Separation and Purification Technology最新文献

Continuous visible-light photodegradation of emerging pollutants via in-situ cascade Fenton catalysis through dual active sites catalyst

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-01-29 DOI: 10.1016/j.seppur.2025.131859

Yu Jiang, Zeyang Sun, Si Wang, Chaoyu Li, Zihang Wang, Cheng Qian, Rui Wang, Ye Tan, Xuchao Sun, Shou-Dao Li, Feiyan Tang, Qiong Liu

{"title":"Continuous visible-light photodegradation of emerging pollutants via in-situ cascade Fenton catalysis through dual active sites catalyst","authors":"Yu Jiang, Zeyang Sun, Si Wang, Chaoyu Li, Zihang Wang, Cheng Qian, Rui Wang, Ye Tan, Xuchao Sun, Shou-Dao Li, Feiyan Tang, Qiong Liu","doi":"10.1016/j.seppur.2025.131859","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.131859","url":null,"abstract":"The photocatalytic treatment of emerging pollutants has garnered increasing attention by using continuous photodegradation system; however, limitations such as insufficient reactant adsorption and the lack of strong oxidative sites hinder its broader application. In this study, dual active sites functionalized polymeric carbon nitride (PCN) nanorods were synthesized through co-modified with loading of Fe and potassium. The resulting dual-site PCN catalyst exhibited significantly enhanced photocatalytic performance in the degradation of emerging pollutants, including bisphenol A, acetaminophen, carbamazepine, and oxytetracycline, under visible-light irradiation. The introduction of alkali metals as Lewis acid sites efficiently promoted oxygen adsorption and facilitated the generation of reactive H2O2. Simultaneously, the incorporation of Fe species enabled cascade catalysis with H2O2, forming reactive oxygen radicals via an in situ photo-Fenton system. The degradation pathway of bisphenol A involved C–C bond cleavage, hydroxylation, esterification, and ring-opening processes, while acetaminophen degradation occurred primarily through acetyl-amino group attack. To demonstrate its scalability, a fixed-bed reactor was constructed. It achieved continuous degradation of bisphenol A and acetaminophen with high removal efficiency and stable performance over five days. This long-term continuous photodegradation system, enabled by the dual-functionalized PCN, highlights its significant potential for solar-driven, large-scale wastewater treatment.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"158 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143055657","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

Adsorptive removal of Pb(II) using magnetic MOFs-modified chitosan composite: Preparation, performance and mechanism

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-01-28 DOI: 10.1016/j.seppur.2025.131850

Jing Li, Guo Lin, Hua Liang, Shixing Wang, Tu Hu, Libo Zhang

{"title":"Adsorptive removal of Pb(II) using magnetic MOFs-modified chitosan composite: Preparation, performance and mechanism","authors":"Jing Li, Guo Lin, Hua Liang, Shixing Wang, Tu Hu, Libo Zhang","doi":"10.1016/j.seppur.2025.131850","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.131850","url":null,"abstract":"In this work, a novel magnetic composite adsorbent (AHTT@CS/Fe3O4) was synthesized by modifying NH2-MIL-125(Ti) with 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole (AHTT) and cross-linking it with chitosan (CS) onto a Fe3O4 magnetic core. Structural characterization revealed a porous architecture enriched with active functional groups (<img alt=\"single bond\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\" style=\"vertical-align:middle\"/>NH2, <img alt=\"single bond\" src=\"https://sdfestaticassets-us-east-1.sciencedirectassets.com/shared-assets/55/entities/sbnd.gif\" style=\"vertical-align:middle\"/>SH), providing abundant adsorption sites for Pb(II) ions. The composite demonstrated a high theoretical adsorption capacity of 791.36 mg/g at pH 6, with adsorption behavior following the pseudo-second-order kinetic and Hill isotherm models, suggesting a synergistic mechanism driven by multi-site interactions. Thermodynamic analyses indicated a spontaneous and exothermic process, while the material maintained excellent selectivity for Pb(II) even in the presence of competing ions. Reusability tests confirmed its practical robustness, retaining over 80 % removal efficiency after five adsorption–desorption cycles. These results underscore the potential of AHTT@CS/Fe3O4 as a highly efficient, selective, and reusable adsorbent for the remediation of lead-contaminated wastewater.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"10 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050256","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

Interlayer-limited single-atom sub-nanoreactor facilitates efficient H2O2 activation

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-01-28 DOI: 10.1016/j.seppur.2025.131686

Haoran Tian, Kangping Cui, Xing Chen, Chenxuan Li, Kun Wang, Wenming Wu

{"title":"Interlayer-limited single-atom sub-nanoreactor facilitates efficient H2O2 activation","authors":"Haoran Tian, Kangping Cui, Xing Chen, Chenxuan Li, Kun Wang, Wenming Wu","doi":"10.1016/j.seppur.2025.131686","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.131686","url":null,"abstract":"Fenton reaction is an effective and widespread means of water purification, with the efficient generation of hydroxyl radicals (•OH) and harsh operating environments limiting their application to the total environment. The coordinated coordination environment of the active site is crucial for the Fenton catalytic process. This study reports the rational design and application of a domain-limited single-atom sub-nanoreactor (C-Fe-MoS2). The results show that carbon intercalation improves the interlayer confinement microenvironment of MoS2, and the dual coordination structure plays a key role in optimizing the electronic structure of the monoatomic iron sites, accelerating the H2O2 mass transfer adsorption and subsequent peroxy bond cleavage reactions. The acid modulation mechanism of MoS2 breaks the pH limitation and thus exhibits highly efficient degradation of various organic pollutants over a wide range of pH. This study provides a molecular mechanism for the effect of the coordination environment on the catalytic performance of active-site Fenton catalysts, which may shed light on the understanding of H2O2 activation mechanisms and the rational design of efficient catalysts.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"43 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050217","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

Synthesis of sulfonated metal-substituted hydroxyapatite and its polymeric composite for sequestration of lead and cadmium from water: Batch and column study

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-01-28 DOI: 10.1016/j.seppur.2025.131822

Sayak Saha Chowdhury, Devi Prasad Mishra, Sirshendu De

{"title":"Synthesis of sulfonated metal-substituted hydroxyapatite and its polymeric composite for sequestration of lead and cadmium from water: Batch and column study","authors":"Sayak Saha Chowdhury, Devi Prasad Mishra, Sirshendu De","doi":"10.1016/j.seppur.2025.131822","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.131822","url":null,"abstract":"Aluminium substituted hydroxyapatite (aHAp) was functionalized with sulfonate moieties employing an in-situ co-precipitation method using thioglycolic acid (TGA). Polymeric composite beads (denoted as aHAp-TGA PAN) were synthesized by immobilizing the modified aHAp (aHAp-TGA) nanoparticles in polyacrylonitrile (PAN) matrix for removal of toxic heavy metals, lead (Pb) and cadmium (Cd), from water. The adsorbents (both nanoparticles and composite) were characterized using state-of the art techniques. aHAp-TGA demonstrated a maximum saturation capacity of 1131 mg/g and 177 mg/g for Pb and Cd, respectively, evidencing significant increase in capacity (nearly 40 % for Pb and over 60 % for Cd) compared to aHAp due to the inclusion of sulfur-functionalities into the structure (through chelation and electrostatic interaction). The influence of adsorbent dose, pH, feed concentration, temperature and contact time were explored in detail along with the associated kinetic and thermodynamic parameters. High affinity of aHAp-TGA for Pb and Cd was indicated by the distribution coefficient (Kd: 3.66 × 105 mL/g and 1.25 × 104 mL/g, respectively). The selectivity in presence of interfering ionic species and the regeneration of the materials (for 5 cycles) were also observed. Dynamic uptake studies were conducted in adsorption column with aHAp-TGA PAN beads to study the breakthrough performance that was simulated using an available diffusion-adsorption-convection model. This work focuses on the efficient wastewater treatment using the macrobeads showcasing a sustainable and scalable media in real-field application.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"121 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050259","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

Green separation pathway for hydrocarbon compounds: Ionic liquid extraction technology

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-01-28 DOI: 10.1016/j.seppur.2025.131858

Zhijie Shang, Yaping Liu, Weizhi Shang, Hongbing Song, Pan Xu

{"title":"Green separation pathway for hydrocarbon compounds: Ionic liquid extraction technology","authors":"Zhijie Shang, Yaping Liu, Weizhi Shang, Hongbing Song, Pan Xu","doi":"10.1016/j.seppur.2025.131858","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.131858","url":null,"abstract":"In recent years, ionic liquids (ILs) have demonstrated various potential applications in separating hydrocarbon compounds due to their low volatility, high thermal stability, and excellent solubility properties. This work reviews the progress of research on ILs in separating aromatics, polycyclic aromatic hydrocarbons (PAHs), heterocyclic aromatic compounds, and olefin-alkanes. ILs demonstrate unique separation mechanisms and excellent performance for the various separation objects by modulating their cationic and anionic structures based on the combined application of π-π interactions, electrostatic interactions, and hydrogen bonding networks. Functionalized imidazole-based ILs significantly improve the selectivity and efficiency through synergistic interaction with the target compounds for separating aromatic hydrocarbons. Due to their enhanced complexation, metal-based ILs have become a critical technology in extracting polycyclic aromatic hydrocarbons. Regarding separating heterocyclic compounds, introducing fluorine-containing anions and metal complexes improves the separation ability of nitrogen compounds and sulfides. The combination of hybrid ILs, supercritical extraction, and other innovative technologies has further expanded the application scope of ILs. Moreover, introducing thermodynamic models provides more accurate predictions of the separation behavior of ILs. Briefly, this review provides a perspective on ILs and their application in the separation and purification of hydrocarbon compounds. Therefore, the realization of effective separation of specific classes or specific substances from hydrocarbon mixtures to obtain high-purity target products is far-reaching for petrochemical, energy, environmental protection, and other fields.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"32 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143055652","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

Multilevel screening and mechanism analysis of ionic liquids for separating pyridine from coal pyrolysis model oil

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-01-28 DOI: 10.1016/j.seppur.2025.131856

Qian Liu, Wei Meng, Yuxin Qiu, Lifang Chen, Zhen Song, Zhiwen Qi

{"title":"Multilevel screening and mechanism analysis of ionic liquids for separating pyridine from coal pyrolysis model oil","authors":"Qian Liu, Wei Meng, Yuxin Qiu, Lifang Chen, Zhen Song, Zhiwen Qi","doi":"10.1016/j.seppur.2025.131856","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.131856","url":null,"abstract":"The separation of high-purity pyridine from coal pyrolysis oil is a typical challenge faced in the coal chemical industry for the high-value utilization of resources. In this study, a systematic framework combining multilevel screening and mechanism exploration is presented to investigate ionic liquids (ILs) for efficiently separating pyridine from toluene as a representative of coal pyrolysis oil. First, the COSMO-RS model is used to predict the key thermodynamic properties of ILs, thereby pre-screening ILs with high separation potential. Then, a deep learning method is employed to estimate the key physicochemical properties of ILs for further IL screening. Subsequently, the performance of the remaining ILs in a continuous extraction and extractive distillation is evaluated in Aspen Plus to obtain better-performing ILs in terms of energy and solvent consumption. The optimal three ILs, namely [C3OHPy][C(CN)3], [C4mim][HSO4], and [C3OHC1Pyr][C(CN)3] are determined through the multilevel screening strategy. Finally, quantum chemical calculation and molecular dynamics simulation are elaborated to reveal the separation mechanism at the microscopic scale and verify the reliability of the screening results.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"206 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050258","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

Rational design of high-efficiency interfacial solar evaporator with low evaporation enthalpy based on biomass-derived materials and silica aerogel

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-01-28 DOI: 10.1016/j.seppur.2025.131736

Linyi Wu, Shuchang Guan, Wen Si, Binghua Zhou, Jie Wang, Shien Guo, Guozhen Zhu, Mingxi Wang, Gan Jet Hong Melvin, Hironori Ogata, Josue Ortiz-Medina, Masaki Tanemura, Yoong Ahm Kim, Mauricio Terrones, Morinobu Endo, Zhipeng Wang

{"title":"Rational design of high-efficiency interfacial solar evaporator with low evaporation enthalpy based on biomass-derived materials and silica aerogel","authors":"Linyi Wu, Shuchang Guan, Wen Si, Binghua Zhou, Jie Wang, Shien Guo, Guozhen Zhu, Mingxi Wang, Gan Jet Hong Melvin, Hironori Ogata, Josue Ortiz-Medina, Masaki Tanemura, Yoong Ahm Kim, Mauricio Terrones, Morinobu Endo, Zhipeng Wang","doi":"10.1016/j.seppur.2025.131736","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.131736","url":null,"abstract":"The proper design of evaporator structures and the selection of effective solar absorbers are the main methods for increasing the evaporation rate. In this study, we have selected carbonized natural wood (CNW) as a support for water transportation, a SiC and carbon composite (SCC) as an absorber from wood and rice husks by high-temperature annealing, and a thermal insulation layer of silica aerogel (SA) from water glass by freeze drying. All components were assembled in a trilayered solar evaporator, denoted as CAS. Owing to the abundant hydrophilic groups, superwettability, and vertical channels of CNW, ultralow thermal conductivity and porous structure of SA, and excellent light absorption and solar heat conversion of SCC, the trilayered CAS has a low evaporation enthalpy of 0.8118 MJ kg−1 and demonstrates a high evaporation rate (4.21 kg m-2h−1), an excellent evaporation efficiency of 94.94 %, good salt resistance, and long-term stability. In addition, CAS can be used to purify water from various contaminants with excellent performance. This study provides a sustainable method for preparing cost-effective evaporator components from biomass or cheap sources for solar evaporation, which is conducive to solving the global energy crisis, freshwater shortage issues, and the elimination of biomass waste.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"84 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050206","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

Biochar matrix anchoring pure phase Fe3C to promote advanced oxidation: A reliable pathway for organic wastewater purification

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-01-28 DOI: 10.1016/j.seppur.2025.131845

Jinghan Peng, Haixue Zhao, Haijian Wang, Yijing Feng, Yanan Yang, Yingtang Zhou, Nihong An, Xue Zhao

{"title":"Biochar matrix anchoring pure phase Fe3C to promote advanced oxidation: A reliable pathway for organic wastewater purification","authors":"Jinghan Peng, Haixue Zhao, Haijian Wang, Yijing Feng, Yanan Yang, Yingtang Zhou, Nihong An, Xue Zhao","doi":"10.1016/j.seppur.2025.131845","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.131845","url":null,"abstract":"Advanced oxidation process (AOPs) have a significant effect on eliminating harmful organic pollutants including bisphenol A (BPA) in water, but their effectiveness depends on the input of highly active catalysts. Here, a two-dimensional biochar platform was built using inexpensive pomelo mesocarp biomass as raw material, and a highly efficient AOPs catalyst (Fe/BC) with uniform dispersion of iron species was fabricated by surface crystallization, surface encapsulation, and pyrolysis technology. The Fe/BC-PMS (PMS: peroxymonosulfate) system can degrade up to 95.4 % of BPA in 30 min, and the mineralization rate up to 65.8 %, and still maintain about 80 % performance after repeated use for six times. The Fe/BC-PMS system can degrade BPA in complex water environments, including acidic and alkaline conditions, solutions containing coexisting cations and anions, and different water qualities. Continuous and efficient purification of organic pollutants was realized by mixing Fe/BC with quartz sand as the key component of a purification column, demonstrating the potential of Fe/BC in practical applications. Electrochemical signal response combined with radical capture and monitoring confirmed that Fe/BC drives PMS to convert into ·OH, SO4·- and 1O2, which are key reactive oxygen species that promote BPA degradation. Density functional theory (DFT) calculations reveal that the Fe3C site in Fe/BC can spontaneously adsorb PMS and activate O–O bond, which is the key to promoting the conversion of PMS into ROS. These findings offer a crucial experimental and theoretical foundation for the development of advanced AOPs catalysts, presenting cost-effective and efficient solutions for the degradation of harmful organic pollutants.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"206 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143050218","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 high-performance alginate-based composite aerogel for adsorption and recovery of phosphate and nitrate from livestock wastewater

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-01-28 DOI: 10.1016/j.seppur.2025.131820

Noha Amaly, Ceilidh Douglas, Gang Sun, Pramod K. Pandey

{"title":"Development of a high-performance alginate-based composite aerogel for adsorption and recovery of phosphate and nitrate from livestock wastewater","authors":"Noha Amaly, Ceilidh Douglas, Gang Sun, Pramod K. Pandey","doi":"10.1016/j.seppur.2025.131820","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.131820","url":null,"abstract":"Developing efficient technologies to recover valuable nutrients from livestock wastewater can reduce costs and improve environmental impacts of dairy production. Herein, a composite alginate aerogel was fabricated by embedding montmorillonite particles containing cationic cetylpyridinium (MT+) using a lanthanum salt as a crosslinker of alginate. The cationic charge density of the aerogel composite (MT+@Alg) was further increased by graft polymerizing a quaternary ammonium (QA) vinyl monomer to form MT+@QAlg with polycationic structures. The resulting MT+@QAlg aerogel, possessing a high BET surface area of 180 m2.g−1 with a uniform porous structure and multiple cationic centers including MT+ nanoparticles and polycationic side chains, demonstrated remarkable properties of high adsorption efficiencies and capacities of phosphate (600 mg.g−1) and nitrate ions (800 mg.L−1) within 30 min, good elasticity, and stable composite aerogel structures sustaining 50 compression cycles with only 10 % plastic deformation. The adsorbed phosphate could be extracted with an enrichment factor of 9.5. Furthermore, the MT+@QAlg aerogel exhibited superior dynamic adsorption and enrichment performance for phosphate from environmental manure wastewater at a flow rate of 300 mL.min−1. The enhanced adsorption efficiency was attributed to multiple adsorption mechanisms (La-Phosphate complexation, ion exchange and hydrophobic-hydrophobic interactions) which were confirmed through XPS, FTIR, and confocal analyses. The successfully MT+@QAlg aerogel shows great promise for applications in separation and recovery of nitrate and phosphate particularly from agricultural wastewater.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"21 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143055621","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

Cellulosic composite adsorbent prepared via high-speed shear induced regeneration and chemical modification for ciprofloxacin removal

IF 8.6 1区工程技术

Separation and Purification Technology Pub Date : 2025-01-28 DOI: 10.1016/j.seppur.2025.131854

Xiaoran Zhang, Linlin Gao, Qiuyue Hu, Xingyu Wang, Xin Gao, Lincai Peng, Keli Chen, Heng Zhang

{"title":"Cellulosic composite adsorbent prepared via high-speed shear induced regeneration and chemical modification for ciprofloxacin removal","authors":"Xiaoran Zhang, Linlin Gao, Qiuyue Hu, Xingyu Wang, Xin Gao, Lincai Peng, Keli Chen, Heng Zhang","doi":"10.1016/j.seppur.2025.131854","DOIUrl":"https://doi.org/10.1016/j.seppur.2025.131854","url":null,"abstract":"Utilizing environmentally friendly bio-adsorbents with ultra-high adsorption capacities to remove antibiotics from aqueous environments is a potential strategy in addressing global water pollution. Herein, a novel carboxyl-functionalised nanocellulose adsorbent (H-BTCA-RC) was successfully prepared from agricultural waste-derived regenerated cellulose (H-RC) and 1,2,3,4-butanetetracarboxylic acid (BTCA). The prepared H-BTCA-RC was used to evaluate its adsorptive performance for removing typical antibiotic ciprofloxacin (CIP) from water. Its efficiency was optimized based on factors such as pH, contact time, initial antibiotic concentration, temperature, and adsorbent dosage. Notably, the dispersion of H-RC chains among a matrix of encasing urea molecules with high-speed shear induced facilitates the development of well-ordered micro- and nanostructures inside H-RC, letting to a relatively high compressive strength of 200.5 kPa at 80 % strain. Results suggested that the intricate network composed with micro- and nanoscale H-RC architecture of the fibers functions as a scaffold for adsorbent, enhancing the availability of reactive –OH and increasing the accessibility for pollutants contact. Furthermore, the incorporation of BTCA facilitated the formation of adequate covalent bonds and hydrogen bonding interactions among H-RC fibers, culminating in a denser structural network within the cryogel. The adsorbent exhibited excellent adsorption characteristics of CIP with a removal efficiency of 95.63 % and an adsorption capacity of 300.01 mg/g. Additionally, the adsorbent showed high recyclability, retaining efficacy exceeding 91 % throughout more than ten cycles. This work demonstrates that cellulosic antibiotic adsorbent materials have potential in the utilization of agricultural waste for the efficient extraction of antibiotics from aquatic environments.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"36 1","pages":""},"PeriodicalIF":8.6,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143055653","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