Scholarlink

<p>In this study, the ion imprinted EDTA-modified magnetic mesoporous silica nanospheres were employed to explore their selective adsorption performance for Cr(Ⅲ) in aqueous solutions. Characterization results showed that Cr-IIMCE with EDTA modification and mesoporous structure had a specific surface area of 542.10 m<sup>2</sup>·g<sup>−1</sup> and a pore size of 4.29&#xa0;nm. At pH 3.0, the Cr(Ⅲ)-imprinted material (Cr-IIMCE) achieved the maximum adsorption capacity of 20.52&#xa0;mg·g<sup>−1</sup> for Cr(Ⅲ), which was significantly higher than those of the non-imprinted material (NIMCE) and Fe<sub>3</sub>O<sub>4</sub>@C. Cr-IIMCE also demonstrated excellent removal efficiency for Cr(III)-EDTA and Cr(III)-GLT, with adsorption capacities of 10.02&#xa0;mg·g<sup>−1</sup> and 15.30&#xa0;mg·g<sup>−1</sup>, respectively. The high selectivity of Cr-IIMCE for Cr(III) was observed and the adsorption of Cr(III) by Cr-IIMCE is mainly achieved through the coordination between Cr(III) and the EDTA-imprinted vacancies on the surface of the adsorbent. After four adsorption-regeneration cycles, the adsorbents maintained a stable recovery efficiency of 96.88%, demonstrating excellent stability and economic value of reusability for repeated use. This provides a new adsorbent for removing heavy metals from industrial wastewater.</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

Novel Ion-Imprinted EDTA-Modified Magnetic Mesoporous Silica Nanospheres for the Effective and Selective Adsorptive Removal of Cr(Ⅲ) from Water

  • 期刊论文

  • 发表日期：

    2026年3月31日

查看全文
  • Mengyao Zhang,
  • Jiahong Wang,
  • Yao Chen,
  • Zekun Xu,
  • Yanxin Zhang,
  • Chunli Hu

摘要

In this study, the ion imprinted EDTA-modified magnetic mesoporous silica nanospheres were employed to explore their selective adsorption performance for Cr(Ⅲ) in aqueous solutions. Characterization results showed that Cr-IIMCE with EDTA modification and mesoporous structure had a specific surface area of 542.10 m2·g−1 and a pore size of 4.29 nm. At pH 3.0, the Cr(Ⅲ)-imprinted material (Cr-IIMCE) achieved the maximum adsorption capacity of 20.52 mg·g−1 for Cr(Ⅲ), which was significantly higher than those of the non-imprinted material (NIMCE) and Fe3O4@C. Cr-IIMCE also demonstrated excellent removal efficiency for Cr(III)-EDTA and Cr(III)-GLT, with adsorption capacities of 10.02 mg·g−1 and 15.30 mg·g−1, respectively. The high selectivity of Cr-IIMCE for Cr(III) was observed and the adsorption of Cr(III) by Cr-IIMCE is mainly achieved through the coordination between Cr(III) and the EDTA-imprinted vacancies on the surface of the adsorbent. After four adsorption-regeneration cycles, the adsorbents maintained a stable recovery efficiency of 96.88%, demonstrating excellent stability and economic value of reusability for repeated use. This provides a new adsorbent for removing heavy metals from industrial wastewater.