Research On Catalysis Oxidative Degradation Of H-acid Analog Wastewater

Firstly, we use hydrogen peroxide as oxidant and ferroussulfate as catalyst to homogeneous catalysis oxidize H-acid analog wastewater, which is one of dyestuff intermediate .According to the results of orthogonal test and single-element test ,we discover that the COD removal of 300 ml H-acid analog wastewater , whose concentration is 10g/l , approach to 75. 2% when the reaction condition is 33ml consumption of hydrogen peroxide, 60min, 140°C and 3.5 PH value. Subsequently, by screening process for six single constituent (Mn, Fe, Co, Ni, Cu and Ce) loaded catalysts and five two-component (Mn-Ce, Fe-Ce, Co-Ce, Ni-Ce, Cu-Ce) loaded catalysts which are calcined for six hours in four-hundred centigrade, we discover that Mn and Cu single constituent have 91. 5% and 93.7% COD removal of catalysis activity in the catalysis oxidative degradation of H-acid analog wastewater, and in the reaction oxygen is used for oxidant andγ-Al₂O₃ for catalyst carrier. For correlative documents disclose that Cu is easily dissolved as catalyst, then we concentrate upon Mn single constituent catalyst by change the temperature of reaction, the PH value of analog wastewater and the oxygen pressure. By experiments on the three main factors, we study their impact on the H-acid degradation effect, and then make a compositive analysis for the mensuration results of catalyst specific area and XRD. Finally, according to experiments results and correlative documents, we make a simple discussion about H-acid degradation kinetics , in which H-acid is degraded by two-step, accumulation and decomposition of acid, and the main function of Mn catalyst is to improve the rate constant of the second step of H-acid degradation. Meanwhile, by linear fitting rate constant on different temperature, reaction activation energy Ea and apparent frequency factor is determined: Ea=22.3KJ/mol and k₀=3.16min^-1, rate equation is further determined: ln[COD]=ln[COD₀]-0.0096t...