Treatment of Reverse Osmosis Concentrates Using a Three-dimensional Electrode Reactor

The present work studied, for the first time, the removal of organic pollutants from a reverse osmosis (RO) concentrate by a three-dimensional electrode reactor using γ-Al2O3 /Sn-Sb oxide as particle electrodes. The morphological characterization and composition of the particle electrodes was studied by SEM, XRD and XPS, and the effects of current density and initial pH on the COD removal were investigated. The three-dimensional electrode reactor demonstrated much higher efficiency than that of two-dimensional system, which could remove COD completely in 2 h and kept stable performance after 7 continuous runs, confirming the feasibility for the treatment of RO concentrate.