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首页> 外文期刊>International Journal of Environmental Science and Technology >Construction of sodium dodecyl sulfate-modified graphene sheets with enhanced adsorption performance for Fe(III) and Al(III) removal
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Construction of sodium dodecyl sulfate-modified graphene sheets with enhanced adsorption performance for Fe(III) and Al(III) removal

机译：用Fe（III）和Al（III）的吸附性能提高吸附性能的十二烷基硫酸钠改性石墨烯片的构建

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In this work, graphene modified with sodium dodecyl sulfate was used to remove Fe (III) and Al (III) from wastewater. Morphological and spectrophotometrical characterization was done to confirm synthesis. Modified graphene performance was studied; pH effect, time of maximal sorption, maximal concentration of absorbent and concentration of ions were studied, as well. Sorption kinetic studies and isotherm models were applied to know the sorption process spontaneity and carried out to evaluate theoretical characteristic rates and possible adsorption mechanisms. Scanning electron microscopy, transmission electron microscopy, and X-ray diffraction studies revealed that graphene surface was successfully modified with sodium dodecyl sulfate, which also was confirmed by Fourier transform infrared spectroscopy. Optimal pH for removal of Al (III) and Fe (III) was 8. The time of maximal adsorption for both ions was 120 min, and the best dose of graphene modified with sodium dodecyl sulfate for their sorption was 0.1 g/L values for Fe (III) and Al (III), indicating that adsorption was favorable. 1/n values revealed cooperative adsorption. The model of adsorption of Fe (III) and Al (III) fits better to Langmuir than the Freundlich model. It was found that graphene modified with sodium dodecyl sulfate sorption's kinetic model fits with pseudo-second order for Al (III) and Fe (III).
机译：在这项工作中，用十二烷基硫酸钠改性的石墨烯用于除去废水中的Fe（III）和Al（III）。进行形态学和分光度体表征以确认合成。研究了改性石墨烯性能;研究了pH效果，研究了最大吸附的时间，研究了最大浓度的吸收剂和离子浓度。吸附动力学研究和等温模型用于了解吸附过程自发性，并进行了理论特征性率和可能的吸附机制。扫描电子显微镜，透射电子显微镜和X射线衍射研究表明，用十二烷基硫酸钠成功改性石墨烯表面，其也通过傅里叶变换红外光谱证实。用于去除Al（III）和Fe（III）的最佳pH为8.对于两个离子的最大吸附时间为120分钟，并且用十二烷基硫酸钠改性其吸附的最佳剂量的石墨烯为0.1g / L值Fe（III）和Al（III），表明吸附是有利的。 1 / N值显示合作吸附。 Fe（III）和Al（III）的吸附模型比Freundlich模型更适合Langmuir。结果发现，用十二烷基硫酸钠吸附的动力学模型改性石墨烯，适用于Al（III）和Fe（III）的伪二次阶。

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