Photocatalytic Treatment of Wastewater Containing Simultaneous Organic and Inorganic Pollution: Competition and Operating Parameters Effects

In the present study, methylene blue (MB) removal from aqueous solutions via photocatalytic process using TiO2 as a catalyst in presence of external ultra-violet light (UV) was investigated. The results adsorption absence UV radiation showed that reached an equilibrium state at 60 min. experimental kinetic data were found to be well fitted by pseudo-second-order model. Furthermore, isotherm study suggested dye uptake is chemisorption with maximum retention capacity 34.0 mg/g. photodegradation MB then assessed under various conditions. related mineralization decreased when concentrations increased and favored high pH values low salt concentrations. simultaneous organic inorganic pollution (Zinc) also evaluated. effect molar ratio Zn2+/MB+ solution different NaCl monitored. corresponding Zn2+ (30 mg/L), became faster until reaching optimum 60/60 mg/L; it slowed down for higher solutions’ carbon contents measured during degradation total after about 5 h optimal condition.