微波和催化剂联合作用对污染土壤中石油烃去除的影响  

Microwave radiation and catalyst integrated effect on the removal of petroleum hydrocarbon in contaminated soils

作　　者：吴丹[1] 李法云[1,2] 谯兴国 张营[1,2] 李霞[1,2] 马溪平[1] 

机构地区：[1]辽宁大学环境学院,沈阳110036 [2]湖南农业大学资源环境学院,长沙410128 [3]辽宁营口沿海产业基地管委会产业投资发展局,辽宁营口115003

出　　处：《安全与环境学报》2009年第1期51-53,共3页Journal of Safety and Environment

基　　金：国家自然科学基金项目(30570342);国家重点基础研究发展计划项目(2004CB418506);国家教育部留学回国人员科研启动基金项目(教外司留[2005]383号);辽宁省高校污染控制与环境修复重点实验室与辽宁省环境保护开放实验室联合开放基金

摘　　要：采用微波加热技术,微波频率2 450 MHz、额定微波输出功率400 W、压力0.2 MPa条件下,分别添加催化剂活性炭C、Fe_3O_4和TiO_2,去除污染土壤中的石油烃。结果表明,添加3种催化剂后,微波作用下土壤中石油烃的去除效果显著提高。Fe_3O_4和C加入量为0.2%时,石油烃去除效果最好;TiO_2加入量为0.5%时,石油烃具有最佳去除效果。TiO_2作催化剂时的最佳微波辐射时间为5 min,C和Fe_3O_4为7 min。土壤含水量是影响石油烃去除的重要因子,土壤含水量为16%～20%时,石油烃去除效果最好。TiO_2作催化剂、微波辐射7min、土壤含水量16%时,石油烃的去除率最高,可达84.5%。微波加热和催化剂联合作用可增强污染土壤中石油烃的去除,对石油污染土壤有一定修复作用,具有一定应用前景。This paper intends to present its authors＇ research results over the integrated effect of microwave radiation and catalyst on the removing of hydrocarbon contaminants from the soil, including the activated carbon （C）, Fe304 and TiO2.The operational conditions we have adopted can be described as follows： the microwave frequency is 2 450 MHz; the rated microwave output power is 400 W at the pressure of 0.2 MPa. The influence of the quantity of catalyst, the irradiation length of time of the microwave used and the soil water content on the actual removing results have also been investigated in turn. The actual results gained from our experimental study can be shown as follows： the removal efficiency of petroleum hydrocarbons in the contaminated soil has been remarkably increased due to the addition of 3 different kinds of catalyst, including activated carbon （C）, Fe3O4 and TiO2. We have also found that the optimum removal efficiency of petroleum hydrocarbon contaminants can be obtained when the dosage of Fe3O4 and C contents was adopted at 0.2 % , while that of TiO2 was 0.5%, respectively. In addition, the optimum irradiation time should be 5 min for TiO2 and 7 min for C and Fe3O4 respectively. The other important influential factor that may affect the removal effect is the the soil water content. The optimum water content is 16% - 20 % . With the optimal dosage of the 3 catalysts and irradiation time for 7 minutes, the ideal removal efficiency of petroleum hydrocarbon contaminants can be gained is 84.5% when TiO2 is used as the catalyst.

关 键 词：环境工程 微波 催化剂 污染土壤 石油烃 

分 类 号：X53[环境科学与工程—环境工程]