Scholarlink

<p>Amorphous sodium zirconium phosphate (NaZrP) with the formula Zr(HPO<sub>4</sub>)<sub>0.66</sub>(NaPO<sub>4</sub>)<sub>1.34</sub>·H<sub>2</sub>O exhibits superior Sr<sup>2+</sup> adsorption capacity (221.85 mg/g) driven by a chemisorption-dominated ion-exchange mechanism. Structural characterization confirms that the amorphous matrix of NaZrP provides accessible active sites (= ZrO<sub>2</sub>POONa/ = ZrO<sub>2</sub>POOH), while kinetic and thermodynamic analyses reveal rapid adsorption kinetics (99% Sr<sup>2+</sup> removal within 5 min) and an endothermic, spontaneous process (ΔG =  − 36.56 kJ/mol). In simulated lake water containing competing ions (Na<sup>+</sup>/K<sup>+</sup>/Ca<sup>2+</sup>/Mg<sup>2+</sup>), NaZrP retains 69.10% Sr<sup>2+</sup> uptake efficiency, demonstrating the practical potential for <sup>90</sup>Sr immobilization across diverse aquatic systems.</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

Exceptional Sr2+ adsorption performance of amorphous sodium zirconium phosphate

  • 期刊论文

  • 发表日期：

    2025年6月9日

查看全文
  • Jiahong Liu,
  • Shuying Shi,
  • Yan Liu,
  • Heng Yang,
  • Jing Yin,
  • Long Jiang,
  • Ailin Yang,
  • Yongshuang You,
  • Hao Deng,
  • Ying Xiong

摘要

Amorphous sodium zirconium phosphate (NaZrP) with the formula Zr(HPO4)0.66(NaPO4)1.34·H2O exhibits superior Sr2+ adsorption capacity (221.85 mg/g) driven by a chemisorption-dominated ion-exchange mechanism. Structural characterization confirms that the amorphous matrix of NaZrP provides accessible active sites (= ZrO2POONa/ = ZrO2POOH), while kinetic and thermodynamic analyses reveal rapid adsorption kinetics (99% Sr2+ removal within 5 min) and an endothermic, spontaneous process (ΔG =  − 36.56 kJ/mol). In simulated lake water containing competing ions (Na+/K+/Ca2+/Mg2+), NaZrP retains 69.10% Sr2+ uptake efficiency, demonstrating the practical potential for 90Sr immobilization across diverse aquatic systems.