Predicting potentially toxic elements in tropical soils from iron oxides, magnetic susceptibility and diffuse reflectance spectra

Author(s)

Camargo, Livia Arantes ^[1] ; Marques Jr, Jose ; Barron, Vidal ^[2] ; Ferracciu Alleoni, Luis Reynaldo ^[3] ; Pereira, Gener Tadeu ^[4] ; Teixeira, Daniel De Bortoli ^[5] ; Rabelo de Souza Bahia, Angelica Santos ^[4]

Affiliation

^[1] Sao Paulo State Univ UNESP, Fac Ciencias Agr & Vet, Res Grp CSME Soil Characterizat Specif Managemen, Campus Jaboticabal, BR-14884900 Jaboticabal, SP - Brazil

^[2] Univ Cordoba, Dept Agron, Edificio C4, Campus Rabanales, E-14071 Cordoba - Spain

^[3] Univ Sao Paulo, Luiz de Queiroz Coll Agr ESALQ, CP 09, BR-13418900 Piracicaba, SP - Brazil

^[4] Marques Jr, Jr., Jose, Sao Paulo State Univ UNESP, Fac Ciencias Agr & Vet, Res Grp CSME Soil Characterizat Specif Managemen, Campus Jaboticabal, BR-14884900 Jaboticabal, SP - Brazil

^[5] Univ Marilia, Agrarian Sci Ctr, Higyno Muzzy Filho Ave 1001, BR-17525902 Marilia, SP - Brazil

• Document type: Journal article
• Source: CATENA; v. 165, p. 503-515, JUN 2018.
• Web of Science Citations: 2

Abstract

Environmental impacts can be more accurately assessed with the aid of spatial characterization of potentially toxic elements (PTEs). In fact, developing cost-effective, environmentally friendly spatial characterization methods for PTEs can facilitate the expeditious, accurate, detailed diagnosis of soil in large areas. In this study, we used three geomorphic surfaces of Oxisols to assess the ability of chemical and X-ray diffraction analyses of iron oxides, diffuse reflectance spectroscopy (DRS) and magnetic susceptibility (MS) measurements to predict the contents in PTEs (Ba, Co, Cr, Cu, Mn, Mo, Ni, Pb and Zn) and their spatial variability. Magnetic susceptibility and diffuse reflectance spectroscopy allowed well-calibrated prediction models for Ba, Co, Cu, Mn and Ni to be developed, whereas DRS-calibrated methods afforded more accurate prediction of Ba and Mn contents, and magnetic susceptibility-calibrated methods of Co and Ni contents. The correlation between PTEs and free iron contents, and their spatial pattern, testifies to the goodness of the proposed methods for predicting the contents of potentially toxic elements in soils. (AU)

• FAPESP's process: 12/20681-0 - Mapping of specific areas of management using clay fraction iron oxides in Oxisol under cultivation of sugar cane.
• Grantee: Livia Arantes Camargo
• Support type: Scholarships in Brazil - Post-Doctorate