Separation and Purification Technology最新文献_第9页

Rapid and efficient recovery of Au(I) from cyanide gold leachate via quaternary ammonium-functionalized chitosan fibers: Insights into synthesis mechanism and adsorption behavior

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-01-27 DOI: 10.1016/j.seppur.2025.131830

Xiaoyu Lin, Myung-Hee Song, Ling Lei, Duy Tho Tran, Yaorong Shu, Che-Ryong Lim, Xiaohui Wu, Juan Mao, Yeoung-Sang Yun

{"title":"Rapid and efficient recovery of Au(I) from cyanide gold leachate via quaternary ammonium-functionalized chitosan fibers: Insights into synthesis mechanism and adsorption behavior","authors":"Xiaoyu Lin, Myung-Hee Song, Ling Lei, Duy Tho Tran, Yaorong Shu, Che-Ryong Lim, Xiaohui Wu, Juan Mao, Yeoung-Sang Yun","doi":"10.1016/j.seppur.2025.131830","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.131830","url":null,"abstract":"For recovering gold from gold cyanide (Au(I)) leachate, quaternary ammonium (R4N+) functionalized chitosan fibers (QECFs) were developed. The synthesis process was finely tuned via the Box–Behnken design to maximize Au(I) adsorption efficacy. Additionally, the environmental impacts and estimated manufacturing costs of preparing QECFs were assessed through life cycle assessment and economic analysis. The QECFs demonstrated exceptional maximum adsorption capacities of 669.75 ± 47.20 mg/g at pH = 9.5 within 15 min, surpassing reported adsorbents in both capacity and rate. Comprehensive characterization of adsorbents and mechanisms was conducted using DFT conclusion, FE-SEM, FT-IR, and XPS. The findings elucidated those electrostatic interactions between the R4N+ on QECFs and Au(I), along with anion exchange involving Cl− and Au(I), are integral to the adsorption mechanism. Furthermore, the QECFs could be swiftly regenerated using NaCl solution. The practical application of QECFs yielded a remarkable recovery efficiency of 98.2 % for Au(I) from WPCBs leachates, underscoring their potential utility in the gold recovery.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"34 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143044365","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

Sustainable and recyclable starch-based ion exchange resin with superior exchange capacity and swelling resistance

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-01-27 DOI: 10.1016/j.seppur.2025.131831

Zhaoyong Gao, Wensheng Zou, Benzhi Ju, Bingtao Tang, Wei Ma, Wenbin Niu, Shufen Zhang

{"title":"Sustainable and recyclable starch-based ion exchange resin with superior exchange capacity and swelling resistance","authors":"Zhaoyong Gao, Wensheng Zou, Benzhi Ju, Bingtao Tang, Wei Ma, Wenbin Niu, Shufen Zhang","doi":"10.1016/j.seppur.2025.131831","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.131831","url":null,"abstract":"Biomass-derived adsorbents present a sustainable and cost-effective approach for industrial wastewater treatment. However, their effectiveness is often constrained by low adsorption capacity and significant swelling in water. In this work, a novel porous starch-based ion exchange resin was developed to address these limitations. The ion exchanger was synthesized by modifying tertiary amines onto starch, followed by dual-network crosslinking in an emulsion system. The synthesis of this ion exchanger was systematically investigated and confirmed through comprehensive characterization. This adsorbent demonstrates an ultra-high adsorption capacity of over 1500 mg · g−1 for water-soluble dyes, due to the introduction of weakly basic adsorption sites from the triazine-based modifier and melamine resin-based crosslinker, along with a porous structure that increases the specific surface area for adsorption. In dynamic adsorption–desorption studies with Reactive Blue X-BR as a model dye, the average desorption rate was found to be as high as 98.5 %, and the peak concentration of the dye in the desorbent was 32000 mg·g−1. The dual-network crosslinking and the incorporation of hydrophobic groups endow the resin with superior water resistance and a minimal swelling ratio (<15 %), which is crucial for maintaining consistent performance across multiple recycling cycles. Thus, the developed starch-based ion exchanger offers a promising alternative to petroleum-based ion exchange resins.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"34 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143044812","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

Study on the flocculation mechanism of diverging microporous curved surface Micro-Vortex flocculation magnetic stable bed reactor and its purification of Cr(VI)-containing wastewater

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-01-27 DOI: 10.1016/j.seppur.2025.131835

Yunxiao Ban, Jingang Wang, Cong Ma

{"title":"Study on the flocculation mechanism of diverging microporous curved surface Micro-Vortex flocculation magnetic stable bed reactor and its purification of Cr(VI)-containing wastewater","authors":"Yunxiao Ban, Jingang Wang, Cong Ma","doi":"10.1016/j.seppur.2025.131835","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.131835","url":null,"abstract":"In response to the contamination of water bodies by heavy metal pollution, particularly chromium (VI), this paper proposes a novel diverging microporous curved surface micro-vortex flocculation magnetic stable bed reactor for the treatment and purification of Cr(VI). The results show that under conditions of adding 0.0996 ∼ 1.373 mg/L FeSO4, 70 mg/L polyaluminum chloride (PAC), and 1.5 mg/L polyacrylamide (NPAM) respectively, and with an inlet flow rate of 0.023–2.101 m3/h for the reactor’s opposed-flow water distribution with different elevations, the removal rates of Cr(VI) and turbidity reach over 97 % and 99 %, respectively. By analyzing the instantaneous velocity vectors, streamlines, and vorticity distributions within the reactor using Particle Image Velocimetry (PIV) instruments, it is found that various turbulent flow patterns such as swirling flow, annular flow pattern, spiral flow, and water tongue flow are formed within the reactor. These flow patterns correspond to the generation of vortexes, micro-vortices, and micro-holes, resulting in a cascade flocculation phenomenon with their respective solid–liquid separation mechanisms. This makes the reactor a promising candidate for the treatment of heavy metal wastewater.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"45 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143044361","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

Selective separation of arsenic and antimony enabled by desolvation effect during distillation process: chlorine/oxygen affinity mechanism

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-01-27 DOI: 10.1016/j.seppur.2025.131829

Junfeng Kong, Huazhen Cao, Wenhua Xu, Weilun Qian, Lining Yu, Anyang Tang, Zhengzheng Liu, Huibin Zhang, Guoqu Zheng

{"title":"Selective separation of arsenic and antimony enabled by desolvation effect during distillation process: chlorine/oxygen affinity mechanism","authors":"Junfeng Kong, Huazhen Cao, Wenhua Xu, Weilun Qian, Lining Yu, Anyang Tang, Zhengzheng Liu, Huibin Zhang, Guoqu Zheng","doi":"10.1016/j.seppur.2025.131829","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.131829","url":null,"abstract":"The depth-separation of arsenic from antimony is crucial for achieving high-purity antimony metal. Chlorinated distillation has shown to effectively lower arsenic levels to just a few ppm, making it a promising method for arsenic impurity removal. However, many aspects of the deep separation mechanism of arsenic remain unexplored, posing technical barriers to effective arsenic removal in high-purity antimony production. This work introduces a “chlorine/oxygen affinity selective distillation” model to elucidate the mechanism underlying arsenic and antimony separation in chloride systems. Through thermodynamic analysis and quantum chemistry calculation, we demonstrate that arsenic species in different oxidation states exhibit markedly distinct affinities for chlorine and oxygen. The critical factor is the change in the solvation structure of As3+ as it interacts with Cl−, while the strong binding affinity between As5+ and oxygen inhibits chloride-mediated desolvation. Thus, HCl concentration plays a pivotal role in enhancing the separation efficiency of As3+ from Sb3+. Experimental results reveal that increasing HCl concentration from 5 mol/L to 7 mol/L boosts arsenic removal efficiency by 5.7 %. This mechanism may offer broader applications for the efficient separation of similar elements in chloride systems.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"6 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143044363","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

Localized proton enrichment by FeMoS2NF boosts fenton-like reactions for efficient organic contaminant removal under neutral conditions FeMoS2NF 的局部质子富集促进了芬顿样反应，从而在中性条件下高效去除有机污染物

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-01-27 DOI: 10.1016/j.seppur.2025.131755

Chaofan Zheng, Qu Wu, Kuiyuan Sun, Linbing Sun, Tengfei Jiang, Jinpeng Qian, Xiaohui Liu, Yongjun Sun, Bincheng Xu

{"title":"Localized proton enrichment by FeMoS2NF boosts fenton-like reactions for efficient organic contaminant removal under neutral conditions","authors":"Chaofan Zheng, Qu Wu, Kuiyuan Sun, Linbing Sun, Tengfei Jiang, Jinpeng Qian, Xiaohui Liu, Yongjun Sun, Bincheng Xu","doi":"10.1016/j.seppur.2025.131755","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.131755","url":null,"abstract":"Homogeneous Fenton-like systems are usually used for treating refractory organic wastewater, while their practical application still encounters narrow pH adaptability. In this context, large amounts of acid reagents are indispensable to ensure the high catalysis efficiency, which makes the whole arduous and expensive. Herein, we proposed a promising strategy of “localized proton enrichment” (LPE) for broadening the pH adaptability of heterogeneous catalysts. By utilizing S sites of metal sulfide as the “proton shuttle”, H+ can be enriched from bulk solution to the local catalytic Fe center, which is expected to overcome the pH limitation of conventional Fenton-like reactions. As a result, the as-constructed catalyst (Fe-MoS2NF) demonstrated excellent degradation performance within a wide pH range of 3.0–9.0. Compared with the conventional Fenton process catalyzed by Fe2+, Fe-MoS2NF exhibited more than 8.0-fold increment in pollutant removal performance under neutral condition. Based on this, the reaction promotion mechanisms of LPE effect were systematically explored. Furthermore, a scale-up catalytic system was established by immobilizing the powdery Fe-MoS2NF on a robust sponge skeleton, which indicates its significant potential in industrial application. Our work provides a universal and effective approach for overcoming the challenges encountered in the traditional Fenton process under neutral conditions.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"84 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143044718","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

Highlighting the technological consequences of thermodynamic non-idealities in mixture separations using microporous crystalline adsorbents 强调使用微孔结晶吸附剂进行混合物分离时热力学非理想状态的技术后果

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-01-27 DOI: 10.1016/j.seppur.2025.131757

Rajamani Krishna, Jasper M. van Baten

{"title":"Highlighting the technological consequences of thermodynamic non-idealities in mixture separations using microporous crystalline adsorbents","authors":"Rajamani Krishna, Jasper M. van Baten","doi":"10.1016/j.seppur.2025.131757","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.131757","url":null,"abstract":"Microporous crystalline adsorbents such as zeolites, and metal–organic frameworks (MOFs) have potential use in a wide variety of separations applications. Published data from experiments and molecular simulations reveal scenarios in which the Ideal Adsorbed Solution Theory (IAST) fails to provide a quantitative description of mixture adsorption equilibrium. The failure of the IAST is ascribable to non-compliance with one or more tenets mandated by the IAST such as (a) homogeneous distribution of adsorbates within the pore landscape, (b) no preferential location of guest species, and (c) absence of molecular clustering due to say hydrogen bonding. The primary aim of this article is to underscore the technological consequences of thermodynamic non-idealities in separations by undertaking three different case studies.For CO2 capture from humid gases in fixed bed adsorbers packed with CALF-20, the capture efficiency is significantly influenced by the thermodynamic non-idealities, necessitating the use of the Real Adsorbed Solution Theory (RAST) in simulations of adsorption/desorption cycles. The RAST based simulations underscore the strong influence of relative humidity on capture efficiency.The recovery of C2H4 from the reactor products of oxidative coupling of methane (containing CO2), the proper accounting of selectivity reversals induced by non-idealities is the key to the choice of LTA-5A zeolite as adsorbent in the Pressure Swing Adsorption (PSA) scheme. Ignoring thermodynamic non-idealities fails to anticipate selectivity reversals that are essential in the PSA scheme.For dehydration of water/ethanol mixtures in a membrane pervaporation unit, the strong hydrogen bonding between water and ethanol results in enhanced water permeation that is not anticipated by the IAST in zeolites and ZIF-8.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"1 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143044722","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

Crystallization-based recovery of potassium-boron rich triassic brine from sichuan basin: Modeling and experimental analysis at 348.2 K

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-01-27 DOI: 10.1016/j.seppur.2025.131813

Yu-Qiu Cen, Shi-Hua Sang, Ting Li, Zhen-Hua Feng, Ling-Xuan Wang, Wen-Feng Luo

{"title":"Crystallization-based recovery of potassium-boron rich triassic brine from sichuan basin: Modeling and experimental analysis at 348.2 K","authors":"Yu-Qiu Cen, Shi-Hua Sang, Ting Li, Zhen-Hua Feng, Ling-Xuan Wang, Wen-Feng Luo","doi":"10.1016/j.seppur.2025.131813","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.131813","url":null,"abstract":"The Triassic marine sedimentary brines in the eastern Sichuan Basin are rich in boron and potassium. To develop and utilize these brine resources, phase diagrams for the Na+, K+//Cl−, B4O72−-H2O quaternary system and its ternary subsystems were experimentally determined. The unreported single salts parameters, mixed ion interaction parameters for the Pitzer model, and solubility product constants K of salts at 348.2 K were fitted using solubilities of ternary subsystems systematically. Subsequently, the phase equilibria of the systems listed above were predicted using the Pitzer model.Based on phase diagrams and material balance calculations, a crystallization recovery process of the brines was designed. Isothermal evaporation experiments on actual brine achieved an evaporation rate of 93.1 %, with precipitation rates of 98.8 % for sodium salts, 81.6 % for potassium salts, and 38.4 % for borates. From 5 L of brine, 1407 g of NaCl and 183 g of KCl were crystallized. The theoretical evaporation trend and salt precipitation law of brine is consistent with the crystallization pattern obtained from actual isothermal evaporation experiments. The study demonstrates the potential for industrial recovery of sodium, potassium, and boron products, while proposing a comprehensive process to extract other valuable elements from raw brine.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"20 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143044782","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

Piperazine induced enhancement of absorption performance and degradation resistance in biphasic CO2 capture system 哌嗪诱导提高双相二氧化碳捕获系统的吸收性能和抗降解能力

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-01-27 DOI: 10.1016/j.seppur.2025.131843

Jun He, Yang Yang, Wenqing Xu, Zanbu Geng, Xianchun Li, Tingyu Zhu

{"title":"Piperazine induced enhancement of absorption performance and degradation resistance in biphasic CO2 capture system","authors":"Jun He, Yang Yang, Wenqing Xu, Zanbu Geng, Xianchun Li, Tingyu Zhu","doi":"10.1016/j.seppur.2025.131843","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.131843","url":null,"abstract":"The biphasic solvent has great potential for low-energy CO2 capture. Currently, most studies focus on promoting CO2 absorption performance while ignoring the degradation issue of amines. Here, a novel biphasic solvent was developed, wherein, the ring-structure organic amine with multiple amine groups (piperazine, PZ) was used to simultaneously enhance CO2 absorption performance and degradation resistance of MEA. Results indicated that CO2 absorption capacity increased by 23 % with PZ addition compared to M37B33H30 (M: MEA, B: n-butanol, H: water), while the viscosity and phase separation time were not remarkably affected. Meanwhile, the developed biphasic solvent showed a better degradation resistance than both single MEA and PZ. Specifically, the formation of acid anions was reduced by 66.4 % and 17.4 % compared to single MEA and PZ. It was found that the degradation products of PZ mainly include EPZ, AEP, MPZ. The degradation products of MEA mainly include HEGly, HEPO, HEI, HEA, AEHEIA, Adipamide, BHEOX, and HEEDA, which were significantly inhibited by PZ. The KI can furtherly enhance degradation resistance by removing the dissolved oxygen in the solvent, and the optimal addition amount is 3 %. However, excess KI causes the reduction of Fe3+ to Fe2+, which triggers Fenton reaction to generate hydroxyl radicals (•OH). Finally, a detailed degradation mechanism was proposed by comprehensively analyzing the results of current work and previous studies.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"39 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050315","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

Dual-functional amino-abundance ultrathin porous boron-doped g-C3N4 co-catalyst for lead halide perovskite-based efficient photocatalytic CO2 reduction

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-01-27 DOI: 10.1016/j.seppur.2025.131842

Congcong Tong, Qiao Chen, Yuanyuan Zhang, Chunmei Liu, Jingyi Hou, Yiwen Shi, Ranran Fu, Xiumei Shi, Manqing Xu, DongEn Zhang, Linxing Shi

{"title":"Dual-functional amino-abundance ultrathin porous boron-doped g-C3N4 co-catalyst for lead halide perovskite-based efficient photocatalytic CO2 reduction","authors":"Congcong Tong, Qiao Chen, Yuanyuan Zhang, Chunmei Liu, Jingyi Hou, Yiwen Shi, Ranran Fu, Xiumei Shi, Manqing Xu, DongEn Zhang, Linxing Shi","doi":"10.1016/j.seppur.2025.131842","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.131842","url":null,"abstract":"Development of efficient co-catalysts is a crucial strategy to improve photocatalytic CO2 reduction reaction of lead halide perovskites. In this work, dual-functional amino-abundance ultrathin porous boron-doped g-C3N4 (NH2-PB-CN) cocatalyst with solid-state proton donor is developed utilizing melamine as precursor material, NH4Cl as bubble template and H3BO3 as boron-dope source. On the one hand, NH2-PB-CN as co-catalyst forms II-type heterojunction with CsPbBr3, and photogenerated electrons would accumulate on the conduction band of NH2-PB-CN, whose large specific surface area increases the active sites for adsorption and activation of CO2 molecules. Moreover, compared with control g-C3N4 samples, the enhanced reduction potential of NH2-PB-CN also contributes to CO2 conversion. On the other hand, abundant amino groups on NH2-PB-CN as solid-state proton donor provide more protons for CO2 reduction than H2O proton source. To explore the effect of different functional groups on proton supply and CO2 conversion, OH-CN and SO3H-CN as control co-catalysts are synthesized. As a result, product yield of MF/NH2-PB-CN/CsPbBr3 reaches 103.21 μmol/g/h, which is 2.5, 1.1 and 1.7 times higher than those of MF/CN/CsPbBr3 with H2O as proton source, MF/OH-CN/CsPbBr3 and MF/SO3H-CN/CsPbBr3 with solid-state proton donors, respectively, suggesting the effective proton supply from amino groups. MF/NH2-PB-CN/CsPbBr3 also exhibits strong stability and sufficient proton supply, with no obvious yield decrease after four 8-h cyclic measurements.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"26 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050268","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

Facile and low-cost method for preparing multilayer ceramic membranes based on cordierite and abundant clay: Application to dye removal 基于堇青石和丰富粘土的多层陶瓷膜的简便低成本制备方法：应用于染料去除

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-01-27 DOI: 10.1016/j.seppur.2025.131752

Mouhssine Boutaleb, Kamal Tabit, Mohammed Mansori, Latifa Saadi, Mohamed Waqif

{"title":"Facile and low-cost method for preparing multilayer ceramic membranes based on cordierite and abundant clay: Application to dye removal","authors":"Mouhssine Boutaleb, Kamal Tabit, Mohammed Mansori, Latifa Saadi, Mohamed Waqif","doi":"10.1016/j.seppur.2025.131752","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.131752","url":null,"abstract":"Textile dyes represent a growing source of environmental pollution worldwide, affecting aquatic ecosystems and, by extension, human health. This study aims to develop low-cost ceramic membranes for the treatment of water contaminated by these dyes, using natural and economical materials. The membranes were made from abundant clay with different mass percentages of magnesium hydroxide, used as a pore-forming agent and were sintered at 900 °C and 1000 °C. To enhance filtration performance, the membranes were coated with a chemically, physically, and thermally stable layer of refractory cordierite phase. This was achieved using a sedimentation technique, which allowed precise control overthe thickness and ensured the formation of a thin, homogeneous layer. The microstructural evolution of the membranes was examined using XRF, XRD, SEM, and DTA-TGA techniques, while their properties were assessed through measurements of flux, permeability, porosity, density, and mechanical strength. Filtration performance was evaluated using a methylene blue solution. The results indicated that membranes sintered at 900 °C effectively filtered 99 % to 99.8 % of dyes, achieving fluxes between 46.36 and 84 L/(h·m2), with mechanical strengths ranging from 79 to 113 MPa. For membranes sintered at 1000 °C with 5 % magnesium hydroxide, filtration performance improved from 50 % to 99 % with the addition of a cordierite layer, resulting in fluxes between 61 and 77 L/(h·m2) and compressive strengths from 60 MPa to 136 MPa. Production costs for ceramic membranes are estimated at around 12 to 46 USD/m2, due to the use of low-cost materials and reduced sintering temperatures. The incorporation of the cordierite layer enhances the membranes’ suitability for demanding environments.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"114 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143044725","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