Abstract

The applicability of fluorescence spectroscopy for studying the dissolved organic matter in the Moskva River has been shown. The most typical surface water fluorophores—humic and fulvic acids and protein substances—have been revealed in the studied water samples. The fluorescence intensity depends on the sampling site and indicates the contamination rate. The dynamics of the composition and fluorescence parameters of river waters varies with respect to the sampling period. While the concentration of dissolved organic matter and chemical oxygen demand increases from October until November, specific ultraviolet absorbance, biological oxygen demand, and fluorescence of humic acids significantly decrease. The observed dynamics does not depend on the sampling site, which confirms the effect of climatic conditions. Statistically significant (p < 0.05) correlations between spectral and chemical parameters of water contamination have been revealed. Fluorescence intensity, tryptophan-containing organic substances, fulvic acids, and values of biological index correlate (r = 0.63–0.92) with the content of ammonium and phosphate ions. The fluorescent index A may be used to determine the zone of the effect of anthropogenic biological impurities on the status of waters of the Moskva River.

中文翻译：

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应用荧光光谱法研究莫斯科河水体中的溶解有机物

摘要

已经显示了荧光光谱法用于研究莫斯科河中溶解的有机物的适用性。在研究的水样中发现了最典型的地表水荧光团-腐殖酸，黄腐酸和蛋白质物质。荧光强度取决于采样点并指示污染率。河流水的组成和荧光参数的动态随采样周期而变化。从10月到11月，虽然溶解有机物的浓度和化学需氧量增加，但是特定的紫外线吸收率，生物需氧量和腐殖酸的荧光显着降低。观测到的动态不依赖于采样点，这证实了气候条件的影响。具有统计意义的（p <0.05）揭示了水污染的光谱和化学参数之间的相关性。荧光强度，含色氨酸的有机物质，富里酸和生物指数值与铵离子和磷酸根离子的含量相关（r = 0.63–0.92）。荧光指数A可用于确定人为生物杂质对莫斯科河水域状况的影响区域。