Dual roles of fulvic acid on the photodegradation of propranolol under different light-source irradiation

2018 1st International Conference on Environment Prevention and Pollution Control Technology

生态环境科学

Peng, N.^1 ; Wang, K.F.^1 ; Liao, P.P.^1 ; Huang, W.H.^1

School of Chemistry and Environment, Jiaying University, Meizhou

514015, China^1

关键词: Different lights;    Direct photolysis;    Fulvic acids;    Reactive oxygen species;    Self sensitization;    Solar irradiation;    Triplet state;    UV photolysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/199/5/052050/pdf
DOI  :  10.1088/1755-1315/199/5/052050

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The photodegradation behaviors of propranolol(PRO) in solutions containing fulvic acid were studied under different light source irradiation. PRO degraded fast by direct photolysis under UV-vis irradiation. The UV photolysis process of PRO involved the triplet state of PRO(3PRO∗) and self -sensitization decomposition. Under simulated solar irradiation, PRO photodegraded fast through 3PRO∗ decomposition mainly. Under UV-vis irradiation, the PRO photodegradation was suppressed by SRFA and PLFA. Under simulated solar irradiation, SRFA and PLFA promoted PRO photolysis and the effects increased with increasing FA concentration. Compared with SRFA, PLFA owns higher reactive oxygen species (ROS) generation ability. SRFA and PLFA could suppress the reaction of PRO and ROS and the inhibition of SRFA is more significant than that of PLFA. This study demonstrates that DOM plays dual roles in the photodegradation of PRO acting as a sensitizer and quencher under different light source irradiation.