Efficient uptake of perrhenate/pertechnenate from aqueous solutions by the bifunctional anion-exchange resin

Author:

Li Jie1,Zhu Lin1,Xiao Chengliang2,Chen Lanhua1,Chai Zhifang1,Wang Shuao2

Affiliation:

1. State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions , Soochow University , 215123 Suzhou , China

2. State Key Laboratory of Radiation Medicine and Protection, School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions , Soochow University , 215123 Suzhou , China , Tel.: +86-512-65883945, Fax: +86-512-65883945

Abstract

Abstract In this work, batch experiments were carried out to explore the sorption properties for perrhenate (ReO4 , a surrogate for TcO4 ) by two types of commercial bifunctional anion-exchange resins (Purolite A530E and A532E). It is found that these two bifunctional anion-exchange resins could rapidly remove ReO4 from aqueous solution within 150 min and the maximum sorption capacity for ReO4 reached as high as 707 and 446 mg/g for Purolite A530E and A532E, respectively. The sorption properties were independent of pH over a wide range from 1 to 13. More importantly, both Purolite A530E and A532E exhibited excellent selectivity for the removal of ReO4 in the presence of large excess of NO3 and SO4 2−. Finally, the removal percentage of ReO4 by these two resins could be >90% and 80%, respectively, from the Hanford low-level waste melter off-gas scrubber simulant stream. Such high selectivity of Purolite A530E and A532E for the removal of ReO4 might be due to the presence of the long-chain group of –[N(Hexyl)3]+, which favored hydrophobic and large anions such as ReO4 /TcO4 rather than NO3 .

Publisher

Walter de Gruyter GmbH

Subject

Physical and Theoretical Chemistry

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