【摘要】 城市河流影响着城市的发展与未来,对河流的水质监测已成为重要的环保工作。为了了解城市河流的水质变化情况及荧光技术在河流水体监测中的应用效果,采用三维荧光光谱技术(3DEEM),对某一城市河流进行实验分析。结果表明:实验河流水体共有3个典型荧光特征峰,即类腐殖质荧光峰A1(λex/λem=275 nm/360 nm)、类蛋白质荧光峰A2(λex/λem=230 nm/350 nm)和类蛋白质荧光峰A3(λex/λem=275 nm/310 nm);河流从上游至下游方向,水体所含蛋白质类荧光物质逐渐增加,推断沿河有少量生活污水汇入。此外,河流水质荧光峰强度与氨氮间表现为极显著线性关系,与COD及总磷无明显相关性。更多还原

【Abstract】 Urban rivers affect the development and future of the city. The water quality monitoring of rivers has become an important link in environmental protection. In order to understand the water quality changes of urban rivers and the application effect of fluorescence technology in river water monitoring,three-dimensional excitation-emission matrix spectra( 3 DEEM) technology is used to conduct experimental analysis on a certain urban river. The results show that there are three typical fluorescent characteristic peaks in the river water. The peak A1( λex/λem= 275 nm/360 nm) is UV-type humic-like,the peak A2( λex/λem=230 nm/350 nm) is tryptophan-like,and the peak A3( λex/λem= 275 nm/310 nm) is tyrosine-like. Besides,from upstream to downstream of the river,the protein-like fluorescent substances in the water body gradually increase,which is inferred that a small amount of domestic sewage flows in along the river. Furthermore,the fluorescence peak intensity of river water is significantly and linearly correlated with ammonia nitrogen,but has no significant correlation with COD and total phosphorus.更多还原