Experimental investigation of new photocatalytic continuous coaxial cylinder reactor for elimination of linear alkylbenzene sulfonic acid from waste water using nanotechnology

In this research, TiO2/UV photocatalytic degradation of linear alkylbenzene sulfonic acid (LAS) was examined in aqueous solution. The process was performed in a continuous reactor with coaxial cylinders. The nanoparticles were deposited on two natural polymer bases, cotton and wool. The inner cylinder of the polymer textile was covered. The contaminant solution was passed through cylinders. The removal process of photocatalytic LAS was more efficient than the UV irradiation. Wool base illustrated more significant removal efficiency than cotton base. The system was able to remove 86% of pollutants in approximately 100 min. The reactor could work with either the recycle flow or greater residence time. It was concluded that there was slight difference between increasing the residence time of contaminant solution in a single pass of reactor and the recycling flow.