纳米TiO_2协同辐射处理造纸废水  

Gamma irradiation treatment of paper mill effluent in with TiO_2 nano particles

作　　者：何仕均[1] 谢雷[1,2] 王建龙[1] 李坤豪[1,2] 龚文琪[2] 

机构地区：[1]清华大学核能与新能源技术研究院,北京100084 [2]武汉理工大学资源与环境工程学院,武汉430070

出　　处：《清华大学学报（自然科学版）》2008年第12期2096-2098,2109,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(50678089)

摘　　要：研究了纳米TiO2协同γ辐射处理造纸废水的影响因素和可行性。试验分别以造纸原水、厌氧出水、好氧出水作为处理对象,采用P25型纳米TiO2和60Co辐射装置。试验发现:γ辐射对造纸原水的处理效果良好,在吸收剂量为1 kGy时化学需氧量(COD)的去除率达到29.5%;纳米TiO2的加入和纯氧曝气能明显提高对造纸废水的处理效果。当纳米TiO2的投加量为1g/L、曝气量(纯氧)为0.5L/min、吸收剂量为1 kGy时,组合工艺对原水、厌氧出水、好氧出水的COD去除率分别提高到68.85%、50.0%和42.86%。The factors influencing 7 irradiation treatment of paper mill effluent with TiO2 nano particles （Degussa, P-25 type） before and after biological treatment were investigated experimentally. The sample effluents were irradiated in a ^60Co γ irradiation facility. The results show that γ irradiation at an absorbed dosage of 1 kGy can be used to effectively treat high strength paper mill effluents with a chemical oxygen demand （COD） removal efficiency of 29. 5%. The addition of 1 g/L TiO2 nano particles in combination with 0.5 L/min pure oxygen aeration and 1 kGy γ irradiation significantly enhances the treatment of the paper mill effluent, with a COD removal efficiency of 68.85% for the paper mill influent, 50.0% for an anaerobic effluent and 42.86% for an aerobic effluent.

关 键 词：造纸废水 纳米二氧化钛 光催化 Γ辐射 

分 类 号：X703[环境科学与工程—环境工程]