Preparation of cross-linked magnetic chitosan-phenylthiourea resin for adsorption of Hg(II), Cd(II) and Zn(II) ions from aqueous solutions

Monier, M.; Abdel-Latif, D.A.

doi:10.1016/j.jhazmat.2012.01.015

Cited by 252 publications

(102 citation statements)

References 41 publications

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“…The ion selectivity observed for Cu 2+ was higher especially for higher 0.9 mol% pAAm content and this might be attributed to the smaller ionic radius of Cu 2+ ions (0.71Ǻ) than other metal ions, affinity of Coordination (formation of inner sphere complexes) with the carboxylic acid groups [44], or may also be due to the Jahn-Teller effect which is mastery for copper complexes [45,46].…”

Section: Adsorption Of Competitive Ionsmentioning

confidence: 98%

Adsorption Characteristics of Copper (II) Ions from Aqueous Solution onto Ionic Cross-linked Pva/P(Aam-Nipaam) Core-shell Nanogels

Sarhan¹

2015

J Nanomed Nanotechnol

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Core-shell nanogels adsorbent were investigated for copper (II) removal from aqueous solution, consisting of poly(vinyl alcohol) (PVA) core and poly(acrylamide-N-isopropylacrylamide/) p(AAm-NIPAm) shell particles. Various factors affecting the adsorption capacity, such as swelling, pH, time, initial ion concentration, and different metal ions on the metal ion binding capacity for nanogel, was also tested. The selectivity of the nanogels toward the different metal ions tested was Cu 2+ > N i2+ > Pb 2+ . The results show that the adsorption of nanogels mainly depends on pH, and the maximum adsorption was obtained at a pH of 6.0. The adsorption capacity of Cu +2 was 126 mg/g obtained under simple and fast experimental conditions, the effect of different mole ratios of p(AAm-NIPAm) shells thickness were synthesized, to determine the maximum metal uptake. The core-shell nanogels were characterized by fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and transmission electron microscope (TEM). It was found that adsorbed Cu +2 ions on PVA/p(AAm-NIPAm) nanogels can be effectively desorbed by acid stripping with 0.1 mol/L HCl resulted in 96% Cu +2 recovery for the nanogels; this shows the ability of the nanogels to be reused, upon drying between treatments. The nanogels adsorbent can be regenerated after releasing of Cu +2 and reused three times effectively. All the experimental result exhibited good matches with the Freundlich isotherm and followed pseudo-second-order kinetics. The mechanism of adsorption of Cu +2 onto PVA/p(AAm-NIPAm) nanogels is proposed.

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Section: Adsorption Of Competitive Ionsmentioning

confidence: 98%

Adsorption Characteristics of Copper (II) Ions from Aqueous Solution onto Ionic Cross-linked Pva/P(Aam-Nipaam) Core-shell Nanogels

Sarhan¹

2015

J Nanomed Nanotechnol

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“…Adsorption capacity (mg g À1 ) (A) Magnetic chitosan-thioglyceraldehyde (Monier, 2012) 98 ± 2 Magnetic chitosan-phenylthiourea (Monier and Abdel-Latif, 2012) 135 ± 3 Magnetic silica nanocomposites (Song et al, 2011a) 19.79 Polyrhodanine-encapsulated magnetic nanoparticles (Song et al, 2011b) 179 Multi-cyanoguanidine modified magnetic chitosan 285 Thiourea modified magnetic chitosan (Donia et al, 2008) 560 AT-MDAS (this work) 310 …”

Section: Absorbentmentioning

confidence: 99%

“…As the burgeoning materials, varies magnetic organic-inorganic nano-composites have been reported and shown remarkable potential in the field of heavy metal removal because their high surface area, enhanced active sites and abundant functional groups on the surface (Zhu et al, 2010;Musico et al, 2013;Wang et al, 2011). For instance, nano-composite that used synthetic polymer, including polypyrrole, polyaniline, polyacrylonitrile, and natural polymer, represented with chitosan as the organic shell, were found to be highly efficient absorbents (Wang et al, 2012b;Monier and Abdel-Latif, 2012;Zhu et al, 2012;Liu et al, 2009). Musico et al reported the polymer-based graphene oxide nano-composite showed improved removal of lead ion (Musico et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of monodisperse functional magnetic dialdehyde starch nano-composite and used for highly effective recovery of Hg(II)

et al. 2015

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“…At low pH, most of the functional groups on adsorbent surface (such as -NH 2 and -OH) are protonated and presented in the positively charged form, which reduce the number of active binding sites [28]. Also, the electrostatic repulsion between Hg(II) and the positively charged functional groups may prevent the adsorption of Hg(II) onto the surface of the adsorbents [29,30]. Therefore, the adsorption of Hg(II) in acidic solution was unfavorable.…”

Section: Optimization Of the Adsorption Phmentioning

confidence: 99%

Synthesis of peanut shell/polyacrylonitrile copolymer via Cu(0)-mediated RDRP and its adsorption behavior after modification

et al. 2015

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Peanut shell (PNS) was used to prepare a novel adsorbent to achieve resource recovery of the agricultural residue. The hydroxyl groups of peanut shell were turned into -C(CH 3 ) 2 -Br pendant groups to initiate polymerization of acrylonitrile. Graft copolymer peanut shell/polyacrylonitrile (PNS-g-PAN) was modified by hydroxylamine hydrochloride to transform the cyano groups into amidoxime (AO) groups. The modified copolymer of AO-PNS-g-PAN was used as adsorbent. The maximum adsorption capacity for Hg(II) was 4.45 mmol g -1 . The adsorption process fitted well the Freundlich isotherm model and followed pseudo-second-order model. The modified copolymer demonstrated its potential as an efficient adsorbent to solve the problem of Hg(II) contamination. Graphical abstract The peanut shell (PNS) macroinitiator was obtained by acylation of hydroxyl groups on the cellulose backbone of the peanut shell and initiated by Cu(0)-mediated RDRP of acrylonitrile. PNS-g-PAN was modified by NH 2 OHÁHCl and used to remove heavy metal ions. The maximum adsorption capacity of Hg(II) was 4.45 mmol g -1 .

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Preparation of cross-linked magnetic chitosan-phenylthiourea resin for adsorption of Hg(II), Cd(II) and Zn(II) ions from aqueous solutions

Cited by 252 publications

References 41 publications

Adsorption Characteristics of Copper (II) Ions from Aqueous Solution onto Ionic Cross-linked Pva/P(Aam-Nipaam) Core-shell Nanogels

Adsorption Characteristics of Copper (II) Ions from Aqueous Solution onto Ionic Cross-linked Pva/P(Aam-Nipaam) Core-shell Nanogels

Facile synthesis of monodisperse functional magnetic dialdehyde starch nano-composite and used for highly effective recovery of Hg(II)

Synthesis of peanut shell/polyacrylonitrile copolymer via Cu(0)-mediated RDRP and its adsorption behavior after modification

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