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<p>The increasing concern over polychlorinated biphenyls (PCBs) in water systems has driven the development of green and efficient remediation approaches. This study aims to evaluate the catalytic performance of biogenically synthesized Fe<sup>o</sup>-based bimetallic nanoparticles (Fe/Cu and Fe/Ni), prepared using concentrated <i>Camellia sinensis</i> extract, for the hydrodechlorination (HDC) of PCB-52 in aqueous solution. Batch experiments revealed that both types of bimetallic nanoparticles exhibited good conversion. The efficiency was 71.59% after 90&#xa0;min at a concentration of 100&#xa0;µg L<sup>−1</sup> and pH 3 for Fe/Cu. Regarding Fe/Ni, the conversion efficiency was 85.11% after 180&#xa0;min at a concentration of 100&#xa0;µg L<sup>−1</sup> and pH = 7. The intermediate products formed during the HDC process of PCB-52 predominantly consisted of relatively non-toxic substances, such as biphenyl and compounds with biphenyl rings containing one to three chlorine atoms. In addition, the two bimetallic nanoparticles Fe/Ni and Fe/Cu may also be reused, with a decrease in activity of ∆1 = 17.15% and ∆2 = 11.5% after 5 cycles, respectively. These findings highlight the potential of green synthesized Fe<sup>o</sup>-based bimetallic catalysts as effective and recyclable materials for the treatment of chlorinated organic pollutants in water.</p>

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Green Catalysts of Nano Fe0-Based Bimetallic for Hydrodechlorination to Convert PCB-52 in Aqueous

  • 期刊论文

  • 发表日期：

    2025年8月7日

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  • Hong Son Nguyen,
  • Van Hoang Nguyen,
  • Minh Thang Le,
  • Thanh Hung Nguyen,
  • Dinh Quang Ta,
  • Quang Minh Le,
  • Tuan Doan,
  • Thi Kim Anh Bui,
  • Ngoc Toan Vu

摘要

The increasing concern over polychlorinated biphenyls (PCBs) in water systems has driven the development of green and efficient remediation approaches. This study aims to evaluate the catalytic performance of biogenically synthesized Feo-based bimetallic nanoparticles (Fe/Cu and Fe/Ni), prepared using concentrated Camellia sinensis extract, for the hydrodechlorination (HDC) of PCB-52 in aqueous solution. Batch experiments revealed that both types of bimetallic nanoparticles exhibited good conversion. The efficiency was 71.59% after 90 min at a concentration of 100 µg L−1 and pH 3 for Fe/Cu. Regarding Fe/Ni, the conversion efficiency was 85.11% after 180 min at a concentration of 100 µg L−1 and pH = 7. The intermediate products formed during the HDC process of PCB-52 predominantly consisted of relatively non-toxic substances, such as biphenyl and compounds with biphenyl rings containing one to three chlorine atoms. In addition, the two bimetallic nanoparticles Fe/Ni and Fe/Cu may also be reused, with a decrease in activity of ∆1 = 17.15% and ∆2 = 11.5% after 5 cycles, respectively. These findings highlight the potential of green synthesized Feo-based bimetallic catalysts as effective and recyclable materials for the treatment of chlorinated organic pollutants in water.