东平湖可溶性有机物的荧光特征及环境意义

doi:10.11934/j.issn.1673-4831.2016.06.010

Abstract

Abstract:

The Dongping Lake holds a crucial position as the last water-staging lake of the east line of the Project of "Diverting Water from South to North" of the country and the water source of the project diverting water from west to east in Shandong Province. Its water quality is directly related to water safety of the beneficiaries of the water diversion project. The water in the lake was sampled for analysis in August 2013 and all the water quality parameters indicate that the Lake was moderately or highly eutrophied and its water on the whole was close to Grade IV in quality set in the "Standard for Quality of Surface Water Environment" of the country and failed to meet the requirement of the water diversion project. All the water quality parameters show strong extraneousness. Fluorescent features of the chromophoric dissolved organic matters in the water were analyzed with EEMS and PARAFAC, and feasibility of using fluorescent components of the organic matters as indicators of environment pollution of the lake. PARAFAC analysis detected two classes and four types of fluorescent components, that is, C1 and C3 of the class of humic-like fluorescent components at <225/305,386 nm and 260,432 nm, respectively, and C2 and C4 of the class of protein-like fluorescent components at 240,360 nm and <225/275,304 nm, respectively. Terrigenous humic-like fluorescent component C1 was significantly related to DOC and COD, which may indirectly reflect degree of the organic pollution of the water, while protein-like fluorescent component C2 was significantly and positively related to TN. Therefore, the two components, C1 and C2 can be used as indicators for rapid determination and long-term monitoring of water eutrophication in the Dongping Lake.

Key words: chromophoric dissolved organic matter, excitation-emission matrices, parallel factor analysis, Dongping Lake

CLC Number:

X524

LIU Xue-li, YAO Xin, DONG Jie, LIU Yan-long, ZHANG Ju. Fluorescence Features of Chromophoric Dissolved Organic Matter in Dongping Lake and Their Environmental Significance[J]. Journal of Ecology and Rural Environment, 2016, 32(6): 933-939.

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Fluorescence Features of Chromophoric Dissolved Organic Matter in Dongping Lake and Their Environmental Significance

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