摘要
紫外线 (UV)能去除水中微量苯 (<10mg/L) ,其反应过程可用一级动力学方程描述 ,但其降解速度较快 ,这是该技术降解水中微量苯的一个特点。当 pH值为 7时 ,其去除速率常数k为 0 .335h- 1,半衰期为 2 .0 7h ;在 pH值为 5～ 9的范围内 ,速率常数和半衰期变化不大。此外 ,测定了苯降解过程中溶解氧 (DO)和苯酚浓度的变化 ,讨论了苯降解的机理。
The reaction process in which trace benzene (<10 mg/L) can be removed from water by UV is in conformity with the first order kinetic equation and characterized by its relative rapid velocity of trace benzene degradation in water.It was observed that at pH value of 7,the rate constant is 0.335 h -1 and the half life of removing benzene is 2.07 h,and there is little change both in rate constant and half life as pH value is in the range of 5～9.Furthermore,the variation of DO and phenol concentration was measured in the process of benzene degradation, and the mechanism of benzene degradation was discussed.
出处
《中国给水排水》
CAS
CSCD
北大核心
2001年第10期12-15,共4页
China Water & Wastewater
基金
国家自然科学基金资助项目(2 98770 0 7)
同济大学污染控制与资源化研究国家重点实验室开放基金资助项目 (990 4)
