Electropurification of Sulfur-Containing Sewage By Electro-oxidizing Desulfurization

摘要

Electropurification processing parameters,characterization, and mechanism of electro-oxidizingdesulfurization for sulfur-contanining wastewater have beeninvestigated and determined. The removal efficiency of sulfidesand chemical oxygen demand (CODcr) are 93 and 85%,respectively, in pilot test solutions containing sulfides of 1.0 and1.1 g L-1 and CODcr of 1.44-1.87 g L-1 with pH 7.0-10.0 at 30℃.The specific energy consumption of the process is 3.95 kWh (kgs)-1. The Fe2+-H2O2 oxidizing agent generated in the solution isresponsible for high efficiency desulfurization by oxidzing HS- or S2- to S.