饮用水中消毒副产物二溴乙腈的形成机制

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Abstract

The detection method of the disinfection by-product dibromoacetonitrile (DBAN) was established by mean of liquid-liquid extraction and gas chromatograph (LLE-GC) method using aspartic acid as the precursor, and the DBAN formation mechanism and its influencing factors were also discussed. The results showed that the production of DBAN was little when the acidity was strong and the production of DBAN rapidly increased with the increase of pH when the pH value was in the range from 6 to 7, while the production of DBAN gradually decreased at the alkaline conditions. The impact of temperature on the formation was minor at 10~30degrees conditions. Bromide ion concentration was found an important influencing factor, the production of DBAN increased with the bromide ion concentration increasing. After the total 8steps of the process, such as substitution, decarboxylation and oxidation, the aspartic acid was finally formed into DBAN.

Key words： disinfection by-products (DBPs) dibromoacetonitrile (DBAN) precursor formation mechanism influencing factor

Received: 19 April 2017

PACS:

X703.5

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	Articles by authors
	DING Chun-sheng
	CHEN Jia-du
	LI Dong-bing
	HUO Jian-qi

Cite this article:

DING Chun-sheng,CHEN Jia-du,LI Dong-bing等. Formation mechanism of the disinfection by-product dibromoacetonitrile in drinking water[J]. CHINA ENVIRONMENTAL SCIENCECE, 2017, 37(11): 4173-4178.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2017/V37/I11/4173

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