Cleaner Chemical Engineering最新文献

{"title":"Strategic routes in valorising pre-processed coal fly ash to promote circular economy","authors":"Brinthan Kanesalingam ,&nbsp;W. Ashane M. Fernando ,&nbsp;Chulantha Jayawardena ,&nbsp;Dinesh Attygalle ,&nbsp;D.A.S. Amarasinghe ,&nbsp;Sandeep Panda","doi":"10.1016/j.clce.2025.100200","DOIUrl":"10.1016/j.clce.2025.100200","url":null,"abstract":"<div><div>Coal is a well-known for power generation, particularly in developing countries, due to its favourable economic benefits. Its combustion generates large quantities of waste by-products including coal fly ash (CFA), bottom ash, and noxious gases. These waste components challenge global movements towards sustainability and exploring ways to manage these by-products is of marked importance. Single-component separation of CFA is often reported in the literature, leaving out means for comprehensive utility (i.e., multi-component extraction), which challenges the circular economy aspects of CFA utilisation. To this end, we identify the requirement for multi-stage processing of CFA and herein, a thorough account of the opportunities associated with pre-processing of CFA is presented. As a result, we recognise washing cycles as a primary pre-processing strategy that paves the way for various downstream value-added products, namely cenospheres, fertiliser precursors, critical elements and zeolite precursors. Furthermore, to validate our premise, we propose a process flow to recover these valuable components through a preliminary experimental approach. These experiments concentrated on synthesising zeolites for wastewater treatment and the remaining solid (top and bottom) and liquid phases showed promise for extracting valuable components. Notably, the solution was enriched in fertiliser ions and the floating solid fraction was populated with cenospheres. While observing potential pathways for critical elements recovery and recycling the spent zeolites, our approach conforms to the sustainability and circular economy of CFA with cleaner chemical engineering process strategies with further studies being recommended to appraise its scalability and efficiency improvements.</div></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"11 ","pages":"Article 100200"},"PeriodicalIF":0.0,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144861217","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":"Removal of iron, manganese, and arsenic from groundwater by using banana and pineapple peel charcoal: evidence from sophisticated techniques","authors":"Molla Rahman Shaibur ,&nbsp;Abu Sayed Al Helal ,&nbsp;Sabiha Sarwar ,&nbsp;Md. Ashik Miah ,&nbsp;Abu Bakar Siddique ,&nbsp;Masum Howlader ,&nbsp;Sharif Shahara Nova ,&nbsp;Kulsuma Akter Priyanka","doi":"10.1016/j.clce.2025.100202","DOIUrl":"10.1016/j.clce.2025.100202","url":null,"abstract":"<div><div>This study presents a novel and sustainable approach for removing iron (Fe), manganese (Mn), and arsenic (As) from groundwater using biochar adsorbents derived from banana (<em>Musa ornata</em>) peel (BP) and pineapple (<em>Ananas comosus</em>) peel (PP). Unlike conventional chemical or synthetic adsorbents, these agro-waste-derived materials provide a cost-effective and environmentally friendly alternative. The structural characterization of the developed biochars revealed porous surfaces with irregular cavities and well-developed microstructures as observed through Scanning Electron Microscopy (SEM), while Fourier Transform Infrared Spectroscopy (FTIR) confirmed the presence of key functional groups (–OH, –COOH, and C=C) involved in metal binding. Groundwater analysis from Jaghati village, Jashore, Bangladesh, revealed elevated concentrations of Fe (4.14 mg L ¹), Mn (2.26 mg L⁻¹), and As (0.014 mg L⁻¹). Adsorption experiments demonstrated that BP charcoal achieved 96.31 % at 180 minutes with a 350 mg L^-1 dose in pH 7.0, while PP charcoal achieved a maximum Fe removal efficiency of 98.97 % at 60 minutes with a 350 mg L^-1 dose in pH 7.0. For Mn, BP charcoal showed a maximum removal of 83.12 % at pH 7.0 with a 250 mg L⁻¹ dose after 180 minutes. However, both adsorbents showed limited capacity for As removal, with maximum efficiencies of 11.67 % (BP charcoal) and 12.94 % (PP charcoal). The study highlights the promising potential of BP and PP charcoals for effectively removing Fe and Mn from groundwater, contributing to the development of low-cost, biodegradable treatment options for rural and resource-limited settings.</div></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"11 ","pages":"Article 100202"},"PeriodicalIF":0.0,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144912066","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":"Batch process design and simulation for the regeneration of MEG, DEG and TEG from a complex refinery waste effluent using E-NRTL method in Aspen Hysys","authors":"Jigyasha Srivastava,&nbsp;Prakash Kumar Beri Gopinathan","doi":"10.1016/j.clce.2025.100199","DOIUrl":"10.1016/j.clce.2025.100199","url":null,"abstract":"<div><div>The petroleum industry primarily relies on glycols as hydrate inhibitors. In the petrochemical sectors, one of the key processes is the dehydration of natural gas. Mono-ethylene glycol and tri-ethylene glycol (MEG and TEG) are the most commonly used glycols for dehydration to prevent the corrosion and blockage caused by hydrate development in pipelines. Following this dehydration procedure, a waste glycol combination including organic contaminants such as aromatic hydrocarbons is produced. A novel approach is followed in this research is to develop the modeling and simulation techniques for the regeneration of individual glycol components from the petrochemical waste glycol. The E-NRTL (Electrolyte Non-Random Two-Liquid) property package is used to simulate the process using the simulation tool Aspen Hysys V12.0. The operating parameters, particularly temperature and pressure from the simulation are then validated with an experimental investigation. The outcome from the experiment shows excellent results, with MEG and TEG achieving 99.2% and 99.5% purity respectively, while diethylene glycol (DEG) was not detected in gas chromatography mass spectrometer (GC–-MS). The overall yield of the process was calculated as 99.46%. The sensitivity analysis was conducted to optimize the process to achieve optimum conditions to prevent the system from high pressure drop at 100% column efficiency. This represents a significant advancement towards recycling the waste material into valuable products that can be reused in the process, aligning with Sustainable Development Goal (SDG) 12: Responsible Consumption and Production, and support in achieving the industry targets.</div></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"11 ","pages":"Article 100199"},"PeriodicalIF":0.0,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144841426","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":"Erratum Regarding Previously Published Articles","authors":"","doi":"10.1016/j.clce.2025.100196","DOIUrl":"10.1016/j.clce.2025.100196","url":null,"abstract":"","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"11 ","pages":"Article 100196"},"PeriodicalIF":0.0,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145019158","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":"Wetting the surface: A deep dive into chemistry and applications of surfactants","authors":"Aisha ,&nbsp;Iqra Batool ,&nbsp;Shafia Iftekhar ,&nbsp;Muhammad Babar Taj ,&nbsp;Sónia Alexandra Correia Carabineiro ,&nbsp;Fawad Ahmad ,&nbsp;Muhammad Imran Khan ,&nbsp;Abdallah Shanableh ,&nbsp;Heba Alshater","doi":"10.1016/j.clce.2025.100197","DOIUrl":"10.1016/j.clce.2025.100197","url":null,"abstract":"<div><div>This review article initiates a series of three, focusing on the chemistry and practical applications of surfactants. These compounds play essential roles in wetting, cleaning, emulsifying, dispersing, and exhibiting anti-foaming and foaming properties across various sectors, including agricultural chemicals, cosmetics, microemulsions, polymer latex systems, biocides, pharmaceuticals, and food products. Through a comprehensive examination of eighteen volumes from the seminal surfactant improvement and development series, the ICI Surface Actives and Detergents, coupled with extensive patent searches, the remarkable diversity in the chemical structures of commercially available surfactants is unveiled. The series focuses on surfactants used in various commercial products, including fabric softeners, detergents, fuel additives, paints, and more. It systematically explores the key characteristics and physical behaviors of surfactants, with particular emphasis on their influence on surface and interfacial phenomena. The review also delves into the natural self-assembly process through which surfactant molecules form micelles.</div></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"11 ","pages":"Article 100197"},"PeriodicalIF":0.0,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144828634","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":"Valorization of tannery-derived FAMEs into bio-based epoxides via chemo-enzymatic synthesis","authors":"Víctor Deroncelé ,&nbsp;Ismael Tahmaz ,&nbsp;Sílvia Sorolla ,&nbsp;Anna Bacardit","doi":"10.1016/j.clce.2025.100195","DOIUrl":"10.1016/j.clce.2025.100195","url":null,"abstract":"<div><div>The urgent transition toward low-carbon chemical manufacturing has prompted the development of renewable alternatives to fossil-based epoxy intermediates. This study presents an integrated and resource-efficient chemo-enzymatic route for the synthesis of epoxidized methyl oleate (EMO) from fatty acid methyl esters (FAMEs) derived from tannery waste—a lipid-rich but underutilized industrial residue. A single-step urea complexation achieved 86.7 ± 0.6 % methyl oleate purity with a 38.1 ± 0.9 % recovery yield, while the saturated-rich co-product (∼40 %) exhibited physicochemical properties suitable for biodiesel or lubricant applications.</div><div>Subsequent epoxidation was carried out using immobilized <em>Candida antarctica</em> lipase B (Novozym® 435) and in situ generated performic acid, yielding an oxirane oxygen content of 6.42 ± 0.14 %, corresponding to &gt;90 % conversion of double bonds under mild conditions. The enzyme retained 72 % of its initial activity after ten reuse cycles, significantly enhancing process circularity and reducing catalytic costs.</div><div>Green chemistry metrics were favorable: atom economy reached 86 %, solvent recovery exceeded 85 %, and the E-factor remained as low as 0.86 kg waste/kg EMO. A cradle-to-gate life cycle assessment (LCA) estimated a global warming potential (GWP) of 1.92 kg CO₂-eq/kg EMO—representing a 63 % reduction compared to petrochemical benchmarks. Economic analysis at the 1000 t/year scale yielded a production cost of €1.57/kg with an internal rate of return (IRR) of 15 %.</div><div>Overall, this work demonstrates how lipid-rich industrial residues can be converted into high-value bio-based epoxides through a scalable and environmentally sound chemo-enzymatic route, aligning with circular economy principles and green chemistry targets.</div></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"11 ","pages":"Article 100195"},"PeriodicalIF":0.0,"publicationDate":"2025-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144723823","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":"Bioremediation of heavy metals in aquatic environment: A review","authors":"Olubukola Oziegbe ,&nbsp;Ehitua  Julius Oziegbe ,&nbsp;Olusola Ojo-Omoniyi","doi":"10.1016/j.clce.2025.100193","DOIUrl":"10.1016/j.clce.2025.100193","url":null,"abstract":"<div><div>The pursuit of critical minerals such as lithium (Li), nickel (Ni), cobalt (Co), and rare earth elements (REE) has intensified mining, producing heavy metal waste that contaminates water bodies. Pollution from human activities and improper disposal of high-tech products containing heavy metals like Hg, Cd, Ni, Cu, Pb, and Cr has degraded surface and groundwater. These metals enter the human body via bioaccumulation in the food chain or direct consumption of contaminated water, posing health risks. There is an urgent need for cost-effective, eco-friendly methods to decontaminate water without generating additional pollutants. Conventional remediation technologies are costly and produce hazardous waste requiring disposal. In contrast, biological materials—such as bacteria, cyanobacteria, fungi, lichens, algae, and plants—offer affordable, sustainable solutions for water decontamination. Moreover, metal-rich biomass from bioremediation processes, like cyanoremediation, can be converted into valuable products, such as metal nanoparticles for pharmaceutical and industrial use, creating a closed-loop system that generates wealth instead of waste. Genetic engineering can further enhance biosorbent organisms and plants to improve heavy metal binding and accumulation. This review examines the environmental and health impacts of heavy metals, the limitations of conventional remediation methods, various bioremediation techniques, and future research directions.</div></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"11 ","pages":"Article 100193"},"PeriodicalIF":0.0,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144749648","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":"Biodegradable waste-derived cellulose/nylon-6-coated iron-oxide nanocomposite encapsulated with chitosan for enhanced wastewater treatment","authors":"Evans Suter ,&nbsp;H.L Rutto ,&nbsp;I.G Mkhize","doi":"10.1016/j.clce.2025.100190","DOIUrl":"10.1016/j.clce.2025.100190","url":null,"abstract":"<div><div>The growing threats of water scarcity, climate change, and waste accumulation necessitate innovative solutions, including the transformation of solid waste into sustainable new materials through recycling technologies. This study prepared a low-cost, superior and biodegradable polymeric material made of cellulose nanocrystals from waste paper and pulp sludge, nylon-6 waste, magnetic iron oxide nanoparticles, and chitosan. The nanocomposite membrane presented saturation magnetization of 26.90 emu/g, significantly lower than magnetic saturation (Ms) of magnetic iron oxide nanoparticles (Fe₃O₄). This resulted from the addition of cellulose nanocrystals (CNCs), nylon 6 (N6), and Chitosan (CT), as confirmed by Fourier Transform Infrared (FTIR). Scanning electron microscopy (SEM) revealed that the ultra-permeable membrane had highly porous surfaces. Brunauer Emmet Teller (BET) demonstrated that the addition of chitosan and Fe₃O₄ boosted nitrogen adsorption. The isoelectric point (IEP) pH at zero point charge (pHPZC) of magnetized cellulose nanocrystals/nylon 6 nanocomposite membrane encapsulated with chitosan (CNCs/N6@Fe₃O_4<img>CT) was 7.9 due to the hydroxyl groups on the amphoteric surface that react with bases or acids to create a pHPZC that is extremely near to neutral. The nanocomposite presented a larger swelling ratio of 168.24 g/g than precursor materials. The membrane demonstrated excellent rejection efficiency, initiating at approximately 98 %. The resulting nanocomposite membrane's remarkable water permeability, porosity, good rejection, and flux, even at low pressure, offers a potential for water treatment and air filtration applications.</div></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"11 ","pages":"Article 100190"},"PeriodicalIF":0.0,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144655412","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":"Synthesis and application of copper-based cholesteryl chloroformate gelator for oil spill remediation","authors":"Raymond T. Iorhemen,&nbsp;Abdulmumin A. Nuhu,&nbsp;Israel K. Omoniyi,&nbsp;Abubakar B. Aliyu","doi":"10.1016/j.clce.2025.100192","DOIUrl":"10.1016/j.clce.2025.100192","url":null,"abstract":"<div><div>Oil spill impact negatively on the environment. Its remediation has been very challenging, and researchers have developed high efficient methods in handling this anomaly, but end up introducing secondary pollutants to the environment. The aim of this study is to synthesise a copper-based organometallogelator with cholesteryl chloroformate and apply it for oil spill remediation in water. In the methodology, the aromatic linker coded CuAL (copper aromatic linker) was first synthesised from a reaction of copper complex (coper reacting with hydrazine) with isophthaloyl chloride, then cholesteryl chloroformate was added to produce a gelator coded CuGe (copper gelator) with the A(LS)₂ (aromatic, linker and steroid) network, which were subsequently characterised. MS results for CuAL and CuGe showed fragments corresponding to the proposed structures, and were both highly crystalline, especially CuGe. Aliphatic primary amines, aromatic rings, aromatic overtones, and conjugated ketones were present in both CuAL and CuGe, with slight variation in peak positions, and the average particle diameter were 5.9 μm (CuAL), and 47.0 μm (CuGe), respectively. The synthesised compounds were thermally stable up to 338 °C (60.1 %) for CuAL and 469.9 °C (74.1 %) for CuGe. Heating-cooling gelation test was positive for methanol, petroleum motor spirit (PMS), kerosene (KSE), and crude oil (COL), with the longest time being 9 min. The highest gelation time and temperature (Tgel) at 2 mg were 3 min (for PMS), and 60 °C for COL respectively. Sorption capacities were 3.0 ± 0.3, 2.0 ± 0.1, and 3.7 ± 0.3 3.0, for PMS, KSE, and COL respectively. The removal efficiency CuGe was 95 % for COL, 89 % for PMS, and 80 % for KSE and is recyclable. In conclusion, a thermally stable, crystalline, eco-friendly, and recyclable copper-cholesteryl chloroformate-based metallogelator has been successfully synthesised. The gelator, CuGe, was successfully applied in the gelation of KSE, PMS, and COL from water with good efficiencies.</div></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"11 ","pages":"Article 100192"},"PeriodicalIF":0.0,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680038","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":"In-line product separation in a continuous oscillatory flow bioreactor as process intensification and product inhibition mitigation strategy","authors":"Judith Buchmaier ,&nbsp;Theresa Plesch ,&nbsp;Philipp Petermeier ,&nbsp;Michael Egermeier ,&nbsp;Bettina Muster-Slawitsch","doi":"10.1016/j.clce.2025.100191","DOIUrl":"10.1016/j.clce.2025.100191","url":null,"abstract":"<div><div>A Continuous Oscillatory Flow Bioreactor (COFB) was developed to enable the processing of lignocellulosic biomass at high solid loadings of up to 23 % and to allow for in-line product separation. The enzymatic saccharification conducted in the COFB yielded glucose concentrations of up to 50 g/L at a residence time of 3 h, corresponding to a yield of 0.2 g_glucose/g_substrate and an enzymatic productivity of 10 g_glucose/g_enzyme. The system incorporated precise quantification of the minimal energy input for oscillatory mixing, resulting in a specific energy demand of 6 Wh/kg_glucose. Notably, the integration of in-line product separation enhanced enzymatic productivity by up to 40 %. Compared to conventional shaking flask experiments, process intensification in the COFB led to a 1.7-fold increase in volumetric productivity and a 1.6-fold reduction in residence time. These findings underscore the potential of the COFB as a scalable and energy-efficient platform for biorefinery applications.</div></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"11 ","pages":"Article 100191"},"PeriodicalIF":0.0,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144631698","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}