Combined Application of Imaging Methods for Estimating Soil Physicochemical Properties
- Autores: Aghamir F.1, Hamidi S.2, Tehranchi M.2, Mirzaiee R.3
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Afiliações:
- Soil science, Faculty of Environmental sciences, Shahid Beheshti University
- Laser & Plasma Research Institute and Department of Physics, Shahid Beheshti University
- Department of Agroecology, Environmental Sciences Research Institute, Shahid Beheshti University
- Edição: Volume 52, Nº 8 (2019)
- Páginas: 926-934
- Seção: Soil Chemistry
- URL: https://journals.rcsi.science/1064-2293/article/view/225133
- DOI: https://doi.org/10.1134/S1064229319080027
- ID: 225133
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Resumo
Traditional techniques and methods for evaluation and detection of soil samples are tedious, laborious, expensive, and time-consuming. In comparison, spectroscopic techniques have successfully overcome some of these disadvantages and can supplement or replace them. As soil is a complex media, it is difficult to assign specifically spectral features for physicochemical properties of soil. This study discusses the combined application of Attenuated Total Reflection Fourier Transform Infrared (ATR-FTIR), and Scanning Electron Microscopy coupled to EDX microprobe (SEM/EDX) methods for estimating soil physicochemical properties. For this purpose, 30 topsoil samples were measured according to standard methods of soil analysis. All spectra were collected in the mid-infrared (MIR) from 4000 to 650 cm-1. Chemometric methods were used in the analysis of multivariate data using the Quant2 package in OPUS 7 software and improved the prediction of soil properties using partial least squares regression (PLSR). The results showed that specific surface area (SSA MB-titration) had the best predictions for the soil properties in ATR-FTIR study with a RPD of 2.08, RMSE of 13.50 m2 g–1, and R2 of 0.77 (very good); followed by cation exchange capacity, organic carbon, SSA (BET), Al, clay, and Ca (good); saturation, sand, silt/clay, electrical conductivity, saturated hydraulic conductivity, K, silt, Fe, C, and Si (fair); O, Mg, pH, bulk density, porosity, total pore volume, and particle density (poor). Also, we found that SEM-EDX is able to perform a rapid simultaneous multielement analysis without any special soil sample preparation. Consequently, modern techniques, such as ATR-FTIR and SEM-EDX can be used for such studies according to the information needed and the time required for the sample preparation.
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Sobre autores
F. Aghamir
Soil science, Faculty of Environmental sciences, Shahid Beheshti University
Autor responsável pela correspondência
Email: aghamirsoil@gmail.com
Irã, Tehran, 16589-53571
S. Hamidi
Laser & Plasma Research Institute and Department of Physics, Shahid Beheshti University
Email: aghamirsoil@gmail.com
Irã, Tehran, 16589-53571
M. Tehranchi
Laser & Plasma Research Institute and Department of Physics, Shahid Beheshti University
Email: aghamirsoil@gmail.com
Irã, Tehran, 16589-53571
R. Mirzaiee
Department of Agroecology, Environmental Sciences Research Institute, Shahid Beheshti University
Email: aghamirsoil@gmail.com
Irã, Tehran, 16589-53571