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Maia, Angelo [VerfasserIn]; Nascimento, Rennan [VerfasserIn]; Silva, Ygor [VerfasserIn]; Nascimento, Clístenes [VerfasserIn]; Mendes, Wanderson de Sousa [VerfasserIn]; Veras, Germano [VerfasserIn]; Araújo, José [VerfasserIn]; Tiecher, Tales [VerfasserIn]; Silva, Yuri [VerfasserIn]

Near-Infrared Spectroscopy for Prediction of Potentially Toxic Elements in Soil and Sediments from a Semiarid and Coastal Humid Tropical Transitional River Basin

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  • Medientyp: E-Book
  • Titel: Near-Infrared Spectroscopy for Prediction of Potentially Toxic Elements in Soil and Sediments from a Semiarid and Coastal Humid Tropical Transitional River Basin
  • Beteiligte: Maia, Angelo [VerfasserIn]; Nascimento, Rennan [VerfasserIn]; Silva, Ygor [VerfasserIn]; Nascimento, Clístenes [VerfasserIn]; Mendes, Wanderson de Sousa [VerfasserIn]; Veras, Germano [VerfasserIn]; Araújo, José [VerfasserIn]; Tiecher, Tales [VerfasserIn]; Silva, Yuri [VerfasserIn]
  • Erschienen: [S.l.]: SSRN, [2022]
  • Umfang: 1 Online-Ressource (24 p)
  • Sprache: Englisch
  • DOI: 10.2139/ssrn.4031424
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  • Beschreibung: The input of potentially toxic elements (PTEs) in river basins is a major environmental problem. PTE concentrations are determined using traditional analytical methods, which are mostly time consuming, expensive, and reliant on hazardous reagents. An alternative method to traditional chemical analysis is near-infrared (NIR) spectroscopy, which allows for the quantification of several PTEs through chemometric models. The aim of this study is to apply NIR spectroscopy for the prediction of PTE concentrations in the Ipojuca river basin, an area exposed to potential pollutant activities. We collected 145 soil samples and 33 bed sediments samples. All samples were ground and sieved to particle sizes of ≤2-mm, ≤100-μm, and ≤38-μm. Fractions sieved at ≤38-μm were analyzed for Al, Ce, Co, Cr, Fe, La, Mn, Mo, Ni, Pr, Sc, Sm, Sn, Sr, Th, Ti, V, and Y concentrations by inductively coupled plasma optical emission spectroscopy. Spectral data were retrieved using an FT-IR/NIR spectrometer in the range of 1000 – 2500 nm with ≤2-mm and ≤100-μm fractions from all samples. The samples were subdivided into two sets: (i) soil and (ii) soil and bed sediments. Prediction models were built using the random forest algorithm (RF) and partial least squares regression (PLS) combined with different spectral preprocessing methods. Satisfactory results were obtained for Al, Ti, Sc, and V, and reasonable results for La, Mn, Pr, Sm, Sr, and Th. Our findings indicate that combining RF models with ≤100-μm samples generates better results, which can aid in the development of other environmental chemistry studies
  • Zugangsstatus: Freier Zugang