磺胺二甲嘧啶在土壤中的吸附和光催化降解作用  

Adsorption and Photocatalytic Degradation of Sulfamethazine in Soil

作　　者：张元[1] 许婧文[1] 梁巍[2] 薛爱芳[1] 陈浩[1] 

机构地区：[1]华中农业大学理学院,武汉430070 [2]华中农业大学资源与环境学院,武汉430070

出　　处：《湖北农业科学》2011年第20期4163-4165,共3页Hubei Agricultural Sciences

基　　金：中央高校基本科研业务费专项资金资助项目(2009JC009);国家大学生创新性实验计划项目

摘　　要：研究了磺胺二甲嘧啶(Sulfamethazine,SM2)在土壤中的等温吸附和光催化降解特征,考察了催化剂TiO2用量、土壤水分含量、光照时间和初始浓度等因素对降解效果的影响。结果表明,土壤表面对SM2吸附较小,90%以上的SM2以游离形式存在于土壤中;催化剂TiO2可明显促进SM2的光降解,增加土壤水分含量和延长光照时间,均能显著提高SM2的光降解率,而SM2的初始浓度对光降解效果影响较小。The adsorption and photocatalytic degradation of sulfamethazine in the soil were investigated. The effects of catalyst TiO2 dosage, water content, irradiation time, and initial concentration were studied respectively. The results showed that only a small quantity of sulfamethazine could be adsorped by the soil and 90% of sulfamethazine was free in the soil. Catalyst TiO2 accelerated the photodegradation of sulfamethazine. The degration rate increased with the increasing of the water content of the soil and irradiation time. The initial concentration of sulfamethazine slightly influenced the Dhotodezradation.

关 键 词：磺胺二甲嘧啶 土壤 吸附 光催化降解 

分 类 号：X53[环境科学与工程—环境工程]