Equilibrium and Kinetic Characteristics of Tryptophan Sorption onto FIBAN A-1 Fiber

IF 1.1 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING Protection of Metals and Physical Chemistry of Surfaces Pub Date : 2023-11-24 DOI:10.1134/S2070205123701010

E. A. Azarova, I. V. Voronyuk, T. V. Eliseeva

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Abstract

In the present study, the possibility of using a strong-base fibrous material FIBAN A-1 (Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus, Belarus) as a sorbent to remove tryptophan from aqueous solutions is investigated. The capacity characteristics of the anion exchangers in the form of granules and fibers containing quaternary ammonium bases as functional groups with respect to the chosen amino acid are analyzed. The influence of the pH of the medium on the sorption of amino indolylpropanoic acid onto the A-1 fiber is determined. IR spectroscopy confirms the fact of the fixation of amino acids from solutions with pH ~5.0–5.5 due to the charge exchange of the zwitterion by the OH groups of the sorbent. The specific features of both the equilibrium and kinetics of tryptophan sorption from solutions with a pH close to the isoelectric point are studied. Based on the analysis of the isotherms of sorption of the amino acid at different temperatures, a monomolecular mechanism of the sorptive sorption process and its endothermic character are established. The kinetic characteristics of tryptophan sorption indicate a significant contribution of external diffusion to the velocity of the investigated process.

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色氨酸在FIBAN A-1纤维上吸附的平衡和动力学特性

摘要:在本研究中，研究了使用强碱纤维材料FIBAN a -1(白俄罗斯国家科学院物理有机化学研究所)作为吸附剂从水溶液中去除色氨酸的可能性。分析了以季铵基为官能团的颗粒和纤维形式的阴离子交换剂对所选氨基酸的容量特性。测定了培养基的pH值对A-1纤维吸附氨基吲哚基丙酸的影响。红外光谱证实，在pH ~5.0 ~ 5.5的溶液中，由于两性离子与吸附剂的OH基团交换电荷，氨基酸被固定。研究了色氨酸从pH值接近等电点的溶液中吸附的平衡和动力学的具体特征。通过分析氨基酸在不同温度下的吸附等温线，建立了吸附过程的单分子机理及其吸热特性。色氨酸吸附的动力学特征表明，外部扩散对所研究过程的速度有重要贡献。

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来源期刊

Protection of Metals and Physical Chemistry of Surfaces 工程技术-冶金工程

CiteScore

1.90

自引率

18.20%

发文量

审稿时长

4-8 weeks

期刊介绍： Protection of Metals and Physical Chemistry of Surfaces is an international peer reviewed journal that publishes articles covering all aspects of the physical chemistry of materials and interfaces in various environments. The journal covers all related problems of modern physical chemistry and materials science, including: physicochemical processes at interfaces; adsorption phenomena; complexing from molecular and supramolecular structures at the interfaces to new substances, materials and coatings; nanoscale and nanostructured materials and coatings, composed and dispersed materials; physicochemical problems of corrosion, degradation and protection; investigation methods for surface and interface systems, processes, structures, materials and coatings. No principe restrictions exist related systems, types of processes, methods of control and study. The journal welcomes conceptual, theoretical, experimental, methodological, instrumental, environmental, and all other possible studies.