Case Studies in Chemical and Environmental Engineering最新文献_第2页

Synthesis of Fe-, Co-doped TiO2/vermiculite for enhanced antibiotic adsorption and photocatalytic degradation 铁、共掺杂TiO2/蛭石的合成及其增强抗生素吸附和光催化降解

Case Studies in Chemical and Environmental Engineering Pub Date : 2026-06-01 Epub Date: 2025-12-04 DOI: 10.1016/j.cscee.2025.101305

Vu Van Tu , Nguyen Thi Hue , Hoang Minh Thang , Nguyen Duc Van , Tran Van An , Dinh-Trinh Tran , Nguyen Thi Thanh Hai

{"title":"Synthesis of Fe-, Co-doped TiO2/vermiculite for enhanced antibiotic adsorption and photocatalytic degradation","authors":"Vu Van Tu , Nguyen Thi Hue , Hoang Minh Thang , Nguyen Duc Van , Tran Van An , Dinh-Trinh Tran , Nguyen Thi Thanh Hai","doi":"10.1016/j.cscee.2025.101305","DOIUrl":"10.1016/j.cscee.2025.101305","url":null,"abstract":"<div><div>Herein, Fe-, Co-doped TiO<sub>2</sub> semiconductors dispersed on acid-modified vermiculite were successfully synthesized using sol-gel method. The photocatalytic activity and adsorption capacity of Fe-, Co-doped TiO<sub>2</sub> catalysts were evaluated through the removal of ciprofloxacin antibiotic in water. Fe-, Co-doped TiO<sub>2</sub>/Vermiculite (Ver) were mesoporous materials with specific surface areas of 162.7 m<sup>2</sup>/g (Fe-doped TiO<sub>2</sub>), and 172.7 m<sup>2</sup>/g (Co-doped TiO<sub>2</sub>/Ver). The combination between Fe-, Co-doped TiO<sub>2</sub> and Ver resulted in an improved visible light absorption, with band gap energy decreasing from 3.31 eV (TiO<sub>2</sub>), to 2.02 eV (Fe-doped TiO<sub>2</sub>), and 1.79 eV (Co-doped TiO<sub>2</sub>), enhancing the photocatalytic performance and absorption capacity. The Fe-, Co-doped TiO<sub>2</sub>/Ver achieved 96.1 % of ciprofloxacin (50 mg/L) removal by photocatalytic process. Anions inhibited photocatalytic activity with the following order Cl<sup>−</sup> > H<sub>2</sub>PO<sub>4</sub><sup>−</sup> > I<sup>−</sup>, while HO<sup>•</sup> and h<sup>+</sup> were primary reactive species generated. Adsorption process followed the Freundlich isotherm (R<sup>2</sup> > 0.99) and pseudo-second-order kinetics (R<sup>2</sup> > 0.98), suggesting the involvement of physico-chemical adsorption processes. The photodegradation process adhered to pseudo-first-order kinetics, with a maximum rate constant of 0.43 min<sup>−1</sup>. Co-, Fe-doped TiO<sub>2</sub>/Ver maintained good ciprofloxacin removal efficiencies after three reused cycles, demonstrating its high stability. This study presents a promising approach for removing antibiotic residues from water.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"13 ","pages":"Article 101305"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145737499","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}

引用次数: 0

Design and process optimization of an integrated turbidity removal unit in a pilot-scale continuous-flow system using hybrid coagulants for decentralized water treatment 采用混合混凝剂进行分散式水处理的中试连续流系统综合除浊装置的设计和工艺优化

Case Studies in Chemical and Environmental Engineering Pub Date : 2026-06-01 Epub Date: 2026-01-08 DOI: 10.1016/j.cscee.2026.101327

Jedsada Chuiprasert , Sutthichai Boonprasop , Krittawit Sopawanit , Tinn Intraluk , Natthapong Taithipmathukon , Thotsatham Takkawatakarn , Weerawut Chaiwat

{"title":"Design and process optimization of an integrated turbidity removal unit in a pilot-scale continuous-flow system using hybrid coagulants for decentralized water treatment","authors":"Jedsada Chuiprasert , Sutthichai Boonprasop , Krittawit Sopawanit , Tinn Intraluk , Natthapong Taithipmathukon , Thotsatham Takkawatakarn , Weerawut Chaiwat","doi":"10.1016/j.cscee.2026.101327","DOIUrl":"10.1016/j.cscee.2026.101327","url":null,"abstract":"<div><div>This study investigates a compact pilot-scale continuous-flow system for turbidity removal from raw water, integrating chemical and hydrodynamic optimization. A horizontal sedimentation tank was designed and evaluated under varying conditions, including a hybrid inorganic-organic coagulant-flocculant system using polyaluminum chloride (PAC) and polyacrylamide (PAM), coagulant dosages, influent flow rates, aeration, baffle number, and inclination angle. Response surface methodology (RSM) was used to predict and optimize system performance. Optimization indicated that 45 ppm PAC and 2 ppm PAM achieved the highest turbidity removal efficiency of 94.3 % at a low flow rate of 0.5 L/min with aeration at 300 mL/min. At a moderate flow rate of 1.25 L/min, thirteen baffles set at a 75° inclination provided optimal hydraulic performance, yielding 85.3 % removal. Integration of a gravel-sand-anthracite filtration unit further increased removal to 98.3 %. RSM revealed significant interactions between influent flow rate and baffle configuration, enabling prediction and optimization of overall system performance. Mechanistic analysis illustrated floc formation behavior under different PAC and PAM dosages. By combining chemical optimization, hydraulic design, and multiple unit processes in a compact pilot-scale system, this study demonstrates an effective and adaptable approach for decentralized water treatment, suitable for rural, emergency, or resource-limited environments.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"13 ","pages":"Article 101327"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145977166","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}

引用次数: 0

The effect of the combined process of microfiltration and ozonation on the effluent quality of poultry slaughterhouse wastewater 微滤与臭氧氧化联合处理对家禽屠宰场废水出水水质的影响

Case Studies in Chemical and Environmental Engineering Pub Date : 2026-06-01 Epub Date: 2026-01-17 DOI: 10.1016/j.cscee.2026.101332

Donny Yuslan Cortheo , Rita Purwasih , Budiyono Budiyono , Sutaryo Sutaryo

{"title":"The effect of the combined process of microfiltration and ozonation on the effluent quality of poultry slaughterhouse wastewater","authors":"Donny Yuslan Cortheo , Rita Purwasih , Budiyono Budiyono , Sutaryo Sutaryo","doi":"10.1016/j.cscee.2026.101332","DOIUrl":"10.1016/j.cscee.2026.101332","url":null,"abstract":"<div><div>Poultry slaughterhouses (PSH) face serious challenges in wastewater treatment due to the high volume of wastewater and its pollutant content. This manuscript integrates a literature review with laboratory research to provide a more comprehensive understanding of the topic. Using bibliometric analysis to identify research gaps, the study then experimentally evaluated the system by investigating the synergistic effectiveness of an integrated microfiltration and ozonation system to optimize the quality of PSH wastewater effluent. All combination treatments significantly (p < 0.05) reduced the pollution load compared to the control, except for the BOD value (p > 0.05). Optimal conditions achieved in the treatment A1B3 (20 μm filter + 15 g O<sub>3</sub> for 90 minutes) resulted in a 33.2 % reduction in COD (from 549.33 to 366.67 mg/L) and a 52 % reduction in TSS (from 337.33 to 162.00 mg/L). The smaller filter pore size increased filtration effectiveness and further enhanced the biodegradability of wastewater through partial oxidation. The integrated microfiltration and ozonation system demonstrated significant potential for improving the quality of PSH wastewater effluent. Furthermore, a preliminary techno-economic analysis reveals that the system is highly feasible for industrial-scale application (100 m<sup>3</sup>/day) with an estimated operational cost of USD 0.15/ m<sup>3</sup>, confirming its suitability for resource-limited settings.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"13 ","pages":"Article 101332"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146022510","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}

引用次数: 0

Unlocking value from waste: Which circular economy strategies for municipal solid waste management in North Africa? 从废物中释放价值：北非城市固体废物管理的哪种循环经济战略？

Case Studies in Chemical and Environmental Engineering Pub Date : 2026-06-01 Epub Date: 2026-01-23 DOI: 10.1016/j.cscee.2026.101335

Sarah Ferehoun

{"title":"Unlocking value from waste: Which circular economy strategies for municipal solid waste management in North Africa?","authors":"Sarah Ferehoun","doi":"10.1016/j.cscee.2026.101335","DOIUrl":"10.1016/j.cscee.2026.101335","url":null,"abstract":"<div><div>The excessive use of resources and inappropriate waste management pose a serious environmental threat, highlighting the need to adopt the circular economy strategies and strengthen the commitment of cities. The main objective of the study is to understand and analyze how waste management practices and strategies implemented by African municipalities promote sustainable benefits and value, while remaining consistent with a circular economy approach. The commitment of municipalities to the circular economy has attracted considerable media and academic interest. However, there is still a lack of empirical studies that shed light on ways to achieve this goal and identify the constraints that lead to failure. To fill this gap, this article draws on a large amount of data collected through interviews, document and report analysis, field visits, and meetings with stakeholders in four Moroccan cities. The study analyzes governance and waste management and valorization practices, examining municipal strategies for the circular economy. It also identifies obstacles to value creation in this area. The research emphasizes that, in order to overcome the various barriers and create value from waste, commitment is needed from citizens, municipalities, and delegated companies. This is based on strategies focusing on culture, policies, resources, management, innovation, and technology. Areas for further research and implications for leaders, policymakers, and other stakeholders are also discussed.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"13 ","pages":"Article 101335"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147384593","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}

引用次数: 0

From waste to resource: A system-dynamics analysis of biogas and water reuse synergies in coconut-processing wastewater treatment 从废物到资源：椰子加工废水处理中沼气和水回用协同效应的系统动力学分析

Case Studies in Chemical and Environmental Engineering Pub Date : 2026-06-01 Epub Date: 2026-02-25 DOI: 10.1016/j.cscee.2026.101349

Feli Zulhendri , Antony Simon , Krishna Pagilla

{"title":"From waste to resource: A system-dynamics analysis of biogas and water reuse synergies in coconut-processing wastewater treatment","authors":"Feli Zulhendri , Antony Simon , Krishna Pagilla","doi":"10.1016/j.cscee.2026.101349","DOIUrl":"10.1016/j.cscee.2026.101349","url":null,"abstract":"<div><div>Industrial expansion and increasing water scarcity in Southeast Asia are pushing agro-industrial facilities to adopt wastewater solutions that recover both energy and water at a reasonable cost. Unlike prior theoretical or static techno-economic studies, this study develops a system-dynamics economic model calibrated with five years of operational data from three full-scale coconut-processing membrane bioreactor (MBR) plants.</div><div>The model explicitly couples influent variability, aeration demand, and load-dependent capital and operating expenditure to monthly cost and revenue flows. Four operational configurations were evaluated: baseline treatment, biogas-to-electricity recovery, treated-water reuse, and a combined pathway, together with stress tests that doubled hydraulic and organic loads.</div><div>The central contribution is the introduction of deterministic economic threshold maps, which identify the exact load conditions at which decentralized wastewater systems transition from stable operation to financial stress.</div><div>Across all plants, the combined recovery configuration delivered the strongest performance, reducing net treatment cost by up to 70% while maintaining stability under fluctuating loads and utility tariffs. By integrating long-term industrial data with dynamic simulation and threshold mapping, this work provides a validated, decision-oriented framework for designing decentralized wastewater systems as resilient, resource-positive infrastructure rather than cost centres.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"13 ","pages":"Article 101349"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147384621","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}

引用次数: 0

Dual-mode Mn– and Sn–Silica composites from millet husk: Photoreduction of Cr(VI) and sulphanilamide, adsorptive capture of basic fuchsin 谷子壳双模Mn -和sn -二氧化硅复合材料：Cr（VI）和磺胺的光还原，碱性紫红的吸附捕获

Case Studies in Chemical and Environmental Engineering Pub Date : 2026-06-01 Epub Date: 2026-02-12 DOI: 10.1016/j.cscee.2026.101337

G. Sivasubramanian , Nair J. Anagha , P. Devika , P. Archana , Athul Ravi , K.M. Sreedhar , K.M. Sreekanth , Parthasarathi Bera , Anjali Kaiprathu

{"title":"Dual-mode Mn– and Sn–Silica composites from millet husk: Photoreduction of Cr(VI) and sulphanilamide, adsorptive capture of basic fuchsin","authors":"G. Sivasubramanian , Nair J. Anagha , P. Devika , P. Archana , Athul Ravi , K.M. Sreedhar , K.M. Sreekanth , Parthasarathi Bera , Anjali Kaiprathu","doi":"10.1016/j.cscee.2026.101337","DOIUrl":"10.1016/j.cscee.2026.101337","url":null,"abstract":"<div><div>Biogenic silica extracted from foxtail millet husk has been used as a sustainable matrix for preparing Mn–SiO<sub>2</sub> and Sn–SiO<sub>2</sub> composites with pollutant-specific functionality. Mn incorporation narrows the band gap to ∼3.1 eV and anchors Mn<sup>2+</sup> within the amorphous network, enabling efficient UV-C-driven photoreduction of Cr(VI) and partial oxidative degradation of sulphanilamide. Sn remains surface-localised, generating Lewis-acidic sites that promote chemisorptive uptake of Basic Fuchsin, achieving 94.5% removal at near-neutral pH. Together, these materials address three pollutant classes, heavy metals, antibiotics and cationic dyes, through orthogonal pathways of redox catalysis (Mn–SiO<sub>2</sub>) and adsorption (Sn–SiO<sub>2</sub>), without relying on crystalline order or complex synthesis. Structural and spectroscopic analyses (BET, XRD, FTIR, XPS, and DRS) confirm distinct bonding environments and functional divergence between the two dopants. Kinetic modelling shows pseudo-first-order behaviour for Mn-assisted Cr(VI) reduction and pseudo-second-order adsorption for Sn-assisted dye removal. Although competitive-ion effects, reusability and intermediate toxicity were not evaluated, the results establish a proof-of-concept for designing multifunctional, low-cost composites from agricultural waste. This approach highlights the potential for scalable, application-specific remediation using rural biomass as a silica progenitor.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"13 ","pages":"Article 101337"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147384816","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}

引用次数: 0

Integrated mechanical, environmental, and cost assessment of recycled polypropylene–silica fume concrete under moderate thermal exposure 综合机械，环境和成本评估的回收聚丙烯硅粉混凝土在中等热暴露

Case Studies in Chemical and Environmental Engineering Pub Date : 2026-06-01 Epub Date: 2026-02-21 DOI: 10.1016/j.cscee.2026.101353

Ade Okvianti Irlan , Riska Amalia Anggraini , Stefanny Arentika Panjaitan , Triastuti , Fahmy Hermawan , Amry Dasar , Dahlia Patah

{"title":"Integrated mechanical, environmental, and cost assessment of recycled polypropylene–silica fume concrete under moderate thermal exposure","authors":"Ade Okvianti Irlan , Riska Amalia Anggraini , Stefanny Arentika Panjaitan , Triastuti , Fahmy Hermawan , Amry Dasar , Dahlia Patah","doi":"10.1016/j.cscee.2026.101353","DOIUrl":"10.1016/j.cscee.2026.101353","url":null,"abstract":"<div><div>Concrete production contributes substantially to CO<sub>2</sub> emissions and depletion of natural aggregates. This study investigates concrete incorporating recycled polypropylene (PP) granules as a partial fine-aggregate replacement (0–50%) under moderate thermal exposure (25–200 °C). PP-modified mixtures contained 10% silica fume (SF) by mass of cement, while the control mixture contained no SF. Workability and performance were assessed via slump, density, compressive strength, and splitting tensile strength at 28 days, supported by analysis of variance (ANOVA) and scanning electron microscopy (SEM)-based interfacial transition zone (ITZ) observations. At 25 °C, slump decreased from 97 to 87.33 mm and density declined from 2266.88 to 2044.80 kg/m<sup>3</sup> (−9.8%) as PP increased to 50%. Compressive and splitting tensile strengths reduced from 32.89 to 20.37 MPa and from 2.83 to 1.89 MPa, respectively. After 200 °C exposure, compressive strength retention was 63.87% for the control and 82.94% for the 25% PP–10% SF mixture. SEM indicated more pronounced interfacial discontinuities at higher PP contents. Screening-level life cycle assessment (LCA), unit-cost indicators, and multi-criteria scoring suggest that 10–25% PP (within the fixed 10% SF system) provides the most balanced trade-off among the PP-modified mixtures.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"13 ","pages":"Article 101353"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147384823","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}

引用次数: 0

Comparative evaluation of banana and pineapple peel-derived activated carbons for formaldehyde removal from aqueous solution 香蕉和菠萝皮活性炭去除水溶液中甲醛的比较评价

Case Studies in Chemical and Environmental Engineering Pub Date : 2026-06-01 Epub Date: 2026-05-28 DOI: 10.1016/j.cscee.2026.101412

Jidsucha Darayen , Watcharaporn Charoensuk , Wantana Theerawong , Napat Sriprach , Chanachai Thongchom , Sutha Khaodhiar

{"title":"Comparative evaluation of banana and pineapple peel-derived activated carbons for formaldehyde removal from aqueous solution","authors":"Jidsucha Darayen , Watcharaporn Charoensuk , Wantana Theerawong , Napat Sriprach , Chanachai Thongchom , Sutha Khaodhiar","doi":"10.1016/j.cscee.2026.101412","DOIUrl":"10.1016/j.cscee.2026.101412","url":null,"abstract":"<div><div>This study investigated the preparation of activated carbons from banana peels (BP) and pineapple peels (PP) using potassium hydroxide (KOH) activation for aqueous formaldehyde (HCHO) removal. The prepared activated carbons, denoted as BP-AC and PP-AC, were characterized using scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM–EDX), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), CHN elemental analysis, and Brunauer–Emmett–Teller (BET) surface area analysis. BP-AC exhibited a significantly higher BET surface area (561.2 m<sup>2</sup>/g) and total pore volume (0.286 cm<sup>3</sup>/g) than PP-AC (148.1 m<sup>2</sup>/g and 0.062 cm<sup>3</sup>/g, respectively). Adsorption experiments conducted at HCHO concentrations of 1–10 ppm and contact times of 5–60 min showed that both adsorbents achieved maximum removal performance at 7 ppm. PP-AC exhibited slightly higher rapid adsorption at 5 min, whereas BP-AC demonstrated superior adsorption performance at longer contact times due to its more developed porous structure. These findings demonstrate the potential of agricultural waste-derived activated carbons as sustainable and low-cost adsorbents for low-concentration HCHO removal in aqueous systems.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"13 ","pages":"Article 101412"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148167950","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}

引用次数: 0

Decarbonizing ethylene production via renewable energy electrification: A techno-economic and environmental assessment 通过可再生能源电气化脱碳乙烯生产：技术经济和环境评估

Case Studies in Chemical and Environmental Engineering Pub Date : 2026-06-01 Epub Date: 2026-01-05 DOI: 10.1016/j.cscee.2026.101323

Rachid Klaimi , Sabla Y. Alnouri , Aleksa Miladinović , Mirko Stijepović

{"title":"Decarbonizing ethylene production via renewable energy electrification: A techno-economic and environmental assessment","authors":"Rachid Klaimi , Sabla Y. Alnouri , Aleksa Miladinović , Mirko Stijepović","doi":"10.1016/j.cscee.2026.101323","DOIUrl":"10.1016/j.cscee.2026.101323","url":null,"abstract":"<div><div>The transition to sustainable production in the chemical industry is essential for achieving global decarbonization targets. This study explores the electrification of an ethylene plant by replacing its conventional natural gas (NG) boilers with electric boilers powered by renewable energy sources. Unlike previous works that focus on single-technology substitution, this paper provides a comprehensive, system-level assessment of ethylene plant electrification by comparing integrated scenarios of concentrated solar power (CSP), photovoltaic (PV) solar energy, and wind power. The optimal configuration is evaluated based on economic feasibility, environmental impact, and land requirements, offering a methodology that can be adopted for other energy-intensive petrochemical processes. The analysis reveals that while wind energy presents the lowest cost among the available renewable sources, its significant land footprint poses a major challenge, particularly when direct power supply to electric boilers is required. Conversely, CSP, despite being the most expensive option, offers the advantage of simultaneously generating steam and power, enhancing system efficiency. PV-based electrification, positioned between wind and CSP in terms of cost and land use, presents a balanced alternative. The study also investigates the prospects of supplementing on-site renewable generation with imported clean electricity to overcome land constraints and improve operational resilience. The findings provide valuable insights into the trade-offs between cost, sustainability, and spatial constraints in electrifying ethylene production, and they outline potential pathways toward a low-carbon, robust and scalable future for the petrochemical sector.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"13 ","pages":"Article 101323"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145925615","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}

引用次数: 0

Environmental degradation of plastics containing pro-oxidant additives and their toxicological impact in desert ecosystems 含促氧化添加剂塑料的环境降解及其对沙漠生态系统的毒理学影响

Case Studies in Chemical and Environmental Engineering Pub Date : 2026-06-01 Epub Date: 2025-12-19 DOI: 10.1016/j.cscee.2025.101311

Diya Alsafadi, Mohammad Abu Nuwar, Amani Abdelhadi, Tasnim Alqaruoti, Lama Siwwan, Ahmad Al Amaireh

{"title":"Environmental degradation of plastics containing pro-oxidant additives and their toxicological impact in desert ecosystems","authors":"Diya Alsafadi, Mohammad Abu Nuwar, Amani Abdelhadi, Tasnim Alqaruoti, Lama Siwwan, Ahmad Al Amaireh","doi":"10.1016/j.cscee.2025.101311","DOIUrl":"10.1016/j.cscee.2025.101311","url":null,"abstract":"<div><div>The accumulation of single-use plastic materials poses significant environmental and waste management challenges. Pro-oxidant additive-containing (PAC) plastics have been introduced in many regions to mitigate these impacts. This study examined the abiotic degradation of PAC plastics under accelerated laboratory conditions and in an open-air environment with a hot, dry climate. Residual materials from abiotic degradation were then subjected to aerobic biodegradation in soil, and the final products were evaluated for plant toxicity. Fourier-transform infrared spectroscopy (FT-IR) analysis revealed the formation of acids, ketones, and aldehydes on the polymer surface due to oxidation under accelerated conditions. In open-air exposure, the reduction in weight average molecular weight (Mw) was used to assess degradation. A rapid Mw decrease occurred within the first three months, and after fifteen months, 50 % of the samples showed low Mw (<5.0 kDa). The abiotic residues were subsequently mineralized in soil, achieving 15–20 % biodegradation after 350 days. Samples not pre-exposed to open-air conditions showed only 5 % mineralization, confirming that prior thermal and photo-oxidation enhanced biodegradability. Eco-toxicity tests indicated that the biodegradation products did not affect the growth of the studied plant species.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"13 ","pages":"Article 101311"},"PeriodicalIF":0.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145925673","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}

引用次数: 0