高强UV/SO<sub>3</sub><sup>2-</sup>体系高效降解一氯乙酸

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Abstract Monochloroacetic acid (MCAA), a typical aqueous HAAs, was selected as the target pollutant to solve the problem of HAAs pollution in drinking water. MCAA decomposition efficiency and its influencing factors in the high intensity UV/sulfite system were systematically investigated. The results showed efficient MCAA decomposition in the high intensity UV/sulfite system was obtained. MCAA was completely decomposed at its initial concentration of 50μmol/L in 50s. Compared with reportedly literatures related to reductive MCAA decomposition, MCAA decomposition rate in this study was increased above 1000 folds. Increase of sulfite dosage, initial solution pH and UV intensity was found beneficial for increasing MCAA decomposition efficiency in the studied system. Results on co-exsisting constitutents revealed that NH₄⁺ can promote MCAA decomposition, whereas NO₃^-, HCO₃^- and NOM all inhibited MCAA decomposition. Amongst them, HCO₃^- showed less inhibition effect.

Key words： HAAs MCAA sulfite

Received: 29 April 2019

PACS:

X703

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	Articles by authors
	GU Yu-rong
	DONG Wen-yi
	DONG Zi-jun
	TANG Jian-jun

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GU Yu-rong,DONG Wen-yi,DONG Zi-jun等. Efficient decomposition of monochloroaceticaid in the high intensity UV/sulfite system[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(11): 4722-4729.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I11/4722

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