RSC sustainability最新文献_第5页

Cannabis sativa biochar: characterization and preliminary application in plant growth and adsorption, and as an electrode material† 大麻生物炭：表征及其在植物生长和吸附中的初步应用，并作为电极材料†

RSC sustainability Pub Date : 2025-03-04 DOI: 10.1039/D4SU00829D

Maria Belen Ceretta, Sofia Antic Gorrazzi, Sebastian D’Ippolito, Julieta Mendieta, Debora Nercessian and Sebastian Bonanni

引用次数: 0

An aqua regia-free chemical recovery and reprecipitation of Ir from IrOx catalysts: optimisation of the extraction efficiency using surface response methodology† 从IrOx催化剂中无王水的化学回收和再沉淀：使用表面响应方法优化提取效率

RSC sustainability Pub Date : 2025-03-03 DOI: 10.1039/D5SU00038F

Sarah Turnbull, Delphine Clauss, Vincent Martin, Jean-Pierre Magnin, Laetitia Dubau and Frédéric Maillard

{"title":"An aqua regia-free chemical recovery and reprecipitation of Ir from IrOx catalysts: optimisation of the extraction efficiency using surface response methodology†","authors":"Sarah Turnbull, Delphine Clauss, Vincent Martin, Jean-Pierre Magnin, Laetitia Dubau and Frédéric Maillard","doi":"10.1039/D5SU00038F","DOIUrl":"https://doi.org/10.1039/D5SU00038F","url":null,"abstract":"The widespread deployment of hydrogen is essential in the energy transition away from fossil fuels. There is an increasing demand for iridium (Ir) in the proton-exchange membrane water electrolysis (PEMWE) industry, acting as the catalyst for the oxygen evolution reaction (OER). However, Ir is one of the rarest platinum group metals (PGMs) and its recycling requires significant energy and has considerable environmental impacts. Therefore, developing an innovative energy-efficient recycling method is essential to enhance the use of Ir. This study focuses on the development of a microwave-assisted leaching protocol of Ir from a commercial iridium oxide (IrOx) catalyst and its reprecipitation in the form of a salt. A Box–Behnken optimisation of the Ir leaching efficiency was performed by varying the temperature (70–200 °C), chloride concentration ([Cl−]) (0–4 M) and hydrogen peroxide concentration ([H2O2]) (0–3% v/v). An optimum of 91% extraction efficiency was predicted and then confirmed experimentally, achieving an Ir leaching efficiency of 83 ± 10%, which corresponds to an Ir mass extraction of 769 mgIr gIrOx−1. The precipitation of the Ir leachate solution was then performed to obtain Ir in the form of ammonium hexachloroiridate ((NH4)2IrCl6) with 94.6% purity.","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 4","pages":" 1741-1750"},"PeriodicalIF":0.0,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/su/d5su00038f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761628","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}

引用次数: 0

Synthetic routes and fields of application of isohexides: comprehensive perspective of relevant industrial compounds 异己酯的合成路线及应用领域：相关工业化合物的综合展望

RSC sustainability Pub Date : 2025-03-03 DOI: 10.1039/D5SU00011D

Daria Armani

{"title":"Synthetic routes and fields of application of isohexides: comprehensive perspective of relevant industrial compounds","authors":"Daria Armani","doi":"10.1039/D5SU00011D","DOIUrl":"https://doi.org/10.1039/D5SU00011D","url":null,"abstract":"Isohexides are a class of compounds that can be obtained from natural sources using simple processes, and have interesting properties. Among these, the intrinsic chirality of the rigid bicyclic structural cavity and the presence of two hydroxyl groups in positions 3 and 6, available for functional-group interconversion, appear the most interesting characteristics for real innovative applications. In this review, the strategies for the synthesis of isohexides from polysaccharides and biomasses of different complexities have been analyzed and the alternative processes to the traditional synthetic routes, in terms of sustainability, have been discussed. Secondly, the properties that make isosorbide the most suitable isohexide compound in terms of availability, stability and scalability for innovative production processes have been highlighted. The fields of application of these extremely interesting compounds have been investigated, proceeding with a discussion in which the areas of exploitation of isohexides are analyzed, in terms of their use as building blocks, chiral auxiliaries or constituents of chiral ionic liquids. Finally, the numerous applicative possibilities of isosorbide as a monomer or co-monomer of a wide range of polymeric materials of different natures, have been thoroughly investigated. This review represents a first investigation into the possible uses of isohexide-based compounds by analyzing the positive and negative aspects of their exploitation as ubiquitous alternatives to current oil-based intermediates. Certainly, future studies on the optimization of those production processes that occupy a large share of the chemical-product market will lead to the confirmation of the synthetic potential of compounds with an isohexidic structure.","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 5","pages":" 2134-2148"},"PeriodicalIF":0.0,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/su/d5su00011d?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918910","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}

引用次数: 0

Microplastics in the rough: using data augmentation to identify plastics contaminated by water and plant matter† 粗糙中的微塑料：使用数据增强来识别被水和植物污染的塑料†

RSC sustainability Pub Date : 2025-02-27 DOI: 10.1039/D4SU00612G

Joseph C. Shirley, Kobiny Antony Rex, Hassan Iqbal, Christian G. Claudel and Carlos R. Baiz

{"title":"Microplastics in the rough: using data augmentation to identify plastics contaminated by water and plant matter†","authors":"Joseph C. Shirley, Kobiny Antony Rex, Hassan Iqbal, Christian G. Claudel and Carlos R. Baiz","doi":"10.1039/D4SU00612G","DOIUrl":"https://doi.org/10.1039/D4SU00612G","url":null,"abstract":"Microplastics are present in nearly all environments. The detection of microplastics in the field is an important step toward understanding and regulating the proliferation of plastic waste, particularly in natural environments. Real-time surveys require robust instruments, rapid acquisition, and minimal processing. Near infrared (NIR) spectroscopy is an ideal technique to detect polymer composition regardless of spectral interference by water and/or organic matter. Here we report a fiber-based NIR instrument designed for simple and efficient spectral acquisition of consumer plastic particles across a range of sizes. Data augmentation with measured interferent spectra has been used to generate machine-learning based classification models that can identify polymer compositions in plastic particles that are wet and/or mixed in with organic plant material. These models achieve 98.5% accuracy on synthetic data and 86.4% accuracy when transferred to spectra of plastic particles of nine common polymers with particle sizes as small as 500 μm. Our model paves the way for the development of equipment to perform real-time surveys of microplastic compositions in the field.","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 4","pages":" 1886-1899"},"PeriodicalIF":0.0,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/su/d4su00612g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761597","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}

引用次数: 0

Superior proton conductivity and selectivity in sulfonated ionomer biocomposites containing renewably processed and fractionated lignin† 含有可再生加工和分选木质素†的磺化离聚体生物复合材料具有优异的质子导电性和选择性

RSC sustainability Pub Date : 2025-02-27 DOI: 10.1039/D5SU00031A

Xueting Wang, Mayura Silva, Colleen Clarke, Bronson Lynn, Mark Robertson, Aidan J. Leopold, Oreoluwa Agede, Lilin He, Stephen Creager, Mark E. Roberts, Mark C. Thies and Eric M. Davis

{"title":"Superior proton conductivity and selectivity in sulfonated ionomer biocomposites containing renewably processed and fractionated lignin†","authors":"Xueting Wang, Mayura Silva, Colleen Clarke, Bronson Lynn, Mark Robertson, Aidan J. Leopold, Oreoluwa Agede, Lilin He, Stephen Creager, Mark E. Roberts, Mark C. Thies and Eric M. Davis","doi":"10.1039/D5SU00031A","DOIUrl":"https://doi.org/10.1039/D5SU00031A","url":null,"abstract":"Herein, we have synthesized high-performance, low-cost ionomer biocomposites comprised of sulfonated poly(ether ether ketone) (SPEEK) and softwood Kraft lignin. Specifically, SPEEK ionomer composites containing renewably processed and fractionated low and high molecular weight lignin, at concentrations ranging from 5–25 mass%, were synthesized. After fabrication, the water and ion transport properties, as well as the hydrated nanostructure, of the biocomposites were characterized. Most notably, our SPEEK–lignin composite membranes exhibited proton conductivities and proton selectivities that were two-fold and four-fold higher, respectively, than both neat SPEEK and the current benchmark ionomer for these applications, Nafion. In conjunction with ion exchange capacity and equilibrium water uptake data, as well as real-space imaging from electron microscopy, small-angle neutron scattering data suggested that the introduction of lignin increased the spacing between hydrophilic, ionic domains. As a proof of concept, the feasibility of these membranes as proton exchange membranes (PEMs) was assessed. In vanadium redox flow battery (VRFB) tests, SPEEK–lignin membranes containing 15 mass% lignin exhibited performance (power density, discharge voltage) comparable to that of neat SPEEK membranes. This comparable performance underscores the promise of SPEEK–lignin biocomposites as PEMs for next-generation VRFBs.","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 5","pages":" 2333-2351"},"PeriodicalIF":0.0,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/su/d5su00031a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143918849","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}

引用次数: 0

Vortex fluidic-mediated transesterification enhancement of mongongo fatty acid ethyl ester production for haircare applications† 漩涡流体介导的酯交换反应增强护发用蒙古脂肪酸乙酯的生产

RSC sustainability Pub Date : 2025-02-26 DOI: 10.1039/D4SU00763H

Xuejiao Cao, Xuan Luo, Safira M. Barros, Wenjin Xing, Melanie MacGregor, Iliana Delcheva, Jonathan A. Campbell, Shan He, Bradley P. Kirk, Youhong Tang and Colin L. Raston

{"title":"Vortex fluidic-mediated transesterification enhancement of mongongo fatty acid ethyl ester production for haircare applications†","authors":"Xuejiao Cao, Xuan Luo, Safira M. Barros, Wenjin Xing, Melanie MacGregor, Iliana Delcheva, Jonathan A. Campbell, Shan He, Bradley P. Kirk, Youhong Tang and Colin L. Raston","doi":"10.1039/D4SU00763H","DOIUrl":"https://doi.org/10.1039/D4SU00763H","url":null,"abstract":"Fatty acid ethyl esters (FAEE) are one of the most popular ingredients in the organic cosmetic market due to their versatile functionality. However, its production technique aligning with the principle of green chemistry and adhering to organic standards remains unexplored. This study investigated the use of the vortex fluidic device (VFD), a versatile thin-film processing device that can generate substantial mechanical energy within a rapidly rotating tube, to assist in the sustainable and efficient production of Mongongo FAEE. Using the VFD, a FAEE yield of 92.65% was achieved within 20 minutes of processing, 1.3 times more effective than that attained via bench-top methods. Proton nuclear magnetic resonance (1H NMR) and gas chromatography-mass spectrometry (GC-MS) confirmed the preservation and elevated concentrations of polyunsaturated FAEE following VFD processing. Furthermore, Mongongo FAEE was investigated for its application in hair protection. In a custom hair styling simulation experiment, a comparative analysis of Mongongo oil with FAEE demonstrated that Mongongo FAEE exhibited superior coverage efficiency on the hair surface, masking 95% of sulphur and nitrogen from the hair surface. This results in reduction in pore size, improved surface integrity, enhanced gloss, and minimised cysteine oxidation of hair. In the sun protection test, the FAEE-treated hair demonstrates a uniform morphology after 8 hours of sunlight exposure. Overall, it has been shown that a high yield of Mongongo FAEE was effectively achieved via VFD processing, while also demonstrating the ability to use the product in haircare applications.","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 4","pages":" 1909-1922"},"PeriodicalIF":0.0,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/su/d4su00763h?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761599","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}

引用次数: 0

A high-performance nanofiltration membrane synthesized by embedding amino acids and ionic liquids in cellulose acetate for heavy metal separation 在醋酸纤维素中包埋氨基酸和离子液体合成了用于重金属分离的高性能纳滤膜

RSC sustainability Pub Date : 2025-02-26 DOI: 10.1039/D4SU00688G

D. Teja Nayak, Vinoth Kumar Raja, G. Arthanareeswaran, Tran Dang Khoa and Wirach Taweepreda

{"title":"A high-performance nanofiltration membrane synthesized by embedding amino acids and ionic liquids in cellulose acetate for heavy metal separation","authors":"D. Teja Nayak, Vinoth Kumar Raja, G. Arthanareeswaran, Tran Dang Khoa and Wirach Taweepreda","doi":"10.1039/D4SU00688G","DOIUrl":"https://doi.org/10.1039/D4SU00688G","url":null,"abstract":"Water reclamation is necessary to meet the potable water demand. Heavy metals such as iron, zinc, lead, and copper, particularly in water, pose significant toxicity risks to humans and other biological life. Over the last few years, the contamination level of these heavy metals in water and soils has increased alarmingly. Correspondingly, membrane systems have emerged as a prominent approach to water reclamation. In this study, cellulose acetate (CA) membranes incorporating amino acids (AAs) and ionic liquids (ILs) were fabricated using phase inversion technique and effectively utilized for metal separation. The characterizations of these membranes using FTIR, SEM, TGA, and DSC revealed the presence of various functional groups, changes in surface morphologies, and improvements in thermal stabilities due to AA–IL. The pure water flux (PWF) was increased to 98 L m−2 h−1 at 4 bar pressure owing to the enhancement of hydrophilicity. The rejection percentage of heavy metal ions for AA–IL (0.5%) incorporated CA membranes was 94%. The rejection rates for ions of the heavy metals copper, zinc, iron, and lead present in the industrial effluent were studied and found to be 89%, 91%, 84%, and 90%, respectively. The rejection capacity of the AA–IL (0.5) incorporated CA membrane was the highest for all the metals. The AA–IL incorporated CA membranes are efficient and effective for nanofiltration to treat heavy metal ion solutions.","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 4","pages":" 1966-1981"},"PeriodicalIF":0.0,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/su/d4su00688g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761609","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}

引用次数: 0

Polyhydroxyalkanoate (PHA) production by thermophilic Caldimonas thermodepolymerans comb. nov. from xylan† 聚羟基烷烃酸酯（PHA）的产热嗜热性Caldimonas热解聚菌梳子。十一月源自木聚糖†

RSC sustainability Pub Date : 2025-02-26 DOI: 10.1039/D5SU00040H

Wen Zhou, Salvador Bertrán Llorens, Peter J. Deuss, Gert-Jan W. Euverink and Janneke Krooneman

引用次数: 0

Chemical degradation and recycling of polyethylene terephthalate (PET): a review 聚对苯二甲酸乙二醇酯（PET）的化学降解与回收研究进展

RSC sustainability Pub Date : 2025-02-25 DOI: 10.1039/D4SU00658E

Zhiqiang Guo, Jin Wu and Junhong Wang

引用次数: 0

Preparation of thermally curable materials using lignin extracted from sawmill co-product† 从锯木厂副产品中提取木质素制备热固化材料

RSC sustainability Pub Date : 2025-02-25 DOI: 10.1039/D4SU00767K

Libby J. Marshall, Daniel J. Cheney, Jasmine A. Keith, Christopher Kelly, Frédéric Blanc, Andrew J. West and Dave J. Adams

{"title":"Preparation of thermally curable materials using lignin extracted from sawmill co-product†","authors":"Libby J. Marshall, Daniel J. Cheney, Jasmine A. Keith, Christopher Kelly, Frédéric Blanc, Andrew J. West and Dave J. Adams","doi":"10.1039/D4SU00767K","DOIUrl":"https://doi.org/10.1039/D4SU00767K","url":null,"abstract":"We have exemplified the chemical reactivity of a new commercially available organosolv-like lignin via reaction with various amines to form benzoxazine groups. The resulting benzoxazine-modified lignin has desirable thermal properties, making it an attractive alternative to non-renewable benzoxazine resins. The thermal properties of the lignin-benzoxazine products can be altered by increasing the number of benzoxazine groups within the lignin. This is achieved by increasing the number of unsubstituted phenol groups in the lignin prior to benzoxazine formation, thereby increasing the number of benzoxazine groups added to the lignin. We were ultimately able to form a curable system from phenolated lignin prepared from lignin extracted from low-value biomass using ultrasonic biorefinery technology via functionalisation with benzoxazine groups. The properties of the new lignin-based benzoxazines are compared to those of Kraft lignin (obtained from pulp) modified by the same chemical reactions.","PeriodicalId":74745,"journal":{"name":"RSC sustainability","volume":" 4","pages":" 1870-1885"},"PeriodicalIF":0.0,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/su/d4su00767k?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761596","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}

引用次数: 0