Scholarlink

<p>Efficient removal of radioactive cobalt ions is essential for ensuring the safety of nuclear power operations. Although natural or synthetic zeolites exhibit moderate removal performance for Co<sup>2+</sup>, they suffer from insufficient removal depth due to strongly relying on sole cation-exchange mechanism. To tackle this challenge, we successfully synthesized a series of nitrogen-functionalized NaA zeolites <i>via</i> an <i>in situ</i> strategy. Among them, the imidazoline-functionalized zeolite (IM-NaA) exhibits a distribution coefficient (<i>K</i><sub>d</sub>) of 3.95×l0<sup>6</sup> mL/g, which is an order of magnitude higher than that of pristine NaA, revealing enhanced affinity toward Co<sup>2+</sup> ions. These zeolites also feature rapid adsorption kinetics and satisfied selectivity. X-Ray photoelectron spectroscopy (XPS) analysis confirms that the enhanced capture is achieved through the concurrent processes of Na<sup>+</sup>/Co<sup>2+</sup> exchange and coordination between Co<sup>2+</sup> and the functionalized nitrogen sites. This study provides an effective strategy for the rational design of zeolite-based adsorbents for the deep decontamination of cobalt ions.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Nitrogen-functionalized Zeolites for Enhanced Cobalt Decontamination

  • 期刊论文

  • 发表日期：

    2026年1月5日

查看全文
  • Zhonglin Ma,
  • Lingyi Li,
  • Ke He,
  • Wenqi Zhang,
  • Fu Peng,
  • Wanrong Song,
  • Linwei He,
  • Zhen Jiang,
  • Jie Li,
  • Long Chen,
  • Shuao Wang

摘要

Efficient removal of radioactive cobalt ions is essential for ensuring the safety of nuclear power operations. Although natural or synthetic zeolites exhibit moderate removal performance for Co2+, they suffer from insufficient removal depth due to strongly relying on sole cation-exchange mechanism. To tackle this challenge, we successfully synthesized a series of nitrogen-functionalized NaA zeolites via an in situ strategy. Among them, the imidazoline-functionalized zeolite (IM-NaA) exhibits a distribution coefficient (Kd) of 3.95×l06 mL/g, which is an order of magnitude higher than that of pristine NaA, revealing enhanced affinity toward Co2+ ions. These zeolites also feature rapid adsorption kinetics and satisfied selectivity. X-Ray photoelectron spectroscopy (XPS) analysis confirms that the enhanced capture is achieved through the concurrent processes of Na+/Co2+ exchange and coordination between Co2+ and the functionalized nitrogen sites. This study provides an effective strategy for the rational design of zeolite-based adsorbents for the deep decontamination of cobalt ions.