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首页> 外文期刊>Journal of the Brazilian Chemical Society >Assessment of anthropogenic influences on copper complexation by aquatic dissolved organic matter using synchronous fluorescence
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Assessment of anthropogenic influences on copper complexation by aquatic dissolved organic matter using synchronous fluorescence

机译：利用同步荧光评估人为因素对水溶有机物对铜络合的影响

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Anthropogenic influences on the characteristics of aquatic dissolved organic matter (DOM) were evaluated in this work using synchronous fluorescence (SyF) scan spectroscopy. Samples from the Iraí and the Igua?u Rivers were collected during the summer and winter at points located upstream and downstream from a heavily urbanized area in Brazil, respectively. DOM from all samples was titrated with Cu2+ and monitored by SyF quenching. A 1:1 non linear model was used for data treatment in, at least, five distinct regions of the spectra. Results revealed that during the rainy summer, DOM from both rivers exhibited simple organic structures such as aromatic amino acids or conjugated aliphatics as the major constituents, probably arising from non-point sources. However, during the dry winter it became clear that raw sewage discharges arising from the urbanized area contributed to an increase of fluorescent organic matter that is unable to complex copper.
机译：使用同步荧光（SyF）扫描光谱法评估了人为因素对水生溶解有机物（DOM）特性的影响。夏季和冬季，分别在巴西一个城市化程度较高的地区的上游和下游采集了伊拉河和伊瓜苏河的水样。用Cu2 +滴定所有样品的DOM，并通过SyF猝灭进行监测。至少在五个不同的光谱区域中使用1：1非线性模型进行数据处理。结果表明，在多雨的夏季，两条河流的DOM都表现出简单的有机结构，例如芳香族氨基酸或共轭脂族作为主要成分，可能是由非点源引起的。然而，在干燥的冬季，很明显，城市化地区产生的原始污水排放导致无法与铜络合的荧光有机物质增加。

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