Application of acrylate gel having poly(ethylene glycol) side chains to recovery of gold from hydrochloric acid solutions

Kinoshita, Takehiko; Ishigaki, Yuzo; Nakano, K.; Yamaguchi, Kôichi; Akita, Shigendo; Nii, Susumu; Kawaizumi, Fumio

doi:10.1016/j.seppur.2005.10.007

Cited by 24 publications

(33 citation statements)

References 17 publications

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“…In recent years, it was determined that hydrogels having functional groups such as carboxylic acid, amine, hydroxyl and sulfonic acid groups could be used as complexing agents for the removal of metal ions from aqueous solutions [7,8]. Therefore, a great deal of interest has been observed in relation to the applicability of hydrogels as adsorbent for the removal and separation of metal ions from heavy metal contaminated water [7][8][9][10], and the recovery and pre-concentration of precious metal ions from different media [11,12]. Compared with conventional solid adsorbents like ion exchange and chelating resins, main advantages of such materials are easy loading and, in most cases, stripping of cations with simple chemicals, reusability and the possibility of semi-continuous operation.…”

Section: Introductionmentioning

confidence: 99%

Adsorption characteristics of Cu(II) from aqueous solution onto poly(acrylamide)/attapulgite composite

Chen

Wang

2009

Journal of Hazardous Materials

184

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Section: Introductionmentioning

confidence: 99%

Adsorption characteristics of Cu(II) from aqueous solution onto poly(acrylamide)/attapulgite composite

Chen

Wang

2009

Journal of Hazardous Materials

184

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“…Hydrogel materials with metal binding sites can be useful for water purification and metal remediation. 35,[37][38][39] …”

Section: Resultsmentioning

confidence: 99%

“…33 Hydrogels with chelating ligands have been used for the removal of heavy metal ions (e.g., Cd 2+ , Hg 2+ , Pb 2+ ) from aqueous media 34 and Au 3+ from HCl solution. 35 Hydrogels with metal coordinate cross-links have also been reported. [36][37][38][39] For instance, the combination of lanthanide metals and PEG oligomers with bis(2,6-bis(1′-methylbenzimidazolyl)-4-hydroxypyridine) pendant groups affords luminescent gels.…”

Section: Introductionmentioning

confidence: 99%

Iron Tris(bipyridine) PEG Hydrogels with Covalent and Metal Coordinate Cross-Links

et al. 2008

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Spontaneous gel formation of iron(II) tris(bipyridine)-centered poly(ethylene glycol) methacrylate ([Fe{bpy(PEG-MA)2}3]2+) was observed without the addition of a cross-linking agent. BpyPEG2 macroligands were first modified with methacrylate groups using methacrylic anhydride and then combined with FeSO4 to produce [Fe{bpy(PEG-MA)2}3]SO4. End group analysis by 1H NMR spectroscopy verified quantitative methacrylation of the PEG hydroxyl chain ends. A series of experiments and control reactions were performed to investigate the conditions required for gel formation. Hydrogels of [Fe{bpy(PEG-MA)2}3]SO4 were produced both in the presence and in the absence of a photoinitiator. Controls using MA-PEG-MA also formed hydrogels in the presence of [Fe(bpy)3]2+; however, the addition of a radical scavenger, TEMPO, prevented formation of a polymer network, suggesting radical involvement. Treatment of preformed hydrogels of bpy(PEG-MA)2 with aqueous solutions of FeSO4, CuBr2, and CoCl2 also produced materials with color changes indicative of complexation.

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“…This may be attributed to: (1) relative rigidity of clay-containing hydrogel (P3) and (2) higher internal strain inside P3 (relative to P1) due to the absorption of large quantity of water (or aqueous metal ions). These two factors cause the formation of stretched weak coordinate/covalent bonds between metal ions and active sites and therefore lower values of K L [36].…”

Section: Kineticsmentioning

confidence: 99%

Swelling and metal ion uptake characteristics of kaolinite containing poly [(acrylic acid)-co-acrylamide] hydrogels

Atia

Donia

Hussin

et al. 2009

Desalination and Water Treatment

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To cite this article: Asem A. Atia , Ahmed M. Donia , Rashad A. Hussin & Rama T. Rashad (2009) Swelling and metal ion uptake characteristics of kaolinite containing poly [(acrylic acid)-co-acrylamide] hydrogels, Desalination and Water Treatment, 3:1-3, 73-82, A B S T R A C THydrogels of poly [(acrylic acid)-co-acrylamide], with N,NN-methylene bisacrylamide (MBA) crosslinker and different compositional ratios of kaolinite were prepared and investigated. The swelling characteristics of the hydrogels were investigated in distilled water as a function of clay content. The clay-hydrogel composite of 5.3% clay percentage showed a higher swelling property in distilled water relative to clay-free hydrogel. The swelling ratio was found to be affected by the change in contact time, pH, salt solution and temperature. The adsorption properties of the hydrogels towards Mn(II), Cu(II) and Zn(II) in aqueous solutions were also studied at different conditions. The rate of adsorption followed the pseudo-second-order kinetics. Elution behavior of loaded hydrogel (P3) was also studied in EDTA solution.

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Application of acrylate gel having poly(ethylene glycol) side chains to recovery of gold from hydrochloric acid solutions

Cited by 24 publications

References 17 publications

Adsorption characteristics of Cu(II) from aqueous solution onto poly(acrylamide)/attapulgite composite

Adsorption characteristics of Cu(II) from aqueous solution onto poly(acrylamide)/attapulgite composite

Iron Tris(bipyridine) PEG Hydrogels with Covalent and Metal Coordinate Cross-Links

Swelling and metal ion uptake characteristics of kaolinite containing poly [(acrylic acid)-co-acrylamide] hydrogels

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