次氯酸钠对水中腐殖酸结构及光学特性的影响

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Abstract In this study, humic acid (HA) was selected as a model compound of dissolved organic matter and used to study the effect of NaOCl on its structural and optical characteristics, including elemental composition, chemical structure, anti-oxidative activity, optical characteristics and so on. These characteristics were characterized by high-pressure exclusion chromatography, elemental analysis, Fourier transform infrared spectroscopy, UV-vis spectrum, fluorescent spectrum and photodegradation kinetics, respectively. The results showed that HA molecular weight was decreased and centralized when the concentration ratio of HA to NaOCl increased from 0 to 20.0μmol/mg. The polarity of the HA was first increased and then decreased, resulting from the evolution of the aromatic acids, fatty acids, phenols, alcohols and other oxygen containing components. It is noteworthy that the humification characteristics of the HA was not changed by NaOCl varied in the dose range used here, although the light absorption ability, antioxidant capacity and aromaticity was decreased, and the fluorescence intensity and apparent photosensitization activity was significantly enhanced. The results of this study can extend our knowledge on the structure of dissolved organic matter altered by deep oxidation treatment, and provide basic information for assessing the environmental effects of the effluent dissolved organic matter.

Key words： humic acids dissolved organic matter structural characteristics optical characteristics oxidation

Received: 19 October 2017

X131.2

Corresponding Authors: 黎云祥,教授,yx_li@cwnu.edu.cn E-mail: yx_li@cwnu.edu.cn

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	REN Dong
	WANG Tao
	CHEN Fang
	WANG Bin
	LI Yun-xiang

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REN Dong,WANG Tao,CHEN Fang等. Effect of sodium hypochlorite on the structural and optical characteristics of humic acid in waters[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(6): 2264-2272.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2018/V38/I6/2264

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