腐殖酸和铁对阿特拉津光降解影响的研究  

Effects of humic acid and iron on photodegradation of atrazine

作　　者：王新颖[1] 孙霞[1] 张耀斌[1] 全燮[1] 赵雅芝[1] 

机构地区：[1]大连理工大学环境学院工业生态与环境工程教育部重点实验室,大连116024

出　　处：《环境工程学报》2012年第1期81-86,共6页Chinese Journal of Environmental Engineering

基　　金：国家"973"重点基础研究发展规划项目(2007CB407302)

摘　　要：为考察除草剂在水体中的自净性能,对模拟太阳光(λ>290 nm)下腐殖酸和铁元素对阿特拉津的光化学降解进行了研究。结果表明,单独辐照阿特拉津几乎不降解。在分别加入3、5和10 mg/L的腐殖酸时,阿特拉津的降解率分别为34.36%、40.74%和15.66%;在Fe(Ⅲ)投加量从0.01 mmol/L增加到0.2 mmol/L时,阿特拉津的降解率从24.36%增加到34.97%。而在当腐殖酸与铁共存时,阿特拉津降解率则进一步提高。紫外可见光谱和荧光光谱均表明,腐殖酸-铁络合物的形成及其光化学作用,促进了阿特拉津的降解。To understand self-purification of herbicide in natural water body,effects of humic acid（HA） and/or iron on the photodegradation of atrazine（ATZ） under a stimulated sunlight（λ290 nm） were investigated.The results showed that almost no degradation of atrazine was observed for the irradiation alone group.However,the degradation of atrazine reached 34.36%,40.74% and 15.66% with HA dosage of 3 mg/L,5 mg/L and 10 mg/L,respectively.With increasing Fe（Ⅲ） dosage from 0.01 mmol/L to 0.2 mmol/L,the degradation rate ranged from 24.36% to 34.97%.When adding HA and Fe（Ⅲ） simultaneously into the irradiation system,a greater degradation rate could be obtained.UV-Vis spectrum and fluorescence spectrum suggested that the formation of a complex of Fe（Ⅲ） and HA with photochemical activity was responsible for the enhancement of atrazine degradation.

关 键 词：腐殖酸 铁 腐殖酸-铁络合物 光降解 

分 类 号：X703[环境科学与工程—环境工程]