水体中布洛芬的间接光降解作用机理研究

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Abstract

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.

Key words： ibuprofen indirect photodegradation dissolved organic matter reactive intermediates

Received: 30 November 2018

PACS:

X703

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	Articles by authors
	BAI Ying
	CUI Zheng-guo
	SU Rong-guo
	QU Ke-ming

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BAI Ying,CUI Zheng-guo,SU Rong-guo等. The indirect photodegradation mechanism of ibuprofen in simulated seawater[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(7): 2831-2837.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I7/2831

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