensitivity analysis by varying gasification temperature, equivalent ratio, as well as correlating biomass moisture content to syngas composition. Biomass moisture content, equivalent ratio, and gasification temperature are important parameters that affect the chemical composition and heating value of syngas analyzed using the sensitivity analysis method. The results showed that the syngas composition was sensitive to the parameters of temperature, moisture content, and equivalent ratio. The operating conditions of gasification process to obtain a high heating value of syngas include 650?C gasification temperature, 0% moisture content, and 0.2 equivalent ratios.
Fluid Flow Rates Regression in Tank Level Control Puji Rahayu; Khairunisa Betariani; Rachmadi Tutuka; Ari Adrianto; Nurmalasari
CHEESA: Chemical Engineering Research Articles Vol. 8 No. 1 (2025)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v8i1.21400.35-42

Abstract

The industrial production process is closely related to control systems, including level control. This is often used to ensure that fluid in the tank is available in the appropriate amount at each stage of the process. The process typically uses an automatic control system such as a Proportional Integral Derivative (PID) Controller that can help measure the accuracy of the data obtained. Therefore, this study aims to examine the effect of flow rate on fluid level control in a tank using linear, exponential, and logarithmic regression analyses. In the process, the effect of the automatic control system (PID Controller) on fluid flow rate was evaluated. The materials used were a 4 mm solenoid and a pump speed variation in the range of 30-50%. Data on fluid level increase were obtained at 0 (n = 1), 60.27 (n = 30), and 180 seconds (n = 61) as the lower, middle, and upper limits. The results showed that fluid flow rate significantly affected the process of controlling fluid level in the tank, and is influenced by the speed of the pump used. Based on the regression analysis, the evaluation of the PID Controller was still classified as good, because the deviation observed in the reading flow rate data was very small.
DFT-Based Molecular Analysis of Imidazole Derivatives as Additives to Enhance Ionic Conductivity in Polymer Electrolyte Membranes Marvin Pasaribu; Mokhamat Ariefin; Sun Theo Constan Lotebulo Ndruru; Ferdinand Hidayat; Multazam
CHEESA: Chemical Engineering Research Articles Vol. 8 No. 1 (2025)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v8i1.22136.13-22

Abstract

The demand for efficient and stable lithium-ion batteries has driven research on advanced polymer electrolyte membranes (PEM) with improved ionic conductivity. This study investigated imidazole and its derivatives as additives in PEM to enhance battery performance. Using Density Functional Theory (DFT) with the def2-TZVP basis set, key quantum parameters such as HOMO-LUMO energies, energy gap (?Egap), electronegativity (?), softness (?), electron transfer fraction (?N), and net electrophilicity (??) were analyzed. Results showed that imidazole derivatives with electron-withdrawing groups, like acrylate and tosyl, had lower ELUMO and smaller ?Egap, improving lithium ion (Li?) interactions and mobility within the polymer matrix. Additionally, compounds with high ? and ?, such as BTIM and BZIM, enhanced ion stabilization and transport, leading to better electrolyte performance. Thus, modifying imidazole structures through specific substitutions is a promising approach to optimize PEM, supporting the development of more efficient and stable lithium-ion batteries.

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