New catalyst systems for the degradation of chlorophenols Original Research Article

The aim of this study is to investigate new catalyst systems for the oxidative degradation of chlorophenol (CP) derivatives that have been classified as first-degree toxic pollutants. Oxidative degradation and degradation products of chlorinated phenols, namely 4-chlorophenol, 2,4-dichlorophenol and 2,4,6-trichlorophenol, are discussed in detail. Homogenous catalyst systems Fenton [Fe(II)/H2O2] and Fenton-like [Cu(II)/H2O2 and V(IV)/H2O2] methods were employed at higher CP concentrations (1 × 10− 2 mol/L). Heterogeneous catalyst systems titanium dioxide [TiO2/UV] and silver loaded titanium dioxide [Ag-TiO2/UV] processes were also investigated at lower concentrations. Chemical oxygen demand (COD), which is defined as oxygen equivalent of organic matter before and after degradation system was determined.