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基于中紅外光譜的土壤礦物表征及其鑒
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of Soil Clay Minerals Using Mid-infrared Spectroscopy and the Application in Soil Identification
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    摘要:

    以3種標(biāo)準(zhǔn)粘土礦物伊利石、高嶺石和蒙脫石為材料，研究其中紅外光譜（包括透射光譜、衰減全反射光譜和光聲光譜）的特征。3種粘土礦物的中紅外透射光譜均存在3個(gè)主要的吸收區(qū)域（3000～3800cm-1,1300～1800cm-1和500～1200cm-1）， 且吸收特征明顯不同；3種粘土礦物的中紅外衰減全反射光譜的差異主要表現(xiàn)在800～1200cm-1，其他區(qū)域差異不明顯；而3種粘土礦物的中紅外光聲光譜特征與透射光譜相近，但3個(gè)吸收區(qū)域具有更豐富的吸收特征。應(yīng)用中紅外光聲光譜分析表明，海倫黑土為富含蒙脫石的偏中性土壤，長武黃土為富含蒙脫石或伊利石的堿性土壤，而祁陽紅壤為富含高嶺石的酸性土壤。

    Abstract:

    Characterization of three source clay minerals, illite, kaolin and montmorillonite, were made using three mid-infrared spectroscopic techniques (attenuated total reflectance (FTIR-ATR), transmittance spectroscopy, and photoacoustic spectroscopy (FTIR-PAS)). For the FTIR transmittance spectra, there are three main absorption regions: 3000～3800cm-1,1300～1800cm-1, and 500～1200cm-1, and sharp differences can be found in each region. For the FTIR-ATR spectra, there are absorptions with main difference in the region of 800～1200cm-1. For the FTIR-PAS spectra, there are also three similar absorption regions as FTIR transmittance spectra. However more information is found in the FTIR-PAS spectra comparing with FTIR transmittance absorptions. The FTIR-PAS was applied to identify three soil types and the results revealed that: Hailun soil was characterized as montmorillonite type soil with medium calcium carbonate content, Changwu soil was characterized as montmorillonite/illite type soil with high calcium carbonate content, and Qiyang soil was characterized as kaolin type soil with low calcium carbonate content

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杜昌文,周桂勤,鄧晶,周健民,王火焰,陳小琴.基于中紅外光譜的土壤礦物表征及其鑒[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2009,40(Z1):154-158. of Soil Clay Minerals Using Mid-infrared Spectroscopy and the Application in Soil Identification[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(Z1):154-158.

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