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。
Fluorescence spectral characteristics of the dissolved organic matter（DOM） in a food industry wastewater treatment were investigated by three-dimensional fluorescence spectroscopy. The correlations between the fluorescence intensity of DOM characteristic peak and the concentration of the total nitrogen and COD,were established. The results of three dimensional fluorescence spectra show that there are five characteristic fluorescence peaks of DOM. The characteristic fluorescence peaks of DOM are high excitation wavelength（peak A）,low excitation wavelength tryptophan（peak B）,visible light wavelength fulvic acid（peak C）,UV light wavelength fulvic acid（peak D） and humic acid（peak E,peak F and peak G）. Fluorescence spectral parameters,including fluorescence index（FI）,humification index（HIX）,biological index（BIX）,indicate that DOM in food wastewater treatment has obvious biological source characteristics. The correlations,between the concentration of the total nitrogen and the fluorescence intensity of peak E,peak F and peak G,demonstrate that the correlation coefficient is 0.965 5,0.961 2 and 0.914 1,respectively. The correlations,between the concentration of the COD and the fluorescence intensity of peak A,peak B and their total fluorescence intensity,demonstrate that the correlation coefficient is 0.871 9,0.752 5 and 0.853 2,respectively. This study shows that the rapid predication of the total nitrogen and COD can realize by three-dimensional fluorescence spectroscopy to detect the fluorescence intensities of the humic acid and tryptophan in food industry wastewater treatment.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2017年第10期157-162,共6页
Environmental Science & Technology
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)
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
dissolved organic matter
three -dimensional fluorescence spectra
total nitrogen
COD
fluorescence intensity
food industry wastewater
