Adsorption of strontium at K-feldspar-water interface

Hanyu Wu; Zhen Xu; Lu Zhu; Xi Cheng; Mingliang Kang

doi:10.1016/j.apradiso.2022.110111

Adsorption of strontium at K-feldspar-water interface

Appl Radiat Isot. 2022 Mar:181:110111. doi: 10.1016/j.apradiso.2022.110111. Epub 2022 Jan 14.

Authors

Hanyu Wu¹, Zhen Xu², Lu Zhu¹, Xi Cheng¹, Mingliang Kang³

Affiliations

¹ Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, China.
² Yangjiang Nuclear Power Co., Ltd., Yangjiang, 529941, China.
³ Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Zhuhai, 519082, China. Electronic address: kangml3@mail.sysu.edu.cn.

PMID: 35063869
DOI: 10.1016/j.apradiso.2022.110111

Abstract

Feldspars, a type of important and prevalent primary mineral in soils, play a significant role in the migration of radioactive strontium in the environment. Nevertheless, there are rare studies on strontium adsorption on feldspars. This work presents a study on the interaction between strontium and K-feldspar at the solid-water interface. The effects of environmental factors were evaluated using batch experiments with ⁹⁰Sr tracer. Surface complexation contributed to the chemical adsorption of strontium in the slightly acidic condition.

Keywords: Adsorption; K-feldspar; Kinetics; Mechanism; Strontium.