Adsorption最新文献

{"title":"The effect of surface modification on polyvinyl alcohol-chitosan hydrogels towards the recovery of metals from e-waste","authors":"P. Sivakumar,&nbsp;Raja S. Azarudeen,&nbsp;D. Prabhakaran,&nbsp;M. Thirumarimurugan","doi":"10.1007/s10450-025-00592-w","DOIUrl":"10.1007/s10450-025-00592-w","url":null,"abstract":"<div><p>Electronic waste poses a huge threat to the environment and health due to the release of toxic metals and coated resins occurred during improper recycling. In this context, a facile approach was employed for the preparation of surface modified hydrogels involving polyvinyl alcohol (PVA) and chitosan (CS) with conducting polymers viz. polyaniline (PANI) and polypyrrole (PPy) to remove the selective Pb(II) and Cd(II) ions from synthetic solution and real-time waste computer printed circuit boards (wPCBs). FTIR spectroscopy clearly revealed the crosslinking effectiveness, identification of functional groups and coating efficiency. The prepared hydrogels were thermally stable up to 500 ºC as determined from thermogravimetric analysis. The surface of PVA-CS hydrogel modified by PANI and PPy showed large amount of active sites to entrap the metal ions as revealed by scanning electron microscopy. Surface area determined by BET analysis for PVA-CS hydrogel coated by PANI and PPy with 299.7 and 264.05 m²/g, respectively exhibits an opportunity to recover huge amount of metal ions. At varied parameters such as surface coating efficiency, contact time and hydrogel dosage, the recovery of toxic metal ions was widely investigated. At an optimized condition, the hydrogels were employed for the successful recovery of selective Pb(II) and Cd(II) ions from the waste PCBs. Kinetic and isothermal models study revealed best fit results for Pseudo second-order and multilayer adsorption by Freundlich isotherm. Hence, the prepared surface modified hydrogels could act as promising adsorbents for the successful recovery of toxic and other precious metals from e-waste.</p></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"31 2","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109392","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":"Adsorption of organic solvent vapours on pristine and doped few-layer graphene nanoflakes","authors":"Stepan Yu. Kupreenko,&nbsp;Dmitry N. Stolbov,&nbsp;Sergey A. Chernyak,&nbsp;Konstantin I. Maslakov,&nbsp;Natalia E. Strokova,&nbsp;Mikhail M. Levin,&nbsp;Ekaterina A. Arkhipova,&nbsp;Anton S. Ivanov,&nbsp;Serguei V. Savilov","doi":"10.1007/s10450-024-00589-x","DOIUrl":"10.1007/s10450-024-00589-x","url":null,"abstract":"<div><p>Heterosubstitution is widely used to control the surface properties of graphene materials. The knowledge of the mechanism of organic solvent vapour sorption on doped graphene materials is necessary for development of air purification technologies, volatile organic compounds sensors, metal-free catalysis and for many other applications. The effect of N, S and Si doping and oxidative functionalization of few-layer graphene nanoflakes on the adsorption of organic solvent vapours was measured. The nanoflakes were also analyzed by TEM, XPS, Raman spectroscopy and low-temperature nitrogen physisorption. Special attention was paid to the dependence of the isosteric heat of adsorption on the surface coverage for various adsorbate-adsorbent pairs, which carry information about the energy inhomogeneity of the surface, the hierarchy of adsorbate-adsorbate, adsorbate-basal plane and adsorbate-functional groups interactions, and the mechanism of adsorption. This dependence for the hexane sorption can be used to detect hydrophilic groups on the surface, and to compare the degree of curvature of graphene layers in different heterosubstituted graphene materials.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"31 2","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109396","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":"Numerical analysis of equilibrium control in various isothermal adsorption modes: criteria for effective equilibrium determination","authors":"Chenghao Liu,&nbsp;Qingquan Liu,&nbsp;Biao Lv,&nbsp;Peizhuang Han,&nbsp;Yuanping Cheng,&nbsp;Liang Wang","doi":"10.1007/s10450-024-00586-0","DOIUrl":"10.1007/s10450-024-00586-0","url":null,"abstract":"<div><p>Adsorption is the process of enriching or depleting components at the interface of phases, and isothermal adsorption experiments are key to studying the adsorption capacity of coal-rock porous media. These experiments reveal that coal-rock samples require significant time to reach adsorption equilibrium, often lasting several tens of days, and the efficiency of various adsorption modes remains unclear. This paper introduces a mathematical model for gas isothermal adsorption at constant volume and varying pressure. It establishes numerical models based on three common adsorption modes and validates them against experimental results. Methane is initially adsorbed on the coal surface until uniform pressure is reached, after which it gradually penetrates the coal. Achieving uniform adsorption can take over 1000 h. By comparison, the time required for different adsorption modes to reach equilibrium for gas in coal under certain conditions was determined as follows: keeping the connecting valve open reduces time by 41.47% compared to keeping it closed at the same initial pressure, while closing the valve at the same equilibrium pressure shortens the time by 41.56% compared to keeping it open, and by 58.84% compared to constant pressure adsorption. Additionally, the paper discusses an equilibrium determination method based on pressure accuracy (Δ<i>p</i>) and determination duration (Δ<i>t</i>), emphasizing the need to avoid lower accuracy equipment and shorter durations in long adsorption processes. This research aids in selecting optimal experimental methods for time-consuming isothermal adsorption experiments and establishes criteria for determining adsorption equilibrium.</p></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"31 2","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109426","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":"Emerging nanotechnologies in adsorption of dyes: a comprehensive review of carbon and metal oxide-based nanomaterials","authors":"Mohammed Ahmaruzzaman,&nbsp;Saptarshi Roy,&nbsp;Anjana Singha,&nbsp;Sami Rtimi,&nbsp;Tejraj M. Aminabhavi","doi":"10.1007/s10450-024-00588-y","DOIUrl":"10.1007/s10450-024-00588-y","url":null,"abstract":"<div><p>With the growing global population and rapid industrial expansion, the demand for clean water has significantly surged. Major pollutants, such as textile dyes, heavy metals, sewage, and industrial effluents, are increasingly contaminating the aqueous sources, posing significant threat to the public health and to the entire eco-system. Traditional water treatment methods are struggling to meet this demand due to rising operational costs. To safeguard natural water bodies, efficient strategies are required to control and mitigate pollution. The groundbreaking discovery of nanomaterials, as one of the most versatile materials, and their broad applications across various industries have spurred researchers to explore further modifications to enhance their performance. Among these, carbon-based and metal-oxide based nanomaterials have emerged as highly efficient due to their abundant availability, efficiency, and cost-effectiveness compared to other types of nanomaterials. This review focuses on the increasing prevalence of contaminants, advancements in treatment technologies, and the role of adsorption as a key approach for the removal of contaminants. It highlights the various synthetic strategies and potential of nanomaterials, particularly carbon-based and metal oxide-based nano-adsorbents, in effectively treating dye-contaminated wastewater, offering advanced and cost-effective solutions for water purification. Additionally, this article provides a comprehensive discussion on multitude of aspects encompassing the adsorption kinetics and isotherms, while emphasizing on the different operating parameters associated with the adsorption process and the regenerability of the fabricated adsorbents. Dedicated sections focused on the real-world applications, environmental fate and toxicity, and economic feasibility of these nanomaterials have been extensively presented. Finally, the challenges associated with the practical implementation of these nano-adsorbents, as revealed in the literature, have been addressed, proposing ways for future advancements for addressing these challenges.</p></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"31 2","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143109502","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":"Investigation on the possibility of using the C2N semiconductor segment for adsorption and detection of some chlorofluorocarbons; a DFT survey","authors":"Farag M. A. Altalbawy,&nbsp;Iman Samir Alalaq,&nbsp;Vicky Jain,&nbsp;R. Roopashree,&nbsp;Junainah Abd Hamid,&nbsp;Mamata Chahar,&nbsp;Rajni Verma,&nbsp;Ahmed Read Al-Tameemi,&nbsp;Eftikhaar Hasan Kadhum,&nbsp;Shahad Abdulhadi Khuder,&nbsp;Merwa Alhadrawi","doi":"10.1007/s10450-024-00575-3","DOIUrl":"10.1007/s10450-024-00575-3","url":null,"abstract":"<div><p>In this project, we have studied the possibility of using the C2N Monolayer (ML) for sensing and adsorption of several chlorofluorocarbon (CFC) derivatives from the gaseous environment. The density functional theory (DFT) approach was applied to optimize the geometrical structures of the isolated C2N ML and its complexes with of CH₃F, CH₂F₂, CHF₃, CH₃Cl, CH₂Cl₂, CHCl₃, and CF₂Cl₂ air pollutants gases. The results of the thermodynamics of adsorption indicated that C2N ML could adsorb all of the considered CFCs except CF₂Cl₂. Also, the recovery time calculations showed that in all cases (from CHF₃ with the recovery time of 3.45(10^− 4) s to CF₂Cl₂ with the recovery time of 9.47(10^− 12) s) the C2N ML is a good recoverable sorbent. The results of the conductivity calculations indicate that the presence of CH₃F, and CH₃Cl increase the σ value for the isolated C2N ML from 1.94(10^− 29) S m^− 1 to 3.16(10^− 29) S m^− 1, and 3.07(10^− 29) S m^− 1, respectively. Thus, C2N ML is able to sence the presence of the mentioned CFCs.</p></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"31 2","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995181","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":"DFT study of the adsorption behaviors of glycine, hystidine and phenylalanine amino acids on the novel Ag4 cluster modified BSe nanosheets: applications to bionanosensors","authors":"Farag M. A. Altalbawy,&nbsp;Ali Fawzi Al-Hussainy,&nbsp;Suhas Ballal,&nbsp;Mekha Monsi,&nbsp;Chakshu Walia,&nbsp;G. V. Siva Prasad,&nbsp;Masar Almuttairi,&nbsp;Karar R. Al-Shami,&nbsp;Marwa Akram Nafea,&nbsp;Ahmed Mohsin Alsayah","doi":"10.1007/s10450-024-00573-5","DOIUrl":"10.1007/s10450-024-00573-5","url":null,"abstract":"<div><p>In this work, we searched for the exclusive electronic and adsorption properties of Ag₄ cluster modified BSe based nanomaterials for the purpose of sensing glycine, hystidine and phenylalanine amino acids. Adsorption distances, band structures, difference in electron densities and interaction energies were calculated to understand the impact of amino acids adsorptions on the chemical reactivity of Ag cluster modified BSe nanostructures. Diverse configurations were inspected for the adsorption of amino acids to survey the effective bio interface through the interaction with diverse sites existing on the organic amino acid molecules. The interaction of all amino acids via O site was found to be critical for energetically favorable adsorption modes. The PDOS analysis also revealed the large interactions of the amino acids with the Ag cluster modified BSe nanosheets. Our theoretical DFT results suggested that Ag₄ cluster modified BSe nanostructures held great potential for practical applications in biomolecular sensing of amino acids.</p></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"31 2","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995202","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":"Efficient calculation of the equilibrium composition in multicomponent batch adsorption with the steric mass action model","authors":"Norbert Kaiblinger,&nbsp;Rainer Hahn,&nbsp;Giorgio Carta","doi":"10.1007/s10450-024-00580-6","DOIUrl":"10.1007/s10450-024-00580-6","url":null,"abstract":"<div><p>Streamlined relationships are derived to predict the equilibrium composition in batch adsorption when the isotherm is described by the steric mass action (SMA) model, which is used extensively to represent macromolecule adsorption on ion exchange resins. In the general case with <i>N</i> components, the approach reduces the mathematical problem from a system of 2<i>N</i> equations to a single non-linear algebraic equation whose numerical solution is easily found. A graphical approach is also presented where isotherm lines describing mixture equilibrium values of the adsorbed concentrations of each component are plotted against the equilibrium solution concentration of a common reference species. In this case, the actual equilibrium composition is obtained at the intercept of the reference component equilibrium curve with the straight line representing the material balance for the reference species. Analytical expressions are provided for two and three-component mixtures. The graphical approach provides insight on the effects of the ratio of adsorbent and solution volumes on the equilibrium composition.</p></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"31 1","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10450-024-00580-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142906040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adsorption-biased characterization of porous solids","authors":"Katsumi Kaneko","doi":"10.1007/s10450-024-00565-5","DOIUrl":"10.1007/s10450-024-00565-5","url":null,"abstract":"<div><p>This article summarizes opening address in 9th Characterization of Porous Materials (CPM9). The role and historical sketch of main adsorption-based conferences such as Fundamentals of Adsorption (FOA), Characterization of Porous Solids (COPS), Pacific Basin Conference on Adsorption Science and Technology (PBAST), and Characterization of Porous Materials (CPM) are given. The unique role of CPM in adsorption-based characterization of porous materials is introduced in the above conferences. The concerted stimulation between innovated well-defined nanoporous materials and modernized adsorption studies supported by new theoretical and experimental approaches have given rise to quite active research activities mentioned above. The brief research activities of author’s group, which have aimed to bridge experimental and theoretical studies, are described; they have introduced in-situ X-ray diffraction, in-situ small angle X-ray scattering, high resolution adsorption measurement even from ultrahigh vacuum range, wide-temperature range in-situ IR spectroscopy for elucidation of the intermolecular structure of molecules adsorbed in nanopores. Also, future scope of the research on characterization of porous solids is proposed.</p></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"31 1","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10450-024-00565-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142906052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metal-loaded porous materials made from gold tailings: preparation and application in pollutants adsorption","authors":"Ning Yang,&nbsp;Yinghua Li,&nbsp;Yuxin Li,&nbsp;Shutong Yang,&nbsp;Sinan Liu,&nbsp;Fei Su,&nbsp;Jie Qian","doi":"10.1007/s10450-024-00554-8","DOIUrl":"10.1007/s10450-024-00554-8","url":null,"abstract":"<div><p>In this study, gold tailings were modified as a carrier and loaded with iron oxides. The composites with different Fe₂O₃ doping were prepared by adjusting the mass ratio of Fe₂O₃/modified slag (Fe₂O₃/MS) to obtain porous materials with larger specific surface area and more adsorption sites. The adsorption of Levofloxacin hydrochloride (LEV) from aqueous solutions over Fe₂O₃/MS samples was investigated. The process of adsorption was studied in terms of a number of variables, such as adsorbent dosage, LEV concentration, solution pH. The results showed that the optimal mass ratio of Fe₂O₃ to MS was 3:10. The ionic strength and coexisting ions had little influence on the adsorption effect of the composite material, so the material had a strong anti-interference ability. However, the pH of the initial solution and the ion phosphate had a significant effect on the adsorption effect, indicating that electrostatic and coordination interaction were the main adsorption mechanisms. The adsorption process of Fe₂O₃/MS to LEV can be better described by quasi secondary rate equation with a faster adsorption rate (K₂ = 4.43 × 10⁻³g/(mg·min)) and the maxmium adsorption capacity (Q_e= 57.65 mg/g). In a wide temperature range (288–308 K), the adsorption behavior of LEV can be well described by the Langmuir isothermal model. Moreover, the ecyclability and stability of the material was explored. This study provides a new idea for the recycling of gold tailings. While solving the problem of water pollution, it realizes the high value reuse of solid waste resources and achieves the purpose of using waste to curb pollution.</p></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"31 1","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889611","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":"Cadmium removal using Rhassoul/alginate composite beads: isotherms, kinetics, and thermodynamic study","authors":"Khadija Achchatar,&nbsp;Sabine Valange,&nbsp;Abdelhak Kherbeche,&nbsp;Hervé Gallard,&nbsp;Khalid Draoui","doi":"10.1007/s10450-024-00583-3","DOIUrl":"10.1007/s10450-024-00583-3","url":null,"abstract":"<div><p>Cadmium is a threat to human health and the environment. Therefore, there is a need for efficient and sustainable adsorbents to remediate cadmium-contaminated water. This study explores the effectiveness of Rhassoul clay/alginate composite beads in adsorbing cadmium from aqueous solutions, a simple, efficient, and cost-effective water treatment method. Various physicochemical factors influencing the adsorption capacity of the Rhassoul/alginate hybrid composite beads were examined, including adsorbent dosage (0.5–4.0 g/L suspension), contact time (30–360 min), pH (2–7), initial Cd²⁺ concentration (20–200 mg/L), and temperature (25–40 °C). The results revealed an adsorption capacity of 20 mg/g for non-modified Rhassoul clay, while the Rhassoul/alginate composite beads exhibited a significantly higher maximum adsorption capacity of 105 mg/g. Thermodynamic parameters (∆G°, ∆H°, and ∆S°) indicated the process was spontaneous and endothermic.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><img></picture></div></div></figure></div></div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"31 1","pages":""},"PeriodicalIF":3.0,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142890527","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}