Effect of nitrate and amine functionalization on the adsorption properties of a macroporous resin towards tetracycline antibiotic

A new extractant-impregnated resin (EIR), chrome azurol S-impregnated on XAD-2010, is used as an adsorbent to separate and preconcentrate U(VI) and Th(IV) ions prior to their spectrophotometric determination. Various instrumental techniques such as elemental analysis, FTIR, and SEM analysis were employed for full characterization of the synthetic extractant. Optimization of the adsorption and elution conditions of U(VI) and Th(IV) ions using synthesized chrome azurol S-impregnated XAD-2010 were studied. Langmuir isotherm model has the best fitting experimental data with a maximum adsorption capacity of 23.8 mg g −1 for U(VI) and 25.4 mg g −1 for Th(IV). The adsorption process of each metal ion using synthesized chrome azurol S-impregnated XAD-2010 showed an exothermic pseudo-second-order adsorption process. High tolerance limits for several studied metal ions on chrome azurol S-impregnated XAD-2010 were observed. The optimized method was applied on an international certified samples and different rock types bearing thorium and uranium with accurate results.

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“…The equations of pseudo-first-order and pseudo-secondorder models are specified as follows [65][66][67][68]:…”

Section: Effect Of Contact Time and Kinetic Studiesmentioning

confidence: 99%

Amberlite XAD-2010 Impregnated with Chrome Azurol S for Separation and Spectrophotometric Determination of Uranium and Thorium

2019

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“…where q e (mg/g) is the quantity of adsorbate adsorbed at equilibrium, C e (mg/L) is the concentration of adsorbate in the equilibrium state, b (L/mg) is the Langmuir constant, q max (mg/g) is the maximum adsorption capacity. The values of q max and b can be calculated via linear plots of C e /q e vs. C e [54,55]. The essential characteristics of the Langmuir model can be expressed by a constant called separation factor, R L , describing the sorption capability of the adsorbent and is given in Eq.…”

Section: Isotherms Of Phenol Adsorptionmentioning

confidence: 99%

Adsorptive removal of phenol from aqueous solutions using chemically activated rice husk ash: equilibrium, kinetic, and thermodynamic studies

Jafari¹,

Alahabadi²,

Saghi³

et al. 2019

Desalination and Water Treatment

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Phenol can cause environmental problems due to low biological degradation, high toxicity and long persistence in the environment. Thus, the removal of phenol and its derivatives from water is of great importance. Application of agricultural waste materials has been intensively investigated for many years for adsorptive removal of active pollutants. The objective of this research was to improve the adsorption capacity of rice husk ash by activation with different chemical agents for removing phenol from aqueous solutions. Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller (BET), and field emission electron scanning microscopy techniques were used for characterization, and the modified rice ash husk was compared with the conventional one. Results indicated that the effect of chemical treatment by NH 4 Cl was better than the other tested chemical agents. The BET specific surface area of NH 4 Cl-activated rice husk ash (ARHA) was 543 m 2 /g, and the average pore diameter was 3.24 nm. The isotherm and kinetic studies of phenol removal by ARHA showed that the Langmuir model and the pseudo-second-order equation represented the best fit with the adsorption data. The maximum adsorption capacity of phenol onto the newly activated rice husk ash was obtained from the Langmuir isotherm model, which was 66 mg/g.

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“…The Crank's single-hole diffusion model was used to fit the data of static dynamic experiment data. 6…”

Section: ■ Equation and Classical Modelsmentioning

confidence: 99%

“…It has been widely used in the research and production of traditional Chinese medicine. 6 The Rohm and Haas resin used in this article has a high exchange capacity, strong antioxidant properties, excellent kinetic properties, and antifouling properties. The adsorption process of cefpirome sulfate can be described quantitatively by adsorption kinetics.…”

Section: ■ Introductionmentioning

confidence: 99%

“…The method of adsorption by macroporous resin has the advantages of simple equipment, convenient operation, energy saving, high product purity, and no moisture absorption. It has been widely used in the research and production of traditional Chinese medicine . The Rohm and Haas resin used in this article has a high exchange capacity, strong antioxidant properties, excellent kinetic properties, and antifouling properties.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption Equilibrium, Kinetics, and Thermodynamic Studies of Cefpirome Sulfate by Using Macroporous Resin

et al. 2017

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The adsorption thermodynamics, kinetics, and isotherm parameters of cefpirome sulfate in aqueous solution on macroporous resin (XAD-16) were studied. Using static equilibrium tests, the fitting of resin adsorption data were calculated by the isothermal adsorption model. The fitting results show that Freundlich equation can adequately fit the adsorption isotherm. Meanwhile, the derived adsorption constants and their temperature dependencies from Freundlich isotherm had been used to calculate the corresponding thermodynamic quantities, such as the free energy of adsorption, heat, and entropy of adsorption. The thermodynamic data indicated that XAD-16 resin adsorption of cefpirome sulfate in aqueous solution was a spontaneous exothermic process, which was characterized by physical adsorption. The influences of initial concentration, bed height, and residence time on the breakthrough curve were examined by dynamic tests and the optimal parameters were defined.

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Effect of nitrate and amine functionalization on the adsorption properties of a macroporous resin towards tetracycline antibiotic

Cited by 27 publications

References 40 publications

Amberlite XAD-2010 Impregnated with Chrome Azurol S for Separation and Spectrophotometric Determination of Uranium and Thorium

Amberlite XAD-2010 Impregnated with Chrome Azurol S for Separation and Spectrophotometric Determination of Uranium and Thorium

Adsorptive removal of phenol from aqueous solutions using chemically activated rice husk ash: equilibrium, kinetic, and thermodynamic studies

Adsorption Equilibrium, Kinetics, and Thermodynamic Studies of Cefpirome Sulfate by Using Macroporous Resin

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