A novel polyaniline@Almond shell (PANI@AS) biocomposite was synthesized via facile in situ chemical polymerization method. The as-synthesized adsorbent was characterized using various analytical techniques such as Fourier transform infrared spectroscopy (FTIR), X-ray energy dispersive spectroscopy (EDS), scanning electron microscopy (SEM), and potentiometric titration. A batch adsorption system was applied with the aim of investigating as-synthesized adsorbent ability to remove Cr(VI) ions and Orange G (OG) textile dye from aqueous solutions. Obtained results revealed that adsorption process was strongly depended upon the physicochemical parameters. The adsorption of Cr(VI) and OG dye onto PANI@AS was better described by the pseudo second-order-kinetic model and followed the Freundlich isotherm model. The maximum uptakes were 335.25 for Cr(VI) and 190.98 mg g-1 for OG dye. We further evaluated that PANI@AS biocomposite could be regenerated easily with NaOH solution and efficiently reused for Cr(VI) and OG dye removal from aqueous media. Thus, these results indicated the potential practical application of PANI@AS biocomposite for wastewater treatment.

中文翻译：

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精心设计新型的聚苯胺@杏仁壳生物复合材料，可从水溶液中有效去除六价铬离子和橙色G染料。

通过简便的原位化学聚合方法合成了一种新型的聚苯胺@杏仁壳（PANI @ AS）生物复合材料。合成后的吸附剂使用多种分析技术进行了表征，例如傅立叶变换红外光谱（FTIR），X射线能量色散光谱（EDS），扫描电子显微镜（SEM）和电位滴定法。为了研究合成后的吸附剂从水溶液中去除Cr（VI）离子和Orange G（OG）纺织染料的能力，应用了分批吸附系统。所得结果表明，吸附过程在很大程度上取决于理化参数。假二阶动力学模型和遵循Freundlich等温线模型可以更好地描述Cr（VI）和OG染料在PANI @ AS上的吸附。最大摄取量为335。Cr（VI）为25，OG染料为190.98 mg g-1。我们进一步评估了PANI @ AS生物复合材料可以轻松地用NaOH溶液再生，并有效地用于从水性介质中去除Cr（VI）和OG染料。因此，这些结果表明了PANI @ AS生物复合材料在废水处理中的潜在实际应用。