Efficient adsorption of Ag(І) and Au(ІІІ) on modified magnetic chitosan with amine functionalities

Donia, Ahmed M.; Yousif, Ahmed M.; Atia, Asem A.; Elsamalehy, Mona F.

doi:10.1080/19443994.2013.794706

Cited by 20 publications

(6 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Chitosan can be used to coat magnetic nanoparticles to prepare magnetic nano-adsorbents because the functional groups of chitosan, including amine and hydroxyl groups are effective in adsorbing heavy metal ions and dyes (Donia, Yousif, Atia, & Elsamalehy, 2014;Liu, Hu, Fang, Zhang, & Zhang, 2009). Moreover, chemical modification of chitosan successfully improved the adsorption efficiency of magnetic nanoparticles (Hritcu, Humelnicu, Dodi, & Popa, 2012;Kuang, Wang, Liu, & Wu, 2013;Ren, Abbood, He, Peng, & Huang, 2013;Wang, Peng, Yang, Liu, & Hu, 2011;Zhu, Hu, & Wang, 2012).…”

Section: Introductionmentioning

confidence: 99%

Combination of carboxymethyl chitosan-coated magnetic nanoparticles and chitosan-citrate complex gel beads as a novel magnetic adsorbent

Chen

2015

Carbohydrate Polymers

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Combination of carboxymethyl chitosan-coated magnetic nanoparticles and chitosan-citrate complex gel beads as a novel magnetic adsorbent

Chen

2015

Carbohydrate Polymers

View full text Add to dashboard Cite

“…CTS has been applied in wastewater treatment because of high adsorptivity and selectivity for metal ions; however, these applications are limited because of the higher cost and poor chemical stability of CTS in acidic solutions. In addition, CTS has been used in the form of membranes for Ag + adsorption in aqueous solution, − but according to the literature, Fan et al believed that the specific surface area of microsized particles are more effective than those of membranes for adsorption. Therefore, SIIT has been used by chemical coating the CTS onto the surfaces of microsized particles, and the chemical stability and specific surface area of the CTS can be exploited.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of Ion-Imprinted Hollow Particles for the Selective Adsorption of Silver Ions

Hou

2015

Langmuir

View full text Add to dashboard Cite

Four kinds of silver ion-imprinted particles (Ag-IIPs) with different morphologies were prepared by the surface ion-imprinting technology (SIIT) and were used for the selective removal and concentration of silver ions from wastewater. The favorable adsorptivity and selectivity of Ag-IIPs for Ag(+) were confirmed by a series of adsorption experiments at a suitable pH value. The adsorption mechanism was elucidated by analyzing the adsorption isotherms, adsorption thermodynamics, and adsorption kinetics systematically. The Ag(+) adsorption onto the Ag-IIPs was well-described by the Langmuir isotherm model, and it was likely to be a monolayer chemical adsorption. This conclusion was also confirmed by the thermodynamic parameters. Moreover, the adsorption kinetics indicated that the adsorption rate would be controlled jointly by the intraparticle diffusion and the inner surface adsorption process, and the latter process was generally associated with the formation and breaking of chemical bonds. Finally, the effects of different morphologies of the Ag-IIPs for Ag(+) adsorption were also investigated. In aqueous solution, the adsorptivity of the Ag(+) ion-imprinting single-hole hollow particles (Ag-IISHPs) for Ag(+) was highest (80.5 mg g(-1)) because of a specific morphology that features a single hole in the shell. In an oil-water mixture, Ag(+) in the water phase could be adsorbed efficiently by the Ag(+) ion-imprinting Janus hollow particles (Ag-IIJHPs), with emulsifiability originating from the Janus structure.

show abstract

“…It can be seen clearly that the adsorption capacity increased with the pH increasing from 1.0 to 4.0 and reached a plateau value with pH range from 5.0 to 7.0. This phenomenon could be explained by the complex mechanism between Ag(I) and the donor atom (N) on surface of sample [30], which is relevant to interface protonation of the -NH 2 groups of MEG-NH 2 nanohybrids in the aqueous solution. From Figure 7 we can also see that the surface of MEG-NH 2 nanohybrids Journal of Nanomaterials is positively charged in the pH ranges of 1.0 to 4.0.…”

Section: Morphological and Structural Studies Of Meg-nhmentioning

confidence: 99%

“…Concentrations. The effect of initial Ag(I) concentration (10,20,30,40, and 50 mg⋅L −1 ) in the solution on the adsorption of MEG-NH 2 nanohybrids is shown in Figure 8. With the increase of initial concentration, the adsorption capacity and removal rate presented opposite variation tendency.…”

Section: Effect Of Different Initialmentioning

confidence: 99%

Fabrication of Amino Functionalized Magnetic Expanded Graphite Nanohybrids for Application in Removal of Ag(I) from Aqueous Solution

Ruan

Xing

et al. 2017

Journal of Nanomaterials

View full text Add to dashboard Cite

Ethylenediamine functionalized magnetic expanded graphite decorated with Fe3O4 nanoparticles (MEG-NH2) was fabricated by one-pot solvothermal method. The as-prepared MEG-NH2 nanohybrids were characterized by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectra (FTIR), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), vibrating sample magnetometer (VSM), and Zeta potential analyzer. The effects of Fe3O4 content in MEG-NH2 nanohybrids, pH, initial concentration, contact time, and dosage on adsorption properties of the MEG-NH2 nanohybrids for Ag(I) from aqueous solution were investigated by batch experiments. The pseudo-first-order and the pseudo-second-order kinetic models were utilized to study adsorption kinetics. The experimental data was also analyzed with Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich isotherm models. The results show that Ag(I) was reduced to silver in the process of the adsorption by MEG-NH2 nanohybrids; the experimental data was better fitted to pseudo-second-order model and Langmuir isotherm model which revealed that the adsorption process was a chemical adsorption by the formation of silver on the surface of MEG-NH2 nanohybrids.

show abstract

Efficient adsorption of Ag(І) and Au(ІІІ) on modified magnetic chitosan with amine functionalities

Cited by 20 publications

References 38 publications

Combination of carboxymethyl chitosan-coated magnetic nanoparticles and chitosan-citrate complex gel beads as a novel magnetic adsorbent

Combination of carboxymethyl chitosan-coated magnetic nanoparticles and chitosan-citrate complex gel beads as a novel magnetic adsorbent

Preparation and Properties of Ion-Imprinted Hollow Particles for the Selective Adsorption of Silver Ions

Fabrication of Amino Functionalized Magnetic Expanded Graphite Nanohybrids for Application in Removal of Ag(I) from Aqueous Solution

Contact Info

Product

Resources

About