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<p>Bisphenol A is a persistent endocrine disrupting chemical that can induce the death of related hormones in the body. Using Suaeda glauca as raw material, 800-SBC was prepared by pyrolysis method. Fe modification biochar(Fe-SBC) and Mg-Fe bimetallic modification biochar(Mg-Fe-SBC) were prepared and used to remove bisphenol A(BPA) from the wastewater. The adsorption capacities of the two biochar for the BPA can reach 24.60 and 42.36&#xa0;mg/g. FeO(OH) was formed in the Fe-SBC and metal complexation reaction occured between Fe and BPA during the adsorption. MgFeO<sub>4</sub> and Fe<sub>3</sub>O<sub>4</sub> were formed in the Mg-Fe-SBC and the weak saturation magnetization of Mg-Fe-SBC was 1.616&#xa0;emu/g. The adsorption mechanisms of two types of biochar may include pore filling, metal complexation, and π-π conjugation and hydrogen bonding. The Langmuir isotherm model and pseudo second order kinetic model have better fitting effects on the adsorption process. The adsorption process was a single-layer chemical adsorption. The thermodynamic results showed that all adsorption processes were spontaneous, endothermic and chaotic reactions.</p>

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Adsorption of Bisphenol A by Modified Suaeda Biochar: Adsorption Properties and Mechanism

  • 期刊论文

  • 发表日期：

    2025年12月11日

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  • Di Liu,
  • Yanrong Cai,
  • Xuechun Yu,
  • Huiyao Tian,
  • Weili Jiang,
  • Qiong Wang

摘要

Bisphenol A is a persistent endocrine disrupting chemical that can induce the death of related hormones in the body. Using Suaeda glauca as raw material, 800-SBC was prepared by pyrolysis method. Fe modification biochar(Fe-SBC) and Mg-Fe bimetallic modification biochar(Mg-Fe-SBC) were prepared and used to remove bisphenol A(BPA) from the wastewater. The adsorption capacities of the two biochar for the BPA can reach 24.60 and 42.36 mg/g. FeO(OH) was formed in the Fe-SBC and metal complexation reaction occured between Fe and BPA during the adsorption. MgFeO4 and Fe3O4 were formed in the Mg-Fe-SBC and the weak saturation magnetization of Mg-Fe-SBC was 1.616 emu/g. The adsorption mechanisms of two types of biochar may include pore filling, metal complexation, and π-π conjugation and hydrogen bonding. The Langmuir isotherm model and pseudo second order kinetic model have better fitting effects on the adsorption process. The adsorption process was a single-layer chemical adsorption. The thermodynamic results showed that all adsorption processes were spontaneous, endothermic and chaotic reactions.