|Title||Inventing a New Radioactive Strontium Adsorbent with 40 Times Higher Adsorption Efficiency|
Inventing a New Radioactive Strontium Adsorbent
with 40 Times Higher Adsorption Efficiency
- An Effective Response in the Event of Leakage of Radioactive Strontium from Nuclear Power Plant -
▲ (From the left) Yoon Kyung-Byung, professor of Chemistry, researcher Moon Won-kyung (in PhD program)
A research team led by Yoon Kyung-Byung, professor of Chemistry at Sogang University, succeeded in developing a substance that effectively adsorbs an extremely small amount of radioactive strontium existing in underground water, sea water, or wasted radioactive water coming from reprocessing used nuclear fuels. The findings were published in the online edition of the globally renowned academic magazine Energy & Environmental Science in June 2019 (Impact factor 33.250).
▶Title of paper: Removal of 90Sr from highly Na+-rich liquid nuclear waste with a layered vanadosilicate
▶Author: Yoon Kyung-Byung (Corresponding Author), Moon Won-kyung Mun (1st author, PhD student)
Until now, various materials have been used for disposing of radioactive Sr-90. However, when the concentration of Strontium drops below 1 ppt or the concentration of Na+ blocking adsorption of strontium increases, the adsorption ability of the substance is significantly lowered.
The research team succeeded in developing a substance with higher performance than the existing substance and named it Sogang University-7 (SGU-7). SGU-7, the highly efficient adsorbent, adsorbs even a single ion of radioactive strontium mixed in 5X1034 ions of sodium, superior results to any other presently known substances.
The radioactive strontium is an extremely toxic ion that can cause bone marrow and blood cancer upon entry into the human body. Based on the research results, by commercializing the adsorbent that can innovatively remove radioactive strontium, human beings and environment can be protected from the radioactive strontium leaked from nuclear power plants. In addition, the substance is expected to make significant contributions to disposing of radioactive strontium after safely concentrating it, which is generated from the reprocessing of nuclear fuel of nuclear power plants.
The research was carried out with the support of the development project of responsive technology to climate change promoted by the Ministry of Science and ICT and National Research Foundation of Korea. While conducting research on artificial photosynthesis, the research team found that the adsorbent was effective for radioactive strontium as well.
Professor Yoon’s team published its findings on SGU-29 efficiently capturing and collecting CO2 floating in the air in the magazine Science in 2011. In 2014, it also released the research results on SGU-45 adsorbing an extremely toxic radioactive Cs-137 efficiently in the Angewandte Chemie International Edition.