Efficient capture of radioactive iodine by ZIF-8 derived porous carbon

Sheng Liu; Yiyang Zeng; Ai Zhang; Yuxin Song; Yuran Ni; Jiamao Li; Fangting Chi; Chengjian Xiao

doi:10.1016/j.jenvrad.2022.106895

Efficient capture of radioactive iodine by ZIF-8 derived porous carbon

J Environ Radioact. 2022 Aug:249:106895. doi: 10.1016/j.jenvrad.2022.106895. Epub 2022 May 17.

Authors

Sheng Liu¹, Yiyang Zeng¹, Ai Zhang¹, Yuxin Song¹, Yuran Ni¹, Jiamao Li², Fangting Chi³, Chengjian Xiao⁴

Affiliations

¹ Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang, 621010, China; School of National Defence Science and Technology, Southwest University of Science and Technology, Mianyang, 621010, China.
² Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, 621900, China.
³ Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang, 621010, China; School of National Defence Science and Technology, Southwest University of Science and Technology, Mianyang, 621010, China. Electronic address: chifangting@swust.edu.cn.
⁴ Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, 621900, China. Electronic address: xiaocj@caep.cn.

PMID: 35594799
DOI: 10.1016/j.jenvrad.2022.106895

Abstract

Due to the rapid diffusion of radioactive iodine, the demand for safe and efficient capture and storage of radioactive iodine is increasing worldwide. The use of porous carbon materials to capture iodine has aroused great interest. This work prepared porous carbon materials derived from polymetallic oxides of the zeolitic imidazolate framework (ZIF) by pyrolysis at 1000 °C. The carbon materials (CZIF-1000) have a high specific surface area of about 1110 m²/g and a total pore volume of 0.92 cm³/g. Adsorption studies have shown that the CZIF-1000 had significant adsorption performance for iodine, and the adsorption capacity can reach 790.8 mg/g at 8h. The potential mechanism of adsorption is that the carbonization causes the charge-transfer interaction and pore size distribution. Compared with the conventional adsorbents, the adsorbents showed faster kinetics and high extraction capacity for iodine. This experiment provides an effective method for designing a highly efficient adsorbent for iodine and broadens the ideas for developing new iodine extraction adsorbents.

Keywords: Charge-transfer interaction; Porous carbons; Radioactive iodine; Zeolitic imidazolate framework.

MeSH terms

Adsorption
Carbon
Humans
Iodine Radioisotopes
Iodine*
Porosity
Radiation Monitoring*
Thyroid Neoplasms*
Zeolites*

Substances

Carbon
Iodine Radioisotopes
Zeolites
Iodine