Journal of Food, Agriculture and Environment

Geochemical background for watershed managing obtained in eutroferric Red Latosol

Author(s):

Carlos R. Juchen ¹*, Marcio A. Vilas Boas ², Cristiano Poleto ³, Mauricio Macedo ⁴

Recieved Date: 2014-01-09, Accepted Date: 2014-04-08

Abstract:

Environmental studies of watersheds require distinguishing the concentrations of trace elements naturally present from those of anthropogenic contributions. Thus, the establishment of geochemical background values is one of the most important issues of recent environmental science and may involve significant implications in the fields of geology, toxicology and biology among other fields of knowledge. Therefore, this study uses soil samples classified as Eutroferric Red Latosols from preserved areas of forest and located in the catchment area of the city of Toledo PR-Brazil to make up its background. The determination of element concentrations was performed by atomic emission spectrometry with inductively coupled argon plasma. The method accuracy was assessed by reference material. Through the methodology employed was possible to affirm that the samples showed a significant difference (p<0.05) for concentrations of Al, Ba and Cu. The coefficients of variation remained between 10% and 45%. Due to the statistical requirements, only the concentrations obtained for the Mn element for not having normality, required a Box-Cox transformation. Contents of the elements analysed presented the following descending order of average concentration in mg kg^-1: Fe (5956), Al (2372), Na (1493), Mg (1303), Mn (916), Cu (212), Zn (82.1), Ba (62.6), Cr (54.2), Ni (30.3), Pb (17.5), Cd (6.94) and Sb (4.58). The results also showed that the background shows trace elements in concentrations typical for this type of soil, except for Cu and Cd that surpass the limits established by the Dutch guideline values for sediment. It is concluded that the background is required for studies involving anthropogenic or environmental assessments and specific for monitoring of trace elements in the watershed under study.

Keywords:

Contents for natural trace elements, heavy metals in Latosols, permanent preservation areas, legal reserves

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Journal: Journal of Food, Agriculture and Environment
Year: 2014
Volume: 12
Issue: 2
Category: Environment
Pages: 766-769

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