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首页> 外文期刊>RSC Advances >Efficient activation of persulfate by Fe3O4@β-cyclodextrin nanocomposite for removal of bisphenol A
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Efficient activation of persulfate by Fe3O4@β-cyclodextrin nanocomposite for removal of bisphenol A

机译：Fe3O4 @β-环糊精纳米复合材料有效活化过硫酸盐以去除双酚A

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Experimental studies were conducted to investigate the degradation of bisphenol A (BPA) by using persulfate (PS) as the oxidant and Fe _(3) O _(4) @β-cyclodextrin (β-CD) nanocomposite as a heterogeneous activator. The catalytic activity was evaluated in consideration of the effect of various parameters, such as pH value, PS concentration and Fe _(3) O _(4) @β-CD load. The results showed that 100% removal of BPA was gained at pH 3.0 with 5 mM PS, 1.0 g L ~(?1) Fe _(3) O _(4) @β-CD, and 0.1 mM BPA in 120 min. Further, the catalytic activity of Fe _(3) O _(4) @β-CD nanocomposite was observed as much higher when compared with Fe _(3) O _(4) nanoparticles alone. The sulfate and hydroxyl radicals referred to in the Fe _(3) O _(4) @β-CD/PS system were determined as the reactive species responsible for the degradation of BPA by radical quenching and electron spin resonance (ESR) tests. In addition, the catalyst also possessed with accepted reusability and stability. On the basis of the results of the effect of chloride ions (Cl ~(?) ), β-CD was found to play a crucial role in reducing interference from Cl ~(?) ions, and lead to achieve higher removal efficiency for BPA in Fe _(3) O _(4) @β-CD/PS system. A possible mechanistic process of BPA degradation was proposed according to the identified intermediates by gas chromatography-mass spectroscopy (GC-MS).
机译：以过硫酸盐（PS）为氧化剂，以Fe _（3）O _（4）@β-环糊精（β-CD）纳米复合材料为非均相活化剂，对双酚A（BPA）的降解进行了实验研究。考虑到各种参数的影响，例如pH值，PS浓度和Fe_（3）O_（4）@β-CD负载，评价了催化活性。结果表明，在120分钟内，用5 mM PS，1.0 g L〜（？1）Fe _（3）O _（4）@β-CD和0.1 mM BPA在pH 3.0时100％去除了BPA。此外，与单独的Fe _（3）O _（4）纳米颗粒相比，Fe _（3）O _（4）@β-CD纳米复合材料的催化活性更高。通过自由基猝灭和电子自旋共振（ESR）测试，将Fe _（3）O _（4）@β-CD/ PS系统中提及的硫酸根和羟基自由基确定为负责BPA降解的反应性物种。另外，该催化剂还具有公认的可重复使用性和稳定性。根据氯离子（Cl〜（？））的作用结果，发现β-CD在减少Cl〜（？）离子的干扰中起着关键作用，并导致BPA的去除效率更高。在Fe _（3）O _（4）@β-CD/ PS系统中。根据气相色谱-质谱法（GC-MS）鉴定出的中间体，提出了双酚A降解的可能机理。

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