硝基酚类化合物在海水中的光化学氧化研究  

Studies on Photochemical Oxidation of Nitrophenols in Seawater

作　　者：杨桂朋[1] 戚佳琳 

机构地区：[1]青岛海洋大学化学化工学院,青岛266003 [2]山东省商品进出口检验局,青岛266002

出　　处：《高等学校化学学报》2002年第6期1180-1182,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金 (批准号 :4970 60 70 );山东省自然科学基金 (批准号 :Q97E0 414 5 )资助

摘　　要：The photochemical degradation of p nitrophenol and 2,4 dinitrophenol in both natural seawater and artificial seawater was studied under the irradiation of mixed light sources(ultraviolet lamp/high pressure mercury lamp). The photolysis of the two nitrophenols was influenced by various factors including medium, heavy metal ions and photosensitizer. The photolysis of the two nitrophenols in natural seawater was faster than in artificial seawater, presumably due to the effect of inherent photosensitizers in natural seawater. The addition of Cu 2+ , Pb 2+ or Cd 2+ into the seawater solutions obviously increased the photolysis rate of the nitrophenols. Interestingly, we found that the presence of anthroquinone could accelerate the photolysis of p nitrophenol in natural seawater but had almost no impact on the photolysis of 2,4 dinitrophenol. The half lives of the photoreactions in natural seawater under our conditions were 40-54 min for p nitrophenol and 37-69 min for 2,4 dinitrophenol, respectively. Our study suggests that photochemical degradation is an important removal pathway for the nitrophenols in seawater.The photochemical degradation of p nitrophenol and 2,4 dinitrophenol in both natural seawater and artificial seawater was studied under the irradiation of mixed light sources(ultraviolet lamp/high pressure mercury lamp). The photolysis of the two nitrophenols was influenced by various factors including medium, heavy metal ions and photosensitizer. The photolysis of the two nitrophenols in natural seawater was faster than in artificial seawater, presumably due to the effect of inherent photosensitizers in natural seawater. The addition of Cu 2+ , Pb 2+ or Cd 2+ into the seawater solutions obviously increased the photolysis rate of the nitrophenols. Interestingly, we found that the presence of anthroquinone could accelerate the photolysis of p nitrophenol in natural seawater but had almost no impact on the photolysis of 2,4 dinitrophenol. The half lives of the photoreactions in natural seawater under our conditions were 40-54 min for p nitrophenol and 37-69 min for 2,4 dinitrophenol, respectively. Our study suggests that photochemical degradation is an important removal pathway for the nitrophenols in seawater.

关 键 词：光化学氧化 对硝基苯酚 2 4-二硝基苯酚 光化学反应 海水 海洋污染 光降解 光化学反应 有机污染物 

分 类 号：X55[环境科学与工程—环境工程] O644.19[理学—物理化学]