The indirect photodegradation mechanism of ibuprofen in simulated seawater
BAI Ying1, CUI Zheng-guo1, SU Rong-guo2, QU Ke-ming1
1. Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology(Qingdao), Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture and Rural Affairs, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China;
2. Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China
To clarify the indirect photodegradation mechanism of IBP, the indirect photodegradation behaviors of IBP were investigated in the presence of four kinds of dissolved organic matter (DOM) and were also assessed in the presence of seawater components and conditions such as salinity, pH, nitrate and bicarbonate. Firstly, the indirect photodegradation of IBP could be accelerated by the four different sources of DOM and followed pseudo-first-order kinetics, the photodegradation rate constants of APAP were found to decrease in the following order:JKHA > SRHA > SRFA > SRNOM. DOM promoted the indirect photodegradation of IBP through the formation of various reactive intermediates,·OH and 1O2 were the main contributors. Secondly, in the range of pH 5~11, the photodegradation rate of IBP was firstly decreased and then increased, the highest photodegradation rate of IBP was found at pH 5.0. Lastly, the photodegradation rate constants of IBP increased with increasing salinity, nitrate and bicarbonate.
白莹, 崔正国, 苏荣国, 曲克明. 水体中布洛芬的间接光降解作用机理研究[J]. 中国环境科学, 2019, 39(7): 2831-2837.
BAI Ying, CUI Zheng-guo, SU Rong-guo, QU Ke-ming. The indirect photodegradation mechanism of ibuprofen in simulated seawater. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(7): 2831-2837.
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