Case Studies in Chemical and Environmental Engineering最新文献

{"title":"Sustainable corrosion protection: Chitosan/reduced graphene oxide nanocomposite coating derived from palm oil empty fruit bunches on low carbon steel","authors":"Sri Suhartini ,&nbsp;Novita Ainur Rohma ,&nbsp;Andhika Putra Agus Pratama ,&nbsp;Nimas Mayang Sabrina Sunyoto ,&nbsp;Efri Mardawati ,&nbsp;Kasbawati ,&nbsp;Abdul Mudjib Sulaiman ,&nbsp;Afifah Harmayanti ,&nbsp;Femiana Gapsari","doi":"10.1016/j.cscee.2025.101116","DOIUrl":"10.1016/j.cscee.2025.101116","url":null,"abstract":"<div><div>The growing demand for sustainable corrosion protection materials has prompted eco-friendly innovations. This study developed a chitosan/reduced graphene oxide (rGO) nanocomposite coating derived from empty fruit bunches (EFB) for corrosion protection on low carbon steel (LCS). Using a green oxidation-reduction process with KMnO₄ and ZnCl₂ under optimized conditions (temperature, stirring, pH), the rGO was successfully synthesized. The 90 % chitosan/10 % rGO coating achieved a high inhibition efficiency of 90.65 %, reducing corrosion rates by enhancing charge transfer resistance and creating a robust anti-corrosion barrier. This scalable, sustainable solution offers a cost-effective alternative for industrial corrosion protection.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101116"},"PeriodicalIF":0.0,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143147409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of a biocomposite based on Kluwih (Artocarpus camansi) seed starch incorporated with carrageenan as a functional additive and cellulose nanofiber filler","authors":"Fadlan Hidayat ,&nbsp;Eti Indarti ,&nbsp;Rahmi ,&nbsp;Nasrul Arahman","doi":"10.1016/j.cscee.2025.101120","DOIUrl":"10.1016/j.cscee.2025.101120","url":null,"abstract":"<div><div>The widespread use of synthetic plastics causes environmental issues because of their nondegradability. In this study, biocomposite from Kluwih seed starch were incorporated with carrageenan and cellulose nanofiber (CNF) to improve their mechanical properties. CNFs were prepared using the TEMPO method with ultrasonication. The variables included starch (1, 1.5, 2 g), carrageenan (3, 4.5, 6 g), and CNF (0.006, 0.12, 0.18 g). The mechanical properties of the biocomposite were optimized using RSM. Zeta potential analysis confirmed the stability of CNFs, and XRD and FTIR analyses revealed improved crystallinity and functional groups. The tensile strength of the biocomposites was 12.08 kgf/mm², which is suitable for sustainable packaging applications.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101120"},"PeriodicalIF":0.0,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Carbothermic reduction of ilmenite using non-carbonized biomass from palm kernel shell","authors":"Boy Attaurrazaq ,&nbsp;Sri Harjanto ,&nbsp;Reza M. Ulum ,&nbsp;Agung Setiawan ,&nbsp;Adji Kawigraha","doi":"10.1016/j.cscee.2025.101119","DOIUrl":"10.1016/j.cscee.2025.101119","url":null,"abstract":"<div><div>This study aims to utilize non-carbonized palm kernel shell biomass (PKS–B) as reductor in carbothermic reduction of ilmenite (FeTiO₃), comparing its effectiveness to that of activated biomass (PKS-BA). The thermodynamic assessment predicted the iron (Fe) formation with addition of PKS-B at 700 °C. The experimental results indicated that PKS-B could reduce ilmenite to Fe, Fe₂TiO₅, and TiO₂ at 1000 °C, achieving a metallization degree (MD) was 70.9 ± 0.7 %. However, the ilmenite phase remained at 1000 °C by PKS-B. Complete reduction of ilmenite was observed at 1200 °C, resulting in MD was 98.6 ± 0.7 % and 96.6 ± 0.7 % for PKS-B and PKS-BA, respectively.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101119"},"PeriodicalIF":0.0,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143147408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Eco-friendly steelmaking: Exploring the potential of plant-based binder Acacia gum for iron ore pelletizing","authors":"Hassan Koohestani,&nbsp;Jalal Hasanpoor,&nbsp;Behrooz Ghasemi","doi":"10.1016/j.cscee.2025.101110","DOIUrl":"10.1016/j.cscee.2025.101110","url":null,"abstract":"<div><div>In the pelletizing process, a crucial stage in the iron and steel production industry, binders play a significant role. Bentonite, the conventional binder in iron pellet production, contains impurities that can be transferred to the final product, reducing its quality. In recent years, researchers have been seeking suitable substitutes for bentonite. In this research, the effect of <em>Acacia gum</em> (gum arabic) as an organic binder in the pelletizing process has been investigated, and the results have been compared with pellets produced using bentonite. Accordingly, different magnetite pellets were made under various binders and thermal conditions. The X-ray diffraction (XRD) results showed that magnetite was converted to hematite during the calcination process at 1100 °C. In the XRD pattern of samples containing <em>Acacia gum</em>, hematite phase peaks were observed, and no significant impurities were identified. Based on the thermogravimetric analysis (TGA) results, the organic binder was completely decomposed at 300 °C, and at 900 °C, the binder was completely removed from the pellet. In this case, the pellets' strength was due to the particles' sintering. Investigation of the mechanical properties of the pellets showed that pellets containing 2 % bentonite +3 % <em>Acacia gum</em> with compressive strength and dropping number 1.380 kN/pellet and 4.1, respectively, could provide the necessary properties.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101110"},"PeriodicalIF":0.0,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis and characterization of zinc oxide nanoparticles-carbon composite derived from pineapple peel wastes for adsorption of methylene blue from solution and photocatalytic activity","authors":"Salsa Putri Alzura ,&nbsp;Vienna Saraswaty ,&nbsp;Safri Ishmayana ,&nbsp;Yudha Prawira Budiman ,&nbsp;Diana Rakhmawaty Eddy ,&nbsp;Evyka Setya Aji ,&nbsp;Diah Ratnaningrum ,&nbsp;Een Sri Endah ,&nbsp;Hanny Meirinawati ,&nbsp;Henry Setiyanto","doi":"10.1016/j.cscee.2025.101113","DOIUrl":"10.1016/j.cscee.2025.101113","url":null,"abstract":"<div><div>Synthetic dye effluent poses substantial environmental issues due to its toxicity. In this work, a biosorbent derived from pineapple peels and modified with zinc oxide nanoparticles namely ZnONPs/PPWB, was prepared for the removal of cationic dyes, specifically methylene blue (MB), from aqueous solution. The ZnONPs/PPWB composite biosorbent was prepared through a facile green synthesis of zinc oxide nanoparticles utilizing pineapple peel wastes as the source of reducing agent and carbon sources, followed by a calcination at a low temperature of 400 °C for 2 h. The properties of the prepared composite biosorbent were characterized using Brunauer-Emmet-Teller (BET) surface area, scanning electron microscopy (SEM), X-ray diffraction (XRD) and fourier transform infra-red (FTIR) analyses. Several key factors, including pH, initial MB concentration, contact time, and biosorbent dosage as well as photocatalytic activity were investigated. The adsorption of MB on ZnONPs/PPWB is well described by the Freundlich model (R² = 0.9842) and follows the Elovich kinetic model (<strong><em>X</em></strong>² = 0.7390). The calculated maximum adsorption capacity of the ZnONPs/PPWB composite biosorbent (q_max = 65.43 mg/g) was 1.85 folds higher compared to the non-composite biosorbent (PPWB) (q_max = 35.21 mg/g) under the following conditions; adsorbent dose of 10 mg/30 mL, pH 7, and initial MB concentration of 20 mg/L. In addition, under solar irradiation, the composite ZnONPs/PPWB biosorbent exhibited the greater MB removal efficiency than non-irradiated ZnONPs/PPWB. In summary, this work highlights the effectiveness and feasibility of transforming agricultural wastes into ZnONPs/PPWB composite biosorbent for the removal of cationic dyes from wastewater.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101113"},"PeriodicalIF":0.0,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Membrane derived from pineapple biowaste for water filtration in aquaculture environment: Effect of zinc oxide nanoparticle","authors":"Uun Yanuhar ,&nbsp;Heru Suryanto ,&nbsp;Husni Wahyu Wijaya ,&nbsp;Joseph Selvi Binoj ,&nbsp;Aminnudin Aminnudin ,&nbsp;Nico Rahman Caesar ,&nbsp;Azlin Fazlina Osman ,&nbsp;Fajar Nusantara ,&nbsp;Inpita Casuarina Eqisetia Utari","doi":"10.1016/j.cscee.2025.101114","DOIUrl":"10.1016/j.cscee.2025.101114","url":null,"abstract":"<div><div>This study evaluates bacterial cellulose (BC) membranes reinforced with zinc oxide nanoparticles (ZnO-NP) derived from pineapple biowaste. While BC membranes are widely studied, their use in aquaculture and ZnO reinforcement remains underexplored. Membranes were synthesized with 0.25–1.0 wt% ZnO-NP and characterized by SEM, XRD, FTIR, tensile strength, antibacterial activity, filtration efficacy, and analysis using one-way ANOVA. Results showed ZnO-NP enhanced membrane crystallinity and tensile strength, with 0.25 wt% being optimal. The membranes exhibited improved antibacterial activity, reducing bacterial content by 90.6 % and contaminants by 57 %, enhancing water quality for aquaculture and supporting sustainability and the long-term viability of aquaculture.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101114"},"PeriodicalIF":0.0,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143147795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mesoporous aluminosilicate from metakaolin with natural surfactants for waste cooking oil conversion to hydrocarbon fuels via low-temperature pyrolysis","authors":"Nada Nadhifah ,&nbsp;Stella Jovita ,&nbsp;Riki Subagyo ,&nbsp;Diana Inas Utami ,&nbsp;Khawiyatur Riv'ah Agustina ,&nbsp;Holilah Holilah ,&nbsp;Nurul Asikin-Mijan ,&nbsp;Hasliza Bahruji ,&nbsp;Reva Edra Nugraha ,&nbsp;Aishah Abdul Jalil ,&nbsp;Suprapto Suprapto ,&nbsp;Didik Prasetyoko","doi":"10.1016/j.cscee.2025.101111","DOIUrl":"10.1016/j.cscee.2025.101111","url":null,"abstract":"<div><div>The conversion of waste cooking oil to biofuel has been identified as a sustainable route to address energy issues. However, efficient conversion requires advanced catalysts to address challenges such as high acidity and thermal degradation. Sustainable catalyst production relying on naturally occurring materials reduced the overall carbon footprint and operational cost. This study investigates the transformation of kaolin minerals via metakaolinization into highly uniform mesoporous aluminosilicate nanoparticles when employing natural biosurfactants. The saponin extract from the <em>Sapindus rarak</em> plant was employed as a template to control morphology and mesoporosity. Synthesis of mesoporous aluminosilicate catalysts was conducted via sol-gel method to achieve uniform particle sizes (20–40 nm), with a pore volume of 0.55 cm³/g and a surface area of 197.29 m²/g. The catalyst demonstrated high performance with up to ∼99 % WCO conversion and 70 % hydrocarbon selectivity for C11–C14 and C15–C17.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101111"},"PeriodicalIF":0.0,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling the thermal performance of hybrid paraffin-air nanostructure in a heat sink: Effect of atomic ratio of Al2O3 nanoparticles","authors":"Wed khalid Ghanim ,&nbsp;Rassol Hamed Rasheed ,&nbsp;Ahmed Shawqi Sadeq ,&nbsp;Mohammad N. Fares ,&nbsp;Soheil Salahshour ,&nbsp;Rozbeh Sabetvand","doi":"10.1016/j.cscee.2025.101109","DOIUrl":"10.1016/j.cscee.2025.101109","url":null,"abstract":"<div><div>This study investigates the effect of varying atomic ratios (1 %, 3 %, 6 %, and 10 %) of Al₂O₃ nanoparticles on the thermal performance of a hybrid paraffin-air nanostructure in a heat sink, using molecular dynamics simulations. The primary objective is to enhance the thermal properties of phase change materials for efficient energy storage, which is crucial for advancing thermal management systems. The purpose is to optimize nanoparticle concentration and assess how altering the atomic ratio of Al₂O₃ nanoparticles can improve thermal conductivity and heat flux within the phase change material matrix. The results demonstrate that after reaching equilibrium within 20 ns, the total energy of the atomic sample converges to −5990.70 eV, indicating stable atomic oscillations. Notably, increasing Al₂O₃ nanoparticle concentration to 3 % significantly improves the heat flux and thermal conductivity, reaching values of 354.11 W/m² and 405.42 W/m·K, respectively. The radial distribution function analysis shows a decrease in the maximum peak to 3.49 at the 3 % concentration, suggesting that a higher concentration of oxygen atoms in the material could enhance thermal performance. Furthermore, the maximum temperature within the system increases to 934.17 K at the 3 % atomic ratio. The aggregation time at this concentration is 8.11 ns, which decreases to 6.83 ns at a 10 % atomic ratio, further supporting the detrimental impact of nanoparticle aggregation. Notably, a 3 % concentration is found to be optimal for improving performance. These findings show the critical role of Al₂O₃ nanoparticles in enhancing the thermal performance of phase change material-based systems, offering valuable insights into optimal nanoparticle concentration and aggregation for effective thermal management in energy storage applications.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101109"},"PeriodicalIF":0.0,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Molecular mechanisms of microplastic toxicity in coastal sediments of La Guajira Colombia and emerging ecological risks","authors":"Natalia Fuentes Molina,&nbsp;Tatiana M. López Pérez,&nbsp;Yeilis D. Puerta Cerpa","doi":"10.1016/j.cscee.2025.101108","DOIUrl":"10.1016/j.cscee.2025.101108","url":null,"abstract":"<div><div>Coastal zones are unique transition areas connecting terrestrial and marine environments, recognized to be primary transporters of terrestrial-origin polymeric debris into the oceans. This study is the first attempt to understand the molecular mechanisms of microplastic toxicity in sediments of the most active coastal ecosystems of La Guajira and the environmental implications regarding emerging ecological risks, ensuring maximum coverage to estimate the actual load of your accumulation effectively. The four areas studied show an average abundance of 102 ± 7.86 particles/kg, with a wide variation of 39 ± 15.43, 109 ± 25.45, 211 ± 13.17, and 50 ± 29.56 particles/kg found in Riohacha, Dibulla, Manaure, and Uribia, respectively; the microplastic load was estimated on the coast of La Guajira at 14.71 thousand particles/ton annually, which is considered a moderate level of abundance worldwide. The morphology of the microplastics found was dominated by fragments (55.5 %) and films (29.5 %), showing signs of degradation under high radiation, temperature, and salinity conditions, influencing the surface oxidation rate and the adsorption capacity of contaminants that were identified in three types of polymers by Fourier transform infrared spectroscopy (FTIR), of which polypropylene (PP) was the most predominant, followed by polyethylene (PE) with a heterogeneous spatial distribution associated with factors such as tourism, fishing, and urban activities. The ecological risk assessment based on the pollution load index (PLI) showed a low degree of microplastic contamination; however, hazardous polymers such as polystyrene (PS) can contribute to a high Potential Ecological Risk Index (PERI) and a high Polymer Hazard Index (PHI), which poses a risk to biota and human health, generating concern and requiring appropriate control measures to protect marine ecosystems.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101108"},"PeriodicalIF":0.0,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143147412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A sustainable way to prevent oral diseases caused by heavy metals with phytoremediation","authors":"Sana Salehi ,&nbsp;Mahdi Pouresmaieli ,&nbsp;Ali Nouri Qarahasanlou","doi":"10.1016/j.cscee.2025.101106","DOIUrl":"10.1016/j.cscee.2025.101106","url":null,"abstract":"<div><div>Sustainability, food security, and human health. This study builds on previous research [1] and explores the role of phytoremediation, a plant-based, eco-friendly strategy in mitigating heavy metal pollution to achieve Sustainable Development Goal 3 (Good Health and Well-being) while addressing its lesser-known implications for oral and dental health. Through an analysis of seven key metals (copper, lead, zinc, iron, cadmium, arsenic, and mercury), the study identifies 99 plant species classified by their lifespan, light, and water needs, emphasizing perennials for large-scale remediation. Additionally, it highlights the impact of these metals on dental conditions such as caries and enamel hypoplasia. By supporting the establishment of green belts around industrial zones, this research integrates soil restoration with public health improvements, paving the way for future studies to deepen the connections between environmental contamination, phytoremediation, and oral health.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101106"},"PeriodicalIF":0.0,"publicationDate":"2025-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}