环境水样中苯脲类除草剂的光降解  

Photodegradation of phenylurea herbicides in environmental waters under irradiation of UV and sunlight

作　　者：周建科[1] 李向梅[1] 付艳芳[1] 

机构地区：[1]河北大学化学与环境科学学院,河北省分析科学技术重点实验室,河北保定071002

出　　处：《河北大学学报（自然科学版）》2013年第6期598-602,共5页Journal of Hebei University(Natural Science Edition)

基　　金：国家级计量基标准(化学部分)资源共享平台建设项目(2005DKA10800)

摘　　要：以微萃取瓶富集-高效液相色谱法为检测手段,考察了水中灭草隆、绿谷隆、溴谷隆和敌草隆在紫外光和太阳光照射下的光降解情况.研究了光照时间、初始浓度、光照距离等条件对4组分降解率的影响.结果表明:在254nm紫外光照射下,4组分的降解速率:溴谷隆>绿谷隆>灭草隆>敌草隆,30min内光降解率均能达到80%以上;而太阳光自然照射4组分几乎不被降解.The photodegradation of monuron,monolinuron,metobromuron and diuron in environmen- tal water was investigated by HPLC.The effect of photodegradation time,initial concentration,light source distance on photolysis efficiency was studied.The results showed that under 254nm irradiation of UV,photolysis efficiency of the four components reduced according to the order：metobromuronmonol- inuronmonurondiuron.The photolysis efficiency can reach 80%in 30minites.However,the sunlight hardly has effect on photolysis efficiency.

关 键 词：高效液相色谱 光降解 苯脲类除草剂 

分 类 号：X524[环境科学与工程—环境工程]