磁性巯基共价有机聚合物用于废水中有机污染物和重金属离子的同步去除

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中图分类号：X506 文献标志码：A 文章编号：2097-2911-（2025）06-0053-11

Abstract： To synthesize the multifunctional adsorbents for simultaneous removal of organic pollutants and heavy metal ions is of great importance in textile wastewater treatment.To achieve the simultaneous adsorption of benzenes and Hg（II） ， anew type of magnetic thiol-covalent organic polymer（ Fe3O4@COP-S. SH） was synthesized as a multifunctional adsorbent.The introductionof large-area conjugated 1，3，6，8-tetraphenylpyrene moiety provided strong π-π stacking and hydrophobic interactions for binding benzenes， and meanwhile the modification with- ⋅S（CH2）2SH groups supplied strong binding sites for adsorbing Hg （I）.Moreover，its magnetic core enabled fast separation of adsorbent fromsolution bya magnetic field.Results showed that the new adsorbent exhibited good thermodynamic adsorption ability for toluene， m-xylene， and Hg（II） with maximum adsorption capacities of 769.2mg/g 469.5mg/g and 431.5mg/g respectively，which are higher than those of most existing magnetic adsorbents.Furthermore，this new adsorbent displayed fast binding kinetics for three pollutants. In addition， Fe3O4@COP-S-SH achieved simultaneous high adsorption efficiencies for three pollutants in water at different concentrations with adsorption efficiencies（ 93.2% to 98.5% ， 97.6% to 99.5% and 94.1% to 99.0% respectively），and it also performed satisfactory binding performance for three pollutants in a simulated wastewater with adsorption efficiencies of 91.1% ， 96.4% and 87.0% correspondingly. Notably，this adsorbent possessed good reusability （at least five cycles）.The multifunctional adsorbent synthesized in this work displays obvious advantages over the existing magnetic ones， which can only remove benzenes or Hg（II） separately， therefore it can be potentially utilized as excellent material for the efficient simultaneous removal of benzenes and Hg（II） with high capacity in real wastewater.The design and synthesis of this new material also provides a novel strategy for preparing magnetic multifunctional adsorbents.

Keywords： magnetic adsorbent; thiol covalent organic polymer; simultaneous adsorption; benzenes; mercury （II） ion

水污染是当今全球面临的重要问题之一。（剩余15011字）