Efficient and simultaneous capture of iodine and methyl iodide achieved by a covalent organic framework

Abstract Radioactive molecular iodine (I 2 ) and organic iodides, mainly methyl iodide (CH 3 I), coexist in the off-gas stream of nuclear power plants at low concentrations, whereas few adsorbents can effectively adsorb low-concentration I 2 and CH 3 I simultaneously. Here we demonstrate that the I 2 adsorption can occur on various adsorptive sites and be promoted through intermolecular interactions. The CH 3 I adsorption capacity is positively correlated with the content of strong binding sites but is unrelated to the textural properties of the adsorbent. These insights allow us to design a covalent organic framework to simultaneously capture I 2 and CH 3 I at low concentrations. The developed material,…

• KA
  King Abdullah University of Science and Technology

  Awards: FCC/1/1972-43, FCC/1/1972-43-01