Separation and Purification Technology最新文献

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Novel calcite-enriched material derived from fly ash for efficient and selective phosphate removal from wastewater
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-03-06 DOI: 10.1016/j.seppur.2025.132401
Shanshan Zhang, Jirong Lan, Tianyu Zeng, Min Zhou, Haobo Hou
{"title":"Novel calcite-enriched material derived from fly ash for efficient and selective phosphate removal from wastewater","authors":"Shanshan Zhang, Jirong Lan, Tianyu Zeng, Min Zhou, Haobo Hou","doi":"10.1016/j.seppur.2025.132401","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.132401","url":null,"abstract":"Efficient and selective advanced phosphorus treatment from wastewater remains a significant challenge. In this study, we developed a novel calcite-enriched material (M-Res) for advanced phosphorus recovery from wastewater. This material was synthesized from high-aluminum fly ash through calcination, Na<sub>2</sub>CO<sub>3</sub> leaching, and ball-milling modification. Characterization results indicated that ball-milling introduced lattice defects, creating abundant active calcium sites with a strong affinity for capturing phosphate ions. Batch adsorption experiments demonstrated that M-Res has a high phosphate adsorption capacity of 74.8 mg-P/g and exhibits excellent performance in terms of anti-interference and selective adsorption. When the initial concentration was 10 mg/L, the post-adsorption phosphate concentration met the first-level surface water quality standards (0.02 mg/L, GB 3838-2002). At 50 mg/L, it met the second-level discharge standards for urban sewage treatment plants (3 mg/L, GB 18918-2002). The adsorption mechanism involves the release of Ca<sup>2+</sup> from calcite, which interacts with phosphate ions through complexation, surface precipitation, and electrostatic attraction. Derived from a by-product of high-aluminum fly ash in aluminum extraction processes, M-Res is economical and simple to produce, making it a promising adsorbent for the advanced treatment of low-concentration phosphate.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"34 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143560692","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
Novel β-FeOOH@ABS membranes with extremely high permeability fabricated by 3D printing and in situ mineralization for oil–water separation
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-03-06 DOI: 10.1016/j.seppur.2025.132402
Jing Ma, Hongjun Lin, Wei Yu, Cheng Chen, Qianqian Zeng, Siyuan Chen, Xuezheng Huang, Leihong Zhao, Liguo Shen
{"title":"Novel β-FeOOH@ABS membranes with extremely high permeability fabricated by 3D printing and in situ mineralization for oil–water separation","authors":"Jing Ma, Hongjun Lin, Wei Yu, Cheng Chen, Qianqian Zeng, Siyuan Chen, Xuezheng Huang, Leihong Zhao, Liguo Shen","doi":"10.1016/j.seppur.2025.132402","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.132402","url":null,"abstract":"Lately, frequent offshore oil spills and the limitations of traditional oil–water separation membranes in balancing selectivity and permeability have driven the development of innovative membrane technologies for the efficient treatment of oily wastewater. In this study, a durable and recyclable Acrylonitrile–Butadiene–Styrene (ABS) membrane was fabricated using 3D printing, subsequently sulfonated via radiation-induced grafting, and further modified with <em>in situ</em> mineralization to prepare β-FeOOH@ABS membrane. The β-FeOOH@ABS membrane exhibited excellent hydrophilicity and oleophobicity compared to bare hydrophobic ABS membrane, with a water contact angle of 16° and an underwater oil contact angle of 162°. Under gravity-driven conditions, the β-FeOOH@ABS membrane achieved a separation efficiency exceeding 99.78 % across five different oil–water mixtures, along with an exceptionally high flux of 2.93 × 10<sup>5</sup> L·m<sup>-2</sup>·h<sup>-1</sup>, attributed to stable hydration layer formed via β-FeOOH nanorods. Combined 100 cycles durability tests and XDLVO theoretical analysis, it was found that the β-FeOOH@ABS membrane showed excellent long-term stability and anti-fouling performance with high flux recovery of 99.41 % and separation efficiency of 99.83 %, originating from its enhanced fouling resistance. The photocatalytic property of β-FeOOH nanorods also endowed the β-FeOOH@ABS membrane with superior catalytic performance. This work underscores the significant potential of novel β-FeOOH@ABS membranes for advanced oil–water separation applications.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"12 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143560698","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
Activation of peroxydisulfate by alkali-activated algal biochar for the enhancement of enrofloxacin degradation in water: Role of singlet oxygen and electron transfer pathway
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-03-06 DOI: 10.1016/j.seppur.2025.132396
Qiang Kuai, Yixin Wang, Jingjing Yang, Tianyin Huang, Ying-Hong Guan, Zheng-Qian Liu, Jun Ma
{"title":"Activation of peroxydisulfate by alkali-activated algal biochar for the enhancement of enrofloxacin degradation in water: Role of singlet oxygen and electron transfer pathway","authors":"Qiang Kuai, Yixin Wang, Jingjing Yang, Tianyin Huang, Ying-Hong Guan, Zheng-Qian Liu, Jun Ma","doi":"10.1016/j.seppur.2025.132396","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.132396","url":null,"abstract":"The biochar has garnered significant attention for its potential in carbon sink and versatile application, such as catalyst. However, the catalytic mechanism for peroxydisufate (PDS) activation by alkali-activated biochar is not yet clear. In this work, algal biochar (BC) was synthesized using a simple one-step pyrolysis method and used as a metal-free catalyst to activate PDS. The efficacy of the BC/PDS system for the degradation of enrofloxacin (ENR) was systematically studied. The optimal conditions for BC preparation were identified as a pyrolysis temperature of 650°C and a ratio of NaOH: algae biomass ratio as 2:1 (650NBC), resulting in a biochar with a large surface area, high defect density, more carbonyl group (C<img alt=\"double bond\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/dbnd.gif\" style=\"vertical-align:middle\"/>O) and excellent electron transfer capabilities. Mechanistic studies using electron paramagnetic resonance (EPR), quenching experiments, and electrochemical analysis showed that both radical and non-radical pathways were involved in ENR degradation. Notably, singlet oxygen (<sup>1</sup>O<sub>2</sub>) and electron transfer pathway (ETP) play crucial roles in the degradation of ENR molecules. The alkali-activated biochar accelerated the electron transfer between PDS and ENR by increasing the electrochemical specific surface area and facilitating the formation of a metastable 650NBC-PDS* complex. Through characterization analysis, the significantly increased C<img alt=\"double bond\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/dbnd.gif\" style=\"vertical-align:middle\"/>O groups and defect sites provide more active sites for <sup>1</sup>O<sub>2</sub> generation. Moreover, the intermediate degradation products of ENR from mass spectrometry indicated a possible pathway through the density functional theory (DFT) method. Overall, our study enhances the understanding of the mechanism in PDS activation by alkali-activated biochar, and proposes a novel approach for the recycling of solid waste.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"44 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143560654","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
Prediction of the solubility of fluorinated gases in ionic liquids by machine learning with COSMO-RS-based descriptors
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-03-06 DOI: 10.1016/j.seppur.2025.132413
Yuxuan Fu, Wenbo Mu, Xuefeng Bai, Xin Zhang, Chengna Dai, Biaohua Chen, Gangqiang Yu
{"title":"Prediction of the solubility of fluorinated gases in ionic liquids by machine learning with COSMO-RS-based descriptors","authors":"Yuxuan Fu, Wenbo Mu, Xuefeng Bai, Xin Zhang, Chengna Dai, Biaohua Chen, Gangqiang Yu","doi":"10.1016/j.seppur.2025.132413","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.132413","url":null,"abstract":"The substantial emission of fluorinated gases (F-gases) has exacerbated global climate change. Ionic liquids (ILs) are a type of promising green solvents for capturing F-gases. For efficient screening of IL candidates, this study proposed two machine learning (ML) models multilayer perceptron (MLP) and support vector regression (SVR) based on the critical descriptors from the thermodynamic model COSMO-RS to predict the solubility of F-gases in ILs for the first time. Over 4000 experimental solubility data (25F-gases and 52 ILs) collected were utilized to build the dataset. The used COSMO-RS-based descriptors consist of distribution of surface shielding charge density (<em>σ-profiles</em>) of ILs and F-gases, molecular surface area and molecular volume of anions, cations and F-gases. In addition, the input descriptors include temperature (T), pressure (P) and molecular weight of anions, cations and F-gases. The results indicate that MLP exhibits the better prediction capability compared to SVR, with the average absolute relative deviation (AARD) of 10.16% and coefficient of determination (R<sup>2</sup>) of 0.9956, respectively. The generalization performance of the MLP model was successfully evaluated by predicting the solubility data of F-gas <em>trans</em>-1,3,3,3-tetrafluoropropene (R1234ze(E)), which are not been learned, with an average AARD of 14.28%. This demonstrates that the developed MLP possesses strong generalization ability, and provide a reliable reference for the screening task-specific ILs for high-efficiency capture of F-gases","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"16 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143560696","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
Effects of the co-existence of humic acid on the defluorination/desalination treatment of brackish groundwater in a hybrid capacitive deionizing membrane distillation (CDIMD) system
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-03-06 DOI: 10.1016/j.seppur.2025.132403
Chang Liu, Zhenghao Ni, Jinghong Liu, Jiayun Shen, Liang Zhu, Mei Pan, Wenlan Yang
{"title":"Effects of the co-existence of humic acid on the defluorination/desalination treatment of brackish groundwater in a hybrid capacitive deionizing membrane distillation (CDIMD) system","authors":"Chang Liu, Zhenghao Ni, Jinghong Liu, Jiayun Shen, Liang Zhu, Mei Pan, Wenlan Yang","doi":"10.1016/j.seppur.2025.132403","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.132403","url":null,"abstract":"A hybrid capacitive deionizing membrane distillation (CDIMD) technique was established in this work for the simultaneous drinking water production from fluoride-rich brackish groundwater and membrane fouling control, especially emphasizing the influencing mechanism of the coexistence of natural organic matter (NOMs) like humic acid (HA). The experimental results confirmed the superiority of CDIMD process in the purification of fluoride-rich brackish groundwater considering its outstanding decontamination efficiencies for saline ions (93.3 %-100 %), F<sup>-</sup> (99.7 %-100 %), and HA (99 %-100 %). Besides the positive impacts on the effluent quality of CDIMD, the coexistence of HA also contributed to the membrane fouling mitigation in the CDIMD system, which remarkably alleviated the flux drop from 75 % (168 h, 0 mg/L HA) to 29 % (168 h, 100 mg/L HA). The content of coexisted HA obviously affected the interactions between HA and Ca<sup>2+</sup> in the CDIMD system, consequently influencing the fouling control of CDIMD. For the lower HA concentration, the previously formed HA-Ca<sup>2+</sup> chelates would be disintegrated in the electric field circumstance of CDIMD considering the weaker chelation force than the electro-adsorption force, which was adverse to the membrane scaling control. Under the higher HA concentration, the reticular HA-Ca<sup>2+</sup> chelates stably existing in the CDIMD system efficiently captured metal cations like Ca<sup>2+</sup> and anions like F<sup>-</sup> from feed solutions via the chelation and adsorption mechanisms, promoting the membrane scaling control performance of CDIMD. The new-type CDIMD replacing MD in the fluoride-rich brackish groundwater treatment efficiently settled the membrane fouling issue of MD under the premise of ensuring effluent quality, and the coexistence of HA in feed solution posed positive impacts on the CDIMD operation. The experiment provided reliable suggestions for the feed pretreatment, and a proper HA coexistence contributed to the CDIMD performance.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"24 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143560697","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
Isolation and purification of solanesol from post-distillation residue of burley tobacco leaves by countercurrent separation methods
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-03-05 DOI: 10.1016/j.seppur.2025.132398
Agnieszka Dębczak, Katja Lehnert, Vanessa Bauer, Rosalie Ormo, Felix Rüttler, Walter Vetter
{"title":"Isolation and purification of solanesol from post-distillation residue of burley tobacco leaves by countercurrent separation methods","authors":"Agnieszka Dębczak, Katja Lehnert, Vanessa Bauer, Rosalie Ormo, Felix Rüttler, Walter Vetter","doi":"10.1016/j.seppur.2025.132398","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.132398","url":null,"abstract":"Natural solanesol with nine all-<em>trans</em>-configured isoprene units is a member of the family of polyprenols which mainly occurs in plants of the nightshade family (Solanaceae) such as tomato and especially tobacco (<em>Nicotiana tabacum</em>). Solanesol is valued for its antioxidant properties and is widely used in the pharmaceutical industry as an intermediate for the synthesis of ubiquinone medicines including coenzyme Q10 and vitamin K2. However, obtaining solanesol with a high purity from natural sources is still a challenge. For this reason, a multistep procedure for preparing highly purified solanesol from tobacco leaves was developed based on (i) supercritical fluid extraction (SFE) and (ii) molecular distillation (MD), followed by (iii) centrifugal partition chromatography (CPC) and (iv) countercurrent chromatography (CCC). Using this approach, the purity of solanesol was stepwise increased from 15.4 % after SFE and MD to 20 % after CPC and 79 % and 86 % in two CCC fractions. A final purification step by silica gel column chromatography with 28.5 mg in the combined CCC fractions provided 12.7 mg of 99 % solanesol according to HPLC-PDA, LC-APCI-MS/MS, and <sup>1</sup>H NMR, which was also used for confirmation of the structure.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"53 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143560701","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
Fe-Co bimetallic sulfides in-situ loading onto g-C3N4 with abundant nitrogen vacancies for peroxymonosulfate activation: Efficient atrazine degradation and radical/non-radical mechanisms
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-03-05 DOI: 10.1016/j.seppur.2025.132367
Yin Wei, Tianyi Wang, Yansong Wang, Haonan Chen, Benchuan Cao, Cheng Han, Jiao Yang, Zhongquan He, Chuanliang Zhao, Liwei Yang
{"title":"Fe-Co bimetallic sulfides in-situ loading onto g-C3N4 with abundant nitrogen vacancies for peroxymonosulfate activation: Efficient atrazine degradation and radical/non-radical mechanisms","authors":"Yin Wei, Tianyi Wang, Yansong Wang, Haonan Chen, Benchuan Cao, Cheng Han, Jiao Yang, Zhongquan He, Chuanliang Zhao, Liwei Yang","doi":"10.1016/j.seppur.2025.132367","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.132367","url":null,"abstract":"Graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) offers advantages such as tunable electronic structure, rich pyridinic-N content, low cost and environmental benignity, yet its intrinsic catalytic capacity for peroxymonosulfate (PMS) activation remains limited. Herein, we proposed a novel catalyst by in-situ loading Fe-Co bimetallic sulfides onto g-C<sub>3</sub>N<sub>4</sub> (Fe<sub>1</sub>Co<sub>1</sub>@SCN) through a simple one-step pyrolysis method. Beyond the synergistic effect between the Fe-Co bimetallic sulfides, abundant nitrogen vacancies (NVs) were introduced to promote electron transfer through charge redistribution and facilitate the redox cycle of Fe-Co, driving PMS activation to generate HO<strong><sup>•</sup></strong> as the primary reactive species. Through UHPLC-MS analysis and density functional theory (DFT) calculations, degradation pathways for ATZ were elucidated. Toxicity predictions, supported by mung bean hydroponics experiments, revealed a significant detoxification capability of the system. Moreover, Fe<sub>1</sub>Co<sub>1</sub>@SCN was integrated into a catalytic membrane reactor, maintaining over 97.6 % ATZ removal during continuous purification. This study offers valuable insights into the rational design of bimetallic catalysts for environmental remediation and underscores the potential of advanced oxidation processes in effectively degrading refractory organic contaminants.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"10 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143575357","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
Size-Dependent rare earth extraction: Computational decoding of phosphorylcarboxylic acid complexes and 4f5d6s electron chemical bonding
IF 8.6 1区 工程技术
Separation and Purification Technology Pub Date : 2025-03-05 DOI: 10.1016/j.seppur.2025.132395
Xuyi Zhang, Xun Zhang, Bicheng Deng, Song Qi, Haitao Wang, Wenqi Du, Shengting Kuang, Xiaojuan Liu, Wuping Liao
{"title":"Size-Dependent rare earth extraction: Computational decoding of phosphorylcarboxylic acid complexes and 4f5d6s electron chemical bonding","authors":"Xuyi Zhang, Xun Zhang, Bicheng Deng, Song Qi, Haitao Wang, Wenqi Du, Shengting Kuang, Xiaojuan Liu, Wuping Liao","doi":"10.1016/j.seppur.2025.132395","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.132395","url":null,"abstract":"To improve extraction and separation efficiency, it is critical to clarify the relationship between the extraction structure and the performance of extractants. Since experimental systems are unable to obtain single-crystal structures, quantum-chemical approaches play a pivotal role in elucidating structure–activity relationships. Additionally, exploring the diverse extraction behaviors of rare earth elements (REE) is essential for understanding the extractant compounds with multiple functional groups. In this study, we employed first-principles calculations, using a simplified carbon-chain phosphorylcarboxylic acid (PPA) as the model extractant, to construct mononuclear complexes with diverse coordination modes. Our results indicate that the extraction structure is size-induced, leading to distinct dominant coordination modes across the rare earth series. Additionally, we found that the coordination numbers of rare earth elements decrease as their ionic radii diminish. Specifically, the coordination numbers are eight for La-Nd, seven for Pm-Lu, and six for Y, respectively. Furthermore, the variations in coordination behavior across the rare earth series are attributed to the differing degrees of carboxyl group involvement in bonding interactions for each element. Under the same coordination modes, the differences in bonding strength between the rare earth elements and the extraction ligands are identified as the primary factor facilitating rare earth separation. Therefore, variations in the sizes of rare earth series not only influence the coordination structures but also lead to bonding disparities. By investigating the rare earth series from both size and bonding perspectives, this study significantly advances the establishment of a correlation between coordination structure and extraction performance. Moreover, it provides essential guidance for a comprehensive understanding of rare earth extraction and coordination chemistry.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"212 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143560700","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
Ionic liquids as extractants in extractive distillation: A review of advances in screening methods and their mechanisms of action
IF 8.1 1区 工程技术
Separation and Purification Technology Pub Date : 2025-03-04 DOI: 10.1016/j.seppur.2025.132372
Jiqing Rao, Xin Tian, Honghai Wang, Jiapeng Liu, Chunli Li
{"title":"Ionic liquids as extractants in extractive distillation: A review of advances in screening methods and their mechanisms of action","authors":"Jiqing Rao,&nbsp;Xin Tian,&nbsp;Honghai Wang,&nbsp;Jiapeng Liu,&nbsp;Chunli Li","doi":"10.1016/j.seppur.2025.132372","DOIUrl":"10.1016/j.seppur.2025.132372","url":null,"abstract":"<div><div>Extractive distillation (ED), in which the selection of the extractant is particularly important, is a common method for separating azeotropic mixtures. Ionic liquids (ILs) have been used as extractants in ED processes owing to their low melting point, stable physical and chemical properties, and non-volatilization. These advantages improve the efficiency and performance of azeotrope separation by ED and have wide application prospects. In this review, the types of extractants used in ED are described, and screening methods, including experimental and model prediction methods, for ILs as extractants are introduced. The separation mechanisms of the extractants are discussed with respect to typical polar–polar, polar–nonpolar, and nonpolar–nonpolar azeotropic systems. Furthermore, several outlooks are presented regarding the preparation of novel ILs and their screening and mechanisms of action. This review provides new insights into and research directions for using ILs as extractants in ED.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"364 ","pages":"Article 132372"},"PeriodicalIF":8.1,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143538374","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
Oxygen vacancies induced capture effect for enhancing peracetic acid activation and selective high-valent cobalt-oxo species formation
IF 8.1 1区 工程技术
Separation and Purification Technology Pub Date : 2025-03-04 DOI: 10.1016/j.seppur.2025.132366
Xiaorui Wang, Banghai Liu, Mengsi Wu, Zengshuai Zhang, Kunlun Yang, Hengfeng Miao
{"title":"Oxygen vacancies induced capture effect for enhancing peracetic acid activation and selective high-valent cobalt-oxo species formation","authors":"Xiaorui Wang,&nbsp;Banghai Liu,&nbsp;Mengsi Wu,&nbsp;Zengshuai Zhang,&nbsp;Kunlun Yang,&nbsp;Hengfeng Miao","doi":"10.1016/j.seppur.2025.132366","DOIUrl":"10.1016/j.seppur.2025.132366","url":null,"abstract":"<div><div>High-valent cobalt-oxo species (Co<sup>IV</sup>=O) is being increasingly investigated due to its anti-interference properties and selective degradability; however, overcoming the high occupancy of the Co <em>3d</em>-orbitals to selectively form Co<sup>IV</sup>=O remains a challenge. Herein, oxygen vacancies (OVs) were engineered on the surface of Co<sub>3</sub>O<sub>4</sub> (OV-Co) via an acid etching strategy to enhance the activation of peracetic acid (PAA). The OV-Co-8/PAA system achieved complete degradation of sulfamethoxazole (SMX) within 60 min, with a <em>k</em><sub>obs</sub> value (0.07612 min<sup>−1</sup>) 7 times higher than that of the pristine Co<sub>3</sub>O<sub>4</sub> (CK-Co)/PAA system (0.01082 min<sup>−1</sup>). Methyl phenyl sulfoxide (PMSO), used as a molecular probe, confirmed the OV-induced formation of Co<sup>IV</sup>=O, which dominated the degradation process in the OV-Co-8/PAA system. Situ Raman spectroscopy and theory calculations indicated that OVs can induce the cleavage of the O–O bond in PAA adsorbed at Co sites through a capture effect, resulting in the co-coordination at Co sites (CH<sub>3</sub>CO<sub>2</sub>-Co-OH). Such co-coordination facilitated electron transfer from the Co sites via the Co <em>d<sub>z2</sub></em>–O <em>p<sub>z</sub></em> channel (CH<sub>3</sub>CO<sub>2</sub>-Co), stabilizing the previously unfavorable Co–O anti-bonding orbitals and promoting Co<sup>IV</sup>=O formation. From a thermodynamic perspectives, OVs reduce the energy required for CH<sub>3</sub>CO<sub>2</sub> release and facilitate the transfer of H through a proton-coupled electron transfer (PCET) pathway. Additionally, OV-Co-8 was loaded onto a carbon-felt membrane for water purification, achieving continuous SMX degradation with low cobalt leaching. This study advances the understanding of the molecular-level mechanism of surface defects in PAA activation and guides the rational design of efficient environmental catalysts.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"364 ","pages":"Article 132366"},"PeriodicalIF":8.1,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143538377","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
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