Adsorption of heavy metal ions from aqueous solution by crosslinked carboxymethyl konjac glucomannan

Niu, Chunmei; Wu, Wenhui; Wang, Zhu; Li, Shumin; Wang, Jianquan

doi:10.1016/j.jhazmat.2006.06.114

Cited by 100 publications

(35 citation statements)

References 24 publications

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“…where C e is the equilibrium concentration of metal ions (mg/L), Q is the amount of metal ions adsorbed (mg/g), Q m is the maximum adsorption capacity of metal ions (mg/g), and b is the Langmuir adsorption equilibrium constant (L/mg) [55,56]. Figure 5 shows the dependence of the equilibrium concentration on the adsorbed amount of Cu 2?…”

Section: Adsorption Kineticsmentioning

confidence: 99%

Synthesis and characterization of a new copper(II) ion-imprinted polymer

Kuras

Więckowska

2015

Polym. Bull.

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In this study, a new copper(II) ion-imprinted polymer (Cu(II)-IIP) was synthesized by the precipitation method. Itaconic acid, ethylene glycol dimethacrylate and 2,2 0 -azobisisobutyronitrile were used as functional, cross-linking monomer and a free-radical initiator, respectively. This polymer has been characterized on the basis of Fourier transform infrared spectroscopy and surface area measurements. The imprinted Cu(II) ions were completely removed from the polymer by leaching with the mixture of 0.1 M EDTA and 1 M HCl. The optimum pH for the adsorption of Cu(II) on to the polymer was 6. The selective performance of the polymer was compared to non-imprinted polymer (NIP) for the binary mixture Cu 2? /Ni 2? and Cu 2? /Zn 2? . The relative selectivity of Cu(II)-IIP was 12.8 and 32.4 times greater than that of NIP as compared with the Zn 2? and Ni 2? ions, respectively. At optimal pH value, the maximum static adsorption capacity of Cu(II)-IIP and NIP was found to be 14.8 and 4.08 mg/g, respectively.

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Section: Adsorption Kineticsmentioning

confidence: 99%

Synthesis and characterization of a new copper(II) ion-imprinted polymer

Kuras

Więckowska

2015

Polym. Bull.

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“…The relatively better correlation coefficients and better linear behavior indicated that pseudo-second-order kinetic model is more suitable to describe the kinetic profile. This phenomenon suggests that the rate-determining step might be dominated by chemical adsorption [42,43] between uranium(VI) and PAO. The similar results were obtained for the nanoparticles with different PAO chain length ( Fig.…”

Section: Sorption Kineticsmentioning

confidence: 98%

Synthesis of polyamidoxime-functionalized nanoparticles for uranium(VI) removal from neutral aqueous solutions

Huang

Zhang²,

Hua

2015

J Radioanal Nucl Chem

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It is important to separate uranium(VI) from water environment due to its high toxicity and radioactivity. A new kind of polystyrene nanoparticles with polyamidoxime is reported here for removal of uranium(VI) from aqueous solutions. The obtained PSt nanoparticles have a tunable sorption capacity. The sorption process follows pseudo-second-order kinetics, and the equilibrium can be reached within 6 h. Furthermore, the optimal pH value of sorption process is 6.5, and the adsorbents can be recycled well for uranium(VI) sorption from aqueous solution. This work indicates that the polyamidoxime-functionalized PSt nanoparticles may be used as a good adsorbent for the removal of uranium(VI) from neutral aqueous solution.

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“…where C e is the equilibrium concentration of metal ions (mg/L), Q is the amount of metal ions adsorbed (mg/g), Q m is the maximum adsorption capacity of metal ions (mg/g), and b is the Langmuir adsorption equilibrium constant (L/mg) [46,47]. If a graph showing the relationship between C e /Q and C e is drawn, we obtain a linear function.…”

Section: Isotherm Studymentioning

confidence: 99%

Synthesis, characterization and application of a novel zinc(II) ion-imprinted polymer

2017

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In our study, a Zn(II) ion-imprinted polymer (ZnIP) and non-imprinted polymer (NIP) were synthesized via free-radical polymerization. 1-Vinylimidazole, ethylene glycol dimethacrylate, 2-hydroxyethylmethacrylate and 2,2 0 -azobisisobutyronitrile were used as functional, cross-linking monomers and free-radical initiator, respectively. The obtained polymer was characterized by various analytical methods (Fourier Transform Infrared Spectroscopy, Transmission Electron Microscopy, Wavelength Dispersive X-ray Fluorescence, UV VIS, thermal analysis). The sorption properties of ZnIP and NIP were evaluated after removal of Zn(II) ions from the polymer network. The optimum pH for adsorption was 7.0. The maximum adsorption capacity at the pH was 5.2 and 0.22 mg/g for ZnIP and NIP, respectively. To determine the selectivity, the polymer was equilibrated with the binary mixture of Zn(II) ions and the interfering ions [Cu(II), Ni(II) or Co(II)]. The relative selectivity of ZnIP was 22.57, 5.44 and 46.17 for Cu(II), Ni(II) and Co(II) ions, respectively. The proposed ZnIP sorbent was applied to determine the zinc ions in urine samples by Wavelength Dispersive X-ray Fluorescence.

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Adsorption of heavy metal ions from aqueous solution by crosslinked carboxymethyl konjac glucomannan

Cited by 100 publications

References 24 publications

Synthesis and characterization of a new copper(II) ion-imprinted polymer

Synthesis and characterization of a new copper(II) ion-imprinted polymer

Synthesis of polyamidoxime-functionalized nanoparticles for uranium(VI) removal from neutral aqueous solutions

Synthesis, characterization and application of a novel zinc(II) ion-imprinted polymer

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