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首页> 外文期刊>Journal of Applied Polymer Science >A high Cr (VI) absorption efficiency and easy recovery adsorbent: Electrospun polyethersulfone/polydopamine nanofibers
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A high Cr (VI) absorption efficiency and easy recovery adsorbent: Electrospun polyethersulfone/polydopamine nanofibers

机译：高Cr（vi）吸收效率和易于回收吸附剂：Electrome淘聚醚砜/聚二胺纳米纤维

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摘要

Cr (VI) is a highly toxic pollutant to humans, to achieve high adsorption capacity, easy recovery, and good reusability, polyethersulfone/polydopamine (PES/PDA) ultrafine fibers were prepared successfully. A series of preparing effect factors were investigated systematically and the optimum one is 8.5 pH value at room temperature and 2 g/L dopamine concentration. And then they were used as an adsorbent for the removal of Cr (VI) ions from wastewater. The effect factors pH, the adsorbent dosage, and time were discussed on Cr (VI) adsorption process and the Cr (VI) adsorption behavior was investigated. It is found that the maximum Cr (VI) adsorption capacity is 115.2 +/- 4.8 mg/g at pH = 3 using 0.06 g PES/PDA with 80 mins. The Cr (VI) adsorption process followed the pseudo-second-order model (r(2) >= 0.99) and adsorption isotherms were fitted to the Langmuir model (R-2 >= 0.999). Furthermore, the Cr (VI) adsorption mechanism was supposed according to the X-ray photoelectron spectroscopic results. Finally, PES/PDA ultrafine fibers were considered to be a promising adsorbent with good stability (decomposing temperature, 356 degrees C), high adsorption efficiency (112.1 +/- 2.5 mg/g), and good reusability (three times) on the coexistence of anions and the actual industry wastewater environment.
机译：Cr（VI）是一种对人体有剧毒的污染物，为了获得高吸附量、易回收和良好的重复使用性，成功制备了聚醚砜/聚多巴胺（PES/PDA）超细纤维。系统研究了制备过程中的一系列影响因素，确定了最佳制备条件为室温pH值为8.5，多巴胺浓度为2 g/L。然后将其用作吸附剂，用于去除废水中的六价铬离子。讨论了pH值、吸附剂用量和吸附时间对Cr（VI）吸附过程的影响，并对Cr（VI）的吸附行为进行了研究。研究发现，在pH=3时，使用0.06 g PES/PDA，80分钟时，最大Cr（VI）吸附容量为115.2+/-4.8 mg/g。Cr（VI）的吸附过程遵循伪二级模型（r（2）>=0.99），吸附等温线符合Langmuir模型（r-2>=0.999）。此外，根据X射线光电子能谱结果推测了Cr（VI）的吸附机理。最后，PES/PDA超细纤维被认为是一种很有前途的吸附剂，具有良好的稳定性（分解温度为356摄氏度）、较高的吸附效率（112.1+/-2.5毫克/克），以及在阴离子共存和实际工业废水环境下的良好可再利用性（三次）。

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