Remediation of copper ions from aqueous solution using hybrid magadiite: kinetics, isotherm and mechanism of removal

Abstract

This paper deals with the potential use of hybrid magadiite composite as an alternative adsorbent for the removal of copper ions. Na-magadiite was synthesized by the hydrothermal method. The hybrid magadiite was prepared by using pyrazolone as an organic ligand via dry impregnation technique from Na-magadiite. The hybrid magadiite composite is used in the removal of copper ions in sulphate media. The presence of an organic molecule in hybride magadiite is verified by thermogravimetric analysis and infrared spectroscopy. The X-ray diffraction pattern illustrates the intercalation of the organic ligand into Na-magadiite interlayers and the preservation of the structure after intercalation. The scanning electron micrograph images of modified Na-magadiite show the expansion of the basal spacing resulted in a breakup of the spherical nodules and the concomitant parallel arrangement of the platelets. In batch experiments, the influence of reaction time, kinetics, pH and the initial concentration of copper(II) were investigated. In the case of modified Na-magadiite, the kinetic model of extraction adapted is pseudo-second order. The metallic cation was extracted at a very low pH 1.9, and the capacity obtained is 330 mmol/kg, the complex formed is of the CuL 2 type.

Preparation, characterization and application of Fe-pillared bentonite to the removal of Coomassie blue dye from aqueous solutions

“…The infrared spectra of the raw clay Bent-Raw, sodium clay Bent-Na and pillared clay PILC-Fe are shown in Fig. 2; the spectra of (Bent-Raw) indicate the presence of a peak at 3620 cm −1 corresponding to the isolated -OH groups that belong to silanol Si-OH and Al-OH of the bentonite inner-surface and a wide band centered at 3580 cm −1 attributed to germinal and adjacent silanol groups [46,47]. These bands disappeared in the PILC-Fe which can be attributed to the polymerization of the germinal and the adjacent groups and the formation of the siloxane groups (Si-O-Si) due to the calcination step.…”

Adsorption Isotherm and Kinetic Modeling of the Congo Red (CR) and Indigo Carmine (IC) Dyes Removal onto Novel Bentonite Hybrid Material

“…These bands are commonly found in organo‐clays containing alkylamine surfactants [16] . Furthermore, the characteristic stretching vibration bond of isolated hydroxyl groups of Si−OH is observed at 3623 cm −1 , however, the appearance of the band between 3540 and 3200 cm −1 is attributed to the valence vibrations of adjacent and geminy polymeric hydroxyl groups [6a] . As can be observed from the spectra of bentonite and hybrid Bentonite that the region between 3650 and 3200 cm −1 , which is characterized by different OH − group is still unchanged.…”

“…The characteristic absorption bands of the clay phase are those corresponding to Si−O, Si−O−M, M−O−H where M stands for Al, Fe and Mg. These chemical elements are found between the anions and cations located in the octahedral and tetrahedral sheets with a large number of OH − groups [6a,14,17] . It should also be mentioned that the appearance of bands attributed to the surfactants in the modified clays is in the range of 2849–2914 cm −1 corresponding to the anti‐symmetrical and symmetrical stretching vibration modes of the CH bonds in a CH 2 or CH 3 environment.…”

Progress in Development of Magadiite to Produce Multifunctional Lamellar Materials

“…Due to their adsorption and absorption capacity, magadiites can be applied in the environmental area, but few reports are found in the literature. ,, In this regard, different systems using inorganic–organic hybrid magadiites have been studied to determine their maximum adsorption capacity for potentially toxic metal cations present in aqueous solutions (Figure ). As examples, hybrids modified with ethylene sulfide were able to retain 1.44 mmol g –1 of Pb 2+ , magadiite with Cyanex 272 present in its interlayer space was able to adsorb 0.44 mmol g –1 of Cd 2+ , alginate-based composites retained 197 and 44 mg g –1 of Pb 2+ and Ni 2+ , respectively, Na-magadiite with pyrazolone removed 330 mmol kg –1 of Cu 2+ , and a TiO 2 pillared magadiite removed up to 100% of As 5+ (considering an initial concentration of 0.5–1.0 mg L –1 ) . In addition to the potential adsorption of metal species, magadiites modified with chitosan were used to remove dyes and had a maximum adsorption capacity of 135.77 and 45.25 mg g –1 for Congo Red and Methylene Blue, respectively .…”