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<p>Hazardous 17β-estradiol (E2) with a higher estrogen effect, has attracted the attention of many scholars. How to transform and remove E2 in the environment becomes a research hotspot. This paper systematically explores the impacts of environmental elements like temperature, pH value, laccase concentration, humic acid concentration, and the type and concentration of metal ions on the laccase-catalyzed oxidation process of E2. The results show that the optimal environmental conditions for laccase-catalyzed oxidation of E2 are temperatures of 25&#xa0;°C to 30&#xa0;°C, pH values of 4 to 5, laccase concentration of 30 unit·L<sup>−1</sup>, no addition of humic acid, and the addition of Cu<sup>2+</sup> at a density of 1 mmol·L<sup>−1</sup>. The conversion rate of E2 by laccase remained above 70%. The coupling products were formed through covalent coupling mechanisms mediated by functional groups such as C-C and C-O-C, with the main product being E2 dimers. E2 underwent chain extension polymerization during the reaction. Laccase has the potential to remediate E2 contaminated environment in a green and efficient manner.</p>

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Effect of environmental factors on laccase-mediated 17β-estradiol coupling reaction

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年4月28日

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  • Qainhui Yang,
  • Wenxiu Dong,
  • Zesen Ye,
  • Zebin Wei,
  • Qitang Wu,
  • Rongliang Qiu,
  • Mi Li,
  • Yangmei Chen

摘要

Hazardous 17β-estradiol (E2) with a higher estrogen effect, has attracted the attention of many scholars. How to transform and remove E2 in the environment becomes a research hotspot. This paper systematically explores the impacts of environmental elements like temperature, pH value, laccase concentration, humic acid concentration, and the type and concentration of metal ions on the laccase-catalyzed oxidation process of E2. The results show that the optimal environmental conditions for laccase-catalyzed oxidation of E2 are temperatures of 25 °C to 30 °C, pH values of 4 to 5, laccase concentration of 30 unit·L−1, no addition of humic acid, and the addition of Cu2+ at a density of 1 mmol·L−1. The conversion rate of E2 by laccase remained above 70%. The coupling products were formed through covalent coupling mechanisms mediated by functional groups such as C-C and C-O-C, with the main product being E2 dimers. E2 underwent chain extension polymerization during the reaction. Laccase has the potential to remediate E2 contaminated environment in a green and efficient manner.