Abstract

Abstract. The paper considers applications of foamed glassy phosphate materials as carriers of biologically active substances. The atomic layer deposition method allowed chemically synthesizing surface-modified composite materials based on graphite and carbon fibers, which maximally preserved the activity of enzymes and biologically active substances. The synthesis process of a mono-layer titanium-containing coating on the surface of graphite and carbon fibers by processing them with TiCl4 vapors is considered. The main characteristics of the graphite surface before and after modification and characteristics of the porous structure and surface of carbon fibers are obtained. Biologically active substances by adsorption from a solution to the surface of both the original and modified carriers were applied. biological activity and temperature stability of the obtained composite materials were studied. It is shown that the activity of a biologically active substance depends on the chemical composition and state of the surface of carbon-based carriers.

Highlights

  • Environmental problems have acquired a global character and are expressed in irreversible changes in the conditions of human existence

  • These results indicate a low sorption activity of the studied carbon fibers

  • With an increase in the number of cycles of graphite surface treatment by the atomic layer deposition (ALD) method, the number of active functional groups of the surface decreases, which leads to a decrease in the amount of adsorbed enzyme

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Summary

Introduction

Environmental problems have acquired a global character and are expressed in irreversible changes in the conditions of human existence. Used technologies for cleaning territories and eliminating oil spills have a number of disadvantages: firstly, the toxic effect of sorbents on the soil, and the need to collect the sorbent from the surface to be cleaned and its disposal, and secondly, the mandatory implementation of a number of measures for additional soil restoration [2]. Taking into account these shortcomings and on the basis of previously performed studies [3], the biosorbent "BIAVA" was developed and patented, which is a porous sorbent carrier on the surface of which there are microorganisms-destructors of hydrocarbons and catalysts of biooxidation processes [4]

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