Copper adsorption onto synthesized nitrilotriacetic acid functionalized Fe3O4 nanoparticles: kinetic, equilibrium and thermodynamic studies

Singh, Dharmveer; Verma, Sunil; Gautam, Ravindra Kumar; Krishna, V.

doi:10.1016/j.jece.2015.07.020

Cited by 40 publications

(12 citation statements)

References 60 publications

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“…Beyond pH 9.0, MB adsorption by TGSH displayed no appreciable increase in the R% (93.4%). These results are compatible with the zero charge point (pH PZC ) of the TGSH (pH PZC = 7.4) that was determined according to Singh et al [67] methodology (inset in Fig. 3a).…”

Section: Effect Of Solution Phsupporting

confidence: 90%

Talc-graphite schist as a natural organo-mineral complex for methylene blue remediation: kinetic and isotherm study

et al. 2020

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Talc-graphite schist (TGSH) is a natural organo-mineral complex that was derived from the regional metamorphism of organic matter-bearing calcareous clays under the lowest temperature and pressure of the green schist facies (573-632 K and 1-3 Kbars, respectively). The application of TGSH that is widely available in the Meatiq area (Eastern Desert, Egypt) was investigated for the first time ever in the remediation of methylene blue dye (MB) from aqueous solutions. The characterization of the TGSH was carried out using various techniques (XRF, XRD, SEM, FT-IR and BET surface area), and its MB removal capacity was estimated at different experimental conditions. The MB adsorption by TGSH was time-and pH-dependent process, where 120 min was sufficient enough to attain equilibrium. The MB adsorption capacity by the TGSH was directly proportional to the applied temperature, confirming that the MB adsorption process was endothermic in behavior. Based on the determination coefficients, the pseudo-second-order equation (R 2 = 0.939) explained MB adsorption data better than the first-order one (R 2 = 0.653). Meanwhile, intra-particle diffusion was not the sole controlling rate in MB removal by the TGSH. Moreover, the nonlinear regressions of Langmuir model (R 2 = 0.876) explained the equilibrium data better than the other applied models (Temkin, R 2 = 0.793, and Freundlich, R 2 = 0.752). On the other hand, the estimated q max (maximum removal capacity) of Langmuir was 9.41 mg/g at ambient temperature. Hydrogen bonding and electrostatic interaction were the governing mechanisms of MB removal by TGSH with variable impact in accordance with the prevailing pH condition.

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Section: Effect Of Solution Phsupporting

confidence: 90%

Talc-graphite schist as a natural organo-mineral complex for methylene blue remediation: kinetic and isotherm study

et al. 2020

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“…In addition, the absorption spectra were observed at 571 and 413 cm -1 , which were assigned to stretching vibrations of Fe-O bonds of Fe 3 O 4 (Fig. 3A) [28]. This result clearly confirmed that the Fe 3 O 4 core was modified with silica.…”

Section: Characterizationsupporting

confidence: 61%

Core–shell SiO₂‐coated Fe₃O₄ with a surface molecularly imprinted polymer coating of folic acid and its applicable magnetic solid‐phase extraction prior to determination of folates in tomatoes

Areerob

Sricharoen

Limchoowong

et al. 2016

J of Separation Science

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A novel core-shell magnetic surface molecularly imprinted polymer with folic acid as a template was successfully synthesized by the sol-gel method. To generate Lewis acid sites in the silica matrix for the interaction of the metal coordinate with the template, 3-aminopropyltriethoxysilane was used as a functional monomer, tetraethyl orthosilicate as a cross-linker, and aluminum ions as a dopant. The magnetite encapsulated by the silica shell plays an important role as a magnetic-coated polymer. The synthesized product was characterized by powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and FTIR and UV/Vis spectroscopy. The powder X-ray diffraction patterns, FTIR and UV/Vis spectra confirmed the characteristics of the as-prepared silica coated magnetite and folic acid molecularly imprinted polymer. It was successfully applied for magnetic solid-phase extraction prior to the determination of folates in tomato samples using high-performance liquid chromatography with photodiode array detection. The detection limit of the proposed method was 1.67 μg/L, and results were satisfactory, with a relative standard deviation of < 3.94%.

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“…Several models have been employed to describe the kinetics, but the pseudo first order and the pseudo second order have dominated [158] in the existing research field for the adsorption reaction model. The linearized pseudo first order was introduced by Lagergren (1898) and is described by Equation ( 6) [159,160]:…”

Section: Adsorption Evaluation Strategiesmentioning

confidence: 99%

Heavy Metal Adsorption Using Magnetic Nanoparticles for Water Purification: A Critical Review

et al. 2021

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Research on contamination of groundwater and drinking water is of major importance. Due to the rapid and significant progress in the last decade in nanotechnology and its potential applications to water purification, such as adsorption of heavy metal ion from contaminated water, a wide number of articles have been published. An evaluating frame of the main findings of recent research on heavy metal removal using magnetic nanoparticles, with emphasis on water quality and method applicability, is presented. A large number of articles have been studied with a focus on the synthesis and characterization procedures for bare and modified magnetic nanoparticles as well as on their adsorption capacity and the corresponding desorption process of the methods are presented. The present review analysis shows that the experimental procedures demonstrate high adsorption capacity for pollutants from aquatic solutions. Moreover, reuse of the employed nanoparticles up to five times leads to an efficiency up to 90%. We must mention also that in some rare occasions, nanoparticles have been reused up to 22 times.

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Copper adsorption onto synthesized nitrilotriacetic acid functionalized Fe3O4 nanoparticles: kinetic, equilibrium and thermodynamic studies

Cited by 40 publications

References 60 publications

Talc-graphite schist as a natural organo-mineral complex for methylene blue remediation: kinetic and isotherm study

Talc-graphite schist as a natural organo-mineral complex for methylene blue remediation: kinetic and isotherm study

Core–shell SiO₂‐coated Fe₃O₄ with a surface molecularly imprinted polymer coating of folic acid and its applicable magnetic solid‐phase extraction prior to determination of folates in tomatoes

Heavy Metal Adsorption Using Magnetic Nanoparticles for Water Purification: A Critical Review

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Copper adsorption onto synthesized nitrilotriacetic acid functionalized Fe3O4 nanoparticles: kinetic, equilibrium and thermodynamic studies

Cited by 40 publications

References 60 publications

Talc-graphite schist as a natural organo-mineral complex for methylene blue remediation: kinetic and isotherm study

Talc-graphite schist as a natural organo-mineral complex for methylene blue remediation: kinetic and isotherm study

Core–shell SiO2‐coated Fe3O4 with a surface molecularly imprinted polymer coating of folic acid and its applicable magnetic solid‐phase extraction prior to determination of folates in tomatoes

Heavy Metal Adsorption Using Magnetic Nanoparticles for Water Purification: A Critical Review

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Core–shell SiO₂‐coated Fe₃O₄ with a surface molecularly imprinted polymer coating of folic acid and its applicable magnetic solid‐phase extraction prior to determination of folates in tomatoes