废水DOM荧光强度与COD总氮的相关分析

发布时间：2018-01-26 19:49

本文关键词： 溶解性有机物三维荧光光谱总氮 COD 荧光参数食品工业废水　出处：《环境科学与技术》2017年10期 　论文类型：期刊论文

【摘要】：采用三维荧光光谱技术考察某食品工业废水处理中溶解性有机物(DOM)的荧光光谱特征,并分析DOM各组分转化及来源,以及建立DOM特征峰荧光强度与总氮、COD浓度的关系。三维荧光光谱分析表明,原水中主要存在5种DOM的特征荧光峰,即高激发波长和低激发波长类色氨酸(分别为峰A和峰B)、可见区和紫外区类富里酸(分别为峰C、峰D)和腐殖酸(峰E、峰F和峰G)。荧光光谱参数表明,荧光指数(FI)、腐殖化指数(HIX)、生物源指数(BIX)表明食品废水处理过程中DOM具有明显的生物源特征。建立腐殖酸(峰E、峰F和峰G)荧光强度与总氮浓度在处理过程中的相关性,其相关系数分别为0.965 5、0.961 2和0.914 1,以及建立高激发波长类色氨酸荧光强度、低激发波长类色氨酸荧光强度及其荧光强度之和与COD浓度相关关系,其相关系数分别为0.871 9和0.752 5和0.853 2。说明可以借助三维荧光光谱技术快速检测腐殖酸和类色氨酸荧光强度,来判断食品工业废水中总氮和COD处理程度,进而及时快速实现总氮和COD浓度的测定。
[Abstract]:The fluorescence spectrum characteristics of dissolved organic substance (DOM) in the treatment of food industry wastewater were investigated by three dimensional fluorescence spectroscopy. The transformation and source of each component of DOM were analyzed. The relationship between the fluorescence intensity of the characteristic peak of DOM and the concentration of DOM was established. Three-dimensional fluorescence spectrum analysis showed that there were five characteristic fluorescence peaks of DOM in the raw water. That is, high excitation wavelength and low excitation wavelength tryptophan (peak A and peak BX, respectively), visible region and ultraviolet region, such as fulvic acid (peak C, peak Drespectively) and humic acid (peak E). The fluorescence spectrum parameters of peak F and peak G ~ (2 +) indicate that the fluorescence index is FIX, and the humification index is HIX). Biogenic index (BIX) showed that DOM had obvious biogenic characteristics in the process of food wastewater treatment. The correlation between fluorescence intensity of humic acid (peak E, peak F and peak G) and total nitrogen concentration in the treatment process was established. The correlation coefficients were 0.965 5 ~ 0.961 2 and 0.914 1, respectively, and the fluorescence intensity of tryptophan with high excitation wavelength was established. The sum of fluorescence intensity and fluorescence intensity of low excitation wavelength tryptophan was correlated with the concentration of COD. The correlation coefficients were 0.871 9 and 0.752 5 and 0.853 2, respectively. The results showed that the fluorescence intensity of humic acid and tryptophan could be detected quickly by means of three-dimensional fluorescence spectroscopy. To judge the degree of treatment of total nitrogen and COD in the waste water of food industry, and to realize the determination of total nitrogen and COD in time and quickly.
【作者单位】：水污染控制与废水资源化安徽省重点实验室;安徽建筑大学环境与能源工程学院;
【基金】：安徽省高校优秀青年人才支持计划重点项目(gxyq ZD2017059) 安徽省高校优秀青年骨干人才国内外访学研修项目(gxfx2017054) 安徽省高校自然科学研究重点项目(KJ2016A817) 国家水体污染控制与治理科技重大专项(2014ZX07405-003-03)
【分类号】：X792
【正文快照】： 《环境科学与技术》编辑部:(网址)http://fjks.chinajournal.net.cn(电话)027-87643502(电子信箱)hjkxyjs@vip.126.com我国食品加工企业生产规模日益提高,但食品加工过程中产生的废水有机物含量高,其中溶解性有机物(dissolved organic matter,DOM)占主要部分,DOM是蛋白质、腐

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