环境工程学报2012，Vol.6Issue(8)：2465-2469,5.
水中四环素类化合物在不同光源下的光降解
Photodegradation of tetracyclines compound in aqueous solution under different light irradiation
摘要
Abstract
The aquatic photochemical behaviors of tetracyclines （TCs） were investigated under the simula- ted and natural sunlight. The results indicated that TCs were directly degraded under the simulated sunlight. Mo- reover, the TCs＇ photodegradation efficiency changed as the solution pH. The photodegradation of tetra cyeline （TC） , oxytetracycline （OTC） , chlortetracycline （CTC） , and doxycycline （DTC） increased with the increase of pH, whereas the minocycline （MTC） photodegradation exhibited different trend. In the pH range of natural water, the reaction rate constants of TCs ranged from 0. 004 -0. 026 min-L, and the half-lives of photodegrada- tion of TCs ranged from 26 - 136 min under simulated sunlight. The direct photodegradation rate of TCs is pro- portional to the sunlight intensity. Photolysis of TCs under sunlight irradiation at different season showed that the degradation is faster in summer compared with that in spring/winter. The photodegradation of tetracycline in Dongjiang River showed a fast rate. The average half-lives of TC was 8.2 min in clear weather of winter.关键词
直接光降解/四环素类化合物/模拟太阳光/太阳光/降解半衰期Key words
direct photolysis/tetracycline/simulated light/natural sunlight/half-lives of photodegrada-tion分类
资源环境引用本文复制引用
胡学香,陈勇,聂玉伦,胡春..水中四环素类化合物在不同光源下的光降解[J].环境工程学报,2012,6(8):2465-2469,5.基金项目
国家科技重大专项 （）
