摘要
光化学降解是海洋环境中石油去除的主要途径之一。研究在高压汞灯照射下石油烃水溶组分（WSF）的光降解。结果显示在高压汞灯下,石油WSF能够明显降解。其降解过程受溶液介质及重金属离子（Cu^2＋,Hg^2＋,Cd^2＋,Zn^2＋）的影响。在反应的初始阶段,石油WSF降解得很快,符合一级反应动力学规律。经过大约2 h后,浓度变化缓慢。在所选用的实验条件下,光降解常数的范围在0.011 8～0.023 5 min^-1之间。
Photochemical degradation is one of the major approaches to the removal of petroleum in the marine environment. The photochemical degradation of water-soluble fraction（WSF）of petroleum under the irradiation of high-pressure mercury lamp was studied in this work. The results showed that the WSF of petroleum could be effectively photo-degraded under high-pressure mercury lamp. The process of photodegradation was affected by the mediaum and heavy metal ions（Cu^2＋, Hg^2＋, Cd^2＋ and Zn^2＋ ）. The rate of photodegradation was high at the initial stage of the reaction, exhibiting a first-order reaction kinetic behavior. However, after about two hours, the concentration of WSF of crude oil showed little change. Under all experimental conditions, the rate constants of photochemical degradation ranged from 0. 011 8 to 0. 023 5 min^-1.
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2008年第4期623-626,共4页
Periodical of Ocean University of China
基金
教育部科学技术研究重点项目(105105)
教育部新世纪优秀人才支持计划(NCET-04-0643)
山东省‘泰山学者’建设工程专项经费资助
关键词
石油
光化学降解
重金属离子
petroleum
photochemical degradation
heavy metal ions
