Catalytic ozonation of azo dye active brilliant red X-3B in water with natural mineral brucite

摘要

Natural mineral brucite was used directly in catalytic ozonation of dye wastewater of active brilliant red X-3B.Compared with single ozonation,degradation of X-3B increased from 47% to 89%,and removal rate of COD increased from 9% to 32.5% in catalytic ozonation for 15 min.The catalytic ozonation of X-3B followed a direct oxidization mechanism by ozone molecule,and this was actually a homogeneous catalysis of OH~- due to dissolution of Mg(OH)2 from natural brucite.As a natural mineral catalyst,brucite has supplied an economical and feasible choice for catalytic ozonation of X-3B in industrial wastewater.