This study presents an integrated hydrometallurgical approach for valorizing strontium ferrite sludge generated from the magnet manufacturing industry by selectively recovering iron (Fe) and strontium (Sr) into high-purity products. The process employed sulfuric acid leaching under optimized conditions (4.0 mol L−1 H2SO4, 90 °C, solid-to-liquid ratio of 40 g L−1), achieving near-complete Fe dissolution while simultaneously precipitating Sr as strontium sulfate (SrSO4). The Fe-rich leachate underwent pH-controlled precipitation followed by thermal treatment to yield phase-pure hematite (α-Fe2O3). In parallel, the SrSO4 precipitate was converted to strontium carbonate (SrCO3) via a double-ion replacement reaction with aqueous Na2CO3, which proceeded to completion within 1.5 h and yielded a high-purity product with platelet-like morphology. This integrated process offers a sustainable, economically viable pathway to transform industrial waste into two valuable materials, thereby advancing circular-economy principles and sustainable waste-management strategies in the magnet manufacturing sector.
本研究提出了一种综合湿法冶金方法，通过选择性地回收铁（Fe）和锶（Sr）获得高纯度产品，对磁铁制造业产生的锶铁氧体污泥进行增值。该工艺采用硫酸浸出，在优化条件下（4.0 mol L−1 H2SO4, 90℃，固液比40 g L−1），实现了铁的近乎完全溶解，同时以硫酸锶（SrSO4）的形式析出锶。富铁渗滤液经ph控制沉淀后热处理得到相纯赤铁矿（α-Fe2O3）。同时，SrSO4沉淀物通过与Na2CO3水溶液的双离子置换反应转化为碳酸锶（SrCO3），该反应在1.5小时内完成，并产生了具有血小板样形态的高纯度产品。这一综合过程提供了一条可持续的、经济上可行的途径，将工业废物转化为两种有价值的材料，从而推进了磁铁制造部门的循环经济原则和可持续废物管理战略。
{"title":"Hydrometallurgical valorization of strontium ferrite magnet sludge for the selective production of high-purity hematite (α-Fe2O3) and strontium carbonate (SrCO3)","authors":"Chaiyasit Longbutsri , Tanongsak Yingnakorn , Thanapon Chandakhiaw , Chatisa Kansomket , Sirunya Somla , Natthicha Ma-Ud , Muwafaq A. Rabeea , Tapany Patcharawit , Sakhob Khumkoa","doi":"10.1016/j.crgsc.2026.100507","DOIUrl":"10.1016/j.crgsc.2026.100507","url":null,"abstract":"<div><div>This study presents an integrated hydrometallurgical approach for valorizing strontium ferrite sludge generated from the magnet manufacturing industry by selectively recovering iron (Fe) and strontium (Sr) into high-purity products. The process employed sulfuric acid leaching under optimized conditions (4.0 mol L<sup>−1</sup> H<sub>2</sub>SO<sub>4</sub>, 90 °C, solid-to-liquid ratio of 40 g L<sup>−1</sup>), achieving near-complete Fe dissolution while simultaneously precipitating Sr as strontium sulfate (SrSO<sub>4</sub>). The Fe-rich leachate underwent pH-controlled precipitation followed by thermal treatment to yield phase-pure hematite (α-Fe<sub>2</sub>O<sub>3</sub>). In parallel, the SrSO<sub>4</sub> precipitate was converted to strontium carbonate (SrCO<sub>3</sub>) via a double-ion replacement reaction with aqueous Na<sub>2</sub>CO<sub>3</sub>, which proceeded to completion within 1.5 h and yielded a high-purity product with platelet-like morphology. This integrated process offers a sustainable, economically viable pathway to transform industrial waste into two valuable materials, thereby advancing circular-economy principles and sustainable waste-management strategies in the magnet manufacturing sector.</div></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"12 ","pages":"Article 100507"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973263","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}
Pub Date : 2026-01-01DOI: 10.1016/j.crgsc.2026.100506
P. Satishkumar , Arun M. Isloor , Somasekhara Rao Todeti , Ramin Farnood
This study presents the successful synthesis of two-dimensional titanium MXene Ti3C2Tx and its incorporation into polyphenylsulfone membranes for enhanced water purification. The titanium MXene-embedded polyphenylsulfone exhibited a significant increase in water permeation, achieving a flux of 244 L m−2 h−1 compared to 93 L m−2 h−1 in polyphenylsulfone membrane without the MXene additive. The modified membrane also demonstrated improved hydrophilicity, as evidenced by a decrease in water contact angle from 82.8° to 69°, facilitating greater water affinity and transport. In dye filtration tests, the optimal membrane achieved high removal efficiencies of 95.83 % for reactive black 5 dye and 81.7 % for reactive orange 16 dye, along with a remarkable 98.2 % removal of humic acid. Fabricated membrane is successful in rejecting 78.4 % of antibiotic named tetracycline. These results highlight the potential of titanium MXene as an additive to enhance the performance of polyphenylsulfone membranes, providing an effective solution for high-flux, selective water purification applications.
本研究成功合成了二维钛MXene Ti3C2Tx，并将其掺入聚苯砜膜中，以增强水的净化效果。钛MXene包埋的聚苯砜膜的水渗透通量显著增加，达到244 L m−2 h−1，而未添加MXene的聚苯砜膜的水渗透通量为93 L m−2 h−1。改性膜的亲水性也得到了改善，水接触角从82.8°降低到69°，有利于提高亲水性和运输能力。在染料过滤试验中，最优膜对活性黑色5染料的去除率为95.83%，对活性橙色16染料的去除率为81.7%，对腐植酸的去除率为98.2%。合成膜对四环素类抗生素的排异率为78.4%。这些结果突出了钛MXene作为添加剂增强聚苯砜膜性能的潜力，为高通量、选择性水净化应用提供了有效的解决方案。
{"title":"Engineering high flux 2D titanium MXene incorporated membranes for broad spectrum pollutant rejection","authors":"P. Satishkumar , Arun M. Isloor , Somasekhara Rao Todeti , Ramin Farnood","doi":"10.1016/j.crgsc.2026.100506","DOIUrl":"10.1016/j.crgsc.2026.100506","url":null,"abstract":"<div><div>This study presents the successful synthesis of two-dimensional titanium MXene Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> and its incorporation into polyphenylsulfone membranes for enhanced water purification. The titanium MXene-embedded polyphenylsulfone exhibited a significant increase in water permeation, achieving a flux of 244 L m<sup>−2</sup> h<sup>−1</sup> compared to 93 L m<sup>−2</sup> h<sup>−1</sup> in polyphenylsulfone membrane without the MXene additive. The modified membrane also demonstrated improved hydrophilicity, as evidenced by a decrease in water contact angle from 82.8° to 69°, facilitating greater water affinity and transport. In dye filtration tests, the optimal membrane achieved high removal efficiencies of 95.83 % for reactive black 5 dye and 81.7 % for reactive orange 16 dye, along with a remarkable 98.2 % removal of humic acid. Fabricated membrane is successful in rejecting 78.4 % of antibiotic named tetracycline. These results highlight the potential of titanium MXene as an additive to enhance the performance of polyphenylsulfone membranes, providing an effective solution for high-flux, selective water purification applications.</div></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"12 ","pages":"Article 100506"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146034735","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}
Pub Date : 2026-01-01DOI: 10.1016/j.crgsc.2026.100508
Farzaneh Mohamadpour
We have created a sustainable process for the green, efficient, and straightforward synthesis of 2-amino-7-hydroxy-4-aryl-4H-chromene-3-carbonitrile derivatives. A domino Knoevenagel-Michael cyclocondensation reaction is used in the procedure. A green, inexpensive, and efficient organocatalyst, α-amino acid; (±)-aspartic acid, is used to catalyze the reaction at reflux in an aqueous medium. Principles of sustainable chemistry are applied in this process. Reactions occur more quickly, producing very good to high yields. It doesn't use the chromatographic method to separate mixtures. This is a cheap and simple method. It is quick and convenient because it combines several steps into one-pot.
我们创造了一种绿色、高效、直接合成2-氨基-7-羟基-4-芳基-4- h -铬-3-碳腈衍生物的可持续工艺。该方法采用多米诺骨牌Knoevenagel-Michael环缩合反应。一种绿色、廉价、高效的有机催化剂α-氨基酸；（±）-天冬氨酸，用于在水介质中催化回流反应。在这个过程中应用了可持续化学原理。反应发生得更快，产率很高。它不使用色谱法分离混合物。这是一种既便宜又简单的方法。它既快捷又方便，因为它把几个步骤结合在一起。
{"title":"α-Amino acid; (±)-aspartic acid catalyzed green synthesis of 2-amino-7-hydroxy-4-aryl-4H-chromene-3-carbonitrile derivatives in aqueous medium","authors":"Farzaneh Mohamadpour","doi":"10.1016/j.crgsc.2026.100508","DOIUrl":"10.1016/j.crgsc.2026.100508","url":null,"abstract":"<div><div>We have created a sustainable process for the green, efficient, and straightforward synthesis of 2-amino-7-hydroxy-4-aryl-4<em>H</em>-chromene-3-carbonitrile derivatives. A domino Knoevenagel-Michael cyclocondensation reaction is used in the procedure. A green, inexpensive, and efficient organocatalyst, α-amino acid; (±)-aspartic acid, is used to catalyze the reaction at reflux in an aqueous medium. Principles of sustainable chemistry are applied in this process. Reactions occur more quickly, producing very good to high yields. It doesn't use the chromatographic method to separate mixtures. This is a cheap and simple method. It is quick and convenient because it combines several steps into one-pot.</div></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"12 ","pages":"Article 100508"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146074232","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}
Present work describes the development of performance enhancement of polyphenylsulfone (PPSU) membranes by incorporating polyaniline nanofiber-bentonite (PANI-bentonite) nanohybrid in the membrane matrix via immersion precipitation method, as an effective strategy for removing proteins from contaminated water. The hydrophilic PANI-bentonite nanohybrid was successfully synthesized and characterized. Several instrumental techniques like SEM, AFM, TEM, EDX and BET analysis were used to study the morphological changes during the incorporation of nanohybrid in the PPSU membranes. Experimental results revealed that hydrophilic PANI-bentonite content in the membrane is responsible for the formation of an effective cavities in the composite membranes and enhanced properties like porosity, hydrophilicity and water intake abilities of the modified PPSU composite membranes. Moreover, inclusion of PANI-bentonite nanohybrid increased the permeability and showed the highest results for PBM-2 membrane, which showed a permeability of 181 Lm−2h−1 bar−1 compared to the pristine membrane with a permeability 106 Lm−2h−1 bar−1. The outcomes of the various studies showed that the nanocomposite membrane's fouling resistance increased from 51.4 % for the pristine membrane to 82.8 % for the PBM-2 membrane. Protein filtration efficiency analysis of the developed membranes revealed that PBM-2 membrane with 1 w% PANI-bentonite has high rejection for BSA, egg albumin and pepsin, exhibited 96.7 %, 95.2 % and 68.8 % efficiencies respectively.
{"title":"Sustainable nanohybrid modified polyphenylsulfone ultrafiltration membranes for efficient protein separation","authors":"H.R. Panchami , Arun M. Isloor , B.M. Dodamani , A.M. Vijesh","doi":"10.1016/j.crgsc.2025.100500","DOIUrl":"10.1016/j.crgsc.2025.100500","url":null,"abstract":"<div><div>Present work describes the development of performance enhancement of polyphenylsulfone (PPSU) membranes by incorporating polyaniline nanofiber-bentonite (PANI-bentonite) nanohybrid in the membrane matrix via immersion precipitation method, as an effective strategy for removing proteins from contaminated water. The hydrophilic PANI-bentonite nanohybrid was successfully synthesized and characterized. Several instrumental techniques like SEM, AFM, TEM, EDX and BET analysis were used to study the morphological changes during the incorporation of nanohybrid in the PPSU membranes. Experimental results revealed that hydrophilic PANI-bentonite content in the membrane is responsible for the formation of an effective cavities in the composite membranes and enhanced properties like porosity, hydrophilicity and water intake abilities of the modified PPSU composite membranes. Moreover, inclusion of PANI-bentonite nanohybrid increased the permeability and showed the highest results for PBM-2 membrane, which showed a permeability of 181 Lm<sup>−2</sup>h<sup>−1</sup> bar<sup>−1</sup> compared to the pristine membrane with a permeability 106 Lm<sup>−2</sup>h<sup>−1</sup> bar<sup>−1</sup>. The outcomes of the various studies showed that the nanocomposite membrane's fouling resistance increased from 51.4 % for the pristine membrane to 82.8 % for the PBM-2 membrane. Protein filtration efficiency analysis of the developed membranes revealed that PBM-2 membrane with 1 w% PANI-bentonite has high rejection for BSA, egg albumin and pepsin, exhibited 96.7 %, 95.2 % and 68.8 % efficiencies respectively.</div></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"12 ","pages":"Article 100500"},"PeriodicalIF":0.0,"publicationDate":"2025-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145750215","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}
Pub Date : 2025-01-01DOI: 10.1016/j.crgsc.2025.100448
Jörg Eberz , Lara Strehl , Marcel Mann , Andreas Jupke , Jørgen Barsett Magnus
The economic competitiveness of bio-based production processes is often hindered by the high costs associated with downstream processing, compared to fossil-based methods. Liquid-liquid extraction is a widely used technique for aqueous fermentation systems and offers significant cost-saving potential, especially if extraction could be performed directly from the fermentation broth without prior cell separation. However, this is often hindered by the formation of "crud" — a deposit or emulsion at the interface between two partially settled phases. This study investigates the liquid-liquid phase separation of Corynebacterium glutamicum DM 1933 fermentation broths using five different solvents. We systematically examined the impact of cell surface properties, modified through nutrient concentration, on crud formation. In addition, the variation in salt concentration and pH after fermentation was analysed. Our findings show that the present nutrient concentration influences the cell surface properties and, consequently, crud formation. A more hydrophilic cell surface was present at a lower phosphate concentration, whereas a more hydrophobic cell surface was measured for a lower nitrogen and iron concentration. With a more hydrophobic cell surface, the fermentation broth showed a large crud phase, while a decrease in crud formation could be seen for fermentation broths with a more hydrophilic cell surface. Furthermore, the crud formation is influenced by the pH, cell and salt concentration and strongly by the used solvent.
{"title":"Phase separation behaviour during direct solvent extraction of Corynebacterium glutamicum fermentation broth – Systematic study of crud suppression","authors":"Jörg Eberz , Lara Strehl , Marcel Mann , Andreas Jupke , Jørgen Barsett Magnus","doi":"10.1016/j.crgsc.2025.100448","DOIUrl":"10.1016/j.crgsc.2025.100448","url":null,"abstract":"<div><div>The economic competitiveness of bio-based production processes is often hindered by the high costs associated with downstream processing, compared to fossil-based methods. Liquid-liquid extraction is a widely used technique for aqueous fermentation systems and offers significant cost-saving potential, especially if extraction could be performed directly from the fermentation broth without prior cell separation. However, this is often hindered by the formation of \"crud\" — a deposit or emulsion at the interface between two partially settled phases. This study investigates the liquid-liquid phase separation of <em>Corynebacterium glutamicum</em> DM 1933 fermentation broths using five different solvents. We systematically examined the impact of cell surface properties, modified through nutrient concentration, on crud formation. In addition, the variation in salt concentration and pH after fermentation was analysed. Our findings show that the present nutrient concentration influences the cell surface properties and, consequently, crud formation. A more hydrophilic cell surface was present at a lower phosphate concentration, whereas a more hydrophobic cell surface was measured for a lower nitrogen and iron concentration. With a more hydrophobic cell surface, the fermentation broth showed a large crud phase, while a decrease in crud formation could be seen for fermentation broths with a more hydrophilic cell surface. Furthermore, the crud formation is influenced by the pH, cell and salt concentration and strongly by the used solvent.</div></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"10 ","pages":"Article 100448"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548532","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}
This research presents facile and short-time synthesis of zeolite Na–P supported by nanozinc oxide (nano-ZnO), demonstrating significant progress in developing antibacterial agents. Zeolites Na–P synthesized from Narathiwat kaolinite and silica derived from sugarcane bagasse ash were prepared by refluxing at 100 °C for 8 h. The zeolites Na–P were then functionalized with nano-ZnO in concentrations of 1 % w/w, 3 % w/w, and 5 % w/w in an ultrasound bath at 70 °C for 15 min and stirred with 1400 rpm at 70 °C for 3 h to form nanocomposites. The composites were characterized using X-ray diffraction, Fourier-transform infrared spectroscopy, and scanning electron microscopy, which confirmed the successful integration of nano-ZnO without affecting the crystal structure of the zeolites. The antibacterial efficacy of the synthesized nanocomposites against various gram-positive and gram-negative bacteria, including Staphylococcus aureus and Escherichia coli, was evaluated using the disc diffusion method. The zeolites loaded with 3 % w/w nano-ZnO exhibited the highest antibacterial activity, outperforming the other formulations. The potential of zeolites Na–P is supported by nano-ZnO as a highly effective antibacterial agent, which has important implications for applications in healthcare and environmental remediation.
{"title":"Facile preparation of zeolite Na–P supported by nanozinc oxide for antibacterials","authors":"Sakesit Duangkham , Rattana Pengproh , Pattaranun Thuadaij","doi":"10.1016/j.crgsc.2025.100459","DOIUrl":"10.1016/j.crgsc.2025.100459","url":null,"abstract":"<div><div>This research presents facile and short-time synthesis of zeolite Na–P supported by nanozinc oxide (nano-ZnO), demonstrating significant progress in developing antibacterial agents. Zeolites Na–P synthesized from Narathiwat kaolinite and silica derived from sugarcane bagasse ash were prepared by refluxing at 100 °C for 8 h. The zeolites Na–P were then functionalized with nano-ZnO in concentrations of 1 % w/w, 3 % w/w, and 5 % w/w in an ultrasound bath at 70 °C for 15 min and stirred with 1400 rpm at 70 °C for 3 h to form nanocomposites. The composites were characterized using X-ray diffraction, Fourier-transform infrared spectroscopy, and scanning electron microscopy, which confirmed the successful integration of nano-ZnO without affecting the crystal structure of the zeolites. The antibacterial efficacy of the synthesized nanocomposites against various gram-positive and gram-negative bacteria, including <em>Staphylococcus aureus</em> and <em>Escherichia coli</em>, was evaluated using the disc diffusion method. The zeolites loaded with 3 % w/w nano-ZnO exhibited the highest antibacterial activity, outperforming the other formulations. The potential of zeolites Na–P is supported by nano-ZnO as a highly effective antibacterial agent, which has important implications for applications in healthcare and environmental remediation.</div></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"10 ","pages":"Article 100459"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144089619","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}
The application of metal organic frameworks (MOFs) in the field of wastewater treatment has gained significant scientific focus in the recent years. However, the use of hazardous solvents during the synthesis of MOFs restrains their large scale synthesis and industrial level applications. Thus green and safer solvents are required, which can efficiently replace the toxic solvents conventionally used during the synthesis of MOFs. The application of cleaner green solvents can cause drastic alleviation in the toxic wastes produced from the industrial scale synthesis of MOFs. Many green solvents (bio-derived and non-bio-derived) have found their applications in different areas of scientific research. Green solvents, such as water, super critical CO2, ionic liquids, deep-eutectic solvents, certain alcohols, gamma-valerolactone and cyrene have been efficiently explored for the synthesis of different types of MOFs suitable for waste water treatment. This review highlights the application of these solvents for the engineering of MOFs for water treatment. The research works from the last eight years (2018–2025) involving the use of suitable biogenic/green solvents for the synthesis of MOFs specifically applicable for water/wastewater treatment applications have been reviewed intricately for the first time. The challenges associated with the application of these solvents have been presented in detail. The recent strategies adopted by the researchers to overcome the existing challenges and obtain high quality MOFs in these solvents have been discussed.
{"title":"Exploring biogenic/ green solvents on the sustainable development of metal organic frameworks for waste water treatment","authors":"Rajeev Agrawal , Urmila Chakraborty , Saurabh Singh","doi":"10.1016/j.crgsc.2025.100462","DOIUrl":"10.1016/j.crgsc.2025.100462","url":null,"abstract":"<div><div>The application of metal organic frameworks (MOFs) in the field of wastewater treatment has gained significant scientific focus in the recent years. However, the use of hazardous solvents during the synthesis of MOFs restrains their large scale synthesis and industrial level applications. Thus green and safer solvents are required, which can efficiently replace the toxic solvents conventionally used during the synthesis of MOFs. The application of cleaner green solvents can cause drastic alleviation in the toxic wastes produced from the industrial scale synthesis of MOFs. Many green solvents (bio-derived and non-bio-derived) have found their applications in different areas of scientific research. Green solvents, such as water, super critical CO<sub>2</sub>, ionic liquids, deep-eutectic solvents, certain alcohols, gamma-valerolactone and cyrene have been efficiently explored for the synthesis of different types of MOFs suitable for waste water treatment. This review highlights the application of these solvents for the engineering of MOFs for water treatment. The research works from the last eight years (2018–2025) involving the use of suitable biogenic/green solvents for the synthesis of MOFs specifically applicable for water/wastewater treatment applications have been reviewed intricately for the first time. The challenges associated with the application of these solvents have been presented in detail. The recent strategies adopted by the researchers to overcome the existing challenges and obtain high quality MOFs in these solvents have been discussed.</div></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"10 ","pages":"Article 100462"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144106641","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}
Pub Date : 2025-01-01DOI: 10.1016/j.crgsc.2025.100463
Mohammad Javad Emami, Jafar Towfighi Darian, Masoud Safari Yazd
This study presents a nitrogen-modified SAPO-34 catalyst (SPG), synthesized via a green templated method using coffee powder, to improve the efficiency and stability of the methanol-to-olefins (MTO) process. Compared to conventional SAPO-34 (SP), SPG demonstrates enhanced selectivity, stability, and longevity. Characterization shows a smaller crystallite size (38 nm vs. 46 nm), increased nitrogen incorporation, and well-distributed active sites, improving catalytic activity. Optimized acidity in SPG enhances methanol conversion while reducing coke formation. MD simulations reveal that nitrogen modification improves methanol retention and adsorption energy, promoting ethylene production. Performance tests show SPG achieving 92.6 % light olefin selectivity for 360 min, outperforming SP. Additionally, SPG exhibits superior hydrothermal stability and reduced coke deposition, making it a promising eco-friendly and cost-effective catalyst for industrial MTO applications.
{"title":"A green templated and nitrogen-incorporated SAPO-34 catalyst for enhanced MTO performance","authors":"Mohammad Javad Emami, Jafar Towfighi Darian, Masoud Safari Yazd","doi":"10.1016/j.crgsc.2025.100463","DOIUrl":"10.1016/j.crgsc.2025.100463","url":null,"abstract":"<div><div>This study presents a nitrogen-modified SAPO-34 catalyst (SPG), synthesized via a green templated method using coffee powder, to improve the efficiency and stability of the methanol-to-olefins (MTO) process. Compared to conventional SAPO-34 (SP), SPG demonstrates enhanced selectivity, stability, and longevity. Characterization shows a smaller crystallite size (38 nm vs. 46 nm), increased nitrogen incorporation, and well-distributed active sites, improving catalytic activity. Optimized acidity in SPG enhances methanol conversion while reducing coke formation. MD simulations reveal that nitrogen modification improves methanol retention and adsorption energy, promoting ethylene production. Performance tests show SPG achieving 92.6 % light olefin selectivity for 360 min, outperforming SP. Additionally, SPG exhibits superior hydrothermal stability and reduced coke deposition, making it a promising eco-friendly and cost-effective catalyst for industrial MTO applications.</div></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"10 ","pages":"Article 100463"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144155086","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}
Pub Date : 2025-01-01DOI: 10.1016/j.crgsc.2025.100481
Sabreena Jan , Nayeema Jan , Seema Singh , Muhammad Ashraf Shah , Mansoor Ahmad Malik
The field of nanotechnology is capturing the attention of more and more researchers in their scholarly investigations. The presence of biologically active compounds in medicinal plants makes them an excellent choice for the synthesis of nanoparticles. This paper details the formation of crystalline silver nanoparticles (AgNPs) using a simple and environmentally friendly green synthesis technique. The nanoparticles were synthesized using plant extract of Taxus wallichiana as the reducing agent. Various analytical methods, including X-Ray Diffraction (XRD), UV–Visible spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR), and Field Emission Scanning Electron Microscopy (FESEM), were employed to investigate the size and structure of the synthesized particles. The as-synthesized AgNPs exhibited a prominent absorption peak at 425 nm. The FTIR spectrum of the AgNPs featured multiple spectral bands across the 300–4000 cm−1 region. XRD analysis confirmed the successful formation of silver nanoparticles, with the synthesized sample exhibiting distinct diffraction peaks at 2θ values of 37.09°, 43.29°, 65.32°, and 76.40°. The biosynthesized AgNPs formed spherical aggregates at the nanoscale, with particle diameters ranging from approximately 60 to 80 nm as revealed by FESEM. They were found to be effective against a variety of fungal pathogens, such as Aspergillus niger, A. fumigatus, Fusarium oxysporum, and Penicillium expansum, as well as bacterial strains including Staphylococcus aureus, Escherichia coli, Proteus vulgaris, and Klebsiella pneumoniae. The nanoparticles demonstrated inhibition zones of varying diameters at different concentrations, with Nystatin and Kanamycin serving as positive controls for the fungal and bacterial species, respectively. The largest inhibition zone (18.42 ± 0.43 mm) was observed at the highest dose (0.4 mg/ml) for Penicillium expansum, while the smallest (10.18 ± 0.13 mm) was noted at the lowest dose (0.2 mg/ml) for Aspergillus niger. For bacteria, the highest dose (2.5 mg/ml) produced the largest inhibition zone (12.78 ± 0.17 mm) in Klebsiella pneumoniae, while the lowest dose (l.9 mg/ml) led to the smallest inhibition zone (8.85 ± 0.25 mm) in Proteus vulgaris. The study revealed that the synthesized nanoparticles showed greater inhibition against fungal species than against bacterial species. This study provides evidence that green-synthesized AgNPs from the leaf extract of Taxus wallichiana can be effective against a wide range of pathogen species.
{"title":"Crystalline defenders: Silver nanoparticles as a new front in antimicrobial warfare","authors":"Sabreena Jan , Nayeema Jan , Seema Singh , Muhammad Ashraf Shah , Mansoor Ahmad Malik","doi":"10.1016/j.crgsc.2025.100481","DOIUrl":"10.1016/j.crgsc.2025.100481","url":null,"abstract":"<div><div>The field of nanotechnology is capturing the attention of more and more researchers in their scholarly investigations. The presence of biologically active compounds in medicinal plants makes them an excellent choice for the synthesis of nanoparticles. This paper details the formation of crystalline silver nanoparticles (AgNPs) using a simple and environmentally friendly green synthesis technique. The nanoparticles were synthesized using plant extract of <em>Taxus wallichiana</em> as the reducing agent. Various analytical methods, including X-Ray Diffraction (XRD), UV–Visible spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR), and Field Emission Scanning Electron Microscopy (FESEM), were employed to investigate the size and structure of the synthesized particles. The as-synthesized AgNPs exhibited a prominent absorption peak at 425 nm. The FTIR spectrum of the AgNPs featured multiple spectral bands across the 300–4000 cm<sup>−1</sup> region. XRD analysis confirmed the successful formation of silver nanoparticles, with the synthesized sample exhibiting distinct diffraction peaks at 2θ values of 37.09°, 43.29°, 65.32°, and 76.40°. The biosynthesized AgNPs formed spherical aggregates at the nanoscale, with particle diameters ranging from approximately 60 to 80 nm as revealed by FESEM. They were found to be effective against a variety of fungal pathogens, such as <em>Aspergillus niger</em>, <em>A. fumigatus</em>, <em>Fusarium oxysporum</em>, and <em>Penicillium expansum</em>, as well as bacterial strains including <em>Staphylococcus aureus</em>, <em>Escherichia coli</em>, <em>Proteus vulgaris</em>, and <em>Klebsiella pneumoniae</em>. The nanoparticles demonstrated inhibition zones of varying diameters at different concentrations, with Nystatin and Kanamycin serving as positive controls for the fungal and bacterial species, respectively. The largest inhibition zone (18.42 ± 0.43 mm) was observed at the highest dose (0.4 mg/ml) for <em>Penicillium expansum</em>, while the smallest (10.18 ± 0.13 mm) was noted at the lowest dose (0.2 mg/ml) for <em>Aspergillus niger</em>. For bacteria, the highest dose (2.5 mg/ml) produced the largest inhibition zone (12.78 ± 0.17 mm) in <em>Klebsiella pneumoniae</em>, while the lowest dose (l.9 mg/ml) led to the smallest inhibition zone (8.85 ± 0.25 mm) in <em>Proteus vulgaris</em>. The study revealed that the synthesized nanoparticles showed greater inhibition against fungal species than against bacterial species. This study provides evidence that green-synthesized AgNPs from the leaf extract of <em>Taxus wallichiana</em> can be effective against a wide range of pathogen species.</div></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"11 ","pages":"Article 100481"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144925040","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}
Pub Date : 2025-01-01DOI: 10.1016/j.crgsc.2025.100494
Laleh Golestanifar, Ali Reza Sardarian
Ternary natural deep eutectic solvent (TNADES) made of choline chloride, glycerol, and l-arginine was used as an efficient, new reusable solvent/catalyst media for (i) the synthesis of 2-substituted-2,3-dihydroquinazolin-4(1H)-ones through eco-friendly one-pot three-component reaction involving isatoic anhydride, ammonium acetate, various aldehydes or ketones, (ii) synthesis of spirooxindoles consisting of different isatines, malononitrile, and various nucleophiles such as 1,3-dicarbonyl compounds/4H coumarin/α-naphthol, and (iii) the synthesis of pyrazole-4-carbonitriles using the most common raw materials such as phenylhydrazine, malononitrile, or ethyl cyanoacetate and various aldehydes under similar conditions. This solvent/catalyst media is easily and atomic economically synthesized and characterized by FT-IR, TGA, DSC, CV, viscosity, density, refractive index, ionic conductivity, potential of hydrogen (pH), and optical activity. The advantages of this method are the use of recyclable natural and environmentally friendly DES as a dual solvent/catalyst mixture, good to excellent efficiency, and safe and clean operation.
{"title":"Choline chloride/glycerol/l-arginine (TNADES) as a new sustainable solvent catalyst reaction media in multicomponent synthesis of biological corestones of 2,3-dihydroquinazolin-4(1H)-ones, spiro-2-oxindoles and pyrazole-4-carbonitriles under mild conditions","authors":"Laleh Golestanifar, Ali Reza Sardarian","doi":"10.1016/j.crgsc.2025.100494","DOIUrl":"10.1016/j.crgsc.2025.100494","url":null,"abstract":"<div><div>Ternary natural deep eutectic solvent (TNADES) made of choline chloride, glycerol, and <span>l</span>-arginine was used as an efficient, new reusable solvent/catalyst media for (i) the synthesis of 2-substituted-2,3-dihydroquinazolin-4(1<em>H</em>)-ones through eco-friendly one-pot three-component reaction involving isatoic anhydride, ammonium acetate, various aldehydes or ketones, (ii) synthesis of spirooxindoles consisting of different isatines, malononitrile, and various nucleophiles such as 1,3-dicarbonyl compounds/4<em>H</em> coumarin/α-naphthol, and (iii) the synthesis of pyrazole-4-carbonitriles using the most common raw materials such as phenylhydrazine, malononitrile, or ethyl cyanoacetate and various aldehydes under similar conditions. This solvent/catalyst media is easily and atomic economically synthesized and characterized by FT-IR, TGA, DSC, CV, viscosity, density, refractive index, ionic conductivity, potential of hydrogen (pH), and optical activity. The advantages of this method are the use of recyclable natural and environmentally friendly DES as a dual solvent/catalyst mixture, good to excellent efficiency, and safe and clean operation.</div></div>","PeriodicalId":296,"journal":{"name":"Current Research in Green and Sustainable Chemistry","volume":"11 ","pages":"Article 100494"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145462787","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}
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