Selective Separation of Radiocesium from Complex Aqueous Matrices Using Dual Solid-Phase Extraction Systems
Selective Separation of Radiocesium from Complex Aqueous Matrices Using Dual Solid-Phase Extraction Systems
复制标题
使用双固相萃取系统从复杂水基质中选择性分离放射性铯
DOI：
10.1016/j.chroma.2021.462476
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发表时间：
2021
影响因子：
4.1
通讯作者：
Hiroshi Hasegawa
中科院分区：
文献类型：
--
作者：
Ismail M.M. Rahman ; Yan Ye ; M. Ferdous Alam ; Hikaru Sawai ; Zinnat A. Begum ; Yoshiaki Furusho ; Akio Ohta ; Hiroshi Hasegawa
放射性铯（r-Cs）释放到自然水系统中是令人关注的，因为它作为碱金属离子的溶解度很大，而且很容易与生物结合。本文提出了一种使用串联双固相萃取（SPE）系统从水基质中选择性分离Cs的技术。根据对Cs和其他潜在竞争离子（Li、Na、K、Rb、Ba、Ca、Mg和Sr）的选择性和保留/回收行为，评价了配备有螯合物（Nobias Chelate-PA 1和Nobias Chelate-PB 1）、离子交换树脂（Nobias Ion SC-1）或大环（MetaSEP AnaLig Cs-01和MetaSEP AnaLig Cs-02）的SPE。利用放射性铯的化学模拟物~（133）Cs的模拟溶液对分离过程进行了优化。优化操作参数，如pH值（3-13），流速（0.2-5.0 mL min-1），和洗脱行为（HCl，0.1-5.0 mol L-1），以确保从含水基质中最大限度地去除Cs。双SPE系统包括Nobias螯合物-PB 1，其最大限度地减少了离子的竞争影响，而使用MetaSEP AnaLig Cs-02实现了选择性Cs保留。采用日本福岛的真实的放射性铯污染水进行了验证，观察了放射性铯从复杂基体中的定量分离和富集。
The release of radiocesium (r-Cs) into natural aqueous systems is of concern because of its extended solubility as an alkaline metal ion and its facile incorporation into living beings. A technique for the selective separation of Cs from an aqueous matrix using dual solid-phase extraction (SPE) systems in a series is proposed in this paper. The SPEs equipped with chelates (Nobias Chelate-PA1 and Nobias Chelate-PB1), an ion-exchange resin (Nobias Ion SC-1), or macrocycles (MetaSEP AnaLig Cs-01 and MetaSEP AnaLig Cs-02) were evaluated in terms of selectivity and retention/recovery behavior toward Cs and other potentially competing ions (Li, Na, K, Rb, Ba, Ca, Mg, and Sr). The simulated solution of133Cs, a chemical analog of r-Cs, was used to optimize the separation process. Operating parameters such as pH (3–13), flow rate (0.2–5.0 mL min–1), and elution behavior (HCl, 0.1–5.0 mol L−1) were optimized to ensure maximum removal of Cs from the aqueous matrices. The dual SPE system comprised Nobias Chelate-PB1 that minimized the competing impact of ions, while selective Cs retention was attained with MetaSEP AnaLig Cs-02. The proposed process was verified using real r-Cs-contaminated water from Fukushima, Japan, to observe the quantitative separation and preconcentration of r-Cs from the complex matrices.