Comparative Evaluation of the Structure and Properties of Certain Granulated and Fibrous Activated Carboniferous Sorbents

Abstract

This paper presents the results of the comparative evaluation of the structure and sorption properties of fibrous (AYBM-MH) and granulated (CKH-IK) carboniferous sorbents. The structure of sorbents was investigated using scanning electron microscopy (SEM) and electron paramagnetic resonance (EPR), while the sorpiton properties were studied through application of adsorption-desorption of markers (medinal, creatinine, uric acid, vitamin B₁₂). Carbon fiber sorbents have been found to possess more favorable characteristics of the sorptive capacity and a better porous structure. The EPR spectrum of a fibrous sorbent contains the signal in the form of a solitary line with a g-factor of 2.0025 ± 0.0003, while the granulated sorbent has no signal. Such properties of fibrous sorbents as nontoxicity, biological compatibility, variety of textile patterns, elasticicity, strength, etc. promote their application in capacity of versatile, high-quality medical materials.

Due to their compatibility with blood cells and body tissue, spherical sorbents found extensive application in the clinical practice (1,2). However, considering the potential application of sorbents in modern medicine (hemosorption, enterosorption, application therapy) it is important that sorbents with improved sorption, kinetic and other operational characteristics be developed.

The results presented demonstrate properties of granualted and fibrous sorbents produced using different technologies and source materials. Also indicated are the differences related to the pattern of sorbents.

Key Words:

• structure
• properties
• sorbent
• carbon fiber