Purification of aqueous solutions of direct red dye in a photocatalytic membrane reactor

The paper has investigated the processes of water purification of direct red dye using a combined photocatalytic membrane method. It also studied the impact of different grades and doses of the TiO₂ catalyst, duration of UV-radiation, of the (H₂O₂) and the pH of the solution on the retention coefficient of the dye from aqueous solutions. The researchers demonstrated high efficiency of the proposed method when purifying water solutions of the direct red dyes.