scholarly journals Metal-Organic Framework-101 (MIL-101): Synthesis, Kinetics, Thermodynamics, and Equilibrium Isotherms of Remazol Deep Black RGB Adsorption

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Vo Thi Thanh Chau ◽  
Huynh Thi MinhThanh ◽  
Pham Dinh Du ◽  
Tran Thanh Tam Toan ◽  
Tran Ngoc Tuyen ◽  
...  
Keyword(s):  
Experimental Data ◽  
Diffusion Model ◽  
Kinetic Models ◽  
Adsorption Process ◽  
Metal Organic Framework ◽  
Intraparticle Diffusion ◽  
Order Kinetic ◽  
Intraparticle Diffusion Model ◽  
Metal Organic ◽  
Organic Framework

In the present paper, the synthesis of metal-organic framework-101 (MIL-101) and Remazol Deep Black RGB (RDB) adsorption on MIL-101 were demonstrated. The kinetics of RDB adsorption on MIL-101 was studied using Weber’s intraparticle diffusion model and the pseudo-first- and pseudo-second-order kinetic models. Particularly, the statistical method of piecewise linear regression and multi-nonlinear regression was employed to analyse the adsorption data according to the previously mentioned kinetic models. The results indicated that the adsorption process followed the three-step pseudo-first-order kinetic equation, which was consistent with the results of the intraparticle diffusion model with three linear segments. This model best described the experimental data. In addition, the adsorption isotherm data were studied using five adsorption models, namely, Langmuir, Freundlich, Redlich–Peterson, Toth, and Sips in nonlinear forms, and the Langmuir model is the most appropriate for the experimental data. The values of energies of activation of adsorption were calculated, and they revealed that the adsorption process was of endothermic chemical nature. A statistical comparison using Akaike information criterion to estimate the goodness of fit of the kinetic and isotherm models was presented.

Preparation of metal organic framework hybridizing with poly(p-phenylene terephthalamide) fiber and adsorption properties for anionic dye

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Yi Liu ◽  
Guangyao Qiu ◽  
Tao Li ◽  
Ang Yan ◽  
Yongfeng Liu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Congo Red ◽  
Adsorption Process ◽  
Metal Organic Framework ◽  
Order Kinetic ◽  
Adsorption Efficiency ◽  
Content Type ◽  
Anionic Dye ◽  
Metal Organic ◽  
Organic Framework

Purpose To treat water pollution, especially the contamination resulted from organic dyes has aroused significant attention around the world, this study aims to prepare the metal organic framework (MOF) materials hybridizing with poly(p-phenylene terephthalamide) (PPTA) by means of a facile refluxing method and to systematically investigate adsorption performance for anionic dye Congo red as target molecule from aqueous solution. Design/methodology/approach The MOF materials hybridized by PPTA were fabricated by virtue of a facile refluxing method, characterized by thermogravimetric analysis, X-ray powder diffraction, Fourier transform infrared and pore structure. Findings The results showed that pseudo-second-order kinetic model could better describe the adsorption process for all the four materials, whereas Elovich model also fitted the process for the hybrid materials with PPTA. Adsorption isotherm analyses indicated that Langmuir isotherm could be used to describe the adsorption process. Introduction of appropriate amount of PPTA could enhance the adsorption affinity of the MOF materials for Congo red, and the maximum adsorption capacity could reach as high as 1,053.41 mg/g while that of the MOF material without PPTA was 666.67 mg/g, indicating introduction of PPTA could change the microenvironment of the MOF materials and increase the adsorption sites, leading to high adsorption efficiency. Research limitations/implications The microstructure of MOF hybridized materials in detail is the further and future investigation. Practical implications This study will provide a method to prepare MOF materials with high efficiency to treat anionic dyes like Congo red from aqueous solution. Originality/value Owing to the special characteristics of PPTA and similar to carbon tube, PPTA was introduced into MOF material to increased corresponding water stability. Because of aromatic ring and amide group on the surface of PPTA, the adsorption efficiency of the hybridized MOF material with appropriate amount of PPTA was greatly enhanced.

scholarly journals Highly Efficient Adsorption of Aqueous Pb(II) with Mesoporous Metal-Organic Framework-5: An Equilibrium and Kinetic Study

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
José María Rivera ◽  
Susana Rincón ◽  
Cherif Ben Youssef ◽  
Alejandro Zepeda
Keyword(s):  
Kinetic Study ◽  
Photoelectron Spectroscopy ◽  
Metal Organic Framework ◽  
Isotherm Models ◽  
Ionic Exchange ◽  
Order Kinetic ◽  
X Ray ◽  
Metal Organic ◽  
Mesoporous Metal ◽  
Organic Framework

Mesoporous metal-organic framework-5 (MOF-5), with the composition Zn4O(BDC)3, showed a high capacity for the adsorptive removal of Pb(II) from 100% aqueous media. After the adsorption process, changes in both morphology and composition were detected using a scanning electron microscope (SEM) equipped with an energy dispersive X-ray (EDX) system, Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS) analysis. The experimental evidence showed that Zn(II) liberation from MOF-5 structure was provoked by the water effect demonstrating that Pb(II) removal is not due to ionic exchange with Zn. A kinetic study showed that Pb(II) removal was carried out in 30 min with a behavior of pseudo-second-order kinetic model. The experimental data on Pb(II) adsorption were adequately fit by both the Langmuir and BET isotherm models with maximum adsorption capacities of 658.5 and 412.7 mg/g, respectively, at pH 5 and 45°C. The results of this work demonstrate that the use of MOF-5 has great potential for applications in environmental protection, especially regarding the removal of the lead present in industrial wastewaters and tap waters.

scholarly journals Carbonized Lanthanum-Based Metal-Organic Framework with Parallel Arranged Channels for Azo-Dye Adsorption

Nanomaterials ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 1053
Author(s):  
Krzysztof Cendrowski ◽  
Karolina Opała ◽  
Ewa Mijowska
Keyword(s):  
Kinetic Model ◽  
Adsorption Kinetics ◽  
Hydrophobic Interactions ◽  
Metal Organic Framework ◽  
Second Order ◽  
Order Kinetic ◽  
Order Kinetic Model ◽  
Metal Organic ◽  
Pseudo Second Order ◽  
Organic Framework

In this contribution, the synthesis of the metal−organic framework (MOF) based on lanthanum that exhibits trigonal prism shape is presented. The length of a single side of this structure ranges from 2 to 10 μm. The carbonized lanthanum-based organic framework (CMOF–La) maintained the original shape. However, the lanthanum oxide was reshaped in the form of rods during the carbonization. It resulted in the creation of parallel arranged channels. The unique structure of the carbonized structure motivated us to reveal its adsorption performance. Therefore, the adsorption kinetics of acid red 18 onto a carbonized metal−organic framework were conducted. Various physicochemical parameters such as initial dye concentration and pH of dye solution were investigated in an adsorption process. The adsorption was found to decrease with an increase in initial dye concentration. In addition, the increase in adsorption capacity was noticed when the solution was changed to basic. Optimal conditions were obtained at a low pH. Kinetic adsorption data were analyzed using the pseudo-first-order kinetic model, the pseudo-second-order kinetic model and the intraparticle diffusion model. The adsorption kinetics were well fitted using a pseudo-second-order kinetic model. It was found that the adsorption of anionic dye onto CMOF–La occurs by hydrophobic interactions between carbonized metal-organic framework and acid red 18.

scholarly journals Synthesis of metal organic framework MIL-53 (Fe)/Fe3O4 and adsorption ability of Congo Red in water invironment

2021 ◽  
Vol 10 (2) ◽  
pp. 94-98
Author(s):  
Hue Dang Thi Minh ◽  
Chau Tran Van ◽  
Giang Hoang Thi Linh ◽  
Luyen Tran Thi ◽  
Chinh Huynh Dang
Keyword(s):  
Congo Red ◽  
Adsorption Process ◽  
Metal Organic Framework ◽  
Adsorption Model ◽  
Adsorption Ability ◽  
Isothermal Adsorption ◽  
Adsorption Activity ◽  
Framework Materials ◽  
Metal Organic ◽  
Organic Framework

Composite materials MIL-53(Fe)/Fe3O4 have been successfully synthesized on the basis of MIL-53 metal organic framework materials by hydrothermal method. Material characteristics were studied through XRD, SEM methods. The material has good adsorption capacity of the Congo Red pigment. The Congo Red adsorption activity of the composite material was investigated. The results showed that the adsorption efficiency of Congo Red of MIL-53(Fe)/Fe3O4 reached 98.89% after only 5 minutes, with the concentration of 2.227 mg/l in Congo red solution. The Congo Red adsorption process of MIL-53 (Fe)/Fe3O4 follows the Freundlich isothermal adsorption model.

scholarly journals Facile Fabrication of Amino-Functionalized MIL-68(Al) Metal-organic Framework for Effective Adsorption of Arsenate (As(V))

2022 ◽  
Author(s):  
Alireza Rahmani ◽  
Amir Shabanloo ◽  
Solmaz Zabihollahi ◽  
Mehdi Salari ◽  
Mostafa Leili ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
High Surface ◽  
High Surface Area ◽  
Quadratic Model ◽  
System Response ◽  
P Value ◽  
Order Kinetic ◽  
Solution Ph ◽  
Metal Organic ◽  
Organic Framework

Abstract An amino-functionalized MIL-68(Al) metal-organic framework (amino-MIL-68(Al) MOF) was synthesized by solvothermal method and then characterized by FESEM, XRD, FTIR, EDX-mapping, and BET-BJH techniques. In order to predict arsenate (As(V)) removal, a robust quadratic model (R2 > 0.99, F-value = 2389.17 and p-value < 0.0001) was developed by the central composite design (CCD) method and then the genetic algorithm (GA) was utilized to optimize the system response and four independent variables. The results showed that As(V) adsorption on MOF was affected by solution pH, adsorbent dose, As(V) concentration and reaction time, respectively. Predicted and experimental As(V) removal efficiencies under optimal conditions were 99.45 and 99.87 %, respectively. The fitting of experimental data showed that As(V) adsorption on MOF is well described by the nonlinear form of the Langmuir isotherm and pseudo-second-order kinetic. At optimum pH 3, the maximum As(V) adsorption capacity was 74.29 mg/g. Thermodynamic studies in the temperature range of 25 to 50 °C showed that As(V) adsorption is a spontaneous endothermic process. The reusability of MOF in ten adsorption/regeneration cycles was studied and the results showed high reusability of this adsorbent. The highest interventional effect in inhibiting As(V) adsorption was related to phosphate anion. The results of this study showed that amino-MIL-68(Al) can be used as an effective MOF with a high surface area (> 1000 m2/g) and high reusability for As(V)-contaminated water.

scholarly journals High Performance of UiO-66 Metal-Organic Framework Modified with Melamine for Uptaking of Lead and Cadmium from Aqueous Solutions

2021 ◽  
Author(s):  
alaaS Abdelmoaty ◽  
Shaimaa El-Wakeel ◽  
Nady Fathy ◽  
AdlyA Hanna
Keyword(s):  
Metal Ion ◽  
Active Sites ◽  
High Performance ◽  
Metal Organic Framework ◽  
Ion Concentration ◽  
Great Promise ◽  
Order Kinetic ◽  
Lead And Cadmium ◽  
Metal Organic ◽  
Organic Framework

Abstract In this paper, UiO-66 metal-organic framework (MOF) was prepared by a hydrothermal method and modified consequently with melamine (MUiO-66), as so as enhance the adsorption properties of these materials in liquid-phase adsorption. With respect to this, the adsorption of lead and cadmium divalent ions was performed under varying conditions of pH, metal ion concentration, contact time, adsorbent dose and temperature. Morphology, texture properties, functional groups, crystallinity and thermal properties of both MOFs were examined. UiO-66 composed of sphere-like particles and covered by layers of melamine with enhancing in crystallinity and active sites as well as the total surface area increased from 1080 to 1160 m2/g. The modified UiO-66 with melamine (MUiO-66) showed a notable adsorption capacity of 177.5 and 146.6 mg/g for Pb and Cd (II) ions, respectively. Adsorption of both metals fitted well with the pseudo-second-order kinetic and Langmuir models and controlled by a physisorption mechanism at pH of 5. Also, adsorption process is an endothermic in nature and desorption is achieved well for three cycles by MUiO-66. Therefore, UiO-66 and MUiO-66 obtained in this work have a great promise in adsorption of heavy metals such as Pb and Cd(II) ions from wastewater.

scholarly journals CoFe2O4@SiO2/HKUST-1, A Novel Three-Metallic Magnetic Metal-Organic Framework: Synthesis, Methylene Blue Removal, the Study of Adsorption Isotherms and Kinetic Models

2021 ◽  
Author(s):  
Tahoura Saemian ◽  
Moayad Hossaini Sadr ◽  
Mehrnaz Gharagozlou ◽  
Behzad Soltani
Keyword(s):  
Electron Microscopy ◽  
Methylene Blue ◽  
Metal Organic Framework ◽  
Second Order ◽  
Order Kinetic ◽  
Assembly Method ◽  
Magnetic Metal ◽  
Metal Organic ◽  
Pseudo Second Order ◽  
Organic Framework

Abstract CoFe2O4@SiO2/HKUST-1 as a novel three-metallic magnetic metal-organic framework (MMOF) has been favorably synthesized via a simple self-assembly method. For this purpose, CoFe2O4@SiO2 was functionalized by Glutaric anhydride and 3-(triethoxysilyl)propylamine and then HKUST-1 was synthesized on the surface of CoFe2O4@SiO2. Powder X-ray diffractometry (XRD), Fourier transform infrared (FTIR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET), vibrating sample magnetometer (VSM), and simulated thermal analyzer (STA) were utilized to characterize the as-prepared samples. The methylene blue (MB) removal efficiency of CoFe2O4@SiO2/HKUST-1 has been set by examining factors such as the effect of pH, concentration of dye, amount of adsorbent, and components of a compound. Up to 100 percent dye removal in short reaction times and water media was reached in alkaline pH, by increasing the dose of adsorbent and in the presence of CoFe2O4@SiO2 and CoFe2O4@SiO2/HKUST-1 compounds. Freundlich adsorption isotherm that uses to describe the ongoing adsorption was found to be best fitted for the adsorption process.Based on pseudo-first-order, pseudo-second-order, and intraparticle diffusion kinetic equations, the pseudo-second-order kinetic model with rate constant (k2) 4 x10-3 g/mg.min is best fitted for adsorption methylene blue, indicating that removal of dye takes place dominantly through the chemisorption process.

scholarly journals Development and Adsorption Characterization of Metal Affinity-Immobilized Magnetic Liposome

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Yuan Lu ◽  
Dankui Liao ◽  
Xuezhen Feng ◽  
Hualin Meng ◽  
Yuting Lu ◽  
...  
Keyword(s):  
Adsorption Process ◽  
Intraparticle Diffusion ◽  
Order Kinetic ◽  
Intraparticle Diffusion Model ◽  
First Order ◽  
Metal Affinity ◽  
Order Kinetic Model ◽  
Pseudo Second Order ◽  
Antihypertensive Peptides

A metal affinity-immobilized magnetic liposome (MA-IML) was prepared in this research, which was with lipid and Ni2+ content of 143.25 μg/mg and 32 μmol/mg, respectively. The antihypertensive peptides Ile-Pro-Pro (IPP) and Val-Pro-Pro (VPP) could be adsorbed onto MA-IML under specific conditions, and the adsorption kinetics was explored. The pseudo-second-order kinetics (R2 value>0.98) was more suitable to describe the adsorption process of IPP and VPP than the intraparticle diffusion model and pseudo-first-order kinetic model. The results indicated that MA-IML could be used as an adsorbent for screening antihypertensive peptides from natural products.

scholarly journals Kinetic model for the sorption of copper ions onto sugar beet shreds

2014 ◽  
Vol 68 (6) ◽  
pp. 793-799 ◽  
Author(s):  
Mirjana Brdar ◽  
Marina Sciban ◽  
Dragana Kukic ◽  
Tatjana Dosenovic
Keyword(s):  
Sugar Beet ◽  
Diffusion Model ◽  
Copper Ions ◽  
Intraparticle Diffusion ◽  
Second Order ◽  
Least Square ◽  
Coefficient Of Determination ◽  
Order Kinetic ◽  
Intraparticle Diffusion Model ◽  
Pseudo Second Order

Adsorption kinetics is of great significance to evaluate the performance of adsorption process. The kinetics of copper ions adsorption onto different sized sugar beet shreds has been considered. Sugar beet shreds are very promising adsorbents due to their convenient chemical composition and availability in relatively large quantities in many countries. Experimental data were fitted with pseudo-first and pseudo-second-order kinetic models. Also, we used the intraparticle diffusion model for further analysis of kinetics. The coefficient of determination indicates that, the pseudo-second-order equation obtained by using non-linear least square method, was the most appropriate model for the description of copper ions adsorption onto sugar beet shreds. The adsorption capacities at equilibrium, for a particle size of 224 - 400 ?m, 400 - 750 ?m and 750 - 1000 ?m, are 10 mg/g, 9 mg/g and 8.6 mg/g, respectively. By using intraparticle diffusion model proposed by Weber and Morris, it was obtained that there exist two different stages in adsorption: fast initial adsorption which is further limited by intraparticle diffusion.

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