Determination of rational conditions of preliminary ozonation of nonionic polyethoxylated surfactants before biosorption

摘要

abstract_textpThe influence of preliminary oxidation of nonionic surfactants solutions on the biosorption efficiency of activated carbon was investigated. The Gibbs free energy of adsorption (-Delta G degrees(a)) of oxidation products from water on an activated carbon was used as a parameter of the bacterial resistance of oxidation products adsorption. It was established for nonionic surfactants, that ozonation essentially raised the contents of nonionic surfactant homologues with a low degree of ethoxylation. It leads to the increase in the Gibbs free energy of oxidation products adsorption and to inhibition of biodegradation process./ppIt was shown that the efficiency of biosorption process after preliminary ozonation was 2-3 times lower than without preliminary treatment that correlated with changes of the free energy of adsorption./p/abstract_text