Scholarlink

<p>The use of nano zero-valent iron (nZVI) for chlorophenol remediation faces significant particle aggregation and surface passivation challenges that undermine their application. In this study, a novel SC-nFe<sup>0</sup>/Pd@nCo<sub>3</sub>O<sub>4</sub> composite was synthesized by synergistically modifying bimetallic nano-Fe<sup>0</sup>/Pd (nFe<sup>0</sup>/Pd) using sodium citrate (SC) and nano-Co<sub>3</sub>O<sub>4</sub> (nCo<sub>3</sub>O<sub>4</sub>), for enhanced removal of 2,4-dichlorophenol (2,4-DCP) from water. Under optimal conditions (initial 2,4-DCP concentration: 20.0&#xa0;mg·L<sup>−1</sup>, Pd loading: 0.30 wt%, composite dosage: 0.5&#xa0;g·L<sup>−1</sup>, pH: 6.0), the SC-nFe<sup>0</sup>/Pd@nCo<sub>3</sub>O<sub>4</sub> composite achieved 92.68% removal efficiency and 91.91% dechlorination rate in two hours. Results demonstrated that carrier nCo<sub>3</sub>O<sub>4</sub> has improved the dispersion and stability of nZVI particles and served as an efficient electron-transfer channel to facilitate electron reception and transport, thereby accelerating the reaction. As a complexing agent, SC can strip the passivation layer on the surface of nZVI and chelate iron ions in water to form a soluble complex Fe<sup>II/III</sup>-citrate, preventing precipitation and exposing more reactive sites on nanoparticles surface. It also formed a surface mesh structure&#xa0;through the carboxyl groups of Fe<sup>II/III</sup>-citrate complex binding to nZVI, which helped to alleviate the passivation. Thus, the findings revealed that the as-prepared composite demonstrates considerable potential for the remediation of wastewater containing chlorinated organic compounds and represents a promising alternative solution.</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

Enhanced 2,4-Dichlorophenol Dechlorination By Sodium Citrate and Nano-Co3O4 Synergistic`ally Constructed Nano-Fe0/Pd with Superior Reactivity

  • 期刊论文

  • 发表日期：

    2026年2月14日

查看全文
  • Hongyi Zhou,
  • Xiaoqiang Zhang,
  • Yuman Hu,
  • Hao Zhang,
  • Shufen Hu,
  • Shams Ali Baig,
  • Yangchun Luo,
  • Jinhai Chen,
  • Junliang Wang

摘要

The use of nano zero-valent iron (nZVI) for chlorophenol remediation faces significant particle aggregation and surface passivation challenges that undermine their application. In this study, a novel SC-nFe0/Pd@nCo3O4 composite was synthesized by synergistically modifying bimetallic nano-Fe0/Pd (nFe0/Pd) using sodium citrate (SC) and nano-Co3O4 (nCo3O4), for enhanced removal of 2,4-dichlorophenol (2,4-DCP) from water. Under optimal conditions (initial 2,4-DCP concentration: 20.0 mg·L−1, Pd loading: 0.30 wt%, composite dosage: 0.5 g·L−1, pH: 6.0), the SC-nFe0/Pd@nCo3O4 composite achieved 92.68% removal efficiency and 91.91% dechlorination rate in two hours. Results demonstrated that carrier nCo3O4 has improved the dispersion and stability of nZVI particles and served as an efficient electron-transfer channel to facilitate electron reception and transport, thereby accelerating the reaction. As a complexing agent, SC can strip the passivation layer on the surface of nZVI and chelate iron ions in water to form a soluble complex FeII/III-citrate, preventing precipitation and exposing more reactive sites on nanoparticles surface. It also formed a surface mesh structure through the carboxyl groups of FeII/III-citrate complex binding to nZVI, which helped to alleviate the passivation. Thus, the findings revealed that the as-prepared composite demonstrates considerable potential for the remediation of wastewater containing chlorinated organic compounds and represents a promising alternative solution.