摘要
石化废水是我国的主要工业废水之一,水量大、污染重。废水含有大量荧光物质,它的荧光光谱可以展现有机物组成,就像指纹一样与水样一一对应,被称为水质荧光指纹,简称水纹。论文通过对我国某大型石化企业的废水的三维荧光光谱特征的研究,揭示出石化废水荧光指纹丰富的特点,它含有近10个荧光峰,其中激发波长/发射波长(eλx/λem)=230/340 nm附近荧光峰在各种石油类物质的光谱中都出现过。根据荧光峰的相关性,石化废水的荧光指纹可以分为3个比较独立的水纹区。不同区的荧光峰强度的线性相关性不显著,而同区各峰间的线性相关性显著,相关系数可以达到0.85以上。eλx/eλm=230/305 nm附近可能与苯类物质有关,而除峰λex/eλm=230/305 nm外eλx/eλm=220～320/230～440 nm区域显示出与原料(石油类物质)有密切关系。各峰的荧光强度范围和各峰荧光强度的相关性,都可以作为石化生产是否正常的判据。
Petrochemical wastewater is one of major types of industrial wastewater in China. It is of huge quantity and causes serious pollutiorL Wastewater contains lots of fluorescence matters. Its fluorescence spectrum could exhibit organic components and unique for each sample like fingerprint. Thus it is referred to as fluorescence fingerprint of water quality, in brief aqueous fingerprint. This paper presented that there were almost 10 peaks in the aqueous fingerprint of petrochemical wastewater from a large-scale petrochemical plant, including the peak at the excitation/emission wavelengths （λex/λcm） of around 230/340 nmThat peak exists in the fluorescence spectra of various petroleum materials. The aqueous fingerprint was divided into 3 zones according to the relationship of fluorescence intensity of peaks： the linear relation between the peaks from different zones was not significant while that between the peaks from same zone was significant with coefficients of above 0. 85. The zone around ）.λex/λcm= 230/ 305 nm might relate to benzene compounds and the zone around λex/λcm =220~320/230~440 nm （excluding the zone around λex/λcm =230/305 nm） showed close relation with the raw materials （petroleum materials）. The intensity of each peak had a fixed range. That range and relationships between peaks could be the evidences for diagnosing if the performance of the production processes is proper.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2011年第9期2437-2441,共5页
Spectroscopy and Spectral Analysis
基金
国家(863计划)重点项目(SQ2009AA06XK1482350)
国家水体污染控制与治理科技重大专项(2008ZX07313-007)
清华大学自主科研项目(20101081863)
国际科技合作重点项目(2007DFC90170)
高等学科创新引智计划(B07002)资助
关键词
石化废水
三维荧光光谱
水纹
Petrochemical wastewater
3-D fluorescence spectra
Aqueous fingerprint
