Low-cost aluminum and iron oxides supported on dioctahedral and trioctahedral smectites: A comparative study of the effectiveness on the heavy metal adsorption from water

Franco, Francisco; Benítez‐Guerrero, Mónica; Gonzalez-Triviño, I.; Pérez-Recuerda, R.; Assiego, C.; Cifuentes-Melchor, J.; Pascual‐Cosp, José

doi:10.1016/j.clay.2015.10.035

Cited by 33 publications

(17 citation statements)

References 44 publications

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“…The physicochemical properties of the clay minerals can be modified by several methods such as the insertion of polyoxocations and pillars [13,14] or by means of acid treatment [15][16][17][18][19], increasing the specific surface area and the pore volume of the clays minerals. Franco et al have shown that, except for Hg(II), the Fe(III)-homoionic smectites display higher metal adsorption properties than that of activated carbon used previously [20]. Recently, it has been established the effectiveness of microwave-assisted acid treatment, obtaining a high modification in their textural properties in short irradiation times [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Structure and Experimental Surfaces Modifications of 2:1 Clay Minerals on the Adsorption Properties of Methylene Blue

et al. 2018

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In this work the adsorption capacities of methylene blue on Mg-smectite and sepiolite and its derived material obtained after acid treatment and/or the addition of Fe at its surfaces are studied. Natural smectite with high Mg-content in its octahedral sheet (Mg-smectite) displays higher adsorption capacity than the sepiolite due to the ability of Mg-smectite to expand the basal spacing to accommodate methylene blue cations between adjacent layers and the inability of sepiolite to adsorb these cations within the structural channels. The acid-activation of Mg-smectite causes a clear decrease in the adsorption capacity attributed to the partial loss of the interlayer positions by the loss of the octahedral sheet and subsequent formation of amorphous silica. Moreover, the adsorption of the Mg-smectite decreases even more when iron oxohydroxides species are incorporated in its interlayer spacing making inaccessible the interlayer active sites for the adsorption of methylene blue cations. On the contrary, the microwave-assisted acid treatment of sepiolite causes a slight increase in the adsorption capacity related with the dispersion of fibers. Nevertheless, contrary to that observed with Mg-smectite, higher increasing of adsorption capacities are obtained after the formation of new adsorption centers due to the incorporation of iron oxohydroxides species at the external surfaces of sepiolite.

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Section: Introductionmentioning

confidence: 99%

Influence of the Structure and Experimental Surfaces Modifications of 2:1 Clay Minerals on the Adsorption Properties of Methylene Blue

et al. 2018

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“…1a), with irregular edges suggesting a heterogeneous surface with almost noncompact structure. The extremely thin lamellar particles forming the montmorillonitic tactoids, [12] are featured under a higher magnification (20 000×) as shown in (Fig. 1b).…”

Section: Scanning Electron Micrographmentioning

confidence: 90%

Validity of Egyptian Na‐montmorillonite for adsorption of Pb²⁺, Cd²⁺ and Ni²⁺ under acidic conditions: characterization, isotherm, kinetics, thermodynamics and application study

Taha

Shreadah

Heiba

et al. 2017

Asia-Pacific J Chem Eng

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This study investigated the applicability of natural Egyptian Na-montmorillonite (Na-MMT) to remove Pb 2+ , Cd 2+ and Ni 2+ under acidic conditions that mimic industrial wastewater acidity. Cation exchange capacity of Na-MMT was found 91 meq/100 g and the specific surface area 42 m 2 g À1 . The adsorbent was characterized using X-ray fluorescence, scanning electron micrograph that showed significant morphological changes after adsorption and Fourier transform infrared spectroscopy, which confirmed that the adsorption occurred mainly in the lattice region. Removal efficiency was evaluated as a function of pH, contact time, initial concentration, and adsorbent mass. Acidic pH value was chosen for the following experiments. Langmuir and Freundlich isotherm models were applied. Freundlich model showed better fitting suggesting heterogeneous adsorption scenario. Freundlich capacity values decreased in the order of Pb 2+ (3.71 mg g À1 ) > Cd 2+ (2.45 mg g À1 ) > Ni 2+ (1.76 mg g À1 ). Kinetic data were accurately fitted to pseudo-second-order, indicating the adsorption occurrence in the interior surface of Na-MMT and the contribution of internal diffusion mechanism was significant. Intraparticle diffusion model gave multi-linear curves so more than onestep controlled the adsorption process. Under temperature range 290-328 K, thermodynamic parameters revealed that adsorption of Pb 2+ and Cd 2+ was spontaneous but Ni 2+ non-spontaneous. Adsorption was exothermic for Pb 2+ and Ni 2+ but endothermic for Cd 2+ . Arrhenius activation energy values were 5.78, 8.51 and 11.45 kJ mol À1 for Pb 2+ , Cd 2+ and Ni 2+ respectively stating the physical adsorption. Na-MMT reusability was confirmed by regeneration experiments. Application study showed excellent efficiency of Na-MMT within range (23.4-81.2%) removal for Pb 2+ , Cd 2+ and Ni 2+ from textile dyeing and tannery wastewater. *Effect of pH was studied in the pH range 2-7 while keeping other parameters constant at 't = 60 min; C o = 10 mg L À1 ; adsorbent mass = 0.25 g; agitation speed = 100 rpm and T = 298 K'.A. A. TAHA ET AL. Figure 6. Effect of adsorbent mass 'adsorbent mass (0.12-0.500) g, t = 60 min, pH = 3.8, C o = 10 mg/L, agitation speed = 100 rpm and T = 298 K'.Figure 7. Linearized isotherm models (a) Langmuir model and (b) Freundlich model. 'C o = (5-30) mg/L, t = 60 min, pH = 3.8, adsorbent mass = 0.25 g, agitation speed = 100 rpm and T = 298 K'.Figure 8. The linear plots of the pseudo-second-order model for (a) Pb +2 , (b) Cd +2 and (c) Ni +2 . 'C o = (5-20) mg/L, t = (1-60) min, pH = 3.8, adsorbent mass = 0.25 g, agitation speed = 100 rpm and T = 298 K'.Figure 9. Intraparticle diffusion plots for (a) Pb +2 , (b) Cd +2 , and (c) Ni +2 . 'C o = (5-20) mg/L, t = (1-60) min, pH = 3.8, adsorbent mass = 0.25 g, agitation speed = 100 rpm and T = 298 K'.

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“…Another study found that modification of clay minerals with hexadecylammonium bromide (HDTMA) is effective for attenuation of As(III) and As(V) in the presence of Cd(II), Cu(II) and Mn(II) and anions such as glycine, iminodiacetic acid, ethylenediaminetetraacetic acid disodium salt, oxalic acid, phosphate and sulfate [87]. In contrast, Fe-oxide modified smectites (montmorillonite and saponite) have the best adsorption capacity for removal of As (III), Cd(II), Cr(III), Cu(II), Hg(II), Ni(II), Pb(II) and Zn(II) from aqueous solution with at concentration of 10-100 ppb [88]. Mercury is sequestered in Al pillared Clay from Aleg formation, Tunisia at pH 3.2 and 240 min equilibration time [89].…”

Section: Modified Claymentioning

confidence: 99%

Sorption of Heavy Metals on Clay Minerals and Oxides: A Review

Ugwu¹,

Igbokwe²

2019

Advanced Sorption Process Applications

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Low-cost aluminum and iron oxides supported on dioctahedral and trioctahedral smectites: A comparative study of the effectiveness on the heavy metal adsorption from water

Cited by 33 publications

References 44 publications

Influence of the Structure and Experimental Surfaces Modifications of 2:1 Clay Minerals on the Adsorption Properties of Methylene Blue

Influence of the Structure and Experimental Surfaces Modifications of 2:1 Clay Minerals on the Adsorption Properties of Methylene Blue

Validity of Egyptian Na‐montmorillonite for adsorption of Pb²⁺, Cd²⁺ and Ni²⁺ under acidic conditions: characterization, isotherm, kinetics, thermodynamics and application study

Sorption of Heavy Metals on Clay Minerals and Oxides: A Review

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Low-cost aluminum and iron oxides supported on dioctahedral and trioctahedral smectites: A comparative study of the effectiveness on the heavy metal adsorption from water

Cited by 33 publications

References 44 publications

Influence of the Structure and Experimental Surfaces Modifications of 2:1 Clay Minerals on the Adsorption Properties of Methylene Blue

Influence of the Structure and Experimental Surfaces Modifications of 2:1 Clay Minerals on the Adsorption Properties of Methylene Blue

Validity of Egyptian Na‐montmorillonite for adsorption of Pb2+, Cd2+ and Ni2+ under acidic conditions: characterization, isotherm, kinetics, thermodynamics and application study

Sorption of Heavy Metals on Clay Minerals and Oxides: A Review

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Validity of Egyptian Na‐montmorillonite for adsorption of Pb²⁺, Cd²⁺ and Ni²⁺ under acidic conditions: characterization, isotherm, kinetics, thermodynamics and application study