Case Studies in Chemical and Environmental Engineering最新文献

{"title":"Influence of pyrolysis conditions on the adsorbent properties of hazelnut shell biochar to remove paracetamol, amoxicillin, and triclosan","authors":"Paula Madariaga-Segovia ,&nbsp;Cristina A. Villamar-Ayala ,&nbsp;Norma Ramos ,&nbsp;Margarita Sánchez-Domínguez ,&nbsp;Roberto Lavín","doi":"10.1016/j.cscee.2025.101251","DOIUrl":"10.1016/j.cscee.2025.101251","url":null,"abstract":"<div><div>This study optimized the production of biochar from hazelnut shells for the adsorption of paracetamol, amoxicillin, and triclosan from water. Biochar was produced under 27 conditions (temperature: 500–900 °C, time: 0.5–2 h, particle size: 150–2000 μm). Physicochemical and instrumental analyses, as well as batch adsorption tests, characterized the samples. Temperature (900 °C) is the most significant factor influencing biochar properties and adsorption performance. Adsorption data fitted well with heterogeneous isotherm models, including the Sips model and multilayer/monolayer models. The maximum adsorption capacities for paracetamol, amoxicillin, and triclosan were 19.973, 2.992, and 2.678 mg/g, respectively. Biochar-based adsorption systems with water treatment applications will be scaled.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101251"},"PeriodicalIF":0.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144480272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Run-of-mine bauxite processing residue recovery from the mining industry for the production of artificial aggregate geopolymer paste","authors":"Fitriana Meilasari ,&nbsp;I.D.A.A. Warmadewanthi ,&nbsp;Yulinah Trihadiningrum ,&nbsp;Januarti Jaya Ekaputri ,&nbsp;Hendri Sutrisno","doi":"10.1016/j.cscee.2025.101249","DOIUrl":"10.1016/j.cscee.2025.101249","url":null,"abstract":"<div><div>Rising global construction demand led to natural aggregate overexploitation and environmental degradation. Using run-of-mine bauxite processing residue (RBPR) as artificial aggregate offers sustainable construction solutions while supporting Sustainable Development Goals No. 9 (Innovation and Infrastructure), 11 (Sustainable Cities), and 12 (Responsible Consumption). RBPR was produced into artificial aggregate geopolymer paste (AAGP) using mold casting and thermal methods. XRD, FTIR, and SEM-EDS analyses confirmed geopolymer essential minerals in AAGP, indicating successful sodium aluminosilicate gel formation, the fundamental binding phase in geopolymers. AAGP compressive strengths exceed 12 MPa, and total CO₂ emissions from its production were 1.786–2.992 kg CO₂/kg material.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101249"},"PeriodicalIF":0.0,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modelling and optimization of carbon dioxide sequestration potential of carbide slag waste","authors":"Manisha Sukhraj Kothari,&nbsp;Ashraf Aly Hassan,&nbsp;Amr El-Dieb,&nbsp;Hilal El-Hassan","doi":"10.1016/j.cscee.2025.101250","DOIUrl":"10.1016/j.cscee.2025.101250","url":null,"abstract":"<div><div>Mineral carbonation (MC) of industrial wastes has gained significant attention as a promising approach for reducing carbon dioxide (CO₂) emissions. This study investigates the wet-phase MC of carbide slag waste at realistic conditions for CO₂ capture and storage. Response Surface Methodology with a central-composite design was employed for optimization and modeling for wet-phase MC of carbide slag waste. Five operational parameters namely temperature, pressure, relative humidity, liquid-to-solid (L/S) ratio, and CO₂ loading rate were analyzed for their individual and interactive effects on CO₂ capture capacity and the reaction kinetics. Further, quadratic models were developed to predict CO₂ capture capacity and time required for 50 % carbonation conversion (time₅₀). The results revealed that the most influential factor was pressure followed by the L/S ratio for CO₂ capture capacity. While time₅₀ was majorly influenced by the CO₂ loading rate and pressure. The quadratic models for CO₂ capture capacity and time₅₀ have an R² value of 0.9863 and 0.9986, respectively. Moreover, the results predicted from the models for both responses were closely aligned with the experimental results. The optimized conditions yielded a maximum CO₂ capture capacity of 11.9 mol kg<strong>⁻¹</strong> at 10 bar pressure, 65 °C, in the presence of 0.2 L/S ratio and 75 % relative humidity in 121 minutes, where 50 % conversion occurs in the first 52 minutes. In conclusion, wet-phase MC of carbide slag represents a promising approach to address both industrial waste utilization and CO₂ reduction. The high CO₂ capture capacity achieved under various experimental conditions demonstrates carbide slag as a viable candidate for large-scale CO₂ capture applications. Furthermore, techno-economic analysis and scalability assessments will be crucial in advancing this approach to industrial relevance.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101250"},"PeriodicalIF":0.0,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144471520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Potential application of a fruit-based natural deep eutectic solvent for water-in-crude-oil emulsification process for enhancing oil recovery and upstream oil applications","authors":"Arafat Husain ,&nbsp;Noran Mousa ,&nbsp;Basim Abu-Jdayil","doi":"10.1016/j.cscee.2025.101244","DOIUrl":"10.1016/j.cscee.2025.101244","url":null,"abstract":"<div><div>The growing demand for oil underscores the importance of efficient tertiary recovery methods. Among these, chemical enhanced oil recovery (CEOR) stands out due to its cost-effectiveness and lower capital investment. Natural deep eutectic solvents (NADES), composed of environmentally friendly and biodegradable components, offer a sustainable alternative to conventional toxic chemicals used in CEOR. This study explores the use of a citric acid/fructose/water NADES formulation for stabilizing emulsions of light crude oil and water, a critical factor for improving oil recovery efficiency. Key variables investigated include the number of moles of water used in NADES preparation, the water dilution ratio, and the molar ratios of citric acid to fructose (CA/Fr) and vice versa (Fr/CA). The study found that although water used in NADES preparation contributes to its structure, its quantity had little effect on emulsion stability. In contrast, optimal water dilution and adjusted CA/Fr molar ratios significantly improved both emulsion stability and viscosity. Injection of the NADES formulation led to effective emulsion stabilization using seawater and brine. Moreover, the NADES injection reduced interfacial tension from 19 to 5.02 mN/m and contact angle from 72° to 30.8°, promoting a water-wet condition favorable for oil displacement. These findings were further validated by rheological tests, which demonstrated increased viscosity and emulsion stability. Overall, this study highlights the potential of NADES as a sustainable, high-performance solvent in CEOR, offering both environmental and operational advantages for future oil extraction technologies.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101244"},"PeriodicalIF":0.0,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The use of recycled corrugated iron as efficient electrodes in a batch electrocoagulation treatment process for the removal of algal and bacterial nutrients from raw water","authors":"Siyanda Yamba ,&nbsp;Nomso C. Hintsho-Mbita ,&nbsp;Nonhlangabezo Mabuba","doi":"10.1016/j.cscee.2025.101246","DOIUrl":"10.1016/j.cscee.2025.101246","url":null,"abstract":"<div><div>The presence of ammonia, nitrates and phosphates in raw water promotes the excessive growth of toxic algal blooms which reduce water quality and cause health risks to aquatic and human life. Hence, batch electrocoagulation parameters were optimized (15V, pH 6, 40 mg/l and 20 min) to remove algal nutrients using a recycled corrugated electrode (50 mm × 150 mm x 0.3 mm) in raw water. The electrode was characterized using FTIR, SEM and EDS. It removed 99 ± 0.6 %, 98 ± 05 %, 89 ± 0.3 %, above 99 % of phosphate, nitrate, ammonia, and bacteria respectively. Electrocoagulation is efficient, removes chemicals, bacteria and it is inexpensive.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101246"},"PeriodicalIF":0.0,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144306641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Energy-water usage and greenhouse gas emissions nexus of the natural rubber industry in Vietnam","authors":"Hong Dao Nguyen Pham ,&nbsp;Takahiro Watari ,&nbsp;Nhu Nguyet Phan ,&nbsp;Minh Duc Tran ,&nbsp;Lan Huong Nguyen ,&nbsp;Masashi Hatamoto ,&nbsp;Kazuaki Syutsubo ,&nbsp;Takashi Yamaguchi","doi":"10.1016/j.cscee.2025.101245","DOIUrl":"10.1016/j.cscee.2025.101245","url":null,"abstract":"<div><div>The natural rubber industry is one of the leading forces in the agro-industry in Vietnam and is expected to expand in response to growing material demands. However, as the industry pursues profit targets, there is also a pressing need to consider its sustainability. One challenge is the lack of detailed information on the life cycle of natural rubber products, particularly regarding energy consumption, which could hinder sustainable practices. Based on an on-site survey of six natural rubber processing companies in the Southeast and Central Highlands of Vietnam, this field research aims to evaluate the sustainability of the natural rubber industry by examining greenhouse gas (GHG) emissions from energy and water consumption throughout the life cycle of all products. Over two years, biogas, wastewater, and sludge samples were collected multiple times from each factory involved in the research and facilitated with both testing the characteristics and components of these samples, as well as calculating their carbon footprint by the 2006 Guidelines of the Intergovernmental Panel on Climate Change (IPCC). GHG emissions from the two most dominant Vietnamese natural rubber products were 589 and 133 kg CO₂eq., respectively, generated from each ton of Standard Vietnamese Rubber (SVR) and Centrifuged Latex (CL) products produced. Our study identified three main sources of GHG emissions in the Vietnamese natural rubber industry: high electricity use during the SVR production process, vast ammonia requirements for the CL production process, and direct CH₄ and CO₂ emissions from the regulation tanks of the wastewater processes. Most surveyed factories have taken significant steps in adopting sustainable practices to reduce their GHG emissions. By combining conventional efforts of factories with GHG emission calculations during this field trip, our research proposes significant energy-saving executions to promote sustainable development in the regional natural rubber industry.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101245"},"PeriodicalIF":0.0,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144239576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cu2O quantum dots redefining photodynamic therapy with one-minute pathogen inactivation under visible light","authors":"Azzah Dyah Pramata ,&nbsp;Farhan Aryo Hutomo ,&nbsp;Febriyansyah Saputra ,&nbsp;Paundra Rizky Pratama ,&nbsp;Taras Geonovive De Yenarosa ,&nbsp;Sutarsis ,&nbsp;Sigit Tri Wicaksono ,&nbsp;Agung Purniawan ,&nbsp;Revianny Nidom ,&nbsp;Shao-Yang Hu","doi":"10.1016/j.cscee.2025.101248","DOIUrl":"10.1016/j.cscee.2025.101248","url":null,"abstract":"<div><div>This work utilizes tailored – Cu₂O quantum dots (QDs) to demonstrate unprecedented pathogen photo-inactivation. The superior ROS production of the QDs synthesized at 180 °C with a size of 8.10 nm resulted in a 99.98 % reduction of MRSA, 99.78 % of <em>Klebsiella pneumoniae</em>, and 98.92 % of SARS-CoV Delta within 1 min under visible light. Cu₂O QDs efficiently reduced 99.25 % viability of 4T1 cancer cells in 15 min while maintaining more than 85 % viability in healthy HEK 293 cells, underlining its selectivity. This finding may establish Cu₂O QDs as the next-generation anti-pathogen agents for advanced photodynamic therapy (PDT), biomedical sterilization, and hospital applications.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101248"},"PeriodicalIF":0.0,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144239577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reclamation of formic acid wastewater by electro-oxidation coupled with UV irradiation (UV/EO)","authors":"Punnika Duangkaew,&nbsp;Songkeart Phattarapattamawong","doi":"10.1016/j.cscee.2025.101247","DOIUrl":"10.1016/j.cscee.2025.101247","url":null,"abstract":"<div><div>The research aims to reclaim formic acid wastewater using UV/EO process, compared with the electro-oxidation (EO). The UV/EO process was more effective in treatment of formic acid wastewater as the COD reduction was higher, compared with the EO alone. In addition, the UV/EO process could decrease TDS via conversion of chloride ions to chlorine. The UV/EO performance highly depended on current density (CD) and contact time, while the role of temperature was minor. The UV/EO performance was greatly enhanced with higher CDs in non-filtrated waters because of less interferences, compared with filtrated waters. Electrodes of BDD and titanium plates were robustness for the UV/EO process. The estimated treatment costs were approximately 0.5, 1.3, and 2.4 US dollar/m³ for CD at 5, 10 and 15 mA/cm², respectively. The UV/EO process has the potential to reclaim formic acid wastewater for non-potable application. The treated water is suitable for reuse in plantation, irrigation, and cleaning, as the total coliform and fecal coliform counts were inactivated to non-detectable levels. However, pH and TDS should be monitored. This is the first study that conducts the UV/EO experiment with industrial formic acid wastewater. The finding indicates that UV/EO is an effective process for reclamation of formic acid wastewater.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101247"},"PeriodicalIF":0.0,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144196387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Solvothermal synthesis of α-MnO2 and Mn2O3 for efficient catalytic dye degradation","authors":"Prasetya Prasetya ,&nbsp;Amir Awaluddin ,&nbsp;Muhdarina Muhdarina ,&nbsp;Edy Saputra ,&nbsp;Amilia Linggawati ,&nbsp;Nurhayati Nurhayati ,&nbsp;Ahmad Fudholi","doi":"10.1016/j.cscee.2025.101242","DOIUrl":"10.1016/j.cscee.2025.101242","url":null,"abstract":"<div><div>The increasing industrial demand for synthetic dyes, particularly in textiles as well as pulp and paper sectors, is a significant factor that intensified environmental pollution due to dye-contaminated wastewater. Therefore, this study aimed to develop efficient manganese oxide-based catalysts for methylene blue (MB) degradation through a one-step solvothermal synthesis route. Phase evolution of the synthesized MnO₂ materials was primarily governed by heating temperature and duration, rather than pH adjustment. Samples A-8 and A-9 of Mn₂O₃ were synthesized at 140 °C for 24 h, while A-10 and A-11 of α-MnO₂ were synthesized at 105 °C for 6 h. The results of morphological analysis showed that A-8 had rod-like structures, while A-9 contained a hierarchical architecture comprising rods and cubes. Acid-treated samples (A-8 and A-11) had higher crystallinity than A-9 and A-10 synthesized under alkaline conditions. The catalytic performance in MB degradation correlated with the presence of Mn³⁺/Mn²⁺ redox pairs and oxygen vacancies, where A-9 presented superior stability across a broad pH range of 1–11. Furthermore, acidic conditions significantly enhanced degradation efficiency compared to systems applying H₂O₂. Fragmentation of MB into simpler molecules confirmed the proposed degradation mechanism. The best performance was achieved using A-9 under 200 mg L^-1 MB, pH 1, 0.007 g L^-1 catalyst, and 30 min reaction time, signifying the potential for practical dye wastewater treatment applications.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101242"},"PeriodicalIF":0.0,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144167320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photochemical synthesis of CdS semiconductor by gas condensate as sulfur source, and evaluation of its photocatalytic property in the degradation of methylene blue dye as a case study","authors":"Amir Azizi ,&nbsp;Kaveh Khosravi ,&nbsp;Pouria Alaei Roozbahani ,&nbsp;Zohreh Farahani","doi":"10.1016/j.cscee.2025.101241","DOIUrl":"10.1016/j.cscee.2025.101241","url":null,"abstract":"<div><div>This study investigated a photochemical synthesis route for CdS particles, utilizing gas condensate extracted from oil wells as a sulfur source due to its high sulfur compound content. To confirm the synthesis and characterize the CdS, common techniques were employed. The photocatalytic performance of the synthesized particles was evaluated in the degradation of methylene blue dye under various conditions. Under optimized conditions the degradation efficiency of dye reached 96 % ± 0.5. This study presents a novel photochemical method for synthesizing CdS and highlights the potential application of its in environmental remediation. The process offers an effective approach for removing sulfur from fuels.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101241"},"PeriodicalIF":0.0,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}