STABILIREA PROPRIETĂŢILOR ACIDO-BAZICE ALE CĂRBUNILOR ACTIVI

Raisa NASTAS, Vasile RUSU, Tudor LUPAŞCU Institutul de Chimie al AŞM

Abstract

EVALUATION OF ACTIVE CARBONS ACID-BASIC PROPERTIES

The methodological peculiarities of visual titration method (Boehm method) and electrometric (alkalimetric and acidimetric titrations) for researching of acid-basic properties of carbonaceous adsorbents have been specified. On the surface of active carbons obtained by physical-chemical method of activation the basic sites predominate being recom-mended acidimetric conductometric titration for their determination. Besides of such groups there are also acidic sites being recommended alkalimetric pH-metric back titration for their determination. On the surface of active carbons obtained by chemical activation the acidic groups predominate being recommended alkalimetric conductometric titration for their determination. Besides of such groups there are also basic sites being recommended acidimetric pH-metric back titration for their determination. Keywords: active carbons, functional group, surface chemistry, electrochemical titration.