催化臭氧化降解含微囊藻毒素污水  

Degradation of microcystin-containing sewage by catalytic ozonation

作　　者：刘宏[1] 黄凯[2] 依成武[1] 吕宾[2] 蔡裕领[2] 

机构地区：[1]江苏大学环境学院,城市水资源与水环境重点实验室江苏大学研究中心,镇江212013 [2]江苏大学环境学院,镇江212013

出　　处：《环境化学》2012年第3期341-347,共7页Environmental Chemistry

基　　金：江苏省自然科学基金(BK2008248)

摘　　要：应用金属氧化物构建催化臭氧化工艺处理含微囊藻毒素污水,比较了不同催化剂的性能差异,分析了催化剂投加量、温度、pH、原水浓度对该工艺的影响.结果表明,选用CuO作催化剂能较好地处理含微囊藻毒素污水.温度与原水浓度对该工艺影响较小;催化剂投加量与pH是该工艺的主要影响因素.实验温度40℃、混合气体流量1.8 L.L-.1min-1、pH=9、催化剂投加量5 g.L-1、处理时间60 min,原水MC-LR去除率达到90%以上、COD去除率达到64%以上.处理20 min,该工艺催化作用去除MC-LR贡献率达到28%、去除COD贡献率达到52%.The process of metal oxide catalytic ozonation was built to treat microcystins-containing sewage.The efficiencies of different oxidation processes were compared,and the main factors such as catalyst dosage,temperature,pH and raw water concentration of the built processes were also analyzed.The results show that CuO is the best catalyst.Temperature and raw water concentration have little impact on the process.Catalyst dosage and pH are the major factors affecting the process.Under the condition of temperature 40 ℃,gas flow rate 1.8 L·L-1·min-1,pH=9,catalyst dosage 5 g·L-1,reaction time 60 min,the raw water removal rate of MC-LR reached above 90% and COD reached above 64%.When the process was operated for 20 min,it was found that the contribution of catalytic reaction to the removal rate of MC-LR was 28% and COD was 52%.

关 键 词：催化臭氧化 金属氧化物 藻毒素 化学需氧量 

分 类 号：X52[环境科学与工程—环境工程]