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CNAA / Theses / 2006 / June /

The adsorption of surfactants and heavy metales on the carbonic adsorbents


Author: Mihail Ciobanu
Degree:doctor habilitat of chemistry
Speciality: 02.00.04 - Physical chemistry
Year:2006
Scientific consultant: Tudor Lupaşcu
doctor habilitat, professor, Institute of Chemistry of the ASM
Institution:
Scientific council:

Status

The thesis was presented on the 17 June, 2006
Approved by NCAA on the 28 September, 2006

Abstract

Adobe PDF document – 0.43 Mb / in romanian

Thesis

CZU 541.183.02 + 541.183.1 + 541.183.2 + 541.183.5+661.185.1

Adobe PDF document 6.33 Mb / in romanian
223 pages

Summary

The thesis is devoted to studies of sorption of surfactants in water solutions depending on their nature, temperature, concentration, pH as well as electrolyte concentration. These investigations led also to determination of the process and mechanism of sorption derivatives of aniline, phenol and heavy metals on the carbonic adsorbents.

It was shown the fractal dimensions different kind of activated carbons.

The process of transformation of surfactants in water solutions was studied using physical methods, such as NMR and MS. The values of association factors were determined, as well as the nature of intermolecular interactions between the surfactants in solutions and micelles.

It has been established the process of transformation of the surfactants in water solutions.

The process of surfactants hydrolysis in water solutions was studied also.

Bazed on data of Mossbauer spectroscopy of study of the activated carbons AG-3 and AG-5 was established the location of iron.

It was established the relation of the mechanism of adsorption of surfactants on the carbonic adsorbents from different factores (temperature, concentration of surfactants, electrolyte and pH solution).

The mechanism of sorption the derivatives of aniline, phenol and heavy metales on the initial and modified activated carbons was shown.

There were studied the process and elaborated the method of regeneration of used activated carbons.

Were shown the empirical equations of the relation-ships of fractal dimensions the specific surface and mesopore surface of studied activated carbons.