Enhanced iodine uptake in ionic liquid by biomass, solvents, or supported materials

  • X. WangEmail author
  • Z. Wang
Original Paper


Radioactive iodine is one of the nuclear wastes which might be released from nuclear accident. Ionic liquids could uptake iodine by halogen bonding. However, ionic liquids are generally expensive. Therefore, it is desired to enhance the iodine uptake in ionic liquids by cheap materials. In this work, the iodine uptake by mixtures of ionic liquids with various biomass (cellulose, sucrose, glucose, fructose, cyclodextrin, starch, chitosan, chitin, lignin, lysine, serine, glycine, proline, glutamine, alanine, and histidine), solvents (water, DMSO, DMF, CH3OH, and CH3CN), and supported material (montmorillonite, SiO2, coarse activated carbon, and graphene) was investigated. The results showed that iodine uptake could be enhanced by some types of amino acids, biomass polymers, and carbohydrate compounds. The proline dissolved in [BMIM][Ac]/DMSO mixture with a mass ratio of 1:1 can absorbed 92% iodine in 5 h. The glucose and sucrose manifested the highest capacity of 92%, while fructose, chitin, and starch had the lower capacity around 78%. However, the effects of solvents on the iodine uptake depended on the ionic liquids and solvents. Addition of DMSO into I2-phobic ionic liquid [BMIM][BF4] could greatly enhance the iodine uptake, while the addition of solvents into I2-philic ionic liquid [BMIM][Ac] either had no effect or had negative effect on the iodine uptake. Besides that, montmorillonite could enhance iodine uptake for I2-phobic ionic liquid [BMIM][BF4], and water had negative effect on the efficiency of iodine uptake by I2-philic ionic liquid [BMIM][Ac]; thus, the impurities should not be ignored in the iodine uptake.


Iodine uptake Ionic liquids Biomass Solvent Halogen bond 



This work was supported by the Fundamental Research Funds for Beijing University of Civil Engineering and Architecture (X18103, X18080) and the Post-graduate Teaching Quality Improvement Project for Beijing University of Civil Engineering and Architecture (J2017008).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Islamic Azad University (IAU) 2018

Authors and Affiliations

  1. 1.School of ScienceBeijing University of Civil Engineering and ArchitectureBeijingChina
  2. 2.School of Life Science and TechnologyShanghaiTech UniversityShanghaiChina

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