Case Studies in Chemical and Environmental Engineering最新文献

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Nanofiltration of contaminated water and wastewater using membrane modules reconfigured from commercial spiral-wound elements 利用商业螺旋缠绕元件重新配置的膜模块对污染水和废水进行纳滤
Case Studies in Chemical and Environmental Engineering Pub Date : 2025-09-30 DOI: 10.1016/j.cscee.2025.101290
Sandrine Boivin , Tetsuro Ueyama , Norika Tanaka , Tatsumi Shimono , Naoki Ohkuma , Kyoungsoo Park , Takahiro Fujioka
{"title":"Nanofiltration of contaminated water and wastewater using membrane modules reconfigured from commercial spiral-wound elements","authors":"Sandrine Boivin ,&nbsp;Tetsuro Ueyama ,&nbsp;Norika Tanaka ,&nbsp;Tatsumi Shimono ,&nbsp;Naoki Ohkuma ,&nbsp;Kyoungsoo Park ,&nbsp;Takahiro Fujioka","doi":"10.1016/j.cscee.2025.101290","DOIUrl":"10.1016/j.cscee.2025.101290","url":null,"abstract":"<div><div>Submerged nanofiltration (NF) membrane treatment can be an attractive approach for water purification because advanced drinking water treatment can be performed at a low energy consumption without pre-treatment. This pilot-scale study aimed to evaluate the feasibility of employing flat-sheet NF membrane modules, adapted from commercial 4-inch spiral-wound elements, to scale up the direct NF treatment of polluted water for the first time. The pilot-scale submerged NF systems operated at a transmembrane pressure of approximately 50 kPa, directly filtering municipal secondary-treated wastewater and zoo pond water as feed sources for over 46 and 99 days, respectively. The initial permeate flux for the secondary-treated wastewater effluent was 1.1 L/m<sup>2</sup>h, which was half of the 2.0 L/m<sup>2</sup>h flux for the zoo pond water. This discrepancy is attributed to the high salinity (e.g., high osmotic pressure difference) of the secondary-treated wastewater effluent. Over time, the permeate flux gradually declined due to membrane fouling but eventually stabilized for both feed waters. Despite variations in the quality of the feed water during the experiments, the permeate quality met high water quality standards. This study highlights the potential of direct NF treatment using reconfigured commercial NF membrane modules for sustainable urban water cycle management.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101290"},"PeriodicalIF":0.0,"publicationDate":"2025-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219183","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
Purification of oil produced water using ceramic membrane: an experimental and response surface model analysis 陶瓷膜净化采出水的实验及响应面模型分析
Case Studies in Chemical and Environmental Engineering Pub Date : 2025-09-27 DOI: 10.1016/j.cscee.2025.101288
Mansour Al-Haddabi , Hari Vuthaluru , Hussein Znad , Mingjie Chen , Mushtaque Ahmed
{"title":"Purification of oil produced water using ceramic membrane: an experimental and response surface model analysis","authors":"Mansour Al-Haddabi ,&nbsp;Hari Vuthaluru ,&nbsp;Hussein Znad ,&nbsp;Mingjie Chen ,&nbsp;Mushtaque Ahmed","doi":"10.1016/j.cscee.2025.101288","DOIUrl":"10.1016/j.cscee.2025.101288","url":null,"abstract":"<div><div>The treatment of produced water remains a pressing challenge in the oil and gas sector, given its complex mixture of dispersed oil, dissolved organics, salts, and suspended solids. In this study, we examined the performance of a ceramic α-Al<sub>2</sub>O<sub>3</sub> membrane (50 nm pore size) under cross-flow operation for real produced water, across a practical range of pressures (1.3–7 bar) and temperatures (25–45 °C). Unlike many previous investigations that relied on synthetic emulsions or limited operating windows, this work uniquely combines real-field oily water testing with response surface modeling (RSM) and Sobol sensitivity analysis to disentangle the relative roles of pressure and temperature.</div><div>The membrane achieved oil-in-water (OIW) rejection between 78 % and 99.99 %, reducing concentrations to as low as 0.15 ppm. Turbidity rejection consistently exceeded 96 %, while TOC and COD reductions ranged from 30 to 60 % and 0.36–62 %, respectively. Permeate flux reached up to 150 L m<sup>−2</sup> h<sup>−1</sup>, with apparent permeability values between 150 and 210 L m<sup>−2</sup> h<sup>−1</sup>·bar<sup>−1</sup>, and recovery peaked at 91 %. Sensitivity analysis identified pressure as the dominant operating parameter, whereas temperature introduced competing effects of viscosity reduction and fouling enhancement.</div><div>These results provide evidence that ceramic membranes can offer reliable separation performance for untreated produced water, while the integration of RSM and Sobol analysis delivers a novel quantitative framework for optimizing operating conditions. The study highlights both the opportunities and trade-offs of deploying ceramic membranes at scale, offering insights directly relevant to regulatory compliance and water reuse strategies in oilfield applications.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101288"},"PeriodicalIF":0.0,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219181","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
Understanding the change of nutritional and antioxidant content in purple brown rice grown in rice–shrimp farming systems during green germination process 了解稻虾联种紫糙米青芽过程中营养和抗氧化剂含量的变化
Case Studies in Chemical and Environmental Engineering Pub Date : 2025-09-26 DOI: 10.1016/j.cscee.2025.101289
Nguyen Thi Ngoc Giang , Tran Van Khai
{"title":"Understanding the change of nutritional and antioxidant content in purple brown rice grown in rice–shrimp farming systems during green germination process","authors":"Nguyen Thi Ngoc Giang ,&nbsp;Tran Van Khai","doi":"10.1016/j.cscee.2025.101289","DOIUrl":"10.1016/j.cscee.2025.101289","url":null,"abstract":"<div><div>This research examined the way germination conditions influence the nutritional and antioxidant profiles of a new purple brown rice variety grown in rice–shrimp farming systems in the Mekong Delta, Vietnam. Response surface methodology was employed to optimize temperature (25–40 °C) and time (18–36 h) for the enhancement of key bioactive components, including γ-aminobutyric acid (GABA), free amino acids, total phenolic content (TPC), and anthocyanins. The findings indicated that germination markedly enhanced GABA levels (up to 0.015 mg/g) and free amino acid concentrations (up to 7.3 mg/g), which can be ascribed to enzymatic activation and stress-induced mechanisms. Anthocyanins, the primary antioxidants in purple rice, significantly decreased, retaining approximately 3 % of their original concentration, likely due to thermal and oxidative sensitivity during soaking and sprouting. The maximum TPC recorded was 37.09 °C for 22.25 h, although it decreased from the original value, suggesting partial degradation compensated by the enzymatic release of bound phenolics. Optimal germination was achieved at 35.2 °C for approximately 26 h, as the optimal condition for achieving a high germination rate (97.93 %), moderate anthocyanin retention (0.091 mg/g), and increased levels of GABA and amino acids. The findings highlight the trade-offs associated with germinating pigmented rice and present a scientifically validated protocol for producing germinated purple rice with enhanced functional value. This study advances the creation of high-value, health-promoting rice products derived from local varieties suited to integrated rice–shrimp ecosystems.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101289"},"PeriodicalIF":0.0,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219182","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
Impact of nano-additives and synthesis parameters on the specific heat capacity of ternary carbonate molten salt 纳米添加剂及合成参数对三元碳酸盐熔盐比热容的影响
Case Studies in Chemical and Environmental Engineering Pub Date : 2025-09-24 DOI: 10.1016/j.cscee.2025.101287
M.N.A. Siddiki, M.A. Islam, S. Saha
{"title":"Impact of nano-additives and synthesis parameters on the specific heat capacity of ternary carbonate molten salt","authors":"M.N.A. Siddiki,&nbsp;M.A. Islam,&nbsp;S. Saha","doi":"10.1016/j.cscee.2025.101287","DOIUrl":"10.1016/j.cscee.2025.101287","url":null,"abstract":"","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101287"},"PeriodicalIF":0.0,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157068","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
Efficient removal of Cd(II) and Pb(II) on NiFeAl-LDH@Polystyrene nanocomposite in single and binary systems: Optimization, kinetic and isotherm studies NiFeAl-LDH@Polystyrene纳米复合材料在单、二元体系中高效去除Cd(II)和Pb(II):优化、动力学和等温线研究
Case Studies in Chemical and Environmental Engineering Pub Date : 2025-09-19 DOI: 10.1016/j.cscee.2025.101285
Shahad A. Raheem , Ahmed A. Mohammed
{"title":"Efficient removal of Cd(II) and Pb(II) on NiFeAl-LDH@Polystyrene nanocomposite in single and binary systems: Optimization, kinetic and isotherm studies","authors":"Shahad A. Raheem ,&nbsp;Ahmed A. Mohammed","doi":"10.1016/j.cscee.2025.101285","DOIUrl":"10.1016/j.cscee.2025.101285","url":null,"abstract":"<div><div>Toxic heavy metals have undesirable consequences for the health of all living things, and their presence in the aquatic environment is a significant concern. In this study, a core-shell nanocomposite (NiFeAl-LDH@Polystyrene(PS)) was synthesized by recycling styrofoam waste with PS:LDH ratios of 2:1 and characterized using (TEM, SEM/EDS, XRD, FTIR, and BET). Then investigate its ability to adsorb Cd<sup>+2</sup> and pb<sup>+2</sup> ions in single and binary systems. Results showed a hexagonal platelet morphology of NiFeAl-LDH uniformly covered by a shell of PS nanosphers with an average pore diameter of 28.63 nm and a successful adsorption of Cd<sup>+2</sup> and pb<sup>+2</sup> ions on NiFeAl-LDH@PS. The optimization and influence of adsorption parameters (pH, dosage, agitation speed, initial concentration, and contact time) on the adsorption process were investigated using RSM analysis, yielding a good fit between experimental data and predicted responses with a correlation coefficient (R<sup>2</sup>) of 0.9956 and 0.9521 for Cd<sup>+2</sup> and pb<sup>+2</sup>, respectively. Adsorption experiments showed that the removal efficiency of Cd<sup>+2</sup> and pb<sup>+2</sup> in single-component system was 94.42 % and 99.65 %, respectively. While in the binary system, the removal efficiencies of Cd<sup>+2</sup> and pb<sup>+2</sup> were reduced, indicating that Cd<sup>+2</sup> and Pb<sup>+2</sup> adsorption was affected by the presence of other metal ion. The Langmuir isotherm model with a maximum capacity of 57.4713 and 177.305 mg/g, for Cd<sup>+2</sup> and pb<sup>+2,</sup> respectively, and the competitive Langmuir model best described the adsorption data in a single-and binary-component system. In a single-component system, it was found that the PSO models accurately described the adsorption, indicating a chemosorption process. Additionally, the modified PSO was used to describe the binary adsorption data on NiFeAl-LDH@PS. Electrostatic force interaction, oxygen-containing functional groups, and complexation reactions controlled the adsorption process. NiAlFe-LDH@PS showed significant reusability as the efficiency was 38.56 % and 42.37 % for Cd<sup>+2</sup> and Pb<sup>+2</sup>, respectively, after six regeneration cycles. In conclusion, NiAlFe-LDH@PS nanocomposite can be considered as an effective adsorbent in the removal of heavy metals from aqueous solutions.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101285"},"PeriodicalIF":0.0,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145117723","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
Investigating the essential oil production from agricultural food waste: A case study Chaiyaphum province, Thailand 调查从农业食品废弃物中生产精油:以泰国猜雅府为例
Case Studies in Chemical and Environmental Engineering Pub Date : 2025-09-19 DOI: 10.1016/j.cscee.2025.101286
Sukanya Hongthong , Wiparat Nisapai , Surachai Wongcharee , Prasubsuk Soythong
{"title":"Investigating the essential oil production from agricultural food waste: A case study Chaiyaphum province, Thailand","authors":"Sukanya Hongthong ,&nbsp;Wiparat Nisapai ,&nbsp;Surachai Wongcharee ,&nbsp;Prasubsuk Soythong","doi":"10.1016/j.cscee.2025.101286","DOIUrl":"10.1016/j.cscee.2025.101286","url":null,"abstract":"<div><div>The valorization of agricultural food waste into high value bioproducts aligns with the principles of sustainable development and circular bioeconomy. This study investigates the extraction, chemical characterization, and techno-economic feasibility of essential oil production from three selected agricultural residues: lemongrass leaves, bergamot peels, and peppermint. Utilizing steam distillation under controlled conditions (90 minutes at 100 °C, 5:1 water-to-biomass ratio), the maximum essential oil yields were 0.55 % (w/w) for both lemongrass and bergamot, and 0.48 % (w/w) for peppermint. Fourier Transform Infrared Spectroscopy was employed to identify the dominant functional groups in the oils, revealing key constituents such as aldehydes, alcohols, alkanes, and carbonyl compounds, which support their bioactivity and aromatic potential. A comparative cost analysis demonstrated that lemongrass and bergamot offer the most favorable cost-to-yield ratio, with production costs ranging from $3.00 to $6.00 per 5 kg batch, corresponding to approximately $0.11–$0.22 per milliliter of oil. Although peppermint oil exhibited a slightly lower yield and higher raw material cost, its elevated market value particularly in pharmaceutical and oral care industries may compensate for the reduced process efficiency. When benchmarked against solvent extraction and supercritical CO<sub>2</sub> techniques, steam distillation emerged as the most accessible and economically viable method for community-scale operations, offering a safer and more sustainable alternative. This study highlights the feasibility of integrating decentralized essential oil production systems into agro-waste management frameworks, particularly within rural and community enterprise contexts. The findings support the broader implementation of low-cost, resource-efficient extraction technologies for converting biomass waste into marketable natural products, thereby enhancing rural incomes and reducing environmental burdens.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101286"},"PeriodicalIF":0.0,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145094757","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
Controlling calcium carbonate scaling in desalination: A green approach using citric acid 控制海水淡化中碳酸钙结垢:柠檬酸的绿色方法
Case Studies in Chemical and Environmental Engineering Pub Date : 2025-09-16 DOI: 10.1016/j.cscee.2025.101283
Giuseppe Mazziotti di Celso , Marina Prisciandaro , Despina Karatza , Dino Musmarra , Alessandro Erto , Amedeo Lancia
{"title":"Controlling calcium carbonate scaling in desalination: A green approach using citric acid","authors":"Giuseppe Mazziotti di Celso ,&nbsp;Marina Prisciandaro ,&nbsp;Despina Karatza ,&nbsp;Dino Musmarra ,&nbsp;Alessandro Erto ,&nbsp;Amedeo Lancia","doi":"10.1016/j.cscee.2025.101283","DOIUrl":"10.1016/j.cscee.2025.101283","url":null,"abstract":"<div><div>This study focuses on the deposition of calcium carbonate, adding citric acid in solution: it shows green properties and can retard scale precipitation, reducing equipment malfunctions. Three concentrations were considered (<span><math><mrow><mn>0.520</mn><mo>×</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>3</mn></mrow></msup></mrow></math></span>, <span><math><mrow><mn>1.041</mn><mo>×</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>3</mn></mrow></msup></mrow></math></span>, <span><math><mrow><mn>1.561</mn><mo>×</mo><msup><mn>10</mn><mrow><mo>−</mo><mn>3</mn></mrow></msup><mi>m</mi><mi>o</mi><mi>l</mi><mo>/</mo><mi>l</mi></mrow></math></span>), with different temperature values (<span><math><mrow><mn>15</mn><mo>°C</mo></mrow></math></span>, <span><math><mrow><mn>35</mn><mo>°C</mo></mrow></math></span>). Results showed that citric acid is a powerful retarding agent, enhancing this behaviour at <span><math><mrow><mn>15</mn><mo>°C</mo></mrow></math></span>. Moreover, it makes nucleation more difficult because it can increase the interfacial tension between <span><math><mrow><mi>C</mi><mi>a</mi><msub><mrow><mi>C</mi><mi>O</mi></mrow><mn>3</mn></msub></mrow></math></span> crystals and the surrounding solution. Finally, citric acid favors the formation of calcite crystals with reduced sizes, whose morphological characteristics hinder their growth.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101283"},"PeriodicalIF":0.0,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145094831","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
Critical overflow of the main combined sewer in the city of Lviv: A case study of recent extreme flooding 利沃夫市主要联合下水道的严重溢出:最近极端洪水的案例研究
Case Studies in Chemical and Environmental Engineering Pub Date : 2025-09-15 DOI: 10.1016/j.cscee.2025.101284
Ivan Matlai, Ihor Popadiuk, Lesya Vovk, Volodymyr Zhuk
{"title":"Critical overflow of the main combined sewer in the city of Lviv: A case study of recent extreme flooding","authors":"Ivan Matlai,&nbsp;Ihor Popadiuk,&nbsp;Lesya Vovk,&nbsp;Volodymyr Zhuk","doi":"10.1016/j.cscee.2025.101284","DOIUrl":"10.1016/j.cscee.2025.101284","url":null,"abstract":"<div><div>The city of Lviv in Ukraine has a combined sewer system where the main sewer function is performed by the Poltva River, shaped in the underground concrete channel. In this study improved hydraulic model of Lviv sewerage system was developed, taking into account a pressure flow mode, as well as limit discharge capacities, corresponding to the urban flooding. Hydraulic modelling was conducted for the heavy rainfall event on July 5, 2022. A strong correlation was observed between the actual flood volume and the modelled overflow of the main sewer, obtained through hydraulic modelling.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101284"},"PeriodicalIF":0.0,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145094756","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
Interfacial engineering approach for enhanced degradation of methylene blue using platinum-coated polystyrene rough particles: Flow-regulated catalytic activity and kinetic modeling 使用镀铂聚苯乙烯粗颗粒增强亚甲基蓝降解的界面工程方法:流动调节催化活性和动力学建模
Case Studies in Chemical and Environmental Engineering Pub Date : 2025-09-12 DOI: 10.1016/j.cscee.2025.101279
Faizan Khan , Vishal Singh Pawak , Chandra Shekhar , Venkateshwar Rao Dugyala , Tarak Mondal , Manigandan Sabapathy
{"title":"Interfacial engineering approach for enhanced degradation of methylene blue using platinum-coated polystyrene rough particles: Flow-regulated catalytic activity and kinetic modeling","authors":"Faizan Khan ,&nbsp;Vishal Singh Pawak ,&nbsp;Chandra Shekhar ,&nbsp;Venkateshwar Rao Dugyala ,&nbsp;Tarak Mondal ,&nbsp;Manigandan Sabapathy","doi":"10.1016/j.cscee.2025.101279","DOIUrl":"10.1016/j.cscee.2025.101279","url":null,"abstract":"<div><div>This study explores an efficient decontamination strategy using platinum-coated polystyrene rough-particles as a micron-sized catalyst system for decomposing methylene blue (MB), a common organic pollutant. The synthesized nanomaterials were comprehensively characterized using Nanoparticle Tracking Analysis (NTA), Dynamic Light Scattering (DLS), Atomic Force Microscopy (AFM), Scanning Electron Microscopy (SEM), and Transmission Electron Microscopy (TEM), confirming their morphology, size distribution, and surface properties. The decontamination was performed at the air-water interface through an interface trapping method, with enhanced mixing achieved under a controlled flow environment. The experiments were conducted with a circulation speed of 50 RPM, corresponding to a Reynolds number (NR<span><math><msub><mrow></mrow><mrow><mi>e</mi></mrow></msub></math></span>) of 1686 and a high particle packing fraction of 0.8. Under these operating conditions, complete degradation of MB was achieved within 30 min, significantly faster than the 75 min required for degradation in the bulk phase. The reaction kinetics were analyzed and found to follow the Langmuir–Hinshelwood model, with an estimated rate constant of 0.018 min<sup>−1</sup>, indicating efficient surface-mediated catalytic activity. Furthermore, an Artificial Neural Network (ANN) model was developed to validate and predict the degradation kinetics, showing a Root Mean Square Error (RMSE) of 5.5 and a high correlation coefficient (R<sup>2</sup>) of 0.9656, confirming the reliability of the predictive model. This interface-assisted, catalyst-based degradation approach demonstrates a promising, reusable, cost-effective, and environmentally friendly solution for advanced wastewater treatment applications.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101279"},"PeriodicalIF":0.0,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145094761","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
Microwave-assisted synthesis of hybrid materials "Posidonia oceanica-copper nanoparticles" for wastewater purification 微波辅助合成用于废水净化的杂化材料“海芋藻-纳米铜”
Case Studies in Chemical and Environmental Engineering Pub Date : 2025-09-12 DOI: 10.1016/j.cscee.2025.101280
Rania Hrichi , Muhammad Umar Azam , Alen Nils Baeza Fonte , Ridha Touati , Manuel Valiente , Aida Kesraoui , Khalid Askar
{"title":"Microwave-assisted synthesis of hybrid materials \"Posidonia oceanica-copper nanoparticles\" for wastewater purification","authors":"Rania Hrichi ,&nbsp;Muhammad Umar Azam ,&nbsp;Alen Nils Baeza Fonte ,&nbsp;Ridha Touati ,&nbsp;Manuel Valiente ,&nbsp;Aida Kesraoui ,&nbsp;Khalid Askar","doi":"10.1016/j.cscee.2025.101280","DOIUrl":"10.1016/j.cscee.2025.101280","url":null,"abstract":"<div><div>Synthetic dyes released by the textile and related industries are a major source of water pollution due to their persistence, toxicity, and resistance to conventional treatment methods The development of sustainable and efficient biosorbents therefore represents a key challenge in wastewater treatment. In this study, dried <em>Posidonia Oceanica</em> (P.O) biomass was used for the first time in the microwave-assisted synthesis of hybrid materials functionalized with copper (1 %, 2 %, and 4 % Cu<sup>2+</sup>), offering a rapid, energy-efficient, and solvent-free alternative to conventional methods. This technique enhances chemical yield and reaction control while minimizing environmental impact. The raw and modified P.O fibers were characterized using zero point of charge (pH<sub>pzc</sub>) and Boehm titration to determine surface acidity/basicity. Further structural and morphological analyses were conducted using infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS), confirming the formation of Cu–OH, Cu–O–C, and Cu(COOH)<sub>2</sub> bonds and an increase in basic surface sites. The materials' adsorption performance was assessed by removing methyl orange (MO) from aqueous solutions. Biosorption capacity increased from 0.768 mg g<sup>−1</sup> for raw P.O to 0.981 mg g<sup>−1</sup> for P.O-4 % Cu<sup>2+</sup>. Important factors influencing adsorption were examined. Prewashing with 0.01 M EDTA reduced NaCl interference, thereby enhancing MO removal. Increasing the adsorbent mass improved dye uptake; while higher temperature slightly improved adsorption, indicating a slightly endothermic process. Kinetic modeling using pseudo-first-order, pseudo-second-order, and Brouers–Sotolongo (n = 2) models indicated that the Brouers–Sotolongo model best described the process, with improved retention rates and homogeneity (α = 1; ζc = 2.51 min). Recyclability tests demonstrated that P.O-4 % Cu<sup>2+</sup> retained 92 % of its adsorption capacity after three cycles when regenerated with HCl + NaCl, highlighting its potential for reuse. These results demonstrate that microwave-assisted Cu<sup>2+</sup> modification significantly enhances the biosorption properties of P.O fibers, making them promising, sustainable biosorbents for dye removal in wastewater treatment applications.</div></div>","PeriodicalId":34388,"journal":{"name":"Case Studies in Chemical and Environmental Engineering","volume":"12 ","pages":"Article 101280"},"PeriodicalIF":0.0,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145094758","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
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