1-丁酰基苯酚在液相中的光化学降解  

PHOTODEGRADATION OF 1-BUTANOYL PHENOL IN THE LIQUID PHASE

作　　者：胡继业[1] 张文吉[1] 

机构地区：[1]中国农业大学理学院,北京100094

出　　处：《环境化学》2004年第2期168-172,共5页Environmental Chemistry

摘　　要：以太阳光和紫外光为光源 ,对 1 丁酰基苯酚的两个异构体在液相中的光化学行为进行研究 .结果表明 :紫外光下 ,p ( 1 丁酰基 )苯酚、o ( 1 丁酰基 )苯酚在各种介质中的光解速率遵循一级动力学方程 ,p ( 1 丁酰基 )苯酚在各种溶剂中光解迅速 ,o ( 1 丁酰基 )苯酚在丙酮中的光解速率远大于其在甲醇、正己烷中的光解速率 .在不同pH缓冲溶液中进行紫外光照 2h ,p ( 1 丁酰基 )苯酚在pH =7的缓冲溶液中光解最快 ,o ( 1 丁酰基 )苯酚紫外光照 1 6 5h ,在pH =9的缓冲溶液中光解最快 .水中溶解物对p ( 1 丁酰基 )苯酚和o ( 1 丁酰基 )苯酚的光解均有一定的抑制作用 .太阳光下 ,p ( 1 丁酰基 )苯酚在甲醇、正己烷中能稳定存在 ,光照 40h浓度无变化 .在丙酮中光降解显著 ,1 2 9 4mg·l- 1 p ( 1 丁酰基 )苯酚的丙酮溶液光照 40h ,光解率为 46 2 % ;o ( 1 丁酰基 )苯酚的甲醇、正己烷溶液在太阳光下分别有轻微光解 ,而在丙酮中光解显著 ,1 38 8mg·l- 1 o ( 1 丁酰基 )苯酚的丙酮溶液光照 40h,光解率为 95 1 % .The photochemical behaviors of 1 butanoyl phenol by UV irradiation or sunlight in various solvents was examined.Under UV light,the photodegradation rate of p (1 butanoyl)phenol or o (1 butanoyl)phenol followed first order kinetics. p (1 butanoyl)phenol decomposed rapidly in various solvents,and o (1 butanoyl)phenol decomposed much faster in acetone than in methanol or n hexane. p (1 butanoyl)phenol decomposed most quickly in pH 7 aqueous buffered samples under 2 hours UV irradiation,while o (1 butanoyl)phenol decomposed most quickly in pH 9 aqueous buffered samples under 16 5 hours UV irradiation.The photodegradation of p (1 butanoyl)phenol and o (1 butanoyl)phenol also depended upon the dissolved impurities.The presence of dissolved impurities slowed the rate of the photodegradation.Under sunlight, p (1 butanoyl)phenol decomposed very slowly in n hexane or methanol,and relatively faster in acetone:46 3% of 129 4 mg·l -1 p (1 butanoyl)phenol was decomposed by 40 hours irradiation; o (1 butanoyl)phenol decomposed slightly in n hexane or methanol,and 95 1% of 138 8mg·l -1 o (1 butanoyl)phenol in acetone was decomposed by 40 hours irradiation in sun light.

关 键 词：1-丁酰基苯酚 光化学降解 紫外光 异构体 光化学行为 光解速率 农药 残留物 

分 类 号：X592[环境科学与工程—环境工程]