Monitoring and Degradation of Some Organic Pollutants from Waste Waters Resulting From Textile Industry

Abstract

In this paper some organic pollutants from waste waters resulting from dyeing of
polyacrylic fibres were identified, analyzed and degraded. Disperse and cationic dyes used for
the dyeing of fibres are non-toxic in accordance with the results of the toxicological tests. So,
these dyes can be used in the dyeing process respecting the interdiction of ETAD. These dyes,
synthesized for the first time by the authors, are identified by spectral methods, HPLC and can
be degraded from waste waters by oxidative procedures with hydrogen peroxide or ozone on a
heterogeneous catalyst system and with hydrogen peroxide by the Photo-Fenton advanced
oxidation process. Finally, a comparative study is performed. The UV absorber used for
protection of dyed fibres is analyzed by HPLC and degraded by oxidative methods. The
surfactants used in the washing stages of fibres are identified by spectral analyses, HPLC and
are biodegraded by biological methods or using sorbents. Also, some parameters of the
surfactants, e.g., surface tension (method Wilhemy Plate), wetting power (Draves method) and
foaming power (method Ross Miles), are calculated.