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首页> 外文期刊>RSC Advances >Efficient removal of 17α-ethinylestradiol (EE2) from water using freshly formed Fe–Mn binary oxide
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Efficient removal of 17α-ethinylestradiol (EE2) from water using freshly formed Fe–Mn binary oxide

机译：使用新形成的Fe-Mn二元氧化物有效去除水中的17α-炔雌醇（EE2）

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An in situ formed Fe–Mn binary oxide (FMBO) was successfully fabricated for efficient removal of 17α-ethinylestradiol (EE2) from water. Moreover, manganese oxide (MnO2) and ferric oxide (FeOOH) were also studied for the comparison of EE2 removal efficiency and FMBO showed a better removal capacity towards EE2 than both MnO2 and FeOOH. Various removal conditions including contact time, pH and coexisting ions were investigated. The results showed that the best removal capacity was obtained at pH 6.0 and FMBO rapidly reached a removal efficiency of approximately 96% in 30 min at pH 6.0. The retarded first-order kinetic model was able to simulate the entire removal kinetics (R2 = 0.96). Besides, it was found that the investigated coexisting ions (SO42?, Ca2+, Mg2+, Fe3+) did not have an obvious effect on EE2 removal, while phosphate, carbonate, and manganous ions reduced the removal efficiency, especially phosphate. Fourier transform infrared and X-ray photoelectron spectroscopy results were investigated and they revealed that EE2 was adsorbed through hydrogen bonding and then oxidized by MnO2 on FMBO, which contributed to further degradation of EE2. Besides, the intermediates during removal were studied by gas chromatography-mass spectroscopy, indicating that the products still kept the core ring structure of estrogen while lowering estrogen activity. Above all, FMBO can be used as a promising material to remove EE2.
机译：成功地制备了一种“原位”形成的Fe-Mn二元氧化物（FMBO），用于从水中有效去除17α-炔雌醇（EE2）。此外，还研究了氧化锰（MnO 2 ）和三氧化二铁（FeOOH）的EE2去除效率的比较，FMBO对EE2的去除能力优于MnO。 2 和FeOOH。研究了各种去除条件，包括接触时间，pH和共存离子。结果表明，在pH 6.0时可获得最佳去除能力，而FMBO在pH 6.0的30分钟内迅速达到约96％的去除效率。延迟的一阶动力学模型能够模拟整个去除动力学（ R 2 = 0.96）。此外，还发现研究的共存离子（SO 4 2？ ，Ca 2 + ，Mg 2 + ，Fe 3 + ）对EE2的去除具有明显的影响，而磷酸盐，碳酸盐和锰离子会降低去除效率，尤其是磷酸盐。研究了傅立叶变换红外和X射线光电子能谱结果，结果表明EE2通过氢键吸附，然后被FMBO上的MnO 2 氧化，从而进一步降解。 EE2。此外，通过气相色谱-质谱法研究了去除过程中的中间体，结果表明该产物在降低雌激素活性的同时仍保持雌激素的核心环结构。最重要的是，FMBO可用作去除EE2的有前途的材料。

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