Abstract

In this study, polyaniline (PANI) is prepared by means of chemical oxidization polymerization and directly loaded on the modified fiber ball (m-FB) to obtain macroscale polyaniline/modified fiber ball (PANI/m-FB) composite, and then its removal ability of Cr(VI) is investigated. The effects of different parameters such as contact time, pH value and initial concentration on Cr(VI) removal efficiency are discussed. The experimental results illustrate that the favorable pH value is 5.0 and the maximum removal capacity is measured to be 293.13 mg g⁻¹. Besides, PANI/m-FB composites can be regenerated and reused after being treated with strong acid. The kinetic study indicates that the adsorption procedure is mainly controlled by chemical adsorption. More importantly, the macroscale of composites can avoid secondary pollution efficiently. Benefiting from the low cost, easy preparation in large scale, environmentally friendly, excellent recycling performance as well as high removal ability, PANI/m-FB composites exhibit a potential possibility to remove Cr(VI) from industrial waste water.

Graphic Abstract

The polyaniline (PANI) was coated on modified fiber ball (m-FB) to remove Cr(VI) in waste water, and this kind of PANI/m-FB composites can avoid secondary pollution efficiently due to its macrostructure. Furthermore, the removal capacity can reach to 291.13 mg/g and can be multiple reused.

中文翻译：

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改性纤维球上聚苯胺涂层的合成及其在Cr（VI）去除中的应用

摘要

本研究采用化学氧化聚合法制备聚苯胺（PANI），直接负载在改性纤维球（m-FB）上，得到大尺寸聚苯胺/改性纤维球（PANI / m-FB）复合材料，然后去除。研究了Cr（VI）的能力。讨论了接触时间，pH值和初始浓度等不同参数对Cr（VI）去除效率的影响。实验结果表明，有利的pH值为5.0，最大去除容量为293.13 mg g ^-1。此外，经强酸处理后，PANI / m-FB复合材料可以再生和再利用。动力学研究表明，吸附过程主要受化学吸附控制。更重要的是，复合材料的宏观规模可以有效避免二次污染。PANI / m-FB复合材料得益于低成本，易于大规模制备，环保，优异的回收性能以及高去除能力，因此具有从工业废水中去除Cr（VI）的潜在可能性。

图形摘要

将聚苯胺（PANI）涂覆在改性纤维球（m-FB）上以去除废水中的Cr（VI），这种PANI / m-FB复合材料由于其宏观结构而可以有效避免二次污染。此外，去除能力可以达到291.13 mg / g，并且可以多次重复使用。