摘要
根据工业园区中TVOC和恶臭可能存在的主要气体组分,筛选传感器阵列,构建用于检测工业园区内TVOC和恶臭的电子鼻系统.本研究设计了TVOC污染指数(TPI)和恶臭污染指数(OPI)及基于电子鼻的现场检测方法.在此基础上,结合嘉兴市乍浦港区内化工园区污染情况分析,选择6个检测点进行现场检测,各传感器响应值经PCA分析,提取了2个主成分即可将8个传感器分为2类:TVOC型(S1)和恶臭型(S2～S8).将现场采集的气体样品用GC/MS进行定性分析,各采样点TVOC物质积分面积百分比在10%以上的累积起来大多都占总面积的90%以上,而恶臭类物质则大多都在10%以下.结果表明:①选用合适的传感器阵列,结合PCA分析,可以初步反映工业园区内TVOC和恶臭的污染情况;②结合电子鼻测得的污染指数与GC/MS定性分析结果,可以大体得出工业园区TVOC和恶臭总体污染情况及各种污染物分布情况;③电子鼻和GIS技术综合应用到工业园区TVOC和恶臭的检测,能初步用于评估工业园区空间污染情况.
The main volatile compounds belong to TVOC or odor which may generate from industrial park,special sensors were adopted to build electronic nose for detecting those compounds.TVOC pollution index（TPI） and odor pollution index（OPI） were designed as well as detecting method based on electronic nose in the field.On this basis,considering the pollution situation of chemical industrial of Zhapu port in Jiaxing,six detecting points were selected to be tested by electronic nose on site.Each sensor responses processed by principal components analysis（PCA）,two principal components were extracted,that is,eight sensors can be divided into two groups including the types of TVOC（S1）and odor（S2-S8）.Meanwhile,the on site collected samples were qualitatively analyzed with GC/MS.At each testing point,integral area percentage of the compounds being a part of TVOC accumulated mostly over 90% and to odor,mostly was below 10%.Results show： ① Choosing appropriate sensors combining PCA can preliminarily reflect the pollution condition of TVOC and odor in industrial park;② Combining pollution indexes measured with electronic nose and results of qualitative analysis with GC/MS can generally concluded the overall pollution situation of TVOC and odor in industrial park and distribution of each pollutant;③ Application of electronic noses and GIS to detect TVOC and odor in industrial park can preliminary assess space pollution situation in industrial park.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2011年第12期3635-3640,共6页
Environmental Science
基金
嘉兴市科技项目(2010AY1079)
国际科技合作项目(2008DFA91300)
