Scholarlink

<p>Triclosan (TCS), a widely used antimicrobial agent, has emerged as a contaminant of concern due to its persistence, toxicity, and lack of regulation in most water quality standards. In this study, Fe/Co bimetallic nanoparticles (50–70&#xa0;nm) were synthesized via a green method using <i>Eucalyptus sp.</i> leaf extract and their performance was assessed for TCS removal from water. The nanomaterials were characterized by SEM, XRD, EDS, FTIR and BET, confirming the nanoscale structures and surface coating by polyphenols. Batch adsorption experiments achieved a maximum removal efficiency of 96.9 ± 1.93% at pH 5 and 30&#xa0;°C with an adsorbent dosage of 0.8&#xa0;g L⁻<sup>1</sup> within 60&#xa0;min, an adsorption capacity of 9.49 ± 0.23&#xa0;mg&#xa0;g⁻<sup>1</sup>. Kinetic data fitted well with the pseudo—second—order model (R<sup>2</sup> = 0.989), while equilibrium adsorption was best described by the Freundlich isotherm (R<sup>2</sup> = 0.9843), indicating adsorption on a heterogeneous surface governed by multiple interaction mechanisms. Thermodynamic analysis revealed that the adsorption process was spontaneous and exothermic, with negative ΔG° and ΔH° values, indicating energetically favorable interactions between triclosan and the Fe/Co surface. The proposed adsorption mechanism involved coordination between TCS hydroxyl groups and Fe/Co centers, together with π-π interactions and hydrogen bonding. Although the material retained 77% efficiency after the first cycle, its performance declined markedly after three cycles, reflecting limited reusability. These results demonstrate that Fe/Co nanoparticles are potential sustainable adsorbents for TCS removal and highlight the need for strategies to enhance their stability for practical application and reusability.</p> Graphic Abstract <p></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

Green synthesized Fe/Co bimetallic nanoparticles from Eucalyptus sp. leaves for efficient removal of triclosan from water

  • 期刊论文

  • 发表日期：

    2026年6月15日

查看全文
  • D. T. L. Phuong,
  • T. D. Tuyen,
  • B. V. Cong,
  • H. Q. Trang,
  • P. N. Anh,
  • N. T. L. Hương

摘要

Triclosan (TCS), a widely used antimicrobial agent, has emerged as a contaminant of concern due to its persistence, toxicity, and lack of regulation in most water quality standards. In this study, Fe/Co bimetallic nanoparticles (50–70 nm) were synthesized via a green method using Eucalyptus sp. leaf extract and their performance was assessed for TCS removal from water. The nanomaterials were characterized by SEM, XRD, EDS, FTIR and BET, confirming the nanoscale structures and surface coating by polyphenols. Batch adsorption experiments achieved a maximum removal efficiency of 96.9 ± 1.93% at pH 5 and 30 °C with an adsorbent dosage of 0.8 g L⁻1 within 60 min, an adsorption capacity of 9.49 ± 0.23 mg g⁻1. Kinetic data fitted well with the pseudo—second—order model (R2 = 0.989), while equilibrium adsorption was best described by the Freundlich isotherm (R2 = 0.9843), indicating adsorption on a heterogeneous surface governed by multiple interaction mechanisms. Thermodynamic analysis revealed that the adsorption process was spontaneous and exothermic, with negative ΔG° and ΔH° values, indicating energetically favorable interactions between triclosan and the Fe/Co surface. The proposed adsorption mechanism involved coordination between TCS hydroxyl groups and Fe/Co centers, together with π-π interactions and hydrogen bonding. Although the material retained 77% efficiency after the first cycle, its performance declined markedly after three cycles, reflecting limited reusability. These results demonstrate that Fe/Co nanoparticles are potential sustainable adsorbents for TCS removal and highlight the need for strategies to enhance their stability for practical application and reusability.

Graphic Abstract