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PARAFAC和FRI解析ISI中DOM分布 预览

The distribution of DOM in aeration pretreatment improved soil infiltration system based on FRI and PARAFAC
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摘要 利用平行因子分析(PARAFAC)和荧光区域积分(FRI)的方法解析三维荧光光谱(3D-EEMs),结合主成分分析、相关性分析、聚类分析和多元线性回归分析,研究了曝气预处理改良土壤渗滤系统(ISI)处理生活污水时溶解性有机物(DOM)的垂直分布特征.根据FRI分析,ISI中DOM可以分为5个荧光区域,包括3个类蛋白物质区域(Ⅰ、Ⅱ、Ⅳ)和2个类腐殖质物质区域(Ⅲ、Ⅴ).沿着垂直方向向下,ISI中DOM有溶出的现象,导致总荧光区域积分体积(TOT)与TN、TP、NH4^+-N、COD、TOC等都呈现显著负相关的关系,而与EC呈现显著正相关关系,其中荧光区域Ⅴ与NO3^--N浓度呈显著正相关的关系,氮素去除与DOM组成之间关系密切.通过进一步做PARAFAC分析表明,可以从DOM中识别出四种荧光组分,分别为C1类富里酸类物质和C2、C3、C4类蛋白类物质.荧光组分浓度得分值Fmax表明,ISI对物质降解由易到难依次为C2>C4>C1、C3,即类酪氨酸最易降解,其次为类色氨酸类物质和类富里酸类物质.根据多元线性回归分析,可以用Fmax间接表征TN、TP和COD等水质指标的浓度. It was studied direct distribution characteristics of dissolved organic matter(DOM) in the treatment of domestic sewage by aeration pretreatment of improved soil infiltration system using three-dimensional fluorescence spectroscopy(3 D-EEMs) based on parallel factor analysis(PARAFAC) and fluorescence regional integration(FRI), combined with principal component analysis,correlation analysis, cluster analysis and multivariate linear regression analysis. According to FRI, DOM in soil infiltration system could be divided into five fluorescent regions, including three protein-like regions(Ⅰ、Ⅱ、Ⅳ) and two humus-like regions(Ⅲ、Ⅴ).Along the vertical direction downward, DOM dissolution in soil infiltration system leaded to a significant negative correlation between TOT and TN, TP, NH4^+-N, COD, TOC and a significant positive correlation with EC, in which fluorescence region Ⅴ had a significant positive correlation with NO3^--N concentration and nitrogen removal. It was closely related to the composition of DOM.Four fluorescent components could be extracted from DOM species by PARAFAC, namely C1 type fulvic acid and C2, C3, C4 type protein. Fmax showed that the degradation order of soil infiltration system was C2 > C4 > C1, C3. It meant that tyrosine was the most easily degraded, followed by tryptophan-like substances and fulvic acid-like substances. Results from our multivariate linear regression analysis suggested that the concentration of water quality indicators such as TN, TP and COD could be indirectly expressed by Fmax.
作者 吕晶晶 龚为进 窦艳艳 段学军 刘海芳 张列宇 席北斗 于水利 侯立安 Lü Jing-jing;GONG Wei-jin;DOU Yan-yan;DUAN Xue-jun;LIU Hai-fang;ZHANG Lie-yu;XI Bei-dou;YU Shui-li;HOU Li-an(Zhongyuan University of Technology,Zhengzhou 450007,China;College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China;Chinese Research Academy of Environmental Science,Beijing 100012,China;Rocket Army Logistics Science and Technology Institute,Beijing 100190,China)
出处 《中国环境科学》 EI CAS CSCD 北大核心 2019年第5期2039-2047,共9页 China Environmental Science
基金 国家自然科学基金资助项目(U1404523) 河南省高等学校重点科研项目(16A560026) 中国纺织工业联合会科技指导性项目(2016039) 河南省高等学校供热空调重点学科开放实验室项目(2017HAC108).
关键词 溶解性有机物 改良土壤渗滤 三维荧光光谱 荧光区域积分 平行因子分析 dissolved organic matter (DOM) improved soil infiltration (ISI) three-dimensional excitation emission matrix fluorescence spectroscopy(3D-EEMs) fluorescence regional integration(FRI) parallel factor analysis(PARAFAC)
作者简介 责任作者:吕晶晶,zd-ljq@163.com(1985-),女,河南新乡人,讲师,博士,主要从事土壤渗滤脱氮除磷研究.发表论文10余篇.
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