基于PARAFAC分析的二级出水DOM臭氧化特性研究.PDF

中国环境科学 2015,35(2) ：427~433 China Environmental Science 基于 PARAFAC 分析的二级出水 DOM 臭氧化特性研究 * 金 鑫,金鹏康 ,孔 茜, 白 雪,王晓昌 (西安建筑科技大学环境与市政工程学院,陕西 西安 710055) 摘要：基于三维荧光平行因子分析(PARAFAC analysis),对污水处理厂二级出水溶解性有机物(DOM)在不同臭氧投加量下的反应特性进行 了研究,PARAFAC 分析确定了污水厂二级出水中共有 3 个荧光组分,其中组分 1 为蛋白质类物质,组分 2 和 3 为腐殖质类物质.当臭氧为 0.98mgO /mgTOC 时,3 个组分中的荧光基团均可以和臭氧发生比较彻底的反应.线性回归分析表明,臭氧与组分 1 和组分 2 中荧光基团的反 3 应可以很好地解释臭氧化对色度、UV254 、UV280 的去除.HPLC-SEC 的结果进一步验证了 PARAFAC 的分析结果.同时,对于蛋白类物质组 分 1 而言,臭氧主要和其中小分子物质的荧光基团发生反应,与其大分子物质几乎不发生反应. 关键词：二级出水；臭氧氧化；平行因子分析；荧光特性 中图分类号：X703 文献标识码：A 文章编号：1000-6923(2015)02-0427-07 Ozonation characteristics of DOM in secondary effluent based on fluorescence PARAFAC analysis. JIN Xin, JIN * Peng-kang , KONG Qian, BAI Xue, WANG Xiao-chang (Department of Environmental and Municipal Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China). China Environmental Science, 2015,35(2)：427~433 Abstract ：The characteristics of DOM in secondary effluent at different ozone dosages were investigated based on EEM parallel factor analysis. There were three fluorescent components in secondary effluent. Component 1was protein-like substances and the other two components were humic-like substances. The three components will react with ozone intensively at ozone dosage 0.98mgO3/mgTOC. Linear regression analysis showed that the reaction between ozone and component 1and 2could account for the removal of color, UV254and UV280 . In addition, the HPLC-SEC analysis confirmed the PARAFAC analysis results and revealed that ozone will react preferentially with small molecular weight substances in component 1. However, there was little reaction between ozone and high molecular weight substances in component 1. Key words ：secondary effluent；ozonation