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《Infrared》 2010-07
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Simulation of Heavy Metal Content in Soil Based on Thermal Infrared Spectrum

LI Shu-min~(1,2),LI Hong~1,SUN Dan-feng~2,ZHOU Lian-di~1,BAO Jing~2 (1.Institute of Agricultural Integrated Development,Beijing Academy of Agricultural and Forestry Sciences,Beijing 100097,China; 2.Resources and Environment College,China Agricultural University,Beijing 100094,China)  
The correlation of the content of 8 heavy metals including Cr,Ni,Cu,Zn,As,Cd,Pb and Hg in the soil in Beijing district with thermal infrared emissivity(in the waveleangth range from 8μm to 13μm) is studied by using a Model-102 Fourier transform infrared spectrometer.The spectral characteristics of those metals in soil are analyzed and a regression model for predicting heavy metal content is established.The correlation analysis result shows that the normalized ratio of emissivity is most correlated with the heavy metal content and can be used to obtain the information about the heavy metal elements in soil.Linear regression models are established for both logarithm of heavy metal content and normalized ratio emissivity and are used to verify the significance of the regression equations.The result shows that there is a relationship between the emissivity and the heavy metal content in soil. Therefore,the thermal infrared emissivity can be used to predict the heavy metal content in soil.
【Fund】: 国家科技支撑项目(2006BAB15B05);; 北京市财政局项目资助
【CateGory Index】: TP79
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