Sustainable Chemistry for the Environment最新文献

{"title":"Effect of thermal treatment, foaming and stabilizing agents on the synthesis of fly ash-based geopolymer foams using Raman spectroscopy and 29Si and 27Al MAS NMR","authors":"Ghizlane Moutaoukil ,&nbsp;Isabel Sobrados ,&nbsp;H.Süleyman Gökçe ,&nbsp;Saliha Alehyen","doi":"10.1016/j.scenv.2025.100257","DOIUrl":"10.1016/j.scenv.2025.100257","url":null,"abstract":"<div><div>Increasing environmental concerns have challenged researchers to find greener materials to meet the sustainability goals of applied engineering industries. Geopolymers, which have desirable chemical, mechanical, and porous properties, are promising for a variety of applications, from wastewater treatment to the production of green or lightweight construction materials. This study aims to investigate the effect of thermal treatment (70°, 70°+300° and 70°+600°C), foaming (0.1, 0.5 and 0.7 % Al powder) and stabilizing agent (0.1, 0.3 and 0.5 % sodium dodecyl sulfate [SDS]) on the mechanical and microstructural properties of fly ash-based geopolymer foams (GF). Uniaxial compressive strength values of these foams were determined on prepared 35(Ø)× 70 mm cylindrical specimens. Fly ash and final products were characterized by X-ray fluorescence spectrometers (XRF), X-ray diffraction (XRD), Magic-Angle Spinning Nuclear Magnetic Resonance Spectroscopy (²⁹Si and ²⁷Al MAS NMR), scanning electron microscopy (SEM), specific surface area/porosity analysis and Raman spectroscopy. The results shows that increasing the content of foaming and stabilizing agents increases the porosity of the geopolymeric foams. However, this also leads to a decrease in the strength of the specimens. Additionally, exposing the geopolymer foam specimens to high temperatures caused the porosity to decrease from 71 % to 62 %. Raman spectra analysis revealed a shift towards lower wavenumber of the bands attributed to Si-O-Si, Si-O-Al or O-Si-O; this is indicative of a change in the structure of the geopolymeric network from Q4 to Q3. In addition, the ²⁷Al NMR spectra analysis confirmed the crystallization of a part of the gel at high temperatures.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"10 ","pages":"Article 100257"},"PeriodicalIF":0.0,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144089598","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":"Musa paradisiaca peel and sludge co-pyrolysis: Thermal behavior and kinetic analysis","authors":"J. Athitha Kandan,&nbsp;K. Chithra","doi":"10.1016/j.scenv.2025.100258","DOIUrl":"10.1016/j.scenv.2025.100258","url":null,"abstract":"<div><div>The thermal degradation behavior, synergistic interactions and reaction kinetics of the sewage sludge (SS) and <em>Musa paradisiaca</em> peel (MP) co-pyrolysis was studied. The blend with SS and MP in the mass ratio 1:3 (SS01MP03) showed the highest deviation from the calculated values with an increment as high as 19 % in the mass loss under thermogravimetric analysis (TGA) and hence it was considered the blend with the highest synergy. The estimation of activation energies (E_act) of the blends revealed that the synergistic interactions between SS and MP led to a 25.59 % reduction in the E_act of the pyrolysis reaction of SS01MP03 which increases pyrolysis efficiency. The TGA of SS01MP03 at various heating rates (10–40 ˚C/min) revealed a complex three step degradation mechanism with high mass loss in the 2nd stage. The kinetics of the pyrolysis of the most synergistic blend (SS01MP03) was performed using the Coats-Redfern model-fitting (CRM) method and the activation energies (E_act) were estimated by model-free (MF) methods like Flynn–Wall-Ozawa method (FWOM), Kissinger–Akahira–Sunose method (KASM), and Starink methods. The Zhuravlev equation in the CRM method proved to be the best fit (E_act = 68.46 kJ/mol), which was close to the values 65.389, 65.711 and 71.055 kJ/mol predicted by MF methods KASM, Starink and FWOM respectively. This suggests that the results are reliable.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"10 ","pages":"Article 100258"},"PeriodicalIF":0.0,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143943653","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":"Insilico mining of metagenomic datasets for novel PET hydrolase homologs: Enhancing enzyme discovery for circular bioeconomy","authors":"Shubham Kumar ,&nbsp;Riya Bhardwaj ,&nbsp;Km Shivangi ,&nbsp;Sameena Mehtab ,&nbsp;Barkha Singhal","doi":"10.1016/j.scenv.2025.100253","DOIUrl":"10.1016/j.scenv.2025.100253","url":null,"abstract":"<div><div>Polyethylene terephthalate (PET) pollution presents a significant environmental challenge, necessitating innovative strategies for its degradation and recycling. This study investigates PET-degrading enzymes using a Hidden Markov Model (HMM) to analyse 92 amino acid sequences from the PAZy database. The research aims to uncover key structural features and sequence conservation across enzymes from diverse environmental biomes, thus advancing the understanding of PET hydrolysis mechanisms. Structural motifs such as the nucleophilic elbow (GXNXG), catalytic triad, oxyanion hole, and aromatic clamp were identified as critical for PET degradation. Sequence conservation was observed in enzymes from marine, sediment, composting, and wastewater environments, highlighting the widespread distribution of PET-degrading activity. Physicochemical analyses revealed variations in enzyme stability, with most enzymes exhibiting low thermostability. 3D structural modeling and molecular docking identified PETase2 and PETase4 enzymes as having high binding affinities for PET. These findings enhance the molecular understanding of PET degradation and provide insights for developing biotechnological solutions to manage plastic waste. The study underscores the potential of enzymatic processes for sustainable plastic recycling and bioremediation, contributing to the broader goal of advancing the circular bioeconomy.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"10 ","pages":"Article 100253"},"PeriodicalIF":0.0,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143905948","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 impact of carbon felt thickness and de-bundled felt fibers on dye adsorption: The external surface matters","authors":"Batuhan Mulla ,&nbsp;Kyriacos Ioannou ,&nbsp;Ioannis Ioannidis ,&nbsp;Ioannis Pashalidis ,&nbsp;Nikolaos Kostoglou ,&nbsp;Claus Rebholz","doi":"10.1016/j.scenv.2025.100254","DOIUrl":"10.1016/j.scenv.2025.100254","url":null,"abstract":"<div><div>Adsorption onto carbon-based materials has emerged as a prominent method for removing contaminants from aqueous solutions, gaining notable attention recently. In this study, two activated carbon (AC) felt materials, with very similar Brunauer-Emmet-Teller (BET) surface areas (∼1850 m²/g) but different thickness (2 mm and 3 mm), were oxidized using concentrated nitric acid to modify their surface properties and thus further improve their adsorption capacity towards crystal violet (CV) dye. The oxidation process caused a notable decline in BET surface area (∼550 m²/g) and pore volume, coupled with a modest rise in average pore size. Batch adsorption tests were conducted to assess the CV adsorption efficiency of oxidized AC felt materials, both in their original form and as de-bundled fibers. Evaluation of the adsorption performance in groundwater and seawater solutions was also carried out. Thermodynamic analysis revealed that the adsorption process is spontaneous, endothermic, and primarily driven by entropy. Results from kinetic experiments revealed that the thinner felt shows better performance compared to the thicker counterpart, removing ∼70 % and ∼20 % of the CV dye after 10 min, respectively. However, the de-bundled fibers from the thinner and thicker felt materials display much higher uptakes, specifically ∼95 % and ∼45 % after 10 min, respectively, confirming that the external available surface area matters most in kinetic studies.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"10 ","pages":"Article 100254"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143924102","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":"Assessment of inhibition performance of expired chloroquine phosphate on 304 L stainless steel corrosion in hydrochloric acid solution: An experimental and computational study","authors":"Muhammad Abubakar Lawal ,&nbsp;Abdulrahman Musa ,&nbsp;Zahradeen Muhammad ,&nbsp;Kabiru Haruna ,&nbsp;Tawfik A. Saleh","doi":"10.1016/j.scenv.2025.100251","DOIUrl":"10.1016/j.scenv.2025.100251","url":null,"abstract":"<div><div>This study comprehensively investigates the corrosion inhibition properties of expired chloroquine phosphate (CLQ) in 1 M hydrochloric acid (HCl), simulating industrial acid cleaning processes, through a combination of weight loss, electrochemical, surface analysis techniques, and DFT calculations. The findings reveal that CLQ exhibits a concentration-dependent inhibition efficiency, reaching over 91 % at 1 g/L and 25°C. Notably, the inhibition performance slightly increases with temperature, attributed to enhanced molecular mobility and diffusion of CLQ, which facilitate improved surface coverage and the filling of surface imperfections, thereby strengthening the protective barrier on the steel. PDP analysis implies that CLQ behaves as a mixed-type inhibitor. Surface analyses, including SEM, EDS, 3D profilometry, and FTIR, conducted after a 24-h immersion period substantiate the development of a protective layer on the steel surface. Computational studies highlight that the aromatic heterocyclic and aliphatic amine regions of CLQ are pivotal in facilitating electron transfer during adsorption, as evidenced by analyses of the HOMO, LUMO, &amp; molecular electrostatic potential (MEP). These analyses support a mixed physisorption and chemisorption mechanism, with the aromatic moiety identified as the primary adsorption site. The coherence between experimental and computational results underscores CLQ's effectiveness as a corrosion inhibitor. Moreover, the utilization of expired chloroquine not only offers a cost-effective solution but also promotes environmental sustainability by repurposing pharmaceutical waste, thereby reducing pollution.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"10 ","pages":"Article 100251"},"PeriodicalIF":0.0,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143855306","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":"Highlighting phytoconstituents of Trigonella foenum-graecum (fenugreek) seeds as multi-targeted inhibitors of common cancer receptors and subsequently optimizing its sequential extraction to develop an oral nutraceutical","authors":"Tathagata Adhikary,&nbsp;Garima Tripathi,&nbsp;Avik Majumdar,&nbsp;Piyali Basak","doi":"10.1016/j.scenv.2025.100252","DOIUrl":"10.1016/j.scenv.2025.100252","url":null,"abstract":"<div><div>Traditional knowledge on the medicinal properties of <em>Trigonella foenum-graecum</em> (fenugreek) is being revisited in recent studies to provide supporting scientific data and explore its diverse bioactivities. Gathering data from different phytochemical-related databases and chromatographic studies, we have summarized 112 compounds to be present in the fenugreek seeds<em>.</em> Based on the prediction of chemical absorption, distribution, metabolism, excretion, and toxicity (ADMET properties), 72 phytochemicals are considered as probable therapeutic agents, and molecular docking with 10 cancer targets is performed to highlight the ligands that can exhibit multitarget activity. The docking results indicate a majority of the saponins and few flavonoids as the hit molecules. Subsequently, ultrasound-assisted solvent extraction of the seeds is done using different solvents (relative polarity varying from 0.726 to 0.009) with the objective of maximizing the saponin and flavonoid content in the crude extract. Estimating the antioxidant potential, total phenol, flavonoid, and saponin content of each extract, methanol is reported to be the desired extracting solvent with the highest values in yield percentage of bioactive contents. The results presented in this work necessitate further <em>in vitro</em> and <em>in vivo</em> evaluations to perform hit-to-lead optimization and take a step forward toward discovering multitargeted cancer-preventive drugs with minimal side effects. Subsequently, fenugreek seed mucilage is sequentially extracted from the residue/marc left after methanolic extraction. The formulated tablets, prepared using the wet granulation method, contain 36 % fenugreek seed extract and 44 % mucilage content. The study highlights the use of fenugreek seed mucilage as an excipient to develop tablets with an acceptable range (of the Indian Pharmacopoeia (IP) limits) of hardness, friability, weight uniformity, and drug-excipient compatibility.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"10 ","pages":"Article 100252"},"PeriodicalIF":0.0,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143863779","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":"Thiamine hydrochloride aided mechanochemical reaction: An efficient synthesis of Aryl-1,2,3-triazoles in copper ball milling conditions","authors":"Pankaj V. Ledade ,&nbsp;Jitendra K. Gunjate ,&nbsp;Twinkle S. Wankhede ,&nbsp;Sami H. Mahmood ,&nbsp;Trimurti L. Lambat","doi":"10.1016/j.scenv.2025.100250","DOIUrl":"10.1016/j.scenv.2025.100250","url":null,"abstract":"<div><div>The current study investigates the catalytic efficacy of the natural organo-catalyst Vitamin B₁ (Thiamine Hydrochloride i.e. VB₁) in the synthesis of Aryl-NH-1,2,3-Triazoles utilizing Cu ball milling conditions. The reaction involving β-nitrostyrenes, trimethylsilylazide (TMSN₃), and potassium carbonate, facilitated by the VB₁ catalyst in Cu ball milling condition, has been successfully reported for the first time to yield the corresponding 4-Aryl-NH-1,2,3-Triazoles through a green chemistry approach. The methodology outlined in this study follows the concepts of green chemistry in its technique, incorporating elements such as a biodegradable catalyst, optimized ball milling conditions, reduced reaction times, high product yields, and the recyclability of both the catalyst and copper balls, all while eliminating the need for additional metal catalysts and ensuring high atom economy.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"10 ","pages":"Article 100250"},"PeriodicalIF":0.0,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869274","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":"Advancing biomass valorization with zeolite catalysts: Focus on oxidative transformations","authors":"Foteini Zormpa ,&nbsp;Philipp Treu ,&nbsp;Erisa Saraçi","doi":"10.1016/j.scenv.2025.100249","DOIUrl":"10.1016/j.scenv.2025.100249","url":null,"abstract":"<div><div>The catalytic upgrading of biomass into high-value platform chemicals offers a promising alternative to conventional fossil-based processes, driven by the need for safer, environmentally friendly, and energy-efficient technologies. Zeolites, with their unique structural properties, high surface area, and tunable active sites, are widely used in biomass conversion processes. Metal-modified zeolites, engineered with specific functionalities, exhibit exceptional catalytic activity in key reactions such as glucose isomerization, HMF hydrogenation, fatty acid esterification, and hydrodeoxygenation of phenolics and vegetable oils. This review focuses on the role of zeolites in oxidative biomass transformations, emphasizing their effectiveness in a range of reactions, including functional group oxidation, C<img>C epoxidation, and C-C bond cleavage. We examine the critical features of zeolites -such as porosity, acidity, and metal incorporation- that influence their catalytic performance, especially in terms of selectivity and diffusion limitations. Special attention is given to the oxidative conversion of bio-derived molecules like glucose, HMF and fatty acids into bio-derived acids and epoxides through sustainable, \"green\" routes. The review concludes by addressing current challenges and exploring future directions for optimizing zeolite-based catalysts for biomass oxidative transformations and the broader bio-based chemical industry.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"10 ","pages":"Article 100249"},"PeriodicalIF":0.0,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833554","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":"Effect of Fe and Ni loading in Fe-Ni supported on activated carbon catalyst on glycerol acetylation to acetins","authors":"Mohammad Fauzi Ahmad Termezi ,&nbsp;Syaza Izyanni Ahmad ,&nbsp;Mohd Hizami Mohd Yusoff","doi":"10.1016/j.scenv.2025.100248","DOIUrl":"10.1016/j.scenv.2025.100248","url":null,"abstract":"<div><div>Sustainable valorisation of glycerol into high-value products has gained significant attention as a promising alternative, offering a greener and more economically sustainable pathway to produce chemicals, fuels, and biopolymers. Acetylation of glycerol is one of the promising routes for producing valuable acetins, which are widely used as biofuels, plasticizers and solvents. In this study, Fe-Ni/AC catalysts were synthesized with different metal loading via wet impregnation method and characterized using FT-IR, SEM-EDX, TGA, BET and NH₃-TPD. The catalysts were subjected to an acetylation reaction under a microwave assisted condition at 90 ℃ for 60 min and the performance was demonstrated based on glycerol conversion and the production of acetins, specifically monoacetin (MA) and the combined yield of diacetin and triacetin (DA+TA). From the characterization results, the impregnated iron-nickel significantly impacts the physicochemical properties of the studied bimetallic catalyst. Increasing the metal loading reduced the catalyst’s surface area but enhanced the concentration of acid sites which as a result improved the glycerol conversion to MA and the combined yield of DA and TA. Among the various catalysts investigated, the 5Fe-5Ni/AC catalyst that contain 10 wt% of total metal loading, demonstrated highest catalytic performance under moderate reaction conditions with 505.08 m²/g and 16,061.62 µmolg⁻¹ of surface area and strong acid sites, respectively. The catalyst’s high acidity resulted in high glycerol conversion (88.8 %) with 50.5 % MA yield and 38.3 % of DA+TA. This study highlights the potential of Fe-Ni/AC catalysts for glycerol acetylation. A novel metal combination for the development of solid acid heterogeneous catalyst with improved catalytic performance.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"10 ","pages":"Article 100248"},"PeriodicalIF":0.0,"publicationDate":"2025-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829351","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":"Starch, pectin and chitosan-based bioplastics with silver nanoparticles: An eco-friendly alternative for the food industry","authors":"Bruno Rafael Nogueira ,&nbsp;Bianca Pizzorno Backx ,&nbsp;Thais Delazare","doi":"10.1016/j.scenv.2025.100246","DOIUrl":"10.1016/j.scenv.2025.100246","url":null,"abstract":"<div><div>Pollution from non-degradable materials is currently a socio-environmental obstacle that afflicts the world. In response to this, the development of bioplastics has become an interesting option to replace the use of synthetic materials in various industries, including the food industry. Bioplastics are developed based on biodegradable materials, such as polysaccharides, proteins and their derivatives. The decision was made to create films with pectin and starch in a chitosan matrix, aiming at their gelling and thickening properties. Finally, in addition to focusing the research on the production of biodegradable bioplastics, the article also seeks to address the study of silver nanoparticles, whose antimicrobial action allows their use in the food industry. This article will describe the production of bioplastics based on these biopolymers and silver nanoparticles and their potential applications in the food sector as a replacement for conventional plastics, such as PVC films. Thus, the research article proposes the development of highly efficient bioplastics that not only eliminate potential health and environmental risks but also offer a hopeful solution to this urgent issue.</div></div>","PeriodicalId":101196,"journal":{"name":"Sustainable Chemistry for the Environment","volume":"10 ","pages":"Article 100246"},"PeriodicalIF":0.0,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}