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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 6 Documents
 1 
Search results for , issue "vol. 9 no. 1 (2026): in progress" : 6 Documents clear
Green Synthesis of CuO-Doped Fe₃O₄ for Degradation of Crystal Violet Dye: RSM-Based Optimization Ady Mara; Fahma Riyanti; Desnelli; Poedji Loekitowati Hariani
CHEESA: Chemical Engineering Research Articles Vol. 9 No. 1 (2026): In Progress
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v9i1.24394.1-14

Abstract

The limitations of CuO photocatalyst include high electron–hole recombination and low charge-transfer efficiency. In this context, doping with Fe3O4 is used to form a heterojunction, which enhances charge separation, increases electron transfer, and imparts magnetic properties for easy separation and reuse of the catalyst. Therefore, this study aimed to synthesize a biphasic CuO/Fe₃O₄ composite using Rhodomyrtus tomentosa leaf extract as a green reducing agent, and evaluate the performance as a photocatalyst for the degradation of Crystal Violet Dye (CVD). Structural, morphological, optical, and magnetic properties were characterized using X-ray diffraction (XRD), scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM–EDX), UV–Vis diffuse reflectance spectroscopy (DRS), and vibrating sample magnetometer (VSM). XRD patterns confirmed the coexistence of CuO and Fe₃O₄ phases, indicating successful composite formation. VSM analysis reported that the composite had magnetic properties with a saturation magnetization and band gap values of 46.92 emu/g and 1.63 eV, respectively. Process optimization was conducted using Response Surface Methodology (RSM) based on Central Composite Design (CCD). The results showed that the quadratic model was the most appropriate and statistically significant model, indicated by a p-value < 0.05 with a coefficient of determination (R2) of 0.9953. In addition, optimization of the degradation process led to CVD degradation efficiency of 98.73% under optimal conditions of initial concentration of 25.4 mg/L, pH 9.5, and irradiation time of 39.4 min with a visible-light radiation source. The composite also reported good reusability, retaining 92.11% of degradation efficiency after five cycles, confirming the potential as a magnetically recoverable, environmentally sustainable photocatalyst for wastewater treatment applications.
Thermoplastic Elastomers of Polystyrene-Based Reinforced with Natural Rubber and Carbon Filler from Oil Palm Empty Fruit Bunches Indah Agus Setiorini; Achmad Faisal Faputri; Rahma Nuryanti; Amiliza Miarti; Muhammad Rasyad Hilmi; Hasrinah Hasbullah
CHEESA: Chemical Engineering Research Articles Vol. 9 No. 1 (2026): In Progress
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v9i1.23348.15-25

Abstract

Polystyrene (PS) has limited resistance to extreme temperatures, often becoming soft, brittle, and losing its elasticity. To address these limitations, the material was modified by adding Natural Rubber (NR) and oil palm empty fruit bunch (OPEFB) carbon filler. Therefore, this research aimed to modify the surface of PS by adding NR and OPEFB carbon filler, followed by analysis of the resulting morphology, thermal stability, and enthalpy change (ΔH) of the composites. The polystyrene grafting with maleic anhydride (PS-g-MA) was carried out at 75 °C for 10 minutes. The composition variations of PS-g-MA/NR/OPEFB carbon filler were (30:65:5) wt%, (30:60:10) wt%, (30:55:15) wt%, (30:50:20) wt%, and (30:45:25) wt%. The highest thermal stability (T5%) was achieved with 10% filler at 363°C. However, morphological analysis showed that increasing the filler content to 20% provides an optimal point in balancing interfacial interaction (maximum adhesion) and phase dispersion, with a ΔH value of -27.86 J/g.
Potato Peel Starch Bioplastics Reinforced with Microcrystalline Cellulose, PVA, and Chitosan: Mechanical, Thermal, and Antibacterial Properties Mochamad Viky Afandy; Andoko; Riduwan Prasetya; Muhammad Faizullah Pasha; Mohammad Sukri bin Mustapa
CHEESA: Chemical Engineering Research Articles Vol. 9 No. 1 (2026): In Progress
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v9i1.24438.26-40

Abstract

The increasing accumulation of petroleum-based plastic waste has led to the development of biodegradable packaging materials from renewable agro-industrial resources. Therefore, this study aims to synthesize biodegradable potato peel starch/polyvinyl alcohol (PPS/PVA) blend bioplastic films reinforced with microcrystalline cellulose (MCC) and functionalized with chitosan. Films were prepared through solution casting with varied MCC contents and characterized for density, tensile properties, crystallinity, thermal stability, morphology, antibacterial activity, and biodegradability. The results showed that an increase in MCC improved film compactness, tensile strength, crystallinity, and surface uniformity, showing stronger interfacial interactions within the polymer matrix. FTIR confirmed enhanced hydrogen bonding among starch, PVA, chitosan, and MCC, while thermal analysis showed improved resistance to degradation. The produced films also exhibited antibacterial activity against Staphylococcus aureus and Escherichia coli, with the highest performance observed at higher MCC loading. Despite reinforcement, the products remained biodegradable in soil. These results show the potential of PPS/PVA blend bioplastic films containing PPS waste as sustainable materials for active packaging applications.
Hybrid Paper Membrane Based on Abaca (Musa textilis) Fibers and Rice Husk Ash Silica Using Citric Acid as a Cross-Linking Agent for the Removal of Dyes and Heavy Metals Ian Kurniawan; Adri Huda; Reisya Ichwani; Dina Nasution; Nasrul Rofiah Hidayati; Noor Haida Mohd Kaus
CHEESA: Chemical Engineering Research Articles Vol. 9 No. 1 (2026): In Progress
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v9i1.24288.41-52

Abstract

The pollution from wastewater containing synthetic dyes and heavy metals is a serious environmental issue in Indonesia. The situation is associated with the lack of locally sourced membranes to simultaneously integrate physical filtration and chemical adsorption mechanisms (filtro-adsorption). Therefore, this research aims to develop a hybrid paper membrane based on abaca (Musa textilis) fiber pulp and rice husk ash silica using citric acid as a cross-linking agent for the removal of methylene blue (MB) dye and heavy metal ions (Cu²⁺ and Pb²⁺) from synthetic wastewater. The methodology required silica extraction from rice husk ash through an alkaline method and modification of the product with 3-aminopropyltriethoxysilane (APTES)s. There was also membrane fabrication with different variations of silica (0–20% of dry fiber weight) and citric acid (0–15%) contents, as well as characterization through X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), and Scanning Electron Microscopy with Energy Dispersive X-ray Spectroscopy (SEM-EDS). The results showed that the optimal membrane with 15% silica and 10% citric acid achieved a water flux of 285 L/m²·h·bar and removal efficiencies of >95% for MB (C₀ = 50 mg/L), 78.5 ± 3.2% for Cu²⁺, and 82.3 ± 2.8% for Pb²⁺ (C₀ = 10 mg/L). The two-way analysis of variance (ANOVA) also confirmed that the variations in silica and citric acid content significantly affected the separation performance (p < 0.05). The results showed that the hybrid membrane derived from abundant local agricultural waste had potential as an environmentally friendly wastewater treatment technology.
Characteristics and Thermal Stability of Biobriquettes Sub-Bituminous Coal and Coconut Shell (Cocos nucifera) Mixture Rizka Wulandari Putri; Rahmatullah; Selpiana; Nyayu Gandasari; Salsabillah Nur Fazrin; Alek Al Hadi; Muhammad Haviz
CHEESA: Chemical Engineering Research Articles Vol. 9 No. 1 (2026): In Progress
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v9i1.24440.53-63

Abstract

Low-grade coal, such as sub-bituminous, is characterized by low calorific value. In this context, combining coal (C) with coconut shell (CS) biomass can upgrade the quality. Therefore, this study aims to analyze the effect of feed ratio and carbonization temperature on improving the biobriquette quality. The processes included preparation, carbonization at 300°C and 400°C, variation in feed ratios, mixing, molding, and drying. Evaluation was conducted for proximate composition, calorific value, combustion rate, and thermal stability characteristics using Thermogravimetric Analysis (TGA) and Differential Thermal Analysis (DTA). The results showed that the biobriquette with 100CS contained 100% CS carbonized at 400°C. Furthermore, it had the best quality, with 5.05% moisture content, 1.83% ash content, 36.11% volatile matter, 57.01% fixed carbon, and a calorific value of 6,075 cal/g. These values met the Indonesian Ministry of Energy Regulation No. 47 of 2006. TGA–DTA analysis showed a total mass loss of 98–99% up to approximately 800°C, featuring the best thermal stability. Based on observation, 100% coconut shell (100CS) provided the best quality. This did not imply that hybrid composition was ineffective. For combustion performance tests, the highest combustion rate was recorded in a mixture of 50C: 50CS, namely 0.3005 g / min. The addition of coal to biomass briquettes aimed to improve combustion performance, specifically through increasing the combustion rate. This suggested that the briquettes are easier to ignite (easy ignition), and heat is generated more quickly. In conclusion, the mixture of coal and coconut shell is suitable for applications that require fast heating, such as cooking activities.
Binary System Adsorption of Methylene Blue and Congo Red Using Magnetic Activated Carbon Tarikh Azis Ramadani; Yusron Khoiru Nadhori; Novi Eka Mayangsari; Alma Vita Sophia; Indah Permata Sari
CHEESA: Chemical Engineering Research Articles Vol. 9 No. 1 (2026): In Progress
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v9i1.25102.64-76

Abstract

Dye pollution is an environmental concern posing significant risks to human health and water quality, showing the need for effective methods to reduce dye concentrations in contaminated water. Therefore, this study aimed to explore the reduction of dye concentration in a binary system through adsorption using magnetic activated carbon derived from durian peel. To assess the properties relevant to adsorption, the adsorbent was characterized using Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy coupled with Energy-Dispersive X-ray Spectroscopy (SEM-EDX), X-ray Diffraction (XRD), Vibrating Sample Magnetometry (VSM), and Brunauer–Emmett–Teller Analysis (BET). The adsorption process was evaluated based on contact time, dose, and pH. The results showed that the reduction in the concentrations of Methylene Blue (MB) and Congo Red (CR) was influenced by contact time, dose, and pH, with an efficiency of approximately 97%. The observed behavior was best described by the pseudo-second-order kinetic model and Langmuir isotherm for MB and CR removal, respectively. However, intraparticle diffusion had no effect on the adsorption process because the C value was greater than 0. This study showed that magnetic activated carbon derived from durian peel possessed promising potential as an effective adsorbent for reducing dye concentration in a binary system.

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