Abstract

The paper presents sorption behavior of Arachis hypogaea shells towards silver ions and possibility of their use as antimicrobial product. During the modification process of the natural sorbent, equilibrium tests were carried out. Moreover, the possibility of obtaining biocomposite Arachis hypogaea shells/nAg has been determined, and its antimicrobial properties have been evaluated. Additionally, sorption kinetics has been calculated. In the last step, silver ions were desorbed. The conducted equilibrium tests allowed to adjust the sorption isotherm model and determine the sorption capacity of tested material. This process is best described by Freudlich’s isotherm, and the sorption capacity is equal to 12.33 mg/g. On the basis of kinetic studies, the chemical nature of this process has been proved (by choosing a pseudo-second order model for the sorption process). It has been confirmed that the obtained peanut shells modified with silver ions have antimicrobial properties. The tests allowed to obtain 100% inhibition of Aspergillus niger and ~ 98% Escherichia coli.

中文翻译：

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花生壳对 Ag+ 离子的吸附行为及产品抗菌性能的评估。

 抽象的

本文介绍了花生壳对银离子的吸附行为及其用作抗菌产品的可能性。在天然吸附剂的改性过程中，进行了平衡测试。此外，还确定了获得花生壳/nAg生物复合材料的可能性，并对其抗菌特性进行了评估。此外，还计算了吸附动力学。在最后一步中，银离子被解吸。进行的平衡测试可以调整吸附等温线模型并确定测试材料的吸附能力。 Freudlich 等温线最好地描述了该过程，吸附容量等于 12.33 mg/g。在动力学研究的基础上，该过程的化学性质已被证明（通过为吸附过程选择伪二阶模型）。经证实，所得银离子改性花生壳具有抗菌性能。测试可实现对黑曲霉100% 抑制和对大肠杆菌98% 抑制。