V. Yu. Glushchenko

Electrochemical Decomposition of Phenylhydrazine on a Fibrous Carbon Electrode

Oxidation of phenylhydrazine by atmospheric oxygen in aqueous solution, its catalytic breakdown in the presence of Aktilen A carbon fiber, and electrochemical decomposition on a polarized carbon fiber were studied. Formation of various organic products of phenylhydrazine breakdown, remaining in solution after oxidation with air and catalytic decomposition on a carbon fiber, was studied by spectroscopy and chromatography. Feasibility of electrochemical decomposition on a carbon fiber for wastewater treatment to remove hydrazine derivatives was examined.

The influence of polarization of the sorbent on sorption of albumin by carbon fibers

The sorption of bovine serum albumin (BSA) on non-charged and polarized surfaces of carbon fibers (ACF) and carbon fibers modified with titanium hydroxide (ACF-Ti) was studied. It was shown that cathodic polarization considerably influences the reversibility of the BSA sorption and decreases the BSA sorption by ACF and ACF-Ti to a larger extent than anodic polarization. A change in the surface charge mainly influences sorption of albumin by ACF-Ti, which is due to different surface properties of the initial and titaniumcontaining adsorbents.

Study of the mechanism of adsorption of weak electrolytes by graphite materials 2. Adsorption of phthalic and anthranilic acid

Conclusions1.A study has been made of the adsorption of phthalic and anthranilic acids from aqueous solutions onto a carbon adsorbent at different values of the solution pH.2.It has been shown that the model for the adsorption of weak electrolytes originally proposed for a monofunctional electrolyte can be extended to bifunctional electrolytes with different substituents with a precision sufficient for practical purposes.

Stochastic model for calculation of diffusion coefficients of adsorbed species in zeolites

Conclusions1.A stochastic method was developed for the calculation of the diffusion coefficients of an adsorbed substance taking into account the arbitrary number of states of the diffusing species.2.The method was used to calculate the diffusion coefficient of methane adsorbed by zeolite 5A. The calculation results do not contradict the experimental data.

Investigation of the molecular-sieve action of adsorbents. Communication 1. Simulation of the mechanism of penetration of molecules into zeolite cavities

Conclusions1.The Monte Carlo method can be replaced by energy minimization for evaluation of the adsorption energy barriers in A zeolite within the framework of the classical theory of intermolecular interactions.2.It is necessary to take into account the mobility of the ions localized in the eightmembered rings connecting the α-cavities in the evaluation of the energy barriers in the case of A-type zeolites.

Selection of a model of the adsorption layer in adsorption of solutions by solids

Conclusions1.A method was proposed for the thermodynamic formalisation of selection of the parameters of an adsorption layer.2.The optimum parameters of the adsorption layer were determined in adsorption of binary solutions on adsorbents with different structures.

Study of the mechanisms of adsorption of weak electrolytes by carbon-graphite materials. Communication 1. Model of the dependence of adsorption of a weak electrolyte on the pH of the solution

Conclusions1.The adsorption of benzoic acid from aqueous solutions on carbon black with different pH of the solution was studied.2.A model of the adsorption of weak electrolytes that satisfactorily describes the dependence of the adsorption on the pH of the medium and considers the degree of its dissociation and the adsorption of hydroxonium and hydroxyl ions was proposed.

Adsorption of aqueous solutions of organic substances Due to induced polarization of graphitized carbon materials. Communication 1. Adsorption and desorption of n-hexanol, cyclohexanol, and nitrobenzene on graphite

Conclusions1.A study has been made of the influence of the polarization potential of graphite on the adsorption properties of alcohols and nitrobenzene in an aqueous electrolyte solutions.2.Feasibility has been demonstrated in principle for reducing the quantity of eluant required to desorb an organic substance, by means of cathodic or anodic polarization of the adsorbent.

Volumenometric investigation of the adsorption of solutions of decan-1-ol in hexadecane on silica gel

Summary1.A method for the volumenometric investigation of the adsorption of solutions by solids has been developed.2.The possibility has been shown of estimating the suitability of various models of an adsorption phase from the experimentally determined values of the relative excess adsorption volumes and the excess adsorption magnitudes.

A voltamperometric study of the adsorption of nitroalkanes on graphite

It has been shown that there is a correlation between the volt-ampere characteristics of nitroalkanes adsorbed on graphite and the values of the thermodynamic parameters calculated from the adsorption isotherm.