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Porous sorbents for the capture of radioactive iodine compounds: a review

“…However, a large silver content (>20 wt%) entails a decrease in the pore volume, which in consequence limits the accessibility of the pores for iodine species (diffusion limitation). 71 In fact, the micropore volume decreases from 2.37 Â 10 À4 m 3 kg À1 for a non-exchanged zeolite to 1.83 Â 10 À4 m 3 kg À1 in the case of the zeolite with 30 wt% Ag. The use efficiency of Ag was also estimated by calculating the Ag/I ratio.…”

“…Later, numerous studies were carried out on this topic, especially during the 1970s and 1980s 21,29,34,38,40,47,52,180 and then between 2000 and 2017. 5,8,71,[74][75][76][77][78][79][80][169][170][171][173][174][175][176][177][184][185][186][187][188] These studies focused on the determination of the inuence of various parameters such as the temperature ( C), silver content (wt%), Si/Al ratio, supercial velocity, and pretreatment of the material on the adsorption capacities of silver-exchanged zeolites (ESI, Table 3 †). Other works focused on issues such as aging of the material under different atmospheres (NO x , humidity).…”

“…However, the high interest in these materials suddenly disappeared during the 1990s and early 2000s, when few studies were carried out on the subject. [65][66][67][68][69][70][71][72][73] Since 2010, a resurgence in studies on iodine capture has been observed ( Fig. 1).…”

Performance of CuII‐, PbII‐, and HgII‐Exchanged Mordenite in the Adsorption of I2, ICH3, H2O, CO, ClCH3, and Cl2: A Density Functional Study

“…One of the mosti nteresting technologiest oa ddress this issue is based on inorganic sorbentssuch as zeolites. [8][9][10][11][12][13][14][15][16] These materials have found widespreada pplications in adsorption and catalytic processes due to their unique properties:a bility to exchangei ons, high specific surface area, andr elatively low cost. In addition, good thermals tability and shape selectivity are among the factors that make zeolites extensively usable for this purpose.…”

Adsorption of gaseous radioactive iodine by Ag/13X zeolite at high temperatures

“…Iodine isotopes with mass numbers from 131 to 135 are the main fission iodine isotopes of interest, especially 131 I, which is one of the most harmful radionuclides in the large early release in nuclear plant accidents [3]. 131 I is released in the forms of elemental iodine (I 2 and I), organic iodide (CH 3 I) and hypoiodous acid (HOI) from nuclear reactor or nuclear accidents [4]. Considering high mobility and toxicity of radioactive iodine, conducting research about the removal of radioactive iodine plays an important role in ensuring the safe operation and environmental protection [5].…”