Abstracto

Treatment Of Wastewaters Containing 2-Nitroaniline And 2-Chloroaniline By BDD-Anodic Oxidation And Ozonation

Bensalah Nasr, Ahmadi Mohamed Faouzi, Gadri Abdelatif

In this work, synthetic wastes polluted with 2-nitroaniline (2-NA) and 2- chloroaniline (2-ClA) have been treated with BDD-anodic oxidation and ozonation. The two technologies are able to successfully mineralize over 90 % the wastes polluted with aniline derivatives. BDD-anodic oxidation using divided electrochemical cell leads to the formation of carbon dioxide as final product. Using single-compartment electrochemical cell, only 70 % of organic carbon is transformed to CO2 and in addition a solid effluent is formed. The COD evolution with specific electrical charge passed is linear at beginning of electrolyses and becomes exponential for very low concentrations. During ozonation treatment, the exponential decrease of COD with time can be explained by first-order chemical kinetics.