Removal of Direct Dyes from Textile Wastewater by Means of Combined Methods [Articol]

Abstract

Wastewater discharge by textile factories in natural water is impossible. Being of poor quality with a low biological index (the biochemical consumption of oxygen (BCO)/the chemical consumption of oxygen (CCO) < 0.3), such wastewater is toxic for water organisms. To remove textile dyes from wastewater, various methods are used: neutralization and coagulation [1–2]; electrochemical oxidation [3–5]; and catalytic oxidation by means of hydrogen peroxide [6–9], ozone, or chlorine [10–12].