Keratin nanoparticles: synthesis and application for Cu(II) removal

Seyedeh Zahra Mousavi; Mehrdad Manteghian; Seyed Abbas Shojaosadati; Hassan Pahlavanzadeh

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Keratin nanoparticles: synthesis and application for Cu(II) removal

机译：角蛋白纳米颗粒：去除Cu（II）的合成与应用

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A straightforward procedure to synthesize keratin nanoparticles (KNP) from chicken feathers was introduced. The characterization of the synthesized nanoparticles was done using Fourier transform infrared (FTIR) spectroscopy, dynamic light scattering (DLS), X-ray diffraction (XRD) patterns and transmission electron microscopy (TEM). The FTIR analysis revealed no significant chemical change after the nanoparticle synthesis. TEM imaging indicated the synthesis of KNPs with a spherical morphology and mean size of 42 nm. The DLS results indicated that the synthesized KNPs were stable in aqueous media by having a zetapotential of lower than -30 mV. The produced KNPs were then evaluated for the biosorption of Cu (II) from aqueous solutions. The analyzed adsorption isotherm data revealed the change from a Redlich-Peterson isotherm to a Langmuir one by increasing the biosorbent dosage, which could be attributed to the more prepared adsorption sites. The experiments of the effect of the biosorbent dosage suggested the best removal at a KNP dose of 3.0 g/L. At this dosage, the maximum Cu (II) adsorption capacity and Langmuir constant were 50 mg/g and 10.8×10-3 L/mg, respectively; the adsorption kinetic followed the pseudo-second order model.

机译：介绍了一种从鸡毛中合成角蛋白纳米粒子（KNP）的简单方法。使用傅立叶变换红外（FTIR）光谱，动态光散射（DLS），X射线衍射（XRD）模式和透射电子显微镜（TEM）对合成的纳米颗粒进行表征。 FTIR分析显示纳米粒子合成后无明显化学变化。 TEM成像表明合成的KNP具有球形形态，平均大小为42 nm。 DLS结果表明，合成的KNP具有低于-30mV的ζ电位，在水性介质中是稳定的。然后评估产生的KNP对水溶液中Cu（II）的生物吸附。分析的吸附等温线数据表明，通过增加生物吸附剂剂量，可以使Redlich-Peterson等温线变为Langmuir等温线，这可以归因于吸附位点更多。生物吸附剂剂量效果的实验表明，在KNP剂量为3.0 g / L时，去除效果最好。在此剂量下，最大的Cu（II）吸附能力和朗缪尔常数分别为50 mg / g和10.8×10-3 L / mg;吸附动力学遵循伪二级模型。

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《Advances in Environmental Technology》 |2018年第2期|共11页
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Seyedeh Zahra Mousavi; Mehrdad Manteghian; Seyed Abbas Shojaosadati; Hassan Pahlavanzadeh;
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Keratin nanoparticles: synthesis and application for Cu(II) removal

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