摘要
The results of a study of sorption properties of native and modified materials of polysaccharide and polyamide nature are presented, and the physicochemical regularities of the distribution of d-metals in a “biopolymer–aqueous solution” heterophase system have been established. The experimental sorption isotherms were analyzed within the framework of the Langmuir, Freundlich, and Dubinin–Radushkevich models. The sorption kinetics is most correctly described by the pseudo-second-order model. The influence of various factors affecting sorption efficiency such as temperature, mixing rate and others was examined. The effect of the environment pH on the sorption of heavy-metal ions onto polysaccharide and polyamide sorbents was observed. A number of regularities of the competitive sorption process of М2+/Н+ cations within the acid pH region with the involvement of various functional groups was established. The prospects are determined for the use of polysaccharide and polyamide biosorbents modified by employing new techniques that include a directional modification of surface properties based on the “structure–sorption activity” relationship.
摘要译文
提出了多糖和聚酰胺性质的天然和修饰材料的吸附性能研究的结果，并确定了“生物聚合物 - 水溶液”中D-金属分布的物理化学规律性。在Langmuir，Freundlich和Dubinin – Radushkevich模型的框架内分析了实验吸附等温线。伪秒模型最正确地描述了吸附动力学。检查了影响吸附效率的各种因素，例如温度，混合速率和其他因素。观察到了环境pH对重金属离子在多糖和聚酰胺吸附剂上吸附的影响。建立了各种官能团的参与。确定前景是使用通过使用新技术修饰的多酰胺和聚酰胺生物吸附剂，其中包括基于“结构 - 吸附活性”关系的表面特性的定向修饰。
Nikiforova; T. E.[1];Gabrin; V. A.[1];Razgovorov; P. B.[2]. Peculiarities of Sorption of Heavy-Metal Ions by Polysaccharide and Polyamide Biopolymers[J]. Protection of Metals and Physical Chemistry of Surfaces, 2023,59(3): 313-324