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Sorption and removal of iodate from aqueous solution using dried duckweed (Landoltia punctata) powder

  • Kui Zhang
  • Tao Chen
Article

Abstract

Dried duckweed (Landoltia punctata) powder is applied to remove IO3 from aqueous solutions under various conditions. The results indicate the Kd is 150 ml g−1 under general conditions. The sorption kinetics follow the pseudo-second-order equation, and the isotherm is well described by the Freundlich model. Hydroxyl and carbonyl groups contribute to IO3 sorption by ion-exchange, electrostatic attraction and redox reactions. Spectroscopic analyses prove that IO3 is reduced to I2 and I by hydroxyl groups. These results demonstrate that duckweed (Landoltia punctata) is a promising biosorbent for environmental remediation of radioactive iodine pollution.

Keywords

Iodate Sorption Duckweed Remediation Biosorbent 

Notes

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Grant No. 11305061) and the Special Fund for Geological Disposal of High-level Radioactive Waste (Grant Nos. 2012-851).

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2018

Authors and Affiliations

  1. 1.School of Nuclear Science and EngineeringNorth China Electric Power UniversityBeijingChina

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