Radiation crosslinked poly (vinyl alcohol)/acrylic acid copolymer for removal of heavy metal ions from aqueous solutions

Al-Qudah, Yahya H.F.; Mahmoud, Ghada A.; Khalek, Mohamed Abdel

doi:10.1016/j.jrras.2013.12.008

Cited by 62 publications

(38 citation statements)

References 29 publications

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“…Figure 2(a) shows the effect of different composition of P (DMAEMA/AAc) hydrogel on gel fraction, which decreases from 98% with increasing DMAEMA percent reaching a minimum at 80/20 composition. This is due to the decrease of -C=C-groups in AAc which reduces the formation of free radicals during irradiation, leading to a decrease in the crosslinking density as well as the gel fraction [3].…”

Section: Resultsmentioning

confidence: 99%

“…In addition, they have been used for removing heavy metal ions from wastewater due to three-dimensional network structures and their ability of joining different functional groups. These ionisable groups, such as carboxylic when ionized, produce fixed ions that repel one another, and this repulsion leads to greatly enhanced swelling of the network [3].…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Some Hydrogels Used in Water Purification: Correlation of Swelling and Free-Volume Properties

Moh́sen¹,

Maziad²,

Gomaa³

et al. 2015

OJOPM

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In this study, the main objective is to develop a good chelation and ion exchange hydrogel. This hydrogel is obtained by polymerization of dimethyl amino ethyl methacrylate (DMAEMA) and acrylic acid (AAc) by gamma irradiation, for the purpose of separation of some heavy and toxic metals from water. UV spectroscopy is applied to determine the metal ion concentration before and after treatment. The FTIR spectral analysis has identified the bond structure of PAAc, DMAEMA and P (DMAEMA/AAc) hydrogels. Microstructure and nanostructure are investigated by means of SEM and positron annihilation lifetime spectroscopy (PALS) respectively. A maximum swelling percent is found for 80/20 DMAEMA/AAc at free-volume hole size and fraction of 97 Ǻ 3 and 3.4% respectively. The P (DMAEMA/AAc) and PAAc hydrogels have been applied for Cu +2 , Co +2 and Ni +2 removals from aqueous solutions, and the factors affecting the adsorption capacity are determined. The adsorption capacity of P (DMAEMA/AAc) is found to be higher than the corresponding ones PAAc. Its experimental results showed that, the maximum adsorption of P (DMAEMA/AAc) after 24 h occurs at pH 7 with concentration of 250 ppm for Ni +2 ions and at pH 5 with concentration of 40 ppm for Cu +2 and Co +2 ions. The adsorption affinity of P (DMAEMA/AAc) hydrogel at different treatment contact times is in the following order Ni > Cu > Co. However, the order becomes Co > Ni > Cu by the variation of the pH of the metal ion solution; the variation of its concentration leads to a different order of Cu > Co > Ni.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characterization of Some Hydrogels Used in Water Purification: Correlation of Swelling and Free-Volume Properties

Moh́sen¹,

Maziad²,

Gomaa³

et al. 2015

OJOPM

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“…Hydrogels sensitive to environmental changes have immense potential in various applications [93]. These materials have intensively been studied in the past years for their application in the field of biology and medicine [94], controlled [95] and targeted drug delivery [96], environmental protection [97] and many other applications [98][99][100]. Of all the stimuli mentioned above, the impact of temperature has been studied the most.…”

Section: (1) (2018) 79-91mentioning

confidence: 99%

Hydrogels based on N-isopropylmethacrylamide and N-isopropylacrylamide

Urošević¹,

Nikolić²,

Ilić‐Stojanović³

et al. 2018

Adv Techol

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Hydrogels are three-dimensional polymer networks which have the capacity to retain a large quantity of water or biological fluids in the swollen state. Thermosensitive hydrogels have received special attention of reserachers since they represent a parameter which frequently changes in chemical, biological and physiological systems. Thermosensitive hydrogels have the critical solution temperature, i.e. they exhibit a substantial change in volume with the temperature change. Homopolymers poly(N-isopropylmethacrylamide) (poly(NIPMAM)) and poly(N-isopropylacrylamide) (poly(NIPAM)) are thermosensitive materials which have lately become the subject of intensive study. Monomer N-isopropylmethacrylamide, NIPMAM, enters into copolymerization with monomer N-isopropylacrylamide, NIPAM, in order to create a system with a phase transition temperature approximate to the human body temperature. In literature data there is available information on the synthesis and characterization of microgels, nanogels and copolymers based on NIPMAM and NIPAM. These thermosensitive polymer materials are used in controlled drug delivery and protein immobilization.

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“…[3] Among these various methods, adsorption of heavy metals by chelating hydrogels is widely investigated and has had many interesting achievements. [3][4][5][6][7][8][9] Metal ion chelating polymers, called polychelatogens, contain one or more electron-donor groups (Lewis bases) such as vinyl pyridine, [3] N-methacryloylhistidine, [4] N-vinyl imidazole, [10,11] benzo-18-crown-6-acrylamide, [12] polyethyleneimine, [13] dithiocarbamate, [14] thiazolidine and benzothiazole, [15,16] 8-hydroxyquinoline, [17] and acrylic acid [18] that can form coordination bonds with most of the toxic heavy metal ions (Lewis acids). In the current study, 2-hydroxyethyl methacrylate (HEMA) as a two-dentate chelating co-monomer was used for enhancing heavy metal removal properties of salep-g-polyacrylamide hydrogel.…”

Section: Introductionmentioning

confidence: 99%

Novel salep-based chelating hydrogel for heavy metal removal from aqueous solutions

Soleyman

Pourjavadi

Monfared

et al. 2016

Polym. Adv. Technol.

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A novel optimized chelating hydrogel was synthesized via graft copolymerization of acrylamide and 2-hydroxyethyl methacrylate (as two-dentate chelating co-monomer) onto salep (a multicomponent polysaccharide obtained from dried tubers of certain natural terrestrial orchids) using N,N′-methylenebisacrylamide as a crosslinker and ammonium persulfate as an initiator. Reaction parameters (N,N′-methylenebisacrylamide and ammonium persulfate amounts as well as acrylamide/2-hydroxyethyl methacrylate weight ratio) affecting the water absorption of the chelating hydrogel were optimized using a systematic method to achieve a hydrogel with high swelling capacity as possible. Heavy metal ion adsorption capacity of the optimized hydrogel for metal ions [Cu (II), Pb (II), Cd (II), and Cr (III)] were investigated in aqueous media containing different concentrations of these ions (5-50 ppm). The results showed that the hydrogel have great potential for heavy metal removal from aqueous solutions. The hydrogel formation was confirmed by Fourier transform infrared spectroscopy, and surface morphology study of the hydrogel was performed by scanning electron microscope.

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Radiation crosslinked poly (vinyl alcohol)/acrylic acid copolymer for removal of heavy metal ions from aqueous solutions

Cited by 62 publications

References 29 publications

Characterization of Some Hydrogels Used in Water Purification: Correlation of Swelling and Free-Volume Properties

Characterization of Some Hydrogels Used in Water Purification: Correlation of Swelling and Free-Volume Properties

Hydrogels based on N-isopropylmethacrylamide and N-isopropylacrylamide

Novel salep-based chelating hydrogel for heavy metal removal from aqueous solutions

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