Adsorption and removal of strontium in aqueous solution by synthetic hydroxyapatite

Yuichi Nishiyama; Tadashi Hanafusa; Jun Yamashita; Yoko Yamamoto; Toshiro Ono

doi:10.1007/s10967-015-4228-9

Adsorption and removal of strontium in aqueous solution by synthetic hydroxyapatite

J Radioanal Nucl Chem. 2016:307:1279-1285. doi: 10.1007/s10967-015-4228-9. Epub 2015 Jun 20.

Authors

Yuichi Nishiyama¹, Tadashi Hanafusa¹, Jun Yamashita², Yoko Yamamoto², Toshiro Ono¹

Affiliations

¹ Department of Radiation Research, Advanced Science Research Center, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama, 700-8558 Japan.
² Institute of Plant Science and Resources, Okayama University, 2-20-1 Chuo, Kurashiki, Okayama 710-0046 Japan.

Abstract

Hydroxyapatite (HAP) is a main mineral constituent of bone and tooth and has an outstanding biocompatibility. HAP is a possible sorbent for heavy metals in wastewater due to its high adsorption capacity and low water solubility. We developed a removal system of ⁹⁰Sr from aqueous solution by HAP column procedure. More than 90 % of ⁹⁰Sr was adsorbed and removed from the ⁹⁰Sr containing solution. Divalent cations, Ca²⁺, had little effect on the removal of ⁹⁰Sr up to a concentration of 1 mmol L^-1. This clearly indicates that the HAP column technique is advantageous with respect to the capacity to adsorb ⁹⁰Sr from water present in the environment.

Keywords: Adsorption; Desorption; Divalent cation; Hydroxyapatite; Strontium.