Adsorption最新文献_第9页

Adsorption of azo dyes onto environmentally friendly bacterial cellulose/kappa-carrageenan hydrogel: Isotherm and kinetic studies 环境友好型细菌纤维素/卡帕卡拉胶水凝胶对偶氮染料的吸附：等温线和动力学研究

IF 3 4区工程技术

Adsorption Pub Date : 2024-06-09 DOI: 10.1007/s10450-024-00486-3

Jacinta Botleng, Tejesvi Patel, Roselyn Lata, Robert Chang, David Rohindra

{"title":"Adsorption of azo dyes onto environmentally friendly bacterial cellulose/kappa-carrageenan hydrogel: Isotherm and kinetic studies","authors":"Jacinta Botleng, Tejesvi Patel, Roselyn Lata, Robert Chang, David Rohindra","doi":"10.1007/s10450-024-00486-3","DOIUrl":"10.1007/s10450-024-00486-3","url":null,"abstract":"<div>Bacterial cellulose (BC)/kappa carrageenan (κ-C) hydrogel was synthesized via in-situ method by inoculating the κ-C into the Acetobacter xylinum cell culture medium. The structural features of the hydrogel was characterized using Fourier Transform Infrared Spectroscopy. The presence of both biopolymers in the hydrogel was confirmed by the O–H stretching of BC at 3390 cm−1 and the sulfate group (-SO3) of κ-C at 1226 cm−1. Scanning electron microscope images of the hydrogel showed A 3-D network of fibrils with high porosity. The enhanced swelling capacity of the hydrogel in water at pH 7 is due to the combined number of hydrophilic groups from BC and κ-C. The conductivity of the hydrogel increased with increasing κ-C due to the increased number of sulfate groups (-SO3). The hydrogel had the ability to adsorb organic dyes; Congo red, Crystal violet and Methylene blue from neutral water at 27 °C. All the dyes fitted the pseudo second order kinetic model and followed both the Langmuir and the Freundlich adsorption isotherms indicating monolayer adsorption on heterogeneous surfaces. The ΔGoad was negative indicating spontaneous physisorption for the three dyes. The prepared hydrogel being environmentally friendly also showed an improved ability to adsorb the organic dyes.</div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"30 6","pages":"1315 - 1331"},"PeriodicalIF":3.0,"publicationDate":"2024-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141368208","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}

引用次数: 0

Selective adsorption of anionic dyes and carbon dioxide using uncarbonized PVA aerogels incorporated with GO/PANI hybrids 使用含有 GO/PANI 混合物的未碳化 PVA 气凝胶选择性吸附阴离子染料和二氧化碳

IF 3 4区工程技术

Adsorption Pub Date : 2024-06-09 DOI: 10.1007/s10450-024-00488-1

Jelmy E.J., Rinku Thomas, Ushamani Mythili, Honey John

{"title":"Selective adsorption of anionic dyes and carbon dioxide using uncarbonized PVA aerogels incorporated with GO/PANI hybrids","authors":"Jelmy E.J., Rinku Thomas, Ushamani Mythili, Honey John","doi":"10.1007/s10450-024-00488-1","DOIUrl":"10.1007/s10450-024-00488-1","url":null,"abstract":"<div>The environmental devastation, caused by unscrupulous and recurrent human intervention in the ecosystem is a global concern. Within the scope of relevance, this work discusses the development of adsorbents which eliminate both water and air pollutants. Graphene oxide/polyaniline hybrid incorporated polyvinyl alcohol (PVA) composite aerogels were successfully fabricated by environmentally friendly lyophilization method. Various fillers such as polyaniline (PANI), graphene oxide (GO), reduced graphene oxide (rGO), binary hybrids of GO/PANI and rGO/PANI was synthesized and characterized for structural and morphological peculiarities. The filler system which shows the highest anionic dye (model organic pollutant) adsorption ability was selected for the preparation of PVA composite. The freeze dried aerogel samples were characterized and it shows 98% removal of anionic dye (methyl orange, MO) within 24 h. The high percentage of anionic dyes removal from aqueous solutions is attributed to different mechanisms such as electrostatic attraction between positively charged PANI backbones and negatively charged MO molecules, π-π interaction & hydrogen bond formation between different functional groups present in adsorbate and adsorbent. The dye adsorption mechanism was well established based on the Boyd, Werber & Morris models and the adsorption isotherms were fitted in agreement with the Freundlich and pseudo-second-order models. The reusability studies on dye adsorption were also carried out up-to three cycles without much loss in the adsorption capacity. In addition, the preliminary analysis of CO2 adsorption at 25 °C and 900 bar indicates the suitability of the proposed composite aerogels for environmental remediation.</div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"30 6","pages":"1273 - 1290"},"PeriodicalIF":3.0,"publicationDate":"2024-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141368061","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}

引用次数: 0

Towards carbon neutral scientific societies: a case study with the International Adsorption Society 实现碳中和科学学会：国际吸附学会案例研究

IF 3 4区工程技术

Adsorption Pub Date : 2024-06-09 DOI: 10.1007/s10450-024-00494-3

Anne Streb, David Danaci, Ryan Lively, Philip Llewellyn, Akihiko Matsumoto, Marco Mazzotti, Ronny Pini, Benoit Coasne

引用次数: 0

Water adsorption on amorphous carbon nitride thin films synthesized by pulsed laser deposition 脉冲激光沉积合成的无定形氮化碳薄膜上的水吸附作用

IF 3 4区工程技术

Adsorption Pub Date : 2024-06-01 DOI: 10.1007/s10450-024-00500-8

Kamal Kayed

引用次数: 0

Identifying optimal amorphous materials for fluoride removal through Monte Carlo and neural network modeling 通过蒙特卡罗和神经网络建模确定最佳无定形除氟材料

IF 3 4区工程技术

Adsorption Pub Date : 2024-06-01 DOI: 10.1007/s10450-024-00496-1

Xuan Peng

{"title":"Identifying optimal amorphous materials for fluoride removal through Monte Carlo and neural network modeling","authors":"Xuan Peng","doi":"10.1007/s10450-024-00496-1","DOIUrl":"10.1007/s10450-024-00496-1","url":null,"abstract":"<div>Capturing CF4 is crucial for mitigating its substantial greenhouse effect and environmental impact in the microelectronics industry. Here we employed a hybrid approach combining grand canonical ensemble Monte Carlo molecular simulations and neural network models to screen over 100 amorphous materials for N2/CF4 gas adsorption storage and separation. Materials with higher adsorption capacities exhibited densities around 0.7 to 1.0 g/cm3 and pore sizes within the range of 1.4–1.6 Å. At 298 K and 1000 kPa, HCP-Colina-id0016 and aCarbon-Bhatia-id001 demonstrated the highest CF4 adsorption, reaching 5.65 and 5.34 mmol/g, respectively. For the separation of N2/CF4 mixtures, considering the comprehensive CF4 adsorption selectivity and capacity, we recommend HCP-Colina-id0016 at high pressure conditions (4500 kPa) and aCarbon-Bhatia-id001 at medium to low pressures (below 500 kPa). The separation of mixtures is more favorable at low CF4 concentrations, becoming more challenging as CF4 concentration increases. Additionally, the Ideal Adsorbed Solution Theory (IAST) accurately predicted the separation of the N2/CF4 system on amorphous materials. We found that the genetic algorithm-optimized neural network (GA-BP) outperformed the standalone backpropagation neural network (BP) in accurately predicting the relationship between material structural properties and CF4 adsorption, showing its potential for widespread application in large-scale material screening.</div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"30 6","pages":"1213 - 1224"},"PeriodicalIF":3.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141190319","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}

引用次数: 0

Improving the adsorption capacity of graphene oxide. Effect of Ca2+ on tetracycline retention 提高氧化石墨烯的吸附能力。Ca2+ 对四环素保留率的影响

IF 3 4区工程技术

Adsorption Pub Date : 2024-05-25 DOI: 10.1007/s10450-024-00493-4

Florencia M. Onaga Medina, Marcelo J. Avena, María E. Parolo

{"title":"Improving the adsorption capacity of graphene oxide. Effect of Ca2+ on tetracycline retention","authors":"Florencia M. Onaga Medina, Marcelo J. Avena, María E. Parolo","doi":"10.1007/s10450-024-00493-4","DOIUrl":"10.1007/s10450-024-00493-4","url":null,"abstract":"<div>Tetracyclines (TCs) constitute a group of antibiotics that are commonly used to treat bacterial diseases, in veterinary medicine and as an additive in animal feed. This broad application has led to their accumulation in food products and the environment because sewage treatment plants cannot completely remove them. Therefore, the aim of this study was to synthesize graphene oxide (GO) and evaluate its TC adsorption properties in aqueous media. The effects of pH (between 2.5 and 11) and Ca2+ concentration (between 0 and 1 M) were thoroughly investigated. Structural, textural, and electrokinetic properties of the prepared GO were determined by N2 adsorption/desorption, XRD, TEM, UV–vis, FTIR, XPS, thermogravimetry and electrophoretic mobility measurements. TC adsorption on GO is an interplay between the two main roles played by Ca2+: competitor or bridging cation. At low pH, there is cation exchange, and Ca2+ behaves as a competitor of the positively charged TC species, decreasing adsorption as calcium concentration increases. At high, the formation of Ca bridges between the surface and TC (GO-Ca2+-TC) is favored, increasing the adsorption of the antibiotic by increasing calcium concentration. Different combinations of Ca2+ and pH effects are important to improve the use of GO either as a pH-dependent and reversible TC adsorbent for decontamination or as pH-independent adsorbent for TC quantification with electrochemical sensors.</div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"30 6","pages":"1193 - 1203"},"PeriodicalIF":3.0,"publicationDate":"2024-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141151416","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}

引用次数: 0

Computational exploration of SF6 adsorption and decomposition on SiGe and calcium-decorated SiGe surfaces 硅锗和钙装饰硅锗表面的 SF6 吸附和分解计算探索

IF 3 4区工程技术

Adsorption Pub Date : 2024-05-25 DOI: 10.1007/s10450-024-00487-2

Jabir H. Al-Fahemi, Kamal A. Soliman

{"title":"Computational exploration of SF6 adsorption and decomposition on SiGe and calcium-decorated SiGe surfaces","authors":"Jabir H. Al-Fahemi, Kamal A. Soliman","doi":"10.1007/s10450-024-00487-2","DOIUrl":"10.1007/s10450-024-00487-2","url":null,"abstract":"<div>This study investigates the sensitivity and selectivity of gas adsorption (SF6, SO2F2, SOF2, SO2, and HF) on SiGe surfaces and Ca atom-decorated SiGe surfaces using Density Functional Theory (DFT). The optimized structures, bond lengths, and angles of the gas molecules are analyzed, providing valuable insights into their geometric features and bonding configurations. For every gas on both surfaces, important variables such as adsorption energy, and charge transfer are examined. In particular, there is a significant increase in charge transfer and adsorption energy when SF6 interacts with Ca$2D-SiGe as opposed to the SiGe surface. To emphasize changes in band gap and electronic structure, the study explores electronic properties such as density of states (DOS) and projected density of states (PDOS) spectra before and after gas adsorption. Electron density differences (EDD) analysis is used to clarify the type of interactions, including accumulation and depletion of charge. The results reveal that all gases except HF/ Ca$2D-SiGe showed chemical adsorption. The study also takes into account recovery time, an important metric for sensor materials, which is calculated for the breakdown gases of SF6 on both surfaces at different temperatures and shows potential uses for gas detection. Future research should focus on a broader range of gas molecules and their interactions with SiGe and Ca-decorated SiGe surfaces. Ultimately, the integration of SiGe-based sensor devices in real-world applications such as environmental monitoring, industrial safety, and medical diagnostics can be explored to understand the broader potential of these materials in the field of gas detection.</div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"30 6","pages":"1175 - 1191"},"PeriodicalIF":3.0,"publicationDate":"2024-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141151422","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}

引用次数: 0

The use of IAST for alcohol/water breakthrough separation simulations on all silica beta zeolite 使用 IAST 对全硅 beta 沸石进行酒精/水突破分离模拟

IF 3 4区工程技术

Adsorption Pub Date : 2024-05-22 DOI: 10.1007/s10450-024-00457-8

Gille R. Wittevrongel, Tom R. C. Van Assche, Joeri F. M. Denayer

{"title":"The use of IAST for alcohol/water breakthrough separation simulations on all silica beta zeolite","authors":"Gille R. Wittevrongel, Tom R. C. Van Assche, Joeri F. M. Denayer","doi":"10.1007/s10450-024-00457-8","DOIUrl":"10.1007/s10450-024-00457-8","url":null,"abstract":"<div>This paper investigates the use of the Ideal Adsorbed Solution Theory (IAST) for alcohol/water breakthrough separation simulations on an all-silica beta zeolite. Because of its very hydrophobic nature, this zeolite presents peculiar isotherms for water and the alcohols, 2-methylpropan-1-ol, and ethanol. Isotherm fitting was performed using the Dual Langmuir-Sips (DLS) model for 2-methylpropan-1-ol and ethanol, while the Brunauer–Emmett–Teller (BET) model was chosen for water. To overcome the issues for evaluating the BET spreading pressure integral during IAST calculations, its isotherm at high partial pressures was limited to a capacity where its pore volume equals the pore volume occupied by ethanol and 2-methylpropan-1-ol. A 1D, trace, isothermal, axially dispersed plug flow model was employed to simulate and predict breakthrough curves for binary and ternary mixtures containing 2-methylpropan-1-ol, ethanol, and water. The IAST breakthrough separation simulations were validated with experimental data where both the equilibrium and dynamic behavior match well. This study concludes that IAST can be applied to alcohol/water mixtures when it is combined with a uniform and almost defect-free all-silica adsorbent.</div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"30 7","pages":"1631 - 1641"},"PeriodicalIF":3.0,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141108677","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}

引用次数: 0

Discontinuous Galerkin finite element method for solving non-linear model of gradient elution chromatography 用于求解梯度洗脱色谱非线性模型的非连续伽勒金有限元法

IF 3 4区工程技术

Adsorption Pub Date : 2024-05-20 DOI: 10.1007/s10450-024-00490-7

Shamsul Qamar, Sadia Perveen, Kazil Tabib, Nazia Rehman, Fouzia Rehman

{"title":"Discontinuous Galerkin finite element method for solving non-linear model of gradient elution chromatography","authors":"Shamsul Qamar, Sadia Perveen, Kazil Tabib, Nazia Rehman, Fouzia Rehman","doi":"10.1007/s10450-024-00490-7","DOIUrl":"10.1007/s10450-024-00490-7","url":null,"abstract":"<div>In this study, a discontinuous Galerkin (DG) finite element method is employed to solve the nonlinear equilibrium dispersive (ED) model, for the simulation of multi-component gradient elution chromatography using a liquid mobile phase in fixed-bed columns. The ED model comprises a set of coupled nonlinear convection-dominated partial differential equations integrated with nonlinear Langmuir type adsorption isotherms. Gradient elution, characterized by the gradual increase in eluent strength through variations in the chemical composition of the mobile phase, is analyzed. An investigation into the advantages of gradient elution chromatography in comparison to isocratic elution is conducted via a sequence of numerical test experiments that assess the influence of solvent strength, modulator concentration, gradient start and end times, and gradient slope on the elution profiles and temporal moments. It has been observed that gradient elution chromatography influences the behavior, shape, and propagation speed of elution profiles, which subsequently affect the cycle time and column efficiency. The results of this study provide significant insights that are critical for understanding, optimizing, and enhancing gradient elution chromatography.</div>","PeriodicalId":458,"journal":{"name":"Adsorption","volume":"30 6","pages":"1161 - 1174"},"PeriodicalIF":3.0,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141122561","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}

引用次数: 0

Adsorption of thiophene using chitosan functionalized silica as a biopolymer composite 使用壳聚糖功能化二氧化硅作为生物聚合物复合材料吸附噻吩

IF 3 4区工程技术

Adsorption Pub Date : 2024-05-20 DOI: 10.1007/s10450-024-00484-5

L. Motlagh, S. Shabani, S. Ghaderzadeh

引用次数: 0