TiO_2-膨润土的投加量对光降解十二烷基苯磺酸钠的影响  

Effect of dose of TiO_2-bentonite on degradation of sodium dodecyl benzene sulfonate

作　　者：温淑瑶[1] 马占青[2] 马敏立[3] 

机构地区：[1]北京师范大学地理学与遥感科学学院,北京100875 [2]杭州职业技术学院化学工程系,浙江杭州310018 [3]北京市十一学校,北京100039

出　　处：《实验技术与管理》2012年第1期42-44,48,共4页Experimental Technology and Management

基　　金：国家基础科学人才培养基金项目(J0630532)

摘　　要：在反应温度20℃、紫外光强度700～750μW/cm2、照射时间2h、电磁搅拌时间2h、溶液初始浓度20mg/L的实验条件下,TiO2-膨润土的投加量对光催化降解十二烷基苯磺酸钠(SDBS)的效果有影响:随着TiO2-膨润土投加量由0.01‰增加到0.5‰,SDBS的降解率逐渐提高,当投加量为0.5‰时,光催化降解率最高,达92%,以后随着投加量的增加(从0.5‰到6‰),降解效率反而下降。可见,最佳投加量为0.5‰。在相同实验条件下,投加0.17‰的TiO2(与0.5‰的TiO2-膨润土中含Ti量相同),SDBS的降解率只有40%。可见,相比TiO2,TiO2-膨润土具有投加量小,降解效率高的优点,更实用。Under the same experiment conditions（the ambient temperature was 20 ℃,the intensity of ultraviolet light was in range of 700—750μW/cm2,electromagnetic stirring speed was constant,reaction under ultraviolet lamp within 2 hours,original concentration of sodium dodecyl benzene sulfonate（SDBS） was 20mg/L）,the dose of TiO2-bentonite affected degradation of SDBS.The more dose of TiO2-bentonite（from 0.01‰ to 0.5‰）,the more SDBS was degraded.The more dose of TiO2-bentonite（from 0.5‰ to 6‰）,the less SDBS was degraded.The optimum dose of TiO2-bentonite was 0.5‰ from that the degradation of SDBS was the most,that was 92%.Under the above experiment conditions,the dose of TiO2 was 0.17,only 40% SDBS was degraded.The content of Ti in 0.17‰TiO2 was equal to that in 0.5‰TiO2-bentonit.The dose of TiO2-bentonite was less than that of TiO2.The degradation of SDBS by TiO2-bentonite was more efficient than that by TiO2.TiO2-bentonite was useful.

关 键 词：十二烷基苯磺酸钠 TiO2-膨润土 紫外光 降解 投加量 

分 类 号：TQ426.1[化学工程]