Fluorescence Features And Emergency Measure Of The Organic Matters In Environmental Quality Standards For Surface Water

Fluorescent spectrometry,with high selectivity and sensitivity,low time consumption,simple operation,has a wide range of applications in substance identification and concentration detection.It is difficult to carry on a deep analysis of the water quality after 3D fluorescence scanning in the lack of the standard 3D fluorescence spectra of certain organic matter.This research attempts to set up a series of standard 3D fluorescence spectra as the basis to analyze the fluorescence spectra of surface water with the key point of the fluorescent properties of the organic matters in environmental quality standards for surface water,thereby,making it possible to monitor and analyze the water quality online by 3D fluorescent spectrometry in the future.By scanning the solution of each of the organic matter in environmental quality standards for surface water using 3D fluorescence technique,we discovered that 18 of them had fluorescent features.More abundant information was obtained by further research,including value and location of fluorescence peak,minimum concentration with 3D fluorescent features and the linear relation between the concentration and fluorescence value.It can be convenient to determine the concentration of certain fluorescent matter by means of the significant correlation between the value of the fluorescence characteristic peak and the concentration.Powdered activated carbon(PAC)was found has the ability to absorb the fluorescent matters in water with high efficiency.The absorption processes of certain typical fluorescent organic matters by PAC were studied and it was found that when the contaminants concentration were above the limits in environmental quality standards for surface water,PAC(15-20mg/L)had a good removal effect on them in 60 minutes.A preliminary database of 3D fluorescent spectra of surface water was established by collecting and analyzing the 3D fluorescence features of surface water samples from different regions.Based on the evaluating system which was set by Matlab and the database talked before,water quality can be reflected more clearly by way of rating and the online monitoring of water quality would be possible.