Separation and Purification Technology最新文献

筛选
英文 中文
Covalent organic framework membranes for wastewater treatment: structural design, interfacial modulation, and environmental applications 用于废水处理的共价有机框架膜:结构设计、界面调节和环境应用
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-10-06 DOI: 10.1016/j.seppur.2025.135514
Youngmin Choi, Changwoo Nam
{"title":"Covalent organic framework membranes for wastewater treatment: structural design, interfacial modulation, and environmental applications","authors":"Youngmin Choi, Changwoo Nam","doi":"10.1016/j.seppur.2025.135514","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.135514","url":null,"abstract":"The contamination of water resources by persistent organic pollutants, such as polycyclic aromatic hydrocarbons and chlorinated solvents, and inorganic contaminants, including heavy metals like lead and mercury, poses substantial risks to human health and aquatic ecosystems. Conventional wastewater treatment technologies, including biological degradation, coagulation–flocculation, activated carbon adsorption, and advanced oxidation processes, often exhibit limited efficiency in removing low-concentration or recalcitrant pollutants under variable environmental conditions. Membrane-based separation technologies offer a promising alternative due to their energy efficiency, design flexibility, and selective removal capabilities. Among these, Covalent Organic Frameworks (COFs) have emerged as a next-generation membrane material owing to their crystalline porous structures, high surface areas, and tunable chemical functionalities. COF membranes often exhibit rejection efficiencies exceeding 99 % for dyes, pharmaceuticals, and heavy metals while maintaining high water fluxes. Moreover, the integration of photocatalytic moieties, ionic functionalities, or nanomaterial composites further enhances their selectivity, permeability, and anti-fouling performance. This review provides a comprehensive overview of the current progress in COF-based membranes for wastewater treatment, focusing on structure–property relationships, fabrication strategies, and factors affecting separation performance. Challenges and future directions for the development of scalable and durable COF membranes for industrial applications are also discussed.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"1 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145229465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Engineering active Co-Co/Co-N sites in carbon nanotube catalyst for efficient Fenton-like removal of sulfamethoxazole 碳纳米管催化剂中Co-Co/Co-N活性位点的工程设计用于高效类芬顿去除磺胺甲恶唑
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-10-06 DOI: 10.1016/j.seppur.2025.135474
Yue Ma, Yi Chen, Minghui Sun, Xinhe Zhang, Bo Liu, Shi Zhou, Wei Jiang, Chunbo Liu
{"title":"Engineering active Co-Co/Co-N sites in carbon nanotube catalyst for efficient Fenton-like removal of sulfamethoxazole","authors":"Yue Ma, Yi Chen, Minghui Sun, Xinhe Zhang, Bo Liu, Shi Zhou, Wei Jiang, Chunbo Liu","doi":"10.1016/j.seppur.2025.135474","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.135474","url":null,"abstract":"Development highly efficient and stable carbon-loaded cobalt-based catalysts holds great significance for Fenton-like wastewater purification. The incorporation of N atoms into the carbon substrate can effectively modulate the charge distribution of the catalyst and generate multiple active sites. Herein, using ZIF-9 and melamine as precursors, Co nanoparticles encapsulated N-doped carbon nanotubes (Co@NCNT) were constructed. In Fenton-like catalysis, Co@NCNT could efficiently activate peroxymonosulfate (PMS) to produce reactive oxygen species (ROS), and completely degrade sulfamethoxazole (SMX) within 5 min. Meanwhile, the Co@NCNT/PMS system shows good resistance to inorganic anions and natural organic matter and is highly adaptable to various organic pollutants. Continuous 10 h operation of SMX degradation indicates Co@NCNT has good cycling stability and practical application potential. Mechanism analysis reveals the synergistic effect between radicals (SO<sub>4</sub><sup>•-</sup>) and non-radicals (<sup>1</sup>O<sub>2</sub>, Co(IV) = O). In addition, there are two active sites (Co-Co/Co-N) to propel PMS activation, Co<img alt=\"single bond\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\" style=\"vertical-align:middle\"/>Co bonds primarily contribute to the formation of <sup>1</sup>O<sub>2</sub>, Co(IV) = O, and SO<sub>4</sub><sup>•-</sup>, whereas Co<img alt=\"single bond\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\" style=\"vertical-align:middle\"/>N bonds generate a minor amount of <sup>1</sup>O<sub>2</sub>, minimize Co leakage, and enhance electron transfer efficiency. In summary, this work provides a strategy for the simple fabrication of catalysts with dual active sites for efficient Fenton-like catalysis.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"123 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145229463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electrochemical separation of UO22+ and Ni2+ using formed WO3 film electrode in LiCl-KCl eutectic 利用形成的WO3膜电极在LiCl-KCl共晶中分离UO22+和Ni2+
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-10-06 DOI: 10.1016/j.seppur.2025.135472
Quanxing Liu, Mei Li, Rugeng Liu, Meng Zhang, Yubao Liu, Wei Han
{"title":"Electrochemical separation of UO22+ and Ni2+ using formed WO3 film electrode in LiCl-KCl eutectic","authors":"Quanxing Liu, Mei Li, Rugeng Liu, Meng Zhang, Yubao Liu, Wei Han","doi":"10.1016/j.seppur.2025.135472","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.135472","url":null,"abstract":"To separate UO<sub>2</sub><sup>2+</sup> from the impurity element Ni<sup>2+</sup>, WO<sub>3</sub> film electrode was chosen as cathode to study the electrochemical behaviors of UO<sub>2</sub><sup>2+</sup> and Ni<sup>2+</sup>. First, WO<sub>3</sub> film was prepared at applied voltage of 25 V in NH<sub>4</sub>F-(CH<sub>2</sub>OH)<sub>2</sub> solution. The formed WO<sub>3</sub> film exhibited a porous structure and preferentially grew along the (020) crystal direction. Then, the electroreduction mechanisms of Ni<sup>2+</sup> and UO<sub>2</sub><sup>2+</sup>, as well as the kinetic properties of UO<sub>2</sub><sup>2+</sup>/UO<sub>2</sub> couple and nucleation mode of UO<sub>2</sub> were studied on WO<sub>3</sub> film electrode before and after the addition of the Ni<sup>2+</sup> using various electrochemical techniques. The electrode reactions of Ni<sup>2+</sup> and UO<sub>2</sub><sup>2+</sup> were found to be one-step two-electron transfer process and two-step one-electron transfer process, respectively. The deposition potential of UO<sub>2</sub><sup>+</sup>/UO<sub>2</sub> was found to be more negative than that of Ni<sup>2+</sup>/Ni, indicating that UO<sub>2</sub> and Ni could be co-deposited. The nucleation mode of UO<sub>2</sub> and the exchange current density(<em>j</em><sub>0</sub>) of UO<sub>2</sub><sup>2+</sup> /UO<sub>2</sub> couple were measured on formed WO<sub>3</sub> film electrode by CA and LP techniques. It was found that in the presence of Ni<sup>2+</sup>, the nucleation mode of UO<sub>2</sub> unchanged, and the value of <em>j</em><sub>0</sub> became bigger, showing that the presence of Ni<sup>2+</sup> facilitates the reduction of UO<sub>2</sub><sup>2+</sup> to UO<sub>2</sub>. The electrochemical separation was carried out on W and WO<sub>3</sub>/W film electrode through constant potential electrolysis for 1 h. The deposition products were characterized by XRD, SEM-EDS and AFM which were composed of dendritic Ni and octahedral UO<sub>2</sub> on W electrode and octahedral UO<sub>2</sub> and polyhedral Ni on WO<sub>3</sub>/W film electrode. Notably, after 6 h electrochemical separation, the obtained product was only UO<sub>2</sub>. ICP-AES analysis result indicated that as the electrolysis proceeded, the concentration of UO<sub>2</sub><sup>2+</sup> decreased, while the concentration of Ni<sup>2+</sup> first decreased and then increased, and finally returned to its initial value, showing the complete separation of Ni<sup>2+</sup> and UO<sub>2</sub><sup>2+</sup>. The separation factor (<em>SF</em>) of UO<sub>2</sub><sup>2+</sup>/Ni<sup>2+</sup> was estimated to be 240 ± 5.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"28 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145229467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multi-objective optimization of reactive extractive distillation with ionic liquid-based entrainer for sustainable separation of the Allyl Acetate-Allyl Alcohol-Water system 离子液体基夹带剂反应萃取精馏可持续分离醋酸烯丙酯-烯丙醇-水体系的多目标优化
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-10-06 DOI: 10.1016/j.seppur.2025.135438
Wenxuan Zhao, Wenna Liu, Ying Xu, Huairong Zhou, Zhaoyou Zhu, Yinglong Wang, Peizhe Cui, Guoxuan Li
{"title":"Multi-objective optimization of reactive extractive distillation with ionic liquid-based entrainer for sustainable separation of the Allyl Acetate-Allyl Alcohol-Water system","authors":"Wenxuan Zhao, Wenna Liu, Ying Xu, Huairong Zhou, Zhaoyou Zhu, Yinglong Wang, Peizhe Cui, Guoxuan Li","doi":"10.1016/j.seppur.2025.135438","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.135438","url":null,"abstract":"This study focuses on the separation problem of the allyl acetate/allyl alcohol/H<sub>2</sub>O azeotropic system. With the help of extractive distillation and reactive extractive distillation technology, the system is optimized in combination with thermodynamic analysis and process intensification strategy. Based on the COSMO-SAC model, ionic liquids entrainers are screened, and six candidate entrainers such as [PMIM] [NO<sub>3</sub>] are determined by comprehensive evaluation, and their compatibility with the intermolecular interaction energy of the system is verified by quantum chemical calculation. The multi-objective optimization algorithm is used to determine [MIM] [NO<sub>3</sub>] as the optimal entrainer. Heat-integration and heat pump-assisted heat integration technology enhanced processes are introduced. After Economy-Environment-Exergy-Energy verification, the heat pump-assisted heat integration extractive distillation process is superior to the heat-integrated assisted extractive distillation. Compared with the traditional extractive distillation process, the annual total cost is reduced by 12.66 % and gas emissions are reduced by 30.19 %. Further considering the exothermic reaction of ethylene oxide and H<sub>2</sub>O, combined with the heat integrated enhanced process, the annual total cost is reduced by 17.61 % and gas emissions are reduced by 60.38 %. It is finally determined that the heat integrated assisted reactive extractive distillation process shows significant advantages in technical economy and environmental sustainability, providing an innovative solution for the clean separation of azeotropic systems.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"8 1","pages":"135438"},"PeriodicalIF":8.6,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
What governs phosphorus adsorption on biochar-supported layered double hydroxides? A data-driven analysis of parameter interactions 是什么控制着磷在生物炭负载的层状双氧水化物上的吸附?参数相互作用的数据驱动分析
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-10-06 DOI: 10.1016/j.seppur.2025.135452
Xin Huang, Chen Li, Guixian Xie, Huiqiang Ma, Bo Wang
{"title":"What governs phosphorus adsorption on biochar-supported layered double hydroxides? A data-driven analysis of parameter interactions","authors":"Xin Huang, Chen Li, Guixian Xie, Huiqiang Ma, Bo Wang","doi":"10.1016/j.seppur.2025.135452","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.135452","url":null,"abstract":"The rational design of advanced functional materials, such as adsorbents for tackling water eutrophication, is often challenged by inconsistent experimental findings and a lack of generalizable design principles. This difficulty stems from the complex nature of these materials, where performance is dictated by the non-linear interplay of numerous synthesis and operational parameters that traditional trial-and-error methods cannot adequately resolve. This study presents a systematic explainable AI (XAI) framework to move beyond simple prediction and instead deconstruct the complex structure-performance relationships in biochar-supported layered double hydroxide composites (LDH@BC). Leveraging a 2057-point literature dataset, our high-accuracy CatBoost model (R<sup>2</sup> = 0.956) serves as a reliable foundation for this in-depth analysis. The analysis identified a set of optimal operating conditions, including a solution pH of 4–7 and an adsorbent dosage of 1.0–2.0 g·L<sup>−1</sup>. Crucially, the model also revealed a key design principle: a low LDHs/BC ratio (0–1.0), combined with sufficient adsorbent dosages, maximizes adsorption capacity by promoting optimal nanoparticle dispersion. This work provides not only specific, data-driven guidelines for the rational design of LDH@BC adsorbents but also demonstrates a transferable XAI framework for accelerating the transition from empirical screening to intelligent, data-informed design for other complex functional materials.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"75 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145229464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Upcycling biomass solid wastes into value-added N-doped biochar for enhanced VOCs adsorption 将生物质固体废物升级为增值掺氮生物炭以增强对VOCs的吸附
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-10-06 DOI: 10.1016/j.seppur.2025.135476
Qingqing Huo, Yuxin Du, Fuhang Huo, Shoujun Wang, Yubao Chen, Xingqiang Jiang, Lei Zhang, Qihong Cen, Zewei Liu, Bin Li
{"title":"Upcycling biomass solid wastes into value-added N-doped biochar for enhanced VOCs adsorption","authors":"Qingqing Huo, Yuxin Du, Fuhang Huo, Shoujun Wang, Yubao Chen, Xingqiang Jiang, Lei Zhang, Qihong Cen, Zewei Liu, Bin Li","doi":"10.1016/j.seppur.2025.135476","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.135476","url":null,"abstract":"Nitrogen (N)-doped biochar derived from biomass solid wastes exhibits remarkable potential for volatile organic compounds (VOCs) control due to its high selectivity and high adsorption efficiency. In this paper, the preparation methods of N-doped biochar through pyrolysis, gasification, and hydrothermal carbonization are comprehensively reviewed, and various physical and chemical activation methods are also introduced. After nitrogen doping, the nitrogen content of the biochar increased by up to 10.7 times, and its adsorption capacity for VOCs was enhanced correspondingly by up to 10.5 times. This review also provides a detailed discussion on the mechanism for VOCs by N-doped biochar. Hydrogen bonding, electrostatic interactions, van der Waals forces, and π-stacking are considered to be the main adsorption mechanisms. Moreover, the influences of feedstock types and nitrogen doping methods on the properties of resulting N-doped biochars are revealed. The nitrogen functional groups, total pore volume, and specific surface area of biochar are the most critical factors affecting adsorption. Notably, in-situ nitrogen doping offers a simple process with high structural nitrogen content, whereas ex-situ doping provides controllable nitrogen content and greater flexibility. In the future, the integration of machine learning with life cycle assessment can guide the development of cost-effective, high-performance, and scalable N-doped hierarchical porous biochar materials. This review benefits subsequent related research in upcycling biomass solid wastes into N-doped biochar for VOCs adsorption.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"128 1","pages":"135476"},"PeriodicalIF":8.6,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145247234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Simultaneous Ca/Li separation and Ca-based layered double hydroxide synthesis from oilfield brine for heavy metal removal in electroplating wastewater 油田卤水Ca/Li同时分离及Ca基层状双氢氧化物合成去除电镀废水中重金属
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-10-06 DOI: 10.1016/j.seppur.2025.135456
Lu Yu, Xiaomeng Liu, Rongping Yun, Min Wang, Xu Xiang
{"title":"Simultaneous Ca/Li separation and Ca-based layered double hydroxide synthesis from oilfield brine for heavy metal removal in electroplating wastewater","authors":"Lu Yu, Xiaomeng Liu, Rongping Yun, Min Wang, Xu Xiang","doi":"10.1016/j.seppur.2025.135456","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.135456","url":null,"abstract":"Oilfield brine, a by-product of oil and gas extraction, contains valuable resources such as Li<sup>+</sup>, K<sup>+</sup> and Ca<sup>2+</sup>, offering potential utilisation benefits but also presenting separation challenges. We developed a reaction-coupled separation strategy to separate Ca<sup>2+</sup> and Li<sup>+</sup> while simultaneously synthesising a calcium-based layered double hydroxide (Ca-based LDH) from the brine. This technology enables the recovery of over 90 % of Ca<sup>2+</sup> into the solid product, with 98.5 % of Li<sup>+</sup> retained in the liquid phase, achieving highly efficient separation of Ca<sup>2+</sup> and Li<sup>+</sup>. The resulting Ca-based LDH demonstrated excellent capacity for removing heavy metals, such as Cu<sup>2+</sup>, Ni<sup>2+</sup> and Zn<sup>2+</sup>, from electroplating wastewater. The removal capacities reached up to 384.2 mg/g for Cu<sup>2+</sup>, 319.3 mg/g for Ni<sup>2+</sup> and 367.9 mg/g for Zn<sup>2+</sup>. In both single-cation and mixed-cation wastewaters, metal concentrations were dramatically reduced to parts-per-billion (ppb) levels. Kinetic studies indicated rapid adsorption behaviour of Cu<sup>2+</sup>, Ni<sup>2+</sup> and Zn<sup>2+</sup> by the Ca-based LDH. Mechanistic analysis revealed that Ca<sup>2+</sup> ions in the LDH layers are isomorphously substituted by Cu<sup>2+</sup>, Ni<sup>2+</sup> and Zn<sup>2+</sup> from the solution, forming Cu-, Ni- and Zn-containing LDHs with enhanced structural stability. Additionally, the released Ca<sup>2+</sup> ions precipitate with CO₃<sup>2−</sup>, derived either from intercalated anions or carbonate in the water. Such conditions promote further substitution of Ca<sup>2+</sup> in the LDH layers by Cu<sup>2+</sup>, Ni<sup>2+</sup> and Zn<sup>2+</sup>, resulting in robust metal removal and ultralow residue concentrations in the treated wastewater. This work presents an efficient, economical and sustainable approach for the simultaneous separation and utilisation of oilfield brine resources and treatment of electroplating wastewater.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"26 1","pages":"135456"},"PeriodicalIF":8.6,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145255084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
One-step purification of crude antimony by vacuum distillation-selective condensation 真空蒸馏-选择冷凝一步提纯粗锑
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-10-05 DOI: 10.1016/j.seppur.2025.135477
Jia-xuan Li, Lei Zhang, Yan-rong Sun, Yi Zhou, Chang-bin Nan, Shi-min Qin, Xi-ping Zhou, Chong-lin Bai, Lin Zheng
{"title":"One-step purification of crude antimony by vacuum distillation-selective condensation","authors":"Jia-xuan Li, Lei Zhang, Yan-rong Sun, Yi Zhou, Chang-bin Nan, Shi-min Qin, Xi-ping Zhou, Chong-lin Bai, Lin Zheng","doi":"10.1016/j.seppur.2025.135477","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.135477","url":null,"abstract":"The traditional distillation technology typically employs a two-step distillation process to remove highly and lowly volatile impurities from antimony (Sb) metal. Based on the impurity behavior model during the vacuum distillation purification of Sb metal, a one-step technology for producing high-purity Sb metal via vacuum distillation-selective condensation has been developed. This technology was applied to prepare 4 N5(99.995 %) and 4 N(99.99 %) high-purity Sb metals at three distillation temperatures of 640 °C, 670 °C, and 700 °C. The research findings indicate that highly volatile impurities such as arsenic (As) migrate into the distillate in the upper section, while lowly volatile impurities such as bismuth (Bi), lead (Pb), copper (Cu), iron (Fe), and nickel (Ni) are enriched in the residue in the lower section. Compared with traditional distillation technology, the vacuum distillation-selective condensation method can effectively remove both highly and lowly volatile impurities. Specifically, lowly volatile impurities such as Cu, Fe, Ni, and Pb were significantly removed with removal rates exceeding 85 %, whereas the removal rates for highly volatile impurity of As and lowly volatile impurity of Bi were limited, with the lowest removal rate being approximately 50 %. The distillation temperature is preferably set at 640 °C, where the maximum product yield reaches 83.16 %. In one-step preparation, the yields of 4 N5 and 4 N high-purity Sb metals are 32 % and 51.16 %, respectively.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"23 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145229469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Valorisation of Arbutus unedo distillers' grains for topical applications: NADES extraction via conventional and pressurized techniques 杨梅蒸馏器谷物局部应用的增值:通过常规和加压技术提取NADES
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-10-05 DOI: 10.1016/j.seppur.2025.135482
Bárbara C. Jesus, João Alcobia, Beatriz Nobre, Helena Ribeiro, Joana Marto, Isabel M. Marrucho
{"title":"Valorisation of Arbutus unedo distillers' grains for topical applications: NADES extraction via conventional and pressurized techniques","authors":"Bárbara C. Jesus, João Alcobia, Beatriz Nobre, Helena Ribeiro, Joana Marto, Isabel M. Marrucho","doi":"10.1016/j.seppur.2025.135482","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.135482","url":null,"abstract":"During the production of <em>Arbutus unedo</em> (<em>A. unedo</em>) spirit, large quantities of distillers' grains are generated. These by-products are rich in phenolic compounds (PCs), a family of molecules well known for their antioxidant activity. This study investigates the valorisation of this waste stream by extracting bioactive compounds to produce antioxidant rich extracts for direct incorporation into cosmetic formulations.Maceration and pressurized liquid extraction (PLE) were selected as extraction techniques, using natural deep eutectic solvents (NADES) as extractants. The obtained extracts were evaluated for total phenolic content (TPC), total flavonoid content (TFC), and antioxidant activity (AA). Screening experiments revealed that NADES outperformed conventional solvents (water and aqueous ethanol mixtures), with Proline:Propylene Glycol (1:4) containing 65 mol% water yielding the best results. Response surface methodology (RSM) was then applied to optimize AA in maceration by varying extraction temperature, NADES ratio, and water content. The extract with the highest AA was obtained using Pro:PPG with a proline molar fraction of 0.41, 14 mol% water, at 58 °C, and 30 min extraction time. PLE further improved AA compared to the optimized maceration results, using Pro:PPG (1:4) with 65 mol% water at 75 °C, 1500 psi, and two extraction cycles of 15 min each.The optimized extracts from both maceration and PLE were incorporated into cosmetic formulations, and their rheological properties were characterized. This work represents the first study to explore the use of <em>A. unedo</em> distillers' grain extracts in cosmetics.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"197 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145226717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Innovations in PFAS remediation: a review on the growing role of cold plasma technology PFAS修复技术的创新:冷等离子体技术日益重要的作用综述
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-10-05 DOI: 10.1016/j.seppur.2025.135535
Christos A. Aggelopoulos
{"title":"Innovations in PFAS remediation: a review on the growing role of cold plasma technology","authors":"Christos A. Aggelopoulos","doi":"10.1016/j.seppur.2025.135535","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.135535","url":null,"abstract":"<em>Per</em>- and polyfluoroalkyl substances (PFAS) are a class of highly persistent and bioaccumulative environmental contaminants that have raised global concern due to their mobility, toxicity, and resistance to degradation. Conventional treatment technologies often fall short in achieving sufficiently high levels of destruction, particularly in complex matrices such as groundwater, wastewater, or soil. In this context, cold plasma technology has emerged as a promising, chemical-free approach for the effective and energy-efficient degradation of PFAS. Cold plasma produces a rich mixture of oxidative and reductive species, electrons, UV photons, and electric fields, capable of breaking down the strong carbon‑fluorine bonds characteristic of PFAS compounds. This critical review provides a comprehensive assessment of recent research efforts on the application of cold plasma for PFAS remediation from aqueous and solid-phase environments. It systematically examines the influence of plasma types and reactor configurations, along with working gases, water matrices, plasma electrical parameters, and treatment conditions on degradation efficiency. Key factors such as plasma chemistry, energy consumption, pH, treatment duration, and PFAS structure are analyzed in detail. The review also addresses mechanistic insights, degradation pathways, and the main challenges for scaling cold plasma systems for real-world applications, including energy demand and integration with existing infrastructure. By critically synthesizing current findings, this review highlights the growing role of cold plasma in PFAS destruction and identifies research gaps and technological directions necessary to advance its practical deployment in environmental remediation.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"53 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145229468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信