Separation Science and Technology最新文献

{"title":"Oxidation of ferrous ions enhanced by CaMg(CO ₃ ) ₂ for their efficient separation from neodymium solution","authors":"Kaibo Hu, Yucheng Liu, Xiaowen Zhou, Fang Gao, Chuanqi Zhang, Tianci Chen, Ke Li, Jiuyang Lin, Xuewei Li","doi":"10.1080/01496395.2023.2262743","DOIUrl":"https://doi.org/10.1080/01496395.2023.2262743","url":null,"abstract":"ABSTRACTThe waste products of NdFeB magnets are an attractive resource for the recovery of rare earth elements (REEs), especially for neodymium [Nd]. Conventional methods employed to remove ferric (Fe[II]) from Nd solutions involve high energy consumption and the extensive use of chemicals, including oxidants and pH regulators, leading to substantial wastewater generation. In this work, an environmentally friendly approach utilizing CaMg(CO3)2 was presented to remove Fe(II) from Nd solution. Under optimized conditions, including a reaction temperature of 70°C, a CO32-/Fe2+ ratio of 1.5/1, a reaction time of 240 min, and an initial concentration of 200 mg/L, the heterogeneous precipitation reaction on the surface of CaMg(CO3)2 exhibited an exceptional Fe(II) removal efficiency of 98.6%, with a negligible loss of Nd (only 0.8%). It was observed that the CaMg(CO3)2 not only provide a suitable alkaline environment for the selective precipitation of Fe(II), but also significantly enrich the concentration of dissolved oxygen at a high temperature. In fact, at a CaMg(CO3)2 concentration of 2 g/L, the dissolved oxygen concentration in the solution increased significantly to 15.5 mg/L at 70°C. Consequently, the usage of CaMg(CO3)2 facilitated the rapid conversion of Fe(II) to Fe(III) without the need for additional oxidants, which was perfect for the removal of Fe(II) rather than Nd.KEYWORDS: CaMg(CO3)2ferrous ions removalneodymiumdissolved oxygenprecipitation Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis study was financially supported by the Jiangxi Province Key Laboratory of Cleaner Production of Rare Earths (no. E03MYB0302), and the Research Projects of Ganjiang Innovation Academy, Chinese Academy of Sciences (no. E055ZA01), and the Self-deployed Projects of Ganjiang Innovation Academy, Chinese Academy of Sciences, and the Key Research Program of the Chinese Academy of Sciences (no. ZDRW-CN-2021-3), and the China National Key R&D Program (Grant no. 2022YFB3504303).","PeriodicalId":21680,"journal":{"name":"Separation Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135814367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Highly efficient and selective 99TcO ₄ ^– uptake from reprocessing low-level liquid waste using a zirconium-based metal−organic framework","authors":"Kankan Patra, Vinit K Mittal, Thichur P Valsala, Arijit Sengupta, Ashok K Sahu, Darshan B Sathe, Raj B Bhatt","doi":"10.1080/01496395.2023.2260949","DOIUrl":"https://doi.org/10.1080/01496395.2023.2260949","url":null,"abstract":"ABSTRACTEfficient and selective sequestration of pertechnetate ions (99TcO4–) from nuclear low-level waste (LLW) solution is very much desirable for the safe treatment of radioactive liquid waste. However, the separation of specific radionuclides from competitors is a huge challenge in separation science. In the nuclear fuel cycle, 99TcO4– is one of troublesome fission products due to long half-life, large inventory in spent fuel, significant radiation hazards, and high environmental mobility of 99TcO4– ions. Recently, the metal−organic framework (MOFs) has shown significant potentials toward 99TcO4– removal. So far, most of the studies were reported using ReO4– ions, an inactive surrogate of 99TcO4– ions, and very few MOF materials are applied for real-time 99TcO4– sequestration from nuclear waste solution in the presence of extreme conditions. Herein, we report 99TcO4– ion removal from low-level liquid nuclear waste solution using zirconium-based metal−organic framework UIO-66-NH2. The material has exhibited fast kinetics and record selectivity toward 99TcO4– ions, making the adsorbent highly promising.HIGHLIGHTS Successful synthesis of zirconium-based metal−organic framework UIO-66-NH2/UIO-66-NH3+ was carried out using the solvothermal method.Characterization of zirconium-based metal−organic framework UIO-66-NH2/UIO-66-NH3+ was carried out using PXRD, SEM, EDX, and elemental analysis.An ion exchange study of 99TcO4– ions was carried out with low-level waste (LLW) solution.UIO-66-NH2/UIO-66-NH3+ has exhibited fast kinetics and record selectivity toward 99TcO4– ions with low-level waste (LLW) solution.Feasibility and selectivity study of the TcO4− extraction process with nuclear reprocessing low-level waste (LLW) solution.KEYWORDS: UiO-66-NH2/NH3+ MOFseparation99TcO4– ionsnuclear waste solution AcknowledgmentsThe authors acknowledge U. Dani, G.M, R &WM, BARC (T), Dr. H.Pal, Professor, Homi Bhabha National Institute & Former Associate Director, Chemistry Group, BARC, Mumbai, and Dr. Biswajit Sadhu, Scientific Officer, HPD, BARC, Mumbai.Disclosure statementNo potential conflict of interest was reported by the author(s).Author informationAll the authors have given permission to the final version of the manuscript.","PeriodicalId":21680,"journal":{"name":"Separation Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135966586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improving anti-fouling properties of alumina tubular microfiltration membranes through the use of hydrophilic silica nanoparticles for oil/water separation","authors":"Anirban Ghosh, Ghader Mahmodi, Michael Miranda, Songpei Xie, Madelyn Shaw, Mark Krzmarzick, David J. Lampert, Seok-Jhin Kim, Clint P. Aichele","doi":"10.1080/01496395.2023.2259605","DOIUrl":"https://doi.org/10.1080/01496395.2023.2259605","url":null,"abstract":"ABSTRACTIn this study, hydrophilic silica nanoparticles (Si NPs) were used to modify α-alumina tubular membranes to improve their performance in terms of flux, oil rejection, and anti-fouling properties. Our work focuses on enhancing membrane performance, particularly for difficult applications such as produced water treatment. The prepared membranes were applied for oil-in-water emulsion treatment. After coating hydrophilic Si NPs, the oil contact angle improved from 133.8° to 171.4°. To prevent Si NPs from leaching off the surface of α-alumina tubular membranes, polyvinyl alcohol was used to coat the membranes as a pre-treatment step before Si NP modification. After coating the membrane with Si NPs, the roughness of the membrane surface decreased, likely leading to less fouling. After coating Si NPs, Total Organic Carbon rejection increased from 93.1% for pristine α-alumina tubular membranes to 97.7% for silica-modified membranes because of hydrophilic improvements of the modified membranes. The Si NP coating improved the anti-fouling property of membranes with the flux recovery ratio increasing from 71.3% for pristine α-alumina tubular membranes to 85.9% for silica-modified membranes. Scanning Electron Microscopy, Energy-dispersive X-ray spectroscopy, oil contact angle, and Atomic Force Microscopy characterization tests were done. The tests showed successful Si NPs impregnation and altered wettability.KEYWORDS: Oil/Water emulsionmembrane filtrationdip coatinghydrophilicitysilica modification AcknowledgmentsWe want to thank Dr. Imran Shaik for his assistance in measuring the oil contact angles.Disclosure statementNo potential conflict of interest was reported by the author(s).Statement of noveltyThe membrane development technique combines a novel pre-treatment method (using Polyvinyl alcohol) and a silica grafting technique to produce stable fumed silica coatings on membranes. After incorporating the hydrophilic Si NPs, the oil contact angle (OCA) improved from 133.8° to 171.4°. In addition, the surface roughness and associated containment traps on the membrane surface decreased, likely leading to less fouling. Total Organic Carbon (TOC) rejection increased from 93.1% for pristine α-alumina tubular membranes to 97.7% for silica-modified membranes because of hydrophilic improvements of the modified membranes. The Si NP coating improved the anti-fouling properties of membranes as evidenced by the flux recovery ratio increasing from 71.3% for pristine α-alumina tubular membranes to 85.9% for silica-modified membranes. To the best of our knowledge, there are no literature sources reporting the separation of oil and water using α-alumina membranes modified with fumed silica in a continuous cross-flow process.Additional informationFundingThe work was supported by the National Science Foundation under Grant No. OIA-1946093.","PeriodicalId":21680,"journal":{"name":"Separation Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136099080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Two new ammonium-based poly(ionic liquid)s for breaking water-in-crude oil emulsions","authors":"Mahmood M.S. Abdullah, Hamad A. Al-Lohedan","doi":"10.1080/01496395.2023.2266563","DOIUrl":"https://doi.org/10.1080/01496395.2023.2266563","url":null,"abstract":"ABSTRACTTwo new poly(ionic liquid)s (PILs) were synthesized, characterized, and applied in breaking water-in-oil (W/O) emulsions. For that, tetraethylene glycol (TG) was treated with thionyl chloride, obtaining dialkyl chloride (TC). TC was reacted with diamines 1,5-diaminopentane (AP) and 1,11-diaminoundecane (AU), forming the corresponding polyamines, TC-AP and TC-AU. Following this, TC-AP and TC-AU were quaternized with acetic acid (AA), producing poly(ionic liquid)s (PILs), TCAP-PIL, and TCAU-PIL, respectively. Chemical structures, thermal stability, surface activity, aggregation size, and zeta potential measurements were investigated using several techniques. In addition, their performance in breaking (PB) W/O emulsions in different ratios was investigated. TCAP-PIL and TCAU-PIL exhibited high PB at all ratios, while their performance improved as the crude oil ratio decreased. Moreover, TCAU-PIL showed higher PB than TCAP-PIL, which may be linked to the increased hydrophobicity of TCAU-PIL due to increased methylene units in the diamine chain compared to TCAP-PIL.KEYWORDS: Poly(ionic liquid)sdemulsificationwater-in-crude oil emulsion AcknowledgmentsThe authors acknowledge the financial support through Researchers Supporting Project number (RSPD2023R688), King Saud University, Riyadh, Saudi Arabia.Disclosure statementThe authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.Additional informationFundingThe authors acknowledge the financial support through Research Supporting Project number (RSPD2023R688), King Saud University, Riyadh, Saudi Arabia.","PeriodicalId":21680,"journal":{"name":"Separation Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136100889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Partitioning behavior of dyes in ionic liquids induced aqueous biphasic systems of PPG 725 & ammonium salts","authors":"Emmanuel A. Oke, Sushma P. Ijardar","doi":"10.1080/01496395.2023.2259600","DOIUrl":"https://doi.org/10.1080/01496395.2023.2259600","url":null,"abstract":"ABSTRACTPolypropylene glycol (PPG) is one of the most utilized polymers in aqueous biphasic systems. The low polarity of the polymer-rich phase restricts the application of the ABSs. The applicability of polymer rich ABSs can be induced by adding little amount of ionic liquids as adjuvants. Therefore, an analysis involving the introduction of a small amount of imidazolium-based ILs to PPG 725 + ammonium salts ABSs was performed. The phase diagrams as well as the partitioning behavior of dyes: Orange II (OII), Eriochrome Black T (EBT) and Brilliant Green (BG) were investigated. The addition of 5% 1-butyl-3-methylimidazolium acetate, [BMIM][AC] modulates the partition behaviors of all the investigated dyes. The employed ILs and dyes partitioned preferentially into the polymer-rich phase. The partition coefficients (Kdye) for all the dyes follow the sequence: BG > EBT > OII in all investigated ABSs. The results obtained are in accordance with the logarithm of octanol-water partition coefficients (log Kow) of the respective dyes. The recovery of BG dye from polymer phase has been studied successfully by adsorption onto chitosan.KEYWORDS: Aqueous biphasic systemsphase behaviorammonium saltsionic liquidsdyes AcknowledgmentsEmmanuel A. Oke acknowledges the financial assistance of Africa Scholarship-MEA under the scheme of the Indian Council for Cultural Relations (2019-2020).Disclosure statementNo potential conflict of interest was reported by the author(s).Statement of noveltyThe main objective of this paper is to study the effect of addition of small amount of imidazolium based ILs on aqueous biphasic systems of PPG 725 + inorganic ammonium salts: (NH4)2CO3, NH4H2PO4, (NH4)2SO4 and (NH4)2HPO4. Many researchers conducted similar kind of work on ABS of polymer but the present work is first report on ABS of PPG 725 and ammonium salts. The obtained results shows that require comparatively less amount of ammonium salts. The partitioning of dyes: Orange II (OII), Eriochrome Black T (EBT) and Brilliant Green (BG) were investigated in theses ABSs. The addition of 1-butyl-3-methylimidazolium tetrafluoroborate, [BMIM][BF4]; 1-butyl-3-methylimidazolium acetate, [BMIM][AC]; and 1-butyl-3-methylimidazolium trifluoromethanesulfonate, [BMIM][OTF] were investigated. The present of 5% 1-butyl-3-methylimidazolium acetate, [BMIM][AC] modulates the partitioning behavior of all the investigated dyes. The employed ILs and dyes partitioned preferentially into the polymer-rich phase. [BMIM][AC] is referred as greener ILs hence the studied ABSs can serve as eco-friendly separation systems for removal of dyes.Supplementary materialSupplemental data for this article can be accessed online at https://doi.org/10.1080/01496395.2023.2259600","PeriodicalId":21680,"journal":{"name":"Separation Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136099032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Low temperature hydrothermal processing to recover aluminum from nepheline syenite roast-leach residue","authors":"Jayashree Samantray, Amit Anand, Barsha Dash, Malay K. Ghosh","doi":"10.1080/01496395.2023.2260084","DOIUrl":"https://doi.org/10.1080/01496395.2023.2260084","url":null,"abstract":"ABSTRACTNepheline syenite is primarily an alumino-silicate rock which contains a major amount of potassium and aluminum. After potassium recovery through chloridizing roasting followed by water leaching method, the roast leach residue of nepheline syenite was considered for the aluminum extraction process due to its ample aluminum content. Sulfuric acid is chosen over other acids as it prevents the leaching of calcium. A 2^3 full factorial design was employed to study the effects of acid concentration, time, and temperature. Furthermore, to enhance the recovery and to forbid the leaching of silicon, autoclave leaching was preferred.Iron is generally leached with aluminum in the acid leaching process which could be removed effectively by pH adjustment. The leached liquor obtained after purification is evaporated by using a hot water bath. The liquor concentrated on slow evaporation to a point where aluminum sulfate started precipitating. Then, the concentrated liquor was kept overnight at 8°C in a cooling incubator. Aluminum sulfate was produced with 99.80% purity.KEYWORDS: Nepheline syenitealuminumhydrothermal process, aluminum sulfate AcknowledgmentsThe authors also appreciatively recognize the technical assistance provided by the institute staff for the characterization studies. One of the authors (JS) expresses her gratitude to CSIR for providing the fellowship under XII plan period projects.Disclosure statementNo potential conflict of interest was reported by the author(s).Statement of noveltyThe residues obtained after potassium recovery by chloridizing roasting followed by water leaching of silicate minerals and rocks such as feldspar, nepheline syenite etc. are rich in silicon, aluminum, calcium, and iron due to which these can be utilized in various ways. Hence, processing of these residues would be a value addition to the potassium recovery process by increasing the number of products.In our present work, we have tried to recover aluminum from the roast leach residue of nepheline syenite containing 21.43% aluminum as its oxide employing the acid leaching method. Among various acids, leaching with sulfuric acid was better for downstream processing for aluminum recovery. Three parameters chosen for a two[Citation3] full factorial design were time, temperature, and acid concentration. The leaching extent obtained at the design conditions was fed to Minitab 17, and regression equations were generated. Furthermore, to enhance the recovery and to forbid the leaching of silicon, model equations were utilized for autoclave leaching. As the liquor constitutes iron along with aluminum, hence it was removed by pH adjustment to get aluminum-rich liquor which was further processed to get aluminum sulfate crystals.","PeriodicalId":21680,"journal":{"name":"Separation Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136100209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Understanding the sorption behavior of tri, tetra and hexavalent f cations on metal–organic framework (MOF), ZIF-67: experimental and theoretical investigation","authors":"J. Mor, Anil Boda, S. K. Sharma, Musharaf Ali, Arijit Sengupta","doi":"10.1080/01496395.2023.2255740","DOIUrl":"https://doi.org/10.1080/01496395.2023.2255740","url":null,"abstract":"ABSTRACTMetal–organic frameworks (MOFs) are a class of compounds with modern-age technological importance due to diverse structural topologies, porosity, and modularity. ZIF-67 has been synthesized for efficient extraction of f cations in different oxidation states (UO22+, Th4+ and Eu3+) from aqueous pH medium exhibiting the trend in sorption efficiency as: KdTh(6.19 × 103) > KdU (5.20 × 103) > KdEu (1.58 × 103) in accordance to their chemical potential. Langmuir isotherm was found to be predominate with sorption capacity 85.9 mg g−1, 137.4 mg g−1 and 50.6 mg g−1 for U, Th and Eu, respectively. The sorption predominantly proceeded via pseudo 2nd order rate kinetics with rate constants: k2U ~0.089 g mg−1 min−1, k2Th ~0.011 g mg−1 min−1 and k2Eu ~0.04 g mg−1 min−1. The processes were found to be spontaneous as revealed from negative ΔG values; and endothermic in nature (ΔHU ~10.5 kJ mol−1; ΔHTh ~12.8 kJ mol−1; ΔHEu ~8.3 kJ mol−1). The sorption proceeded via the formation of an inner sphere complex as indicated from their enhancement in the entropy values on sorption due to the release of water molecules. The Density Functional Theory (DFT) predicted selectivity using binding energy (ZIF-67-Eu3+ ~ -60.90 eV, ZIF-67-Th4+ ~ -70.78 eV, ZIF-67-Th4+ ~ -69.52 eV) is in line with the experimental selectivity of Th4+ > UO22+ > Eu3+. Total density of states (TODS) and Projected density of States (PODS) were estimated in order to understand the interaction between the ZIF-67 and f cations.KEYWORDS: ZIF-67f-cationssorptionisothermradiolytic stability AcknowledgmentsThe authors wish to acknowledge Dr. P. K. Mohapatra, Associate Director, RC & I Group, BARC & Head, Radiochemistry Division.Disclosure statementNo potential conflict of interest was reported by the author(s).Metal-Organic Framework noveltyMetal-Organic Framework (MOF), ZIF-67 has been synthesized for efficient extraction of f-cations in different oxidation states (UO22+, Th4+ and Eu3+) from aqueous pH medium exhibiting the trend in sorption efficiency as: KdTh (6.19 × 103) > KdU (5.20 × 103) > KdEu (1.58 × 103) in accordance to their chemical potential. Langmuir isotherm was found to be predominate with sorption capacity 85.9 mg g−1, 137.4 mg g−1 and 50.6 mg g−1 for U, Th and Eu, respectively. The sorption predominantly proceeded via pseudo 2nd order rate kinetics with rate constants: k2U ~0.089 g mg−1 min−1, k2Th ~0.011 g mg−1 min−1 and k2Eu ~0.04 g mg−1 min−1. The processes were found to be spontaneous as revealed from negative ΔG values, and endothermic in nature (ΔHU ~10.5 kJ mol−1; ΔHTh ~12.8 kJ mol−1 ΔHEu ~8.3 kJ mol−1). The sorption proceeded via the formation of an inner sphere complex as indicated from their enhancement in the entropy values on sorption due to the release of water molecules. The Density Functional Theory (DFT) predicted selectivity using B.E. (ZIF-67-Eu3+ ~ −60.90 eV, ZIF-67-Th4+ ~ −70.78 eV, ZIF-67-Th4+ ~ −69.52 eV) is in line with the experimental selectivity of Th4+ > UO","PeriodicalId":21680,"journal":{"name":"Separation Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136235236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Separation of a two binary-azeotrope acetonitrile-cyclohexane-toluene ternary mixture via continuous triple column extractive distillation with heat integration: design, simulation, and multi-objective genetic-algorithm (MOGA) optimization","authors":"Salar Salmanipour, Ali Aghdami, S. Majid Abdoli, Amin Sokhansanj","doi":"10.1080/01496395.2023.2259606","DOIUrl":"https://doi.org/10.1080/01496395.2023.2259606","url":null,"abstract":"ABSTRACTUsing a sustainable method for separating azeotropic mixtures, such as extractive distillation, is crucial for environmental and resource sustainability. Cyclohexane, acetonitrile, and toluene are essential solvents in different chemical processes. This ternary mixture has two binary azeotropes between cyclohexane-acetonitrile and acetonitrile-toluene at atmospheric pressures. Using residue curve maps and a uni-volatility line, n-butylbenzene was selected as a viable entrainer for extractive distillation, among other possibilities. Unlike conventional designs, the recycled entrainer was only sent to the first column in this simulation. The wasted energy from the recycled entrainer was used to supply reboilers duty through integration. A 3-D material balance was performed to understand the separation procedures better. High-purity acetonitrile, cyclohexane, and toluene will also be obtained from the first, second, and third columns. Finally, a multi-objective genetic algorithm with 14 key decision variables was utilized to reduce total annual cost (TAC) and CO2 emissions and improve thermodynamic efficiency as objective functions from economic, environmental, and energy efficiency perspectives. Optimized results reveal that a heat-integrated design reduces almost 25% TAC and 46% CO2 emissions compared to conventional extractive distillation and does not significantly affect thermodynamic efficiency. This research could be valuable for separating azeotrope systems from other ternary mixtures.KEYWORDS: Azeotropic separationternary systemextractive distillationsimulationmulti-objective genetic optimization Disclosure statementNo potential conflict of interest was reported by the author(s).NomenclatureTableDisplay TableSupplementary materialSupplemental data for this article can be accessed online at https://doi.org/10.1080/01496395.2023.2259606","PeriodicalId":21680,"journal":{"name":"Separation Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136308422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Atomic insight into the activation mechanism of feldspar by sodium oleate in flotation separation of quartz and feldspar: XPS, AFM, and molecular dynamics","authors":"Jiwei Lu, Nailing Wang, Shuangke Li, Ziqin Lin, Qingbo Meng, Lixia Li","doi":"10.1080/01496395.2023.2260089","DOIUrl":"https://doi.org/10.1080/01496395.2023.2260089","url":null,"abstract":"ABSTRACTAs we all know, sodium oleate (NaOL) is usually used as a collector for oxidized minerals, but in this study, it is used as an activator for feldspar to separate from quartz. Therefore, the adsorption mechanism, topography, and configurations of NaOL on the quartz and feldspar surface were investigated using X-ray photoelectron spectroscopy, atomic force microscope, and molecular dynamics simulation at the atomic level. The results revealed that NaOL preferably interacted with the Al atoms on the feldspar surface mostly in the form of chemical adsorption and made the feldspar surface blurry and rough, so NaOL could activate feldspar and enhance its flotability. However, NaOL hardly reacts or is easily desorbed from the quartz surface. Thus, the adsorption differences of NaOL between the quartz and feldspar surfaces contributed to realize the effective separation of quartz and feldspar.KEYWORDS: FeldsparquartzNaOLactivatorchemical adsorption Disclosure statementNo potential conflict of interest was reported by the author(s).CrediT authorship contribution statementJiwei Lu: Conceptualization, Methodology, Writing – review and editing. Nailing Wang: Methodology, Writing-original draft, Writing – review and editing, Funding acquisition. Shuangke Li: Conceptualization, Methodology, Resources, Supervision, Funding acquisition. Ziqin Lin: Writing – review and editing. Qingbo Meng: Resources, Supervision. Lixia Li: Resources and Supervision.Additional informationFundingThe authors would like to thank the Fundamental Research Funds for the Central Universities (No. N2201010), GDAS’ Project of Science and Technology Development (No. 2020GDASYL-20200103103), and National Natural Science Foundation of China (No. 51704057) for financial support.","PeriodicalId":21680,"journal":{"name":"Separation Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136309261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A review on current pollution and removal methods of tetracycline in soil","authors":"Sixu Ren, Shiyao Wang, Yufei Liu, Yuxin Wang, Feng Gao, Yingjie Dai","doi":"10.1080/01496395.2023.2259079","DOIUrl":"https://doi.org/10.1080/01496395.2023.2259079","url":null,"abstract":"ABSTRACTDue to the widespread use of tetracyclines antibiotics (TCs) in livestock breeding, TCs has always caused soil pollution. TCs cannot only enter soil and water bodies through multiple channels but also accumulate in them over a long period. It is more abundant in soils, agricultural land. Primarily, should explore efficient methods for removing or degrading TCs. This review provides an overview of the birth, development and problem of soil contamination of TCs. Then focuses on the toxicity and effects of TCs on microorganisms, animals, and plants. Furthermore, in the following chapters, microbial -, plant -, animal – biodegradation methods are introduced to summarize the species and plants applied in soil TCs removal at this stage. Meanwhile, the principle mechanism of advanced oxidation processes is analyzed deeply to fill the gap. In addition, a case of microbial fuel cells based on sustainable bioenergetics with promising prospects for soil TCs removal is presented. Due to the interaction between carbonaceous materials and soil, the characteristics of adsorption method under soil environment are deeply analyzed.KEYWORDS: Antibiotic pollutionbiodegradationelectrochemistrysoiltetracyclines Disclosure statementThe authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.Statement of noveltyDue to the widespread use of tetracyclines antibiotics (TCs) in livestock breeding, TCs has always caused soil pollution. TCs are not only able to enter soil and water bodies through multiple channels but also accumulate in them over a long period of time. It is more abundant in soils, especially agricultural land. Hence, efficient methods for removing or degrading TCs should be explored. The first two sections of this review provide an overview of the birth, development and problem of soil contamination of TCs. The third section focuses on the toxicity and effects of TCs on microorganisms, animals, plants. Furthermore, in the following chapters, microbial -, plant -, animal – biodegradation methods are introduced to summarize the species and plants applied in soil TCs removal at this stage. Meanwhile, the principle mechanism of advanced oxidation processes is analyzed in depth to fill the gap. In addition, a case of microbial fuel cell based on sustainable bioenergetics with promising prospects for soil TCs removal is presented. Due to the interaction between carbonaceous materials and soil, the characteristics of adsorption method under soil environment are deeply analyzed. A critical analysis of contrast and reflection is presented at the end of each section.","PeriodicalId":21680,"journal":{"name":"Separation Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135010184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}