Magnetite nanoparticles for removal of heavy metals from aqueous solutions: synthesis and characterization

Giraldo, Liliana; Erto, Alessandro; Moreno–Piraján, Juan Carlos

doi:10.1007/s10450-012-9468-1

Cited by 230 publications

(95 citation statements)

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“…The zeta potential results show that the synthesized nano-Fe3O4 (6nm) used in this study was negatively charged, which could increase their adsorption capacity. It has been reported that the adsorption capacity of Fe3O4 nanoparticles depends on of various parameters including the different electrostatic attraction between heavy metal cations and negatively charged adsorption sites [4]. The use of magnetite nanoparticles as adsorbents provides a convenient approach to reduce the uptake of heavy metals and mitigate their toxicity in plants.…”

Section: Tolerance Index and Seedling Viabilitymentioning

confidence: 99%

Magnetite (Fe₃O₄) Nanoparticles Alleviate Growth Inhibition and Oxidative Stress Caused by Heavy Metals in Young Seedlings of Cucumber (Cucumis Sativus L)

Konaté

Rui

et al. 2017

ITM Web Conf.

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Accumulation of heavy metals in the ecosystem and their toxic effects through food chain can cause serious ecological and health problems. In the present study, experiments were performed to understand how the addition of magnetite (Fe 3 O 4 ) nanoparticles reduces the toxicity caused by Cd, Pb, Cu, and Zn in cucumber plants. Plant growth parameters, lipid peroxidation, and antioxidant enzymes were measured in seedling samples treated with either metals or metals supplemented with Fe 3 O 4 to demonstrate the reduction in metal-induced oxidative stress conferred by Fe 3 O 4 . Results showed that the toxic effect of metals on seedling growth parameters can be arranged in the rank order of inhibition as follows: Cu > Cd > Zn > Pb. Exposure to metals significantly decreased the seedlings growth, the activities of superoxide dismutase (SOD) and peroxidases (POD), while the malondialdehyde (MDA) content significantly increased in cucumber seedlings. The reducing activity of nano-Fe 3 O 4 against heavy metals stresses was confirmed in this study by the decrease in MDA content. The correlation between the decrease of MDA concentration and the increase in SOD and POD activities in the presence of nano-Fe 3 O 4 suggest that the MDA reduction in the tested seedlings can result from the increased enzyme activity.

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Section: Tolerance Index and Seedling Viabilitymentioning

confidence: 99%

Magnetite (Fe₃O₄) Nanoparticles Alleviate Growth Inhibition and Oxidative Stress Caused by Heavy Metals in Young Seedlings of Cucumber (Cucumis Sativus L)

Konaté

Rui

et al. 2017

ITM Web Conf.

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“…Previous Pb(II) adsorption work on magnetite nanoparticles with average sizes from 8 to 60 nm (Table IV), has shown equilibrium times achieved within the first 20-600 minutes of the experiments (Wang et al 2011, Giraldo et al 2013, Karami 2013, Wang et al 2014. These times are considerably shorter than the times obtained with our natural magnetite samples, presumably because of the extremely high surface area exposed in nanoparticles, which allows fast diffusion of the ions from the bulk solution to the nanomagnetite surfaces (Nassar 2010, Wang et al 2011.…”

Section: Comparison With Previous Work and Implications Of Magnetite mentioning

confidence: 52%

“…Also, natural samples reached equilibrium faster, but have considerably lower Zn(II) adsorption maxima than for Pb(II). The value of the hydrated radius of Zn(II) (4.30 Å) is larger than that of Pb(II) (4.01 Å) (Volkov et al 1997, Giraldo et al 2013) and therefore it is possible that the smaller hydrated Pb(II) reaches sites in natural magnetites inaccessible to Zn(II) (e. g., clay interlayer sites as magnetite impurities), requiring longer times to reach equilibrium. Conversely, for synthetic samples equilibrium was reached more rapidly for Pb(II) (Fig.…”

Section: Zn(ii) Adsorption Vs Timementioning

confidence: 99%

“…Among the metal oxides used, the iron oxide magnetite has proven useful for removing ions from polluted environments, especially from water and wastewater (Nassar 2010, Wang et al 2011, Giraldo et al 2013), but very limited work has been reported using natural magnetites. When applied to contaminated heterogeneous media, magnetite has the added potential advantage of magnetic separation from the solid matrix after adsorbing the target pollutants.…”

Section: Introductionmentioning

confidence: 99%

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CHARACTERIZATION AND SURFACE REACTIVITY OF NATURAL AND SYNTHETIC MAGNETITES: II. ADSORPTION OF Pb(II) AND Zn(II)

Camacho

Peñalosa

2017

Rev. Int. Contam. Ambie.

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Two synthetic and three natural magnetite samples that were obtained from an iron ore deposit located in Central-Western Mexico, were used to investigate the magnetite surface reactivity of different particle sizes towards aqueous Pb(II) and Zn(II). From these, the synthetic samples < 50 nm [specific surface area (SSA)] = 39.3 m 2 /g), < 5 mm (SSA = 7.3 m 2 /g), and natural samples 948-fine (SSA = 7.6 m 2 /g), 948 (SSA = 3.0 m 2 /g) and 996 (SSA = 1.4 m 2 /g), successfully removed Pb(II) from aqueous solutions at the investigated pH value of 5.8, but only the three first, finer magnetites removed significant aqueous Zn(II) at pH 7.0. The adsorption kinetics data were fitted using pseudo-second order and intraparticle models. The Pb(II) adsorption capacities were 140. 1, 33.3, 65.4, 69.8 and 17.0 mmol/g, for samples < 50 nm, < 5 mm, 948-fine, 948 and 996, respectively, while for Zn(II) they were 159.2, 38.8 and 28.2 mmol/g, for the first three previous samples, respectively. These adsorption capacities suggest that magnetite may play an important role as adsorbents of cationic contaminants in the environment, or that it may be used as efficient remediating agent, but it's limited to particle sizes with specific surface areas above 3 m 2 /g.Palabras clave: cinética, metales, remoción, agregación, nanopartículas, óxidos de hierro RESUMEN Dos muestras de magnetita sintética y tres naturales, que fueron obtenidas de un yacimiento minero ubicado en el centro-occidente de México, se utilizaron para investigar la reactividad superficial de magnetitas de diferentes tamaños de partícula hacia Pb(II) y Zn(II). Los resultados mostraron que las magnetitas sintéticas < 50 nm [área superficial específica (ASE) ] = 39.3 m 2 /g), < 5 mm (ASE = 7.3 m 2 /g), y las naturales 948-fina (ASE = 7.6 m 2 /g), 948 (ASE = 3.0 m 2 /g) y 996 (ASE = 1.4 m 2 /g), removieron exitosamente Pb(II) en disolución acuosa al pH investigado de 5.8, pero sólo las primeras tres magnetitas más finas removieron significativamene también Zn(II) acuoso a pH 7.0. Los datos de cinética de adsorción se ajustaron utilizando los modelos de pseudosegundo orden y difusión intrapartícula. Las capacidades de adsorción para Pb(II) fueron de 140.1, 33.3, 65.4, 69.8 y 17.0 mmol/g, para las muestras < 50 nm, < 5 mm, Rev. Int. Contam. Ambie. 33 (1) 165-176, 2017 DOI: 10.20937/RICA.2017 C. A. Salazar Camacho and M. Villalobos Peñalosa 166 948-fina, 948 y 996, respectivamente. Mientras que para Zn(II) fueron 159.2, 38.8 y 28.2 mmol/g, para las tres primeras anteriores, respectivamente. Estos valores de capacidad de retención sugieren que la magnetita puede desempeñar un papel importante como adsorbente de contaminantes catiónicos en el ambiente, o puede ser utilizada como adsorbente eficiente en esquemas de remediación, pero está limitada a tamaños de partícula de áreas superficiales específicas por arriba de 3 m 2 /g.

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“…Unlike organic contaminants, heavy metals are not biodegradable and can lead to accumulation in living organisms, causing various diseases and disorders. Therefore, in recent years, many investigations have focused on the removal of heavy metals from water 1- 8 . One of the more important toxic heavy metals present in water and wastewaters is nickel.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Ni²⁺from aqueous solution by magnetic Fe@graphite nano-composite

Konicki

Pelka

Arabczyk

2016

Polish Journal of Chemical Technology

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The removal of Ni 2+ from aqueous solution by iron nanoparticles encapsulated by graphitic layers (Fe@G) was investigated. Nanoparticles Fe@G were prepared by chemical vapor deposition CVD process using methane as a carbon source and nanocrystalline iron. The properties of Fe@G were characterized by X-ray Diffraction method (XRD), High-Resolution Transmission Electron Microscopy (HRTEM), Fourier Transform-Infrared Spectroscopy (FTIR), BET surface area and zeta potential measurements. The effects of initial Ni 2+ concentration (1-20 mg L -1 ), pH (4-11) and temperature (20-60 o C) on adsorption capacity were studied. The adsorption capacity at equilibrium increased from 2.96 to 8.78 mg g -1 , with the increase in the initial concentration of Ni 2+ from 1 to 20 mg L -1 at pH 7.0 and 20 o C. The experimental results indicated that the maximum Ni 2+ removal could be attained at a solution pH of 8.2 and the adsorption capacity obtained was 9.33 mg g -1 . The experimental data fi tted well with the Langmuir model with a monolayer adsorption capacity of 9.20 mg g -1 . The adsorption kinetics was found to follow pseudo-second-order kinetic model. Thermodynamics parameters, ΔHO, ΔGO and ΔSO, were calculated, indicating that the adsorption of Ni 2+ onto Fe@G was spontaneous and endothermic in nature.

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Magnetite nanoparticles for removal of heavy metals from aqueous solutions: synthesis and characterization

Cited by 230 publications

References 50 publications

Magnetite (Fe₃O₄) Nanoparticles Alleviate Growth Inhibition and Oxidative Stress Caused by Heavy Metals in Young Seedlings of Cucumber (Cucumis Sativus L)

Magnetite (Fe₃O₄) Nanoparticles Alleviate Growth Inhibition and Oxidative Stress Caused by Heavy Metals in Young Seedlings of Cucumber (Cucumis Sativus L)

CHARACTERIZATION AND SURFACE REACTIVITY OF NATURAL AND SYNTHETIC MAGNETITES: II. ADSORPTION OF Pb(II) AND Zn(II)

Adsorption of Ni²⁺from aqueous solution by magnetic Fe@graphite nano-composite

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Magnetite nanoparticles for removal of heavy metals from aqueous solutions: synthesis and characterization

Cited by 230 publications

References 50 publications

Magnetite (Fe3O4) Nanoparticles Alleviate Growth Inhibition and Oxidative Stress Caused by Heavy Metals in Young Seedlings of Cucumber (Cucumis Sativus L)

Magnetite (Fe3O4) Nanoparticles Alleviate Growth Inhibition and Oxidative Stress Caused by Heavy Metals in Young Seedlings of Cucumber (Cucumis Sativus L)

CHARACTERIZATION AND SURFACE REACTIVITY OF NATURAL AND SYNTHETIC MAGNETITES: II. ADSORPTION OF Pb(II) AND Zn(II)

Adsorption of Ni2+from aqueous solution by magnetic Fe@graphite nano-composite

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Product

Resources

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Magnetite (Fe₃O₄) Nanoparticles Alleviate Growth Inhibition and Oxidative Stress Caused by Heavy Metals in Young Seedlings of Cucumber (Cucumis Sativus L)

Magnetite (Fe₃O₄) Nanoparticles Alleviate Growth Inhibition and Oxidative Stress Caused by Heavy Metals in Young Seedlings of Cucumber (Cucumis Sativus L)

Adsorption of Ni²⁺from aqueous solution by magnetic Fe@graphite nano-composite