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Synthesis and Properties of Surface Molecular Imprinting Adsorbent for Removal of Pb2+

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Abstract

A new chitosan imprinting adsorbent using diatomite as core material was prepared by using the surface molecular imprinting technology with the Pb2+ as imprinted ion. The preparation process conditions of the surface molecular imprinting adsorbent were studied. The adsorbent was characterized by using Fourier transform infrared (FTIR) spectrum. FTIR spectrum indicated that it was cross-linked by epichlorohydrin. The new imprinting adsorbent could provide a higher adsorption capacity for Pb2+, which reached 139.6 mg/g increasing 32.3% compared with cross-linking chitosan adsorbent (the initial Pb2+ concentration of 600 mg/L). The adsorption velocity was quick and the equilibration time of the imprinting adsorbent for Pb2+ was 3 h that shortened about 40% compared with cross-linking chitosan adsorbent. It had a more wide pH range of 5–7 than that of cross-linking chitosan adsorbent. The new imprinting adsorbent can be reused for up to ten cycles without loss of adsorption capacity. In the kinetics and isotherm study, the pseudosecond order model and Langmuir model could represent the adsorption process.

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Acknowledgements

The authors want to express their thanks for the supports from Natural Science Foundation of China (20636010 and 50373003), the National Basic Research Program (973 Program) of China (2007CB714305), and the (863) High Technology Project (2006AA020101).

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Authors and Affiliations

  1. State Key Laboratory of Chemical Resource Engineering, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, People’s Republic of China

    Wei Jiang, Haijia Su, Hongyan Huo & Tianwei Tan

Authors
  1. Wei Jiang
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  2. Haijia Su
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  3. Hongyan Huo
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  4. Tianwei Tan
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Corresponding author

Correspondence to Haijia Su.

Appendix

Appendix

c 0 :

the initial concentration of metal ion (mg/L)

η :

the removal rate

Q :

the quality of the adsorbed Pb for per gram adsorbent (mg/g)

c e :

the equilibrated concentrations of metal ion (mg/L),

V :

the volume of added solution (L)

W :

the weight of the adsorbent (g)

t :

the adsorption time (min)

q :

the adsorptive capacity of time (mg/g)

q e :

the balance adsorption capacity (mg/g)

k 2 :

the second-level adsorption velocity constant [g/(mg min)]

q m :

the maximum adsorption capacity (mg/g)

b :

constant

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Jiang, W., Su, H., Huo, H. et al. Synthesis and Properties of Surface Molecular Imprinting Adsorbent for Removal of Pb2+ . Appl Biochem Biotechnol 160, 467–476 (2010). https://doi.org/10.1007/s12010-008-8366-1

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  • DOI: https://doi.org/10.1007/s12010-008-8366-1

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