硫酸铁改性活性炭催化微波降解甲基橙的研究  

An Investigation on Microwave Degradation of Methyl Orange in the Presence of Modified Active Carbon Catalyst with Ferric Sulfate

作　　者：张朝红[1] 单亚波[1] 凌洪洁[1] 臧树良[1] 董殿波[1] 郜炜[1] 陈中林[1] 王杰[1] 

机构地区：[1]辽宁大学环境科学系,沈阳110036

出　　处：《染料与染色》2006年第1期37-39,58,共4页Dyestuffs and Coloration

基　　金：国家自然科学基金资助(No.20271024);辽宁省教育厅自然科学基金资助(No.05L154)

摘　　要：在硫酸铁改性活性炭存在下,微波照射能使溶液中的甲基橙迅速降解。对总体积25ml,浓度500mg／L的甲基橙溶液,改性活性炭加入量2．0g／L微波辐射3．0分钟,降解率达76．60％。适当提高活性炭加入量,如3． 0g／L,同样辐射时间可达95．40％。在同样条件下采用未改性活性炭时,其降解率分别为69．53％和90．97％。采用紫外-可见光谱和离子色谱技术探讨了微波辐射时间、甲基橙初始浓度、活性炭用量、改性硫酸铁浓度和溶液酸度对降解甲基橙的影响。Methyl orange could be degraded rapidly under microwave radiation in the presence of a modified active carbon catalyst with ferric sulfate. 76.60% degradation ratio achieved for a 25 mL methyl orange solution with an initial concentration of 500mg/L and 2.0g/L of modified active carbon under 3.0 min microwave radiation, Under the same microwave radiation, the degradation ratio reached 95.40 % if the appropriate amount of modified active carbon increased （e.g.3.0 g/L）. However, the degradation ratios were only 69.53% and 90.97% respectively, if using unmodified active carbon under the same conditions. These results showed that the catalytic activity of the modified active carbon would be obviously better than that of unmodified ones. The effects of microwave radiation time, initial concentration of methyl orange, the amount of modified active carbon, the concentration of ferric sulfate modified solution and the acidity of the solution on microwave degradation of methyl orange in the presence of modified active carbon catalyst were discussed, then adopting UV-vis spectroscopy and ion chromatography technologies.

关 键 词：改性活性炭 催化降解 微波辐射 甲基橙 

分 类 号：X791[环境科学与工程—环境工程]