Adsorptive features of chitosan entrapped in polyacrylamide hydrogel for Pb2+, UO22+, and Th4+

Akkaya, Recep; Ulusoy, Uğur

doi:10.1016/j.jhazmat.2007.05.084

Cited by 153 publications

(49 citation statements)

References 27 publications

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“…To eliminate heavy metal ions from aquatic streams, numerous physicochemical and biological techniques including chemical oxidation and reduction, adsorption, ion exchange, reverse osmosis, membrane separation and electrochemical treatments have been extensively applied. [1][2][3][4][5] Among these techniques, adsorption is recognized as the most effective method due to its high selectivity, easy manipulation and environmental issues.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a poly(amidoxime-hydroxamic acid) cellulose derivative and its application in heavy metal ion removal

et al. 2017

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Amidoxime and hydroxamic acid functional groups have comparable chelating ability with synthetic resins, but the synthesis of cellulose fibers bearing amidoxime and hydroxamic acid functional groups using simple and effective strategies have yet to be developed. In this study, a poly(amidoxime-hydroxamic acid) cellulose derivative (pAHA-cellulose) was prepared via free radical polymerization followed by an oximation reaction. A series of microscopic analyses and spectral tests proved that the pAHA-cellulose was covered with uniform amidoxime and hydroxamic acid functional groups. The use of pAHAcellulose towards heavy metal ion removal was investigated and an uptake equilibrium was achieved within 60 min for Cu 2+ and Zn 2+ , and 120 min for Pb 2+ and Cr 3+, through a chelation mechanism. The adsorption behavior followed the pseudo-second-order kinetic model and Langmuir isotherm with and Zn 2+ , respectively. Regeneration of pAHA-cellulose did not significantly influence the adsorption towards metal ions for up to five sequential cycles. Considering the simple and efficient grafting process, excellent adsorbability and prominent renewability, pAHA-cellulose is believed to be a new and feasible candidate for heavy metal ion removal from aqueous solution.

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Section: Introductionmentioning

confidence: 99%

Synthesis of a poly(amidoxime-hydroxamic acid) cellulose derivative and its application in heavy metal ion removal

et al. 2017

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“…Heavy metals are commonly discharged into the environment from mining activities, fossil fuels, battery manufacturing, automobile emissions (Ozay et al 2009), metal plating, or electric device fabrication (Denizli et al 2005). To eliminate metallic cations from wastewater, numerous conventional techniques including chemical precipitation, ion exchange, reverse osmosis, membrane separation, electrochemical treatments, and solvent extraction have been extensively applied (Akkaya and Ulusoy 2008;Jang et al 2008;Zhao and Mitomo 2008). Activated carbon adsorption of toxic metal ion-containing waste, followed by precipitation, improved metal ion removal considerably (Narayanan and Mahesh 2009).…”

Section: Introductionmentioning

confidence: 99%

Poly(amidoxime) from Polymer-Grafted Khaya Cellulose: An Excellent Medium for the Removal of Transition Metal Cations from Aqueous Solution

Rahman¹,

Sarkar²,

Yusoff³

et al. 2016

BioResources

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A free radical chain initiation reaction was exploited to prepare poly(acrylonitrile)-grafted Khaya cellulose. The synthesis of the poly(amidoxime) ligand was also performed using oximation reactions. Transition metal cations formed some complexes with the polymeric ligand. The pH of the solution played an important role in the optical detection of Cu 2+ ions. The highest absorbance (approximately 94%) of the [Cu-ligand] n+ complex was at pH 6. The sorption quantity increased with increasing Cu 2+ ion concentration, which was reflected by a broad peak at 600 nm that was attributed to the charge transfer (- transition) process. The equilibrium sorption capacity of 282 mg/g, with faster adsorption rates (t1/2 = 8 min), suggested that copper possessed excellent adsorption capacity compared with the other cations (Fe 3+ , Co 3+ , Cr 3+ , Ni 2+ , and Zn 2+ ). The sorption data for all of the cations followed the Freundlich isotherm model, with a high coefficient of determination, reflecting a heterogeneous sorption process by the cellulose-based, poly(amidoxime) adsorbent. The feasibility for recycling of adsorbent was evaluated by the sorption/ desorption study, and the results suggest that a new type adsorbent can be reused in seven cycles without any significant loss in its original sensing and removal performances.

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“…Therefore, these heavy metals can be considered as one of the most important pollutants for waters and waste waters. To remove heavy metal ions from various environments, the techniques such as precipitation, adsorption, ion exchange, reverse osmosis, electrochemical treatments, hyperfiltration, membrane separation, evaporation, coagulation, flotation, oxidation, and biosorption processes are widely used [11][12][13][14][15][16]. The most widely used for many decades is adsorption method where hydrogels and super absorbed hydrogels are used.…”

Section: Introductionmentioning

confidence: 99%

Removal of heavy metal ions from aqueous solutions by radiation‐induced chitosan/(acrylamidoglycolic acid‐co‐acrylic acid) magnetic nanopolymer

Fadl

El‐Mohdy

2015

Polymer Engineering & Sci

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An effective method was developed to isolate toxic heavy metal ions from the aqueous solution by the magnetic nanopolymers. The magnetic sorbent was prepared with radiation-induced crosslinking polymerization of chitosan (CS), 2-acrylamido-glycolic acid (AMGA), and acrylic acid (AAc), which stabilized by magnetite (Fe 3 O 4 ) as nanoparticles. The formation of magnetic nanoparticles (MNPs) into the hydrogel networks was confirmed by Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, and Scanning electron microscopy, which revealed the formation of MNPs throughout the hydrogel networks. The swelling behavior of the hydrogels and magnetic ones was evaluated at different pH values. The adsorption activity for heavy metals such as Cu 21 and Co 21 by nonmagnetic and magnetic hydrogels, Fe 3 O 4 /CS/ (AMGA-co-AAc), in terms of adsorption amount was studied. It was revealed that hydrogel networks with magnetic properties can effectively be used in the removal of heavy metal ions pollutants and provide advantageous over conventional ones.

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Adsorptive features of chitosan entrapped in polyacrylamide hydrogel for Pb2+, UO22+, and Th4+

Cited by 153 publications

References 27 publications

Synthesis of a poly(amidoxime-hydroxamic acid) cellulose derivative and its application in heavy metal ion removal

Synthesis of a poly(amidoxime-hydroxamic acid) cellulose derivative and its application in heavy metal ion removal

Poly(amidoxime) from Polymer-Grafted Khaya Cellulose: An Excellent Medium for the Removal of Transition Metal Cations from Aqueous Solution

Removal of heavy metal ions from aqueous solutions by radiation‐induced chitosan/(acrylamidoglycolic acid‐co‐acrylic acid) magnetic nanopolymer

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