废水处理中含锰催化剂催化臭氧化的研究

Study on Catalytic Ozonization of Manganese-containing Catalysts in Wastewater Treatment

通过在臭氧化反应中引入含锰催化剂,对其反应的催化效果进行比较研究。实验结果表明含锰催化剂对模拟污染物X3B具有较高的降解活性,当X3B浓度为1×10^(-4)mol·L^(-1),臭氧发生器气量为0.6 L·min^(-1)时,催化剂的加入使降解动力学常数提高至0.0285 min^(-1),较单纯臭氧化有显著提高。通过羟基自由基捕获剂在反应体系中的加入,对催化臭氧化机理进行研究,结果表明污染物的去除主要由催化产生的羟基自由基的氧化作用和臭氧氧化作用两方面影响。

The catalytic effect of manganese- containing catalysts on ozonization of wastewater was studied byintroducing it into the ozone oxidation process. The experimental results showed that catalysts containing manganese had ahigher degradation activity on the simulated pollutant X3B. When the concentration of X3B was 1×10-4mol·L-1and ratioof ozone generator set at 0.6 L·min-1, the degradation kinetics constant increased to 0. 0285 min-1 which wassignificantly higher than that of simple ozonization. The mechanism of the catalytic ozonization was also studied by addinghydroxyl radical scavenger in the reaction system. The results showed that the removal of pollutants was mainly influencedby the oxidation of hydroxyl radicals and the oxidation of ozone.