Cr(III)-imprinted polymeric beads: Sorption and preconcentration studies

Birlik, Ebru; Ersöz, Arzu; Açikkalp, Erol; Deni̇zli̇, Adil; Say, Rıdvan

doi:10.1016/j.jhazmat.2006.06.141

Cited by 139 publications

(71 citation statements)

References 32 publications

(30 reference statements)

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“…The reusability of Hg-IIPs was tested by the adsorption-desorption studies according to references [11,12,32]. In brief, adsorbed Hg 2+ ions were desorbed by treatment with 0.1 mol L −1 HCl.…”

Section: Hg 2+ Adsorption-desorption Studiesmentioning

confidence: 99%

Novel Hg2+-imprinted polymers based on thymine–Hg2+–thymine interaction for highly selective preconcentration of Hg2+ in water samples

Chen

et al. 2012

Journal of Hazardous Materials

132

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Section: Hg 2+ Adsorption-desorption Studiesmentioning

confidence: 99%

Novel Hg2+-imprinted polymers based on thymine–Hg2+–thymine interaction for highly selective preconcentration of Hg2+ in water samples

Chen

et al. 2012

Journal of Hazardous Materials

132

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“…were used to calculate maximum adsorption capacity for the IIP and CP at optimum conditions. Adsorption capacity of each metal was measured and calculated by the following equation (Birlik et al, 2007):…”

Section: Preparation Of Ion-imprinted Quaternised Polymermentioning

confidence: 99%

“…According to Birlik et al (2007) Eq. (3) can be used to calculate the selectivity coefficient for the binding of a metal ion in the presence of other competitive ions, from equilibrium binding data:…”

Section: Selectivity Studiesmentioning

confidence: 99%

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Selective removal of chromium (VI) from sulphates and other metal anions using an ion-imprinted polymer

Pakade¹,

Cukrowska²,

Darkwa³

et al. 2011

WSA

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A linear copolymer was prepared from 4-vinylpyridine and styrene. An ion-imprinted polymer (IIP) specific for Cr (VI) adsorption was prepared by copolymerisation of the quaternised linear copolymer (quaternised with 1,4-chlorobutane), 2-vinylpyridine functional monomer and ethylene glycol dimethacrylate (EGDMA), as the cross-linking monomer, in the presence of 1,1'-azobis(cyclohexanecarbonitrile) as initiator. Ammonium dichromate and aqueous methanol were used as a template and porogenic solvent, respectively. Leaching of the chromate template from the polymer particles was achieved with successive stirring of the ion-imprinted polymer (IIP) particles in 4 M HNO 3 solutions to obtain leached materials, which were then used for selective rebinding of Cr (VI) ions from aqueous solutions. Similarly, the non-imprinted polymer/ control polymer (NIP/CP) material was also prepared under exactly the same conditions as the IIP but without the chromate anion template. Various parameters, such as solution pH, initial concentration, aqueous phase volume, sorbent dosage, contact time and leaching solution volumes, were investigated. Scanning electron microscopy (SEM), Fourier Transform Infrared (FTIR) spectroscopy, BET surface area and pore size analysis were used for the characterisation of IIP (both unleached and leached) and CP materials. Optimal parameters were as follows: solution pH, 3; contact time, 120 min; eluent, 20 mℓ of 0.1 M NaOH; and sorbent amount, 125 mg. Maximum retention capacity of IIP and CP was 37.58 and 25.44 mg•g -1 , respectively. The extraction efficiencies of the IIP and CP were compared using a batch and SPE mode of extraction. In the absence of high concentrations of ions, especially sulphate ions, both CP and IIP demonstrated no differences in binding of Cr (VI), which was almost 100%. However, in the presence of high concentrations of sulphate ions, the selectivity on the CP completely collapsed. The study clearly demonstrates the suitably of the developed IIP for selective extraction of Cr (VI) in complex samples such as those from acid mine drainage. The selectivity was also compared by direct injection of the real-world sample, both spiked and non-spiked, into that obtained after IIP selective extraction. Despite the method's very low detection limits for direct injection (below 1 µg•ℓ -1 ), no Cr (VI) was obtained. However, after IIP selective extraction, spiked Cr (VI) was detected in the spiked sample.

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“…Molecular imprinting is a method that enables the formation of tailor-made recognition materials by copolymerizing suitable monomers in the presence of a desired print molecule (Yilmaz et al 2002;Kugimiya et al 1998;Jin and Ho 2005;Su et al 2008;Li et al 2007a, b;Pap and Horvai 2004;Lei and Tan 2002;Amut et al 2010;Kubo et al 2004;Kandimalla 2004;Andersson 2000;Asanuma et al 2001;Cirillo et al 2010;Matsui et al 2004;Shiigi et al 2003;Caro et al 2006;Zhang et al 2009;Pichon 2007). Recently, there are some reports on the application of imprinted technique for separation and enrichment of heavy metal ions (Birlik et al 2007;Baghel et al 2007). Among present ion-imprinted technologies, imprinting a matrix with binding sites situated at the surface has many advantages including the following: the sites are more accessible, mass transfer is faster and the binding kinetics is faster .…”

Section: Introductionmentioning

confidence: 99%

The Pre-concentration and determination of Iridium and Palladium in environmental water by imprinted polymer-based method

Kalal

Taghiof

Hoveidi

et al. 2013

Int. J. Environ. Sci. Technol.

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In this study, the imprinted aniline-formaldehyde was used as an adsorbent for removal of Iridium and Palladium ions from aqueous solutions through batch equilibrium. The sorbent was characterized by fourier transform infrared spectroscopy. The influence of pH, equilibrium time, temperature and initial concentration of metal ions on adsorbed amount of both ions were investigated. The maximum adsorption capacity in initial concentration of 100 mg/L was found to be 12.5 mg/g at pH 7.0 and 14.3 mg/g at pH 8.0 for Iridium and Palladium, respectively. In addition, the best desorption of the metal ions from resin was obtained by 0.5 mol/L nitric acid as eluting agent. The profile of both ions uptake on this sorbent reflects good accessibility of the chelating sites in the imprinted aniline-formaldehyde. Langmuir, Freundlich, Temkin and Redlich-Peterson isotherm models were applied to analyze the experimental data. Moreover, Langmuir linear method was used to obtain the isotherm parameters. However, Langmuir type II achieved the highest coefficient which led to the best fit for the palladium and the best fit for Iridium obtained from linear Redlich-Peterson. However, the thermodynamic parameters (DG°, DH°, and DS°) were also determined using the equilibrium constant values obtained at different temperatures. The results showed that the adsorption for Iridium and Palladium ions was spontaneous nature and endothermic. Moreover, the method was applied for the determination of both ions from tap water samples.

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Cr(III)-imprinted polymeric beads: Sorption and preconcentration studies

Cited by 139 publications

References 32 publications

Novel Hg2+-imprinted polymers based on thymine–Hg2+–thymine interaction for highly selective preconcentration of Hg2+ in water samples

Novel Hg2+-imprinted polymers based on thymine–Hg2+–thymine interaction for highly selective preconcentration of Hg2+ in water samples

Selective removal of chromium (VI) from sulphates and other metal anions using an ion-imprinted polymer

The Pre-concentration and determination of Iridium and Palladium in environmental water by imprinted polymer-based method

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