Case Studies in Chemical and Environmental Engineering最新文献

{"title":"Advanced approaches to microplastic removal in landfill leachate: Advanced oxidation processes (AOPs), biodegradation, and membrane filtration","authors":"Sarawut Sangkham ,&nbsp;Arunpak Pitakpong ,&nbsp;Rakesh Kumar","doi":"10.1016/j.cscee.2024.101056","DOIUrl":"10.1016/j.cscee.2024.101056","url":null,"abstract":"<div><div>Landfill leachate treatment (LLT) processes contribute to the release of microplastics (MPs) into surface waters during solid waste disposal. These MPs can be transported and accumulate in various environmental compartments. This review highlights studies on the treatment of microplastics in landfill leachates and identifies current mitigation techniques. Feasible methods for reducing microplastics at laboratory and pilot scales include sequencing batch reactors (SBRs), artificial soil filtration (ASF), sand bed filtration (SBF), membrane bioreactors (MBRs) with ultrafiltration (UF), nanofiltration (NF), aerobic bioreactors with UF, membrane bioreactors with activated sludge (AS), and reverse osmosis (RO). The effectiveness of these methods depends significantly on the techniques used for MP extraction and polymer identification. Despite these advancements, the removal of microplastics through leachate treatment plants remains largely underexplored. It is critical to develop novel, efficient, and sustainable strategies for mitigating microplastics from landfill sites. Further research is urgently needed to enhance our understanding of the quantities, shapes, and types of polymers released into the environment through landfill leachate.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101056"},"PeriodicalIF":0.0,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148654","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":"Sustainable photocatalyst fabrication from Silau River-derived SiO2: PVA/TiO2/SiO2 for water purification","authors":"Moraida Hasanah ,&nbsp;Andriono Manalu ,&nbsp;Dian Puspitasari ,&nbsp;Intan Zahar ,&nbsp;Rey Zhulyan ,&nbsp;Naqib Mushlih ,&nbsp;Hilda Ayu Marlina","doi":"10.1016/j.cscee.2024.101059","DOIUrl":"10.1016/j.cscee.2024.101059","url":null,"abstract":"<div><div>Silau River, Indonesia, is a river with areas along its banks used for fishing, factories, and transportation to the sea. The sand from the Silau River is a valuable resource that can be extracted to produce SiO₂, with substantial availability. This study aims to extract SiO₂ from Silau River sand and modify it using PVA and TiO₂ materials as a photocatalyst for water purification. The extraction of SiO₂ from the sand was carried out using the coprecipitation method. The PVA/TiO₂/SiO₂ composite membrane was synthesized by combining a simple mixing technique for filler preparation with mixing and solidification processes to form the composite membrane. Instruments used in this study include a Scanning Electron Microscope-Energy Dispersive X-Ray Spectroscopy (SEM-EDS), Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffractometer (XRD), Differential Scanning Calorimetry (DSC), and UV–Vis Spectroscopy. All characterization results indicate that PVA/TiO₂/SiO₂ has been successfully synthesized in every composition variation. The PVA/80 % TiO₂/20 % SiO₂ composite demonstrated the most effective performance, achieving 65.1 % color degradation in river water within 10 hours. Furthermore, the river water parameters, including TDS, turbidity, pH, Cr, Fe, and Mg, which initially failed to meet quality standards, improved after treatment with this composite, enabling the water to meet the quality standards outlined in Government Regulation No. 22 of 2021 of the Republic of Indonesia concerning the Implementation of Environmental Protection and Management.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101059"},"PeriodicalIF":0.0,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148577","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":"Prospect for pico-hydropower generation from 3D printed Polyethylene Terephthalate Glycol (PETG) Polymer: A Case Study in Pusu River, Malaysia","authors":"Nuranisa Suhada binti Abd Rahim ,&nbsp;Chuan Choong Yang ,&nbsp;Nor Aiman Sukindar","doi":"10.1016/j.cscee.2024.101048","DOIUrl":"10.1016/j.cscee.2024.101048","url":null,"abstract":"<div><div>In Malaysia, rural communities rely on fossil fuel-powered generators for electrification. A small-scale Archimedean Screw Turbine (AST) can be utilized to generate pico-hydropower for potential clean energy generation. However, no study focuses on investigating the strength and torque of 3D printed AST with Polyethylene Terephthalate Glycol (PETG) polymer. Hence, the aim of this work is to investigate the mechanical strength and torque generation of 3D printed PETG AST through Ultimate Tensile Strength (UTS) test and experimental test. UTS test results show that 37.10MPa is the highest tensile strength obtained while 0.0195Nm is the optimum torque generated through AST experimental test.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101048"},"PeriodicalIF":0.0,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148578","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":"Analysis and development of biodegradable organic plastic: Study of chemical properties and sustainable environmental applications","authors":"Waleed N. Al-Darkazali ,&nbsp;Taha Najm Aalhusaini ,&nbsp;Nazar Sattar Harbi","doi":"10.1016/j.cscee.2024.101054","DOIUrl":"10.1016/j.cscee.2024.101054","url":null,"abstract":"<div><div>Plastics are widely used in modern life but pose significant environmental challenges. Petrochemical plastics, made from fossil fuels, contribute to pollution, resource depletion, and greenhouse gas emissions, while also being difficult to recycle and nonbiodegradable. Bio-based plastics, derived from renewable resources, offer an alternative with potential environmental benefits. They perform better in terms of reducing non-renewable energy use and emissions but have drawbacks, such as the environmental impact of raw material production. These plastics also face challenges in waste management and sustainability. Improving bio-based plastics through better design, raw material sourcing, and end-of-life strategies can enhance their environmental performance.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101054"},"PeriodicalIF":0.0,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148653","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":"Fabrication of brick from tannery leather buffing fly ash: Waste-to-wealth approach","authors":"Md Abul Hashem,&nbsp;Md Enamul Hasan Zahin,&nbsp;Md Sanaul Haque,&nbsp;Modinatul Maoya,&nbsp;Md Shohag Milu","doi":"10.1016/j.cscee.2024.101053","DOIUrl":"10.1016/j.cscee.2024.101053","url":null,"abstract":"<div><div>Micro-fined leather buffing dust is an airborne pollutant. In this study, clay was mixed with leather buffing dust fly ash (LBDFA) in various proportions (0 %, 4 %, 8 %, 12 %, 16 %, and 20 %), fabricated brick, dried, and burned in the brickfield at 1000 °C. Results suggested that 12 % LBDFA incorporated brick exhibited weight loss on ignition (5.65 %), area shrinkage (3.96 %), water absorption (15.63 %), compressive strength (16.74 N/mm²), and efflorescence (nil). SEM micrographs depicted composite's micro-fibrous structure creating lightweight brick. The NEN 7345 leaching showed leached metals within standard range. LBDFA in brick production is an alternative option for managing solid waste in tannery.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101053"},"PeriodicalIF":0.0,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148575","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":"Drying of red ginger slices using tray dryer integrated with pyrolysis reactor as a heat source: Evaluation on the drying characteristics, red ginger quality, and drying kinetics","authors":"Rosdanelli Hasibuan ,&nbsp;Bode Haryanto ,&nbsp;Aainaa Izyan binti Nafsun ,&nbsp;Viqry Pramananda ,&nbsp;Fatimah Fahira Siregar ,&nbsp;Risma Fazillah","doi":"10.1016/j.cscee.2024.101055","DOIUrl":"10.1016/j.cscee.2024.101055","url":null,"abstract":"<div><div>Red ginger is one of the medicinal plants that contain gingerol and shogaol. Drying is the post-harvest processing of red ginger, but it requires serious attention. This study evaluated the performance of tray dryer intregated with a pyrolysis reactor in red ginger drying. The best dried red ginger was obtained at 70 °C and a thickness of 0.5 cm, with a moisture content of 9.71 % and two-period drying characteristics. Investigation using SEM-EDS, FTIR, and GC-MS were employed to characterize the red ginger before and after drying. Drying kinetic modelling revealed the Page model as the most suitable model.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101055"},"PeriodicalIF":0.0,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148576","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 cobalt-dispersed sulfated zirconia nanocatalyst for the hydroconversion of used palm cooking oil into bio-jet fuel","authors":"Riska Astin Fitria ,&nbsp;Niko Prasetyo ,&nbsp;Aldino Javier Saviola ,&nbsp;Wega Trisunaryanti ,&nbsp;Akhmad Syoufian ,&nbsp;Amalia Kurnia Amin ,&nbsp;Won-Chun Oh ,&nbsp;Karna Wijaya","doi":"10.1016/j.cscee.2024.101052","DOIUrl":"10.1016/j.cscee.2024.101052","url":null,"abstract":"<div><div>In the past decade, rising demand for air travel has resulted in increased carbon emissions, stimulating research into bio-jet fuel as an eco-friendly aviation alternative. This study examines the synthesis and application of cobalt-dispersed sulfated zirconia nanocatalysts for the hydroconversion of used palm cooking oil into bio-jet fuel under atmospheric conditions. The catalysts were synthesized using the wet impregnation method with varying cobalt loadings (1 %, 3 %, and 5 %) and characterized by FTIR, XRD, NH₃-TPD, SAA, XRF, SEM-EDX Mapping, TEM-SAED, and XPS analyses. Hydroconversion with the Co-3/SZ catalyst yielded a 63.03 wt% liquid product, with 92.28 % bio-jet fuel selectivity and a yield of 58.17 wt%. Reusability tests for six consecutive runs further indicated that this catalyst maintained a bio-jet fuel selectivity of 56.94 % and a yield of 28.43 %, underscoring its potential as a promising candidate for bio-jet fuel production.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101052"},"PeriodicalIF":0.0,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148678","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":"Assessment of natural radioactivity and its radiological risks in the soil of local government areas (Asa, Ilorin East, Ilorin South, Irepodun, Moro, and Oyun) in Kwara State, Nigeria","authors":"Adegbulugbe Samuel Kanmi ,&nbsp;Umaru Ibrahim ,&nbsp;N.G. Goki ,&nbsp;U. Rilwan ,&nbsp;M.I. Sayyed ,&nbsp;Yasser Maghrbi ,&nbsp;Berivan F. Namq ,&nbsp;Laith Ahmed Najam ,&nbsp;Taha Yaseen Wais","doi":"10.1016/j.cscee.2024.101040","DOIUrl":"10.1016/j.cscee.2024.101040","url":null,"abstract":"<div><div>An extensive investigation was undertaken in Kwara State, Nigeria, to evaluate the radioactivity levels in soils across six local government areas, specifically, Asa, Ilorin East, Ilorin South, Irepodun, Moro, and Oyun. Within mining sites in these regions, soil samples (n = 24) were gathered, and ²³⁸U, ²³²Th, and ⁴⁰K's specific activities were quantified via a NaI(Tl) scintillation detector. The data revealed ²³⁸U's specific activity to be in the 4.43–20.06 Bq kg⁻¹ range (average: 10.64 Bq kg⁻¹), and thus below 35 Bq kg⁻¹ as the international recommended threshold. ²³²Th's specific activity was found to be in the 1.44–12.60 Bq kg⁻¹ range (average: 6.61 Bq kg⁻¹), and thus again below the international recommended threshold of 30 Bq kg⁻¹. However, ⁴⁰K's specific activity was in the 325.96–1855.23 Bq kg⁻¹ range (average: 711.26 Bq kg⁻¹), exceeding 400 Bq kg⁻¹ as the recommended threshold. Radiological risk parameters such as Ra_eq were evaluated, with values at the studied sites being less than the UNSCEAR threshold of 370 Bq kg⁻¹. The values of the measured absorbed dose rate were in the 35.02–55.67 nGy h⁻¹ range, and thus below 57 nGy h⁻¹ as the worldwide mean. Statistical analyzes including correlation analysis and principal components analysis were also performed, where the correlation analysis showed a strong association between ⁴⁰K and radiation risk criteria, indicating that an increase in ⁴⁰K levels is associated with an increase in radiation risk. 84.3 % of the variance in the data was explained by the first principal component (PC1) through principal components analysis, which indicates the presence of strong relationships between the studied variables. These results reflect the impact of increasing mining activities on soil pollution in the region, necessitating the need for continuous monitoring to maintain environmental safety and public health.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101040"},"PeriodicalIF":0.0,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148650","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":"Oil palm biomass ash removal for boiler fuel optimization: A case study","authors":"Herman Hidayat ,&nbsp;Fausiah ,&nbsp;Ahsonul Anam ,&nbsp;Sudono ,&nbsp;Erbert Ferdy Destian ,&nbsp;Ilhamsyah Noor ,&nbsp;Abdul Ghofar ,&nbsp;Mochamad Rosjidi ,&nbsp;Rudias Harmadi ,&nbsp;Dorit Bayu Islam Nuswantoro ,&nbsp;Aminuddin ,&nbsp;Rudy Surya Sitorus ,&nbsp;Dadang Rosadi ,&nbsp;Muksin Saleh ,&nbsp;Hariana ,&nbsp;Trisaksono Bagus Priambodo ,&nbsp;Iman ,&nbsp;Umiati ,&nbsp;Hadiyanto","doi":"10.1016/j.cscee.2024.101049","DOIUrl":"10.1016/j.cscee.2024.101049","url":null,"abstract":"<div><div>The growing demand for sustainable energy sources has prompted increased interest in biomass materials, particularly oil palm biomass (OPB), as an alternative to coal for power generation. OPB, derived from oil palm plantations, is abundant in tropical regions and represents a renewable energy resource. However, its high alkali content presents challenges in the form of slagging and fouling in boilers, which can lead to operational inefficiencies and equipment damage. This issue hinders the broader adoption of OPB in energy production, which is crucial for meeting global energy demands while addressing environmental concerns. In this study, OPB particles (&lt;0.86 mm) underwent a 15-min washing treatment using acetic acid and water at a solid-to-liquid ratio of 1:15 to mitigate slagging and fouling risks. Various OPB types, including empty fruit bunches (EFB), shells (SHL), fibers (FBR), fronds (FRD), and trunks (TRK), were examined. The results showed that acetic acid washing removed 44–78 % of the ash content and increased the ash fusion temperature (AFT) by 8.8–14.8 %, compared to 32–50 % ash removal and a 4.2–7.6 % AFT rise with water washing. Both treatments effectively reduced slagging and fouling tendencies, making OPB a more viable and environmentally sustainable alternative for power generation.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101049"},"PeriodicalIF":0.0,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148649","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":"Effects of medical tourism on hospital waste as an important criteria of the green hospital","authors":"Ramin Hayati ,&nbsp;Mohammad Ansarizadeh ,&nbsp;Masoud Yousefi ,&nbsp;Hossein Moein ,&nbsp;Navid Alinejad ,&nbsp;Aida Jasour ,&nbsp;Zahra Aryakian ,&nbsp;Mojgan Alighardashi","doi":"10.1016/j.cscee.2024.101051","DOIUrl":"10.1016/j.cscee.2024.101051","url":null,"abstract":"<div><div>Health tourism is important as one of the goals of economic development for developing countries, which can cause consequences such as increasing the production of medical waste. In this study, the effect of increasing health services in Iran's public and private hospitals for health tourists on the production of medical waste and its related economic and environmental consequences were investigated. The results showed that in the health tourism development scenarios, 5.17 kg/day of medical waste will be produced for each tourist. The proportion of infectious waste in studied hospitals was 48.73 % in average. Providing health services to an average of four health tourists per day in the studied hospitals will lead to an increase in the cost of waste management up to 109,5807 USD/year and the emission of 12,543.6 μg of pollutants resulting from the disinfection of infectious waste. Although the development of health tourism is one of the goals of economic development, it is necessary to pay attention to the environmental consequences and indirect costs caused by it.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"11 ","pages":"Article 101051"},"PeriodicalIF":0.0,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143148574","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}