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<p>Terdizolamide phosphate (TZD), a second-generation oxazolidinone antibiotic with a long half-cycle, poses a potential threat to ecosystems and humans if present in water over an extended duration. Magnetic biochar (CF-biochar) loaded with CeFe<sub>2</sub>O<sub>4</sub> was firstly synthesized by microwave ablation-anaerobic carbonization using corn straw as raw material and Ce(NO<sub>3</sub>)<sub>3</sub> and Fe(NO<sub>3</sub>)<sub>3</sub> as modifiers. These modifiers were used as activators for peroxymonosulfate (PMS) and adsorbents for removing TZD. The maximum adsorption capacity of CF-biochar was up to 2869.44 mg g<sup>−1</sup>, which was much higher than that of modified biochar. The CF-biochar/PMS system achieved 99.72% removal of TZD and accelerated the removal rate with good results. Results from quenching and electron spin resonance (ESR) tests showed that <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11356_2025_35966_Article_IEq1.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="37" /> </InlineMediaObject> <EquationSource Format="TEX">\(\cdot OH\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo>·</mo> <mi>O</mi> <mi>H</mi> </mrow> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11356_2025_35966_Article_IEq2.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="41" /> </InlineMediaObject> <EquationSource Format="TEX">\({SO}_{4}^{\cdot -}\)</EquationSource> <EquationSource Format="MATHML"><math> <msubsup> <mrow> <mi mathvariant="italic">SO</mi> </mrow> <mrow> <mn>4</mn> </mrow> <mrow> <mo>·</mo> <mo>-</mo> </mrow> </msubsup> </math></EquationSource> </InlineEquation> played a major role in the oxidative degradation of TZD. Besides, they had a good removal effect on TZD among other co-existing anions. CF-biochar exhibited a smaller particle size, larger specific surface area, more abundant pore size, and high magnetic nature. The removal kinetics and removal isotherms were modeled to show that the adsorption of TZD by CF-biochar was a spontaneous, exothermic, physical multilayer adsorption process. Main driving force corresponded to electrostatic attraction and hydrophobic properties. Therefore, the CF-biochar/PMS system was an efficient, promising, and sustainable technology for removing TZD.</p>

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Mechanisms of removing terdizolamide phosphate from water by the activation of potassium peroxymonosulfate with CeFe2O4 biochar

  • 期刊论文

  • 发表日期：

    2025年1月30日

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  • Lei Zhang,
  • Tian Ai,
  • Shujuan Dai,
  • Guoyong Xiao,
  • Xiaolu Xiong,
  • Nan Zhang,
  • Jian Si,
  • Guanyue Wang,
  • Wanwan Xue,
  • Jing Xu

摘要

Terdizolamide phosphate (TZD), a second-generation oxazolidinone antibiotic with a long half-cycle, poses a potential threat to ecosystems and humans if present in water over an extended duration. Magnetic biochar (CF-biochar) loaded with CeFe2O4 was firstly synthesized by microwave ablation-anaerobic carbonization using corn straw as raw material and Ce(NO3)3 and Fe(NO3)3 as modifiers. These modifiers were used as activators for peroxymonosulfate (PMS) and adsorbents for removing TZD. The maximum adsorption capacity of CF-biochar was up to 2869.44 mg g−1, which was much higher than that of modified biochar. The CF-biochar/PMS system achieved 99.72% removal of TZD and accelerated the removal rate with good results. Results from quenching and electron spin resonance (ESR) tests showed that \(\cdot OH\) · O H and \({SO}_{4}^{\cdot -}\) SO 4 · - played a major role in the oxidative degradation of TZD. Besides, they had a good removal effect on TZD among other co-existing anions. CF-biochar exhibited a smaller particle size, larger specific surface area, more abundant pore size, and high magnetic nature. The removal kinetics and removal isotherms were modeled to show that the adsorption of TZD by CF-biochar was a spontaneous, exothermic, physical multilayer adsorption process. Main driving force corresponded to electrostatic attraction and hydrophobic properties. Therefore, the CF-biochar/PMS system was an efficient, promising, and sustainable technology for removing TZD.