Separation and Purification Technology最新文献_第8页

Modulation of polymorphic structure of Ag/Ce–MOFs materials and its adsorption mechanism of Minocycline in water

IF 8.1 1区工程技术

Separation and Purification Technology Pub Date : 2025-04-02 DOI: 10.1016/j.seppur.2025.132832

Lei Zhang, Tian Ai, Nan Zhang

{"title":"Modulation of polymorphic structure of Ag/Ce–MOFs materials and its adsorption mechanism of Minocycline in water","authors":"Lei Zhang, Tian Ai, Nan Zhang","doi":"10.1016/j.seppur.2025.132832","DOIUrl":"10.1016/j.seppur.2025.132832","url":null,"abstract":"<div><div>Minocycline (MNC), as a second-generation semi-synthetic derivative of tetracycline, poses a potential carcinogenic threat to organisms in water, therefore high efficient removal of MNC is becoming a crucial key for water quality safety. This study has been successfully synthesized Ag/Ce bimetallic–doped MOF materials with diverse morphological characteristics by using microwave digestion and solvothermal methods, and it was demonstrated a significant adsorption potential in MNC from aqueous solutions. The characterization results were revealed that Ce exhibits oxygen vacancy enrichment as the central metal in MOFs, while Ag was distributed on carbon framework in the form of Ag<sup>0</sup> NPs, both of morphological features were provided more active sites for adsorption. The Ag/Ce–MOFs was achieved 98.26 % exceptional MNC adsorption efficiency at pH 9, which was followed a multilayer exothermic chemisorption mechanism. The results were shown that the maximum adsorption capacity of Ag/Ce-MOFs was 476.2 mg/g in Langmuir model, which was much more substantially surpassed than Ce–MOFs. In addition, the adsorption process was primarily mediated through hydrogen bonding, ligand interactions and amidation reactions. Furthermore, the Ag/Ce–MOFs exhibited the excellent regeneration performance and broad applicability, which was shown remarkable adsorption potential in removing various other pharmaceutical contaminants in water. In summarization, the synthesized Ag/Ce–MOFs by microwave digestion and solvothermal technology, were demonstrated the board promising prospects in efficient MNC removal in water treatment applications.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"366 ","pages":"Article 132832"},"PeriodicalIF":8.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143767028","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

Techno-economic analysis of novel lignin extraction from black liquor

IF 8.1 1区工程技术

Separation and Purification Technology Pub Date : 2025-04-02 DOI: 10.1016/j.seppur.2025.132757

Phoenix S. Tiller , Byeong Cheol Min , Hyun Khyun Ahn , Edgar Carrejo , John Sanders , David Cruz Rios , Sunkyu Park

{"title":"Techno-economic analysis of novel lignin extraction from black liquor","authors":"Phoenix S. Tiller , Byeong Cheol Min , Hyun Khyun Ahn , Edgar Carrejo , John Sanders , David Cruz Rios , Sunkyu Park","doi":"10.1016/j.seppur.2025.132757","DOIUrl":"10.1016/j.seppur.2025.132757","url":null,"abstract":"<div><div>Black liquor in a pulp mill is rich in lignin which is typically combusted during the kraft chemical recovery process in a kraft recovery boiler. Lignin valorization technologies such as LignoBoost have been developed which use carbon dioxide to recover lignin from black liquor. Lignin valorization may provide a platform chemical for sustainable fuels. The current work examines sodium bisulfate, a common spent acid from pulp mill bleaching operations, as an in-house alternative for pulp mills to precipitate lignin for valorization. Laboratory scale experimentation demonstrated that sodium bisulfate may substitute carbon dioxide in yielding lignin from black liquor. Empirical results informed a process simulation which demonstrated large-scale technical feasibility. For a bleaching mill producing 1,000 metric tons bleached pulp per day mill to produce 140 metric tons of lignin per day, the operational loads increase 2.3 metric tons/hour natural gas and consumption of all sodium bisulfate generated in bleaching are major process consequences. Techno-economic analysis yielded a minimum selling price of $426/ton of lignin when carbon dioxide was used and a minimum selling price of $398/ton of lignin when recycling bleaching spent acid was used. Sensitivity analysis revealed that lignin production and bisulfate usage as drivers for economic performance.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"366 ","pages":"Article 132757"},"PeriodicalIF":8.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143767031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rapid reduction of chloramphenicol by sodium bicarbonate-activated biochar loaded with nano zero-valent iron: Influence of pyrolysis parameters and the key role of graphitic carbon structure 碳酸氢钠活化生物炭负载纳米零价铁对氯霉素的快速还原：热解参数的影响和石墨碳结构的关键作用

IF 8.1 1区工程技术

Separation and Purification Technology Pub Date : 2025-04-02 DOI: 10.1016/j.seppur.2025.132826

Xiting Li, Haoran Dong, Shuangjie Xiao, Junmin Deng, Mengxi Zhao, Siqi Zhang, Chang Zhang, Xing Li

{"title":"Rapid reduction of chloramphenicol by sodium bicarbonate-activated biochar loaded with nano zero-valent iron: Influence of pyrolysis parameters and the key role of graphitic carbon structure","authors":"Xiting Li, Haoran Dong, Shuangjie Xiao, Junmin Deng, Mengxi Zhao, Siqi Zhang, Chang Zhang, Xing Li","doi":"10.1016/j.seppur.2025.132826","DOIUrl":"10.1016/j.seppur.2025.132826","url":null,"abstract":"<div><div>In this study, sodium bicarbonate (NaHCO<sub>3</sub>)-modified biochar (mBC) obtained at a modification ratio of 2:1 was used to load nano zero-valent iron (nZVI) for the removal of chloramphenicol (CAP). nZVI@mBC removed 98.7% of CAP within 60 min, much higher than naked nZVI (45.0%) and unmodified biochar-loaded nZVI (nZVI@BC) (50.7%). The effects of pyrolysis parameters (modification ratio (m[NaHCO<sub>3</sub>]/m[biomass]), pyrolysis temperature, heating rate, and holding time) on the ability of biochar to load nZVI were systematically investigated. The results showed that the modification ratio and pyrolysis temperature had a large influence on the loading property of mBC. The mechanism of nZVI@mBC for efficient CAP removal was explored. NaHCO<sub>3</sub>-modification promoted the formation of pore and graphite structures of biochar, and facilitated the uniform loading of nZVI. Electrochemical analysis showed that nZVI@mBC reduced CAP by direct electron transfer pathway (DET). The key graphitic carbon structure of mBC promoted the formation of iron-carbon galvanic cell, which favored electron transfer and led to better decontamination performance of nZVI@mBC. In addition, nitro reduction and dechlorination were identified as the main pathways for CAP degradation. Finally, the performance of nZVI@mBC for CAP removal in complex environments was explored to determine its environmental suitability. This study comprehensively analyzed the effects of different pyrolysis conditions on the loading capacity of modified biochar, and also elucidated the key graphitic structure of modified biochar to promote pollutant removal, which can provide a reference for the structural design of biochar-based carriers.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"366 ","pages":"Article 132826"},"PeriodicalIF":8.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758300","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

Double-defence design for super-antifouling membranes in emulsion separation

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-04-02 DOI: 10.1016/j.seppur.2025.132851

Dharmveer Yadav, Triparna Chakraborty, Amita Bedar, Sumit Saxena, Shobha Shukla

{"title":"Double-defence design for super-antifouling membranes in emulsion separation","authors":"Dharmveer Yadav, Triparna Chakraborty, Amita Bedar, Sumit Saxena, Shobha Shukla","doi":"10.1016/j.seppur.2025.132851","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.132851","url":null,"abstract":"The development of super-antifouling membranes is paramount for efficient and sustainable emulsion separation in various industrial applications. This study presents a double-defence design strategy aimed at enhancing the antifouling properties of membranes used in emulsion separation processes. The primary defence mechanism involves the integration of waste-derived oxidized graphene into polysulfone, which significantly enhances flux and antifouling properties. The inclusion of oxidized graphene within the polysulfone membrane resulted in 1.3-fold increase in hydrophilicity with water contact angle of 61 ± 2° and 1.6-fold improvement in separation efficiency. The secondary defence employs a layer of graphene-based foam at the top of the membrane, designed to manage sudden loadings and serve as a protective barrier for the membrane surface. This dual-defence configuration has resulted in 3.7-fold reduction in fouling even after the 10th cycle, ensuring prolonged membrane lifespan and consistent separation performance. The effectiveness of this double-defence design is evidenced by its superior antifouling performance and efficient resource recovery from graphene-based foam in crude and motor oil emulsions. This innovative approach paves the way for the development of next-generation antifouling membranes, offering a robust solution to the long-lasting challenge of membrane fouling.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"73 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143767029","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 removal of aniline and Sb(V) from wastewater in an integrated electrocoagulation and electro-Fenton system

IF 8.1 1区工程技术

Separation and Purification Technology Pub Date : 2025-04-02 DOI: 10.1016/j.seppur.2025.132827

Yaxiong Zeng, Wenxiang Liu, Xueni Huang, Xiaotian Yang, Beimeng Qi, Jie Yu, Hailu Fu

{"title":"Simultaneous removal of aniline and Sb(V) from wastewater in an integrated electrocoagulation and electro-Fenton system","authors":"Yaxiong Zeng, Wenxiang Liu, Xueni Huang, Xiaotian Yang, Beimeng Qi, Jie Yu, Hailu Fu","doi":"10.1016/j.seppur.2025.132827","DOIUrl":"10.1016/j.seppur.2025.132827","url":null,"abstract":"<div><div>Heavy metal–organic compound complexes are commonly found in textile dye wastewater, seriously threatening human health. This work proposes a unique integrated electrocoagulation and electro-Fenton (EC-EF) system combining an Fe anode and a carbon-felt-loaded hydroxylated carbon nanotubes (CNTs-OH/CF) cathode for the simultaneous removal of aniline and Sb(V) from wastewater. Under optimal conditions of initial pH of 3.0, NaCl concentration of 0.15 mol/L, and current density of 30 A m<sup>−2</sup>, the EC-EF system removed almost 100 % of aniline in 40 min and of Sb(V) in 10 min, with an energy consumption equal to 2.01 KWh kg<sup>−1</sup>. The excellent performance derived from the usage of the CNTs-OH/CF cathode increased the number of active sites, hydrophobicity, and electrical conductivity, facilitating the oxygen reduction reaction and electron transfer, thus enhancing the in situ-produced hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) with a concentration of 644.53 mg L<sup>−1</sup>, exceeding most reported values. Furthermore, hydroxyl radicals (•OH), the dominant active species generated through the reactions of Fe<sup>2+</sup> with electro generated H<sub>2</sub>O<sub>2</sub>, promoted the degradation of aniline. Meanwhile, Sb(V) was adsorbed by the ferric hydroxide formed at the anode and finally co-precipitated. The excellent reusability after five cycles and outstanding catalytic activity towards real wastewater demonstrate the superiority of the developed system for treating wastewater in practical applications. This study presents a unique integrated technology and a theoretical foundation for the simultaneous removal of heavy metal–organic compound complexes from wastewater.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"366 ","pages":"Article 132827"},"PeriodicalIF":8.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758301","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

Interfacially Polymerized zwitterionic Thin-Film composite membranes with AEPBS for enhanced pervaporation performance in alcohol dehydration

IF 8.1 1区工程技术

Separation and Purification Technology Pub Date : 2025-04-02 DOI: 10.1016/j.seppur.2025.132807

Joaquin Paolo V. Alcantara , Marwin R. Gallardo , Jeremiah C. Millare , Blessie A. Basilia , Chi-Lan Li , Hui-An Tsai , Shu-Hsien Huang , Kueir-Rarn Lee

{"title":"Interfacially Polymerized zwitterionic Thin-Film composite membranes with AEPBS for enhanced pervaporation performance in alcohol dehydration","authors":"Joaquin Paolo V. Alcantara , Marwin R. Gallardo , Jeremiah C. Millare , Blessie A. Basilia , Chi-Lan Li , Hui-An Tsai , Shu-Hsien Huang , Kueir-Rarn Lee","doi":"10.1016/j.seppur.2025.132807","DOIUrl":"10.1016/j.seppur.2025.132807","url":null,"abstract":"<div><div>The development of high-performance membranes for pervaporation applications requires the precise design and optimization of surface functionality to enhance water selectivity and transport efficiency. In this study, thin-film composite (TFC) membranes were modified using zwitterionic N-aminoethyl piperazine butane sulfonate (AEPBS) to improve separation performance. The functionalization process involved a two-step reaction: interfacial polymerization of polyethyleneimine (PEI) with trimesoyl chloride (TMC) followed by the covalent grafting of AEPBS. Fourier-transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS) confirmed the successful incorporation of zwitterionic sulfonate groups, significantly altering the membrane surface chemistry and enhancing hydrophilicity, as evidenced by reduced water contact angles. Morphological analysis revealed an increase in surface roughness and layer thickness, attributed to the functionalization process. The AEPBS-modified membrane achieved exceptional pervaporation performance, with a permeation flux of 2267.84 ± 138.09 g/m<sup>2</sup>·h and a separation factor of 1364.47 during alcohol dehydration using 70 wt% isopropanol (IPA) feed at 25 °C. Systematic variation of AEPBS concentration and grafting time revealed optimal conditions at 0.2 wt% AEPBS and 1-minute grafting, achieving the highest pervaporation separation index (PSI) of 3.09 × 10⁶ g/m<sup>2</sup>·h. The membrane demonstrated robust performance under diverse operating conditions, including varying feed temperatures and water concentrations, and maintained consistent separation efficiency during 168 h of continuous operation. These findings validate the potential of AEPBS-modified membranes for industrial applications, particularly in energy-efficient alcohol dehydration processes.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"366 ","pages":"Article 132807"},"PeriodicalIF":8.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758019","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

Low pressure thin film membranes with cellulose nanocrystals derived from Cannabis sativa for enhanced dye and salt removal 含有大麻提取的纤维素纳米晶体的低压薄膜，可提高染料和盐的去除率

IF 8.1 1区工程技术

Separation and Purification Technology Pub Date : 2025-04-02 DOI: 10.1016/j.seppur.2025.132829

Khona Maziya , Izak Kotze , Oranso T. Mahlangu , Heidi Lynn Richards

{"title":"Low pressure thin film membranes with cellulose nanocrystals derived from Cannabis sativa for enhanced dye and salt removal","authors":"Khona Maziya , Izak Kotze , Oranso T. Mahlangu , Heidi Lynn Richards","doi":"10.1016/j.seppur.2025.132829","DOIUrl":"10.1016/j.seppur.2025.132829","url":null,"abstract":"<div><div>Cellulose nanocrystals (CNCs) are gaining popularity as nanomaterials in membrane-based separation processes due to their environmental friendliness and sustainability. Thin film nanocomposite (TFN) membranes containing glutamic acid modified CNCs dispersed within a polyamide (PA) film were produced in this study using an interfacial polymerization (IP) reaction over a polysulfone (PSF) substrate for low-pressure nanofiltration (NF). To characterize the membranes, FTIR, SEM, AFM, and contact angle analysis were utilized. The resulting CNC-GLU TFN membranes (0.10 wt%) were more hydrophilic and smoother than the comparable thin film composite (TFC) membrane. The CNC-GLU TFN membrane outperformed pristine TFC membranes with a pure water flux of 15.45 ± 1.03 L/m<sup>2</sup>h (400 kPa), high dye rejection (99.83 % for methylene blue, 90.63 % for methyl orange) and salt removal (MgSO<sub>4</sub> = 86 %; NaCl = 38 %). This was attributed to the increased hydrophilic active layer, Donnan exclusion, and steric hindrance. Furthermore, the TFN membrane effectively removed MB and MO dyes from wastewater and demonstrated good operational stability after six cycles. These findings revealed the enormous potential of these membranes in wastewater treatment, separation, and purification in a wide range of industrial applications.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"366 ","pages":"Article 132829"},"PeriodicalIF":8.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143766973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High stability for the integrated CO2 capture and methanation reaction over the MgO-modified Ni-CaO bifunctional catalyst

IF 8.1 1区工程技术

Separation and Purification Technology Pub Date : 2025-04-02 DOI: 10.1016/j.seppur.2025.132845

Jingxun Zhou, Wenwen Zhang, Weiquan Cai, Chengxiong Dang

{"title":"High stability for the integrated CO2 capture and methanation reaction over the MgO-modified Ni-CaO bifunctional catalyst","authors":"Jingxun Zhou, Wenwen Zhang, Weiquan Cai, Chengxiong Dang","doi":"10.1016/j.seppur.2025.132845","DOIUrl":"10.1016/j.seppur.2025.132845","url":null,"abstract":"<div><div>Integrated CO<sub>2</sub> capture and conversion into CH<sub>4</sub> via in-situ methanation reaction (ICCU-methanation) provides an effective pathway for large-scale mitigation of anthropogenic carbon dioxide emissions. Keystone for the successful ICCU- methanation is the development of stable bifunctional catalysts to handle the sintering of metal particles and structural deterioration in a long-duration cyclic operation. Herein, we prepared a highly stable MgO-modified Ni-CaO bifunctional catalyst, maintaining 100% CO<sub>2</sub> conversion and 95.0% CH<sub>4</sub> selectivity throughout the entire 50 cycles. More importantly, the CO<sub>2</sub> sorption capacity loss of the optimal 10MgO-5Ni-CaO is only 22.5%. This excellent stability is attributed to the presence of MgO as a spacer that separates CaO particles to suppress their aggregation, thereby ensuring the structural stability of the catalyst. In addition, the formed Ni-Mg-O solid solution limits the migration and sintering of Ni particles, thereby effectively stabilizing Ni particles and guaranteeing their high methanation activity.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"366 ","pages":"Article 132845"},"PeriodicalIF":8.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760326","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

Development of a g-C3N4-based photocatalysis-self-Fenton system for efficient degradation and mineralization of organic pollutants 开发基于 g-C3N4 的光催化-自 Fenton 系统，实现有机污染物的高效降解和矿化

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-04-02 DOI: 10.1016/j.seppur.2025.132833

Minghui He, Meichen Sun, Handong Yu, Limin Su

{"title":"Development of a g-C3N4-based photocatalysis-self-Fenton system for efficient degradation and mineralization of organic pollutants","authors":"Minghui He, Meichen Sun, Handong Yu, Limin Su","doi":"10.1016/j.seppur.2025.132833","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.132833","url":null,"abstract":"Photocatalytic water treatment holds great promise for addressing global challenges associated with energy shortage and water scarcity. However, despite decades of research, its practical implementation remains constrained by the limited efficiency in generating and utilizing hydroxyl radicals (<sup>·</sup>OH). To this end, this study develops a photocatalysis-self-Fenton system based on graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>). By introducing P heteroatoms into the g-C<sub>3</sub>N<sub>4</sub> matrix, we enhance O<sub>2</sub> adsorption, while the incorporation of cyano groups improves H<sup>+</sup> adsorption (both of which favor H<sub>2</sub>O<sub>2</sub> generation) and prevents the generated H<sub>2</sub>O<sub>2</sub> from decomposing into <sup>·</sup>OH on the catalyst surface. This system boosts the steady-state concentration of <sup>·</sup>OH by approximately 42 times compared to photocatalytic system, while the homogeneous generation of <sup>·</sup>OH further enhances its utilization. As a result, it enables the complete degradation of 2,4-Dichlorophenol in only 20 min under visible light, with a mineralization rate of 71.21 %. Additionally, this system demonstrates broad applicability, achieving removal efficiencies exceeding 90 % for various typical organic pollutants (4-chlorophenol, bisphenol A, norfloxacin, ciprofloxacin, and sulfadiazine). Furthermore, its durability across multiple cycles underscores its potential for practical water treatment applications.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"107 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143767034","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

Direct fabrication of high-purity magnesium ingot using vacuum distillation technology

IF 8.1 1区工程技术

Separation and Purification Technology Pub Date : 2025-04-02 DOI: 10.1016/j.seppur.2025.132835

Chuanjun Li , Jiaxin Niu , Xuan Wang , Xiao Liang , Xinzhong Li , Fan Lv , Sheng Yu , Jianbo Yu

{"title":"Direct fabrication of high-purity magnesium ingot using vacuum distillation technology","authors":"Chuanjun Li , Jiaxin Niu , Xuan Wang , Xiao Liang , Xinzhong Li , Fan Lv , Sheng Yu , Jianbo Yu","doi":"10.1016/j.seppur.2025.132835","DOIUrl":"10.1016/j.seppur.2025.132835","url":null,"abstract":"<div><div>The conventional vacuum distillation technique for fabricating high-purity Mg faces challenges involving the difficulty of collecting fine Mg crystals and a reduction in purity due to remelting. In this study, a novel apparatus was designed to purify crude Mg and directly fabricate a high-purity Mg ingot, which overcomes the shortcomings of the conventional technique and shortens the process flow. A numerical simulation was conducted to investigate the formation mechanisms of distillates with different morphologies in different crucibles. It was found that Mg vapor could be changed to liquid in the crucibles in the middle part by adjusting the temperature and pressure; thus, a high-purity Mg ingot could be obtained, whereas only Mg crystals could be obtained by changing from vapor to solid in the crucibles in the rear part. Furthermore, the contents of some impurity elements (Mn, Pb, Al, and Ca) in the high-purity Mg ingot first decreased and then increased with an increase in the load temperature, with 973 K being the optimal load temperature. However, the purification of Zn impurities was limited. Finally, a high-purity Mg ingot with a mass greater than 100 g and purity higher than 99.996 % (4N6) was successfully fabricated, with the yield ratio reaching 65 % using the present apparatus. This study provides a new technique for the direct fabrication of high-purity Mg ingots.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"366 ","pages":"Article 132835"},"PeriodicalIF":8.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143766974","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