naa a22 4500 510752438 CHVBK 20180411083109.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1007/s11270-012-1430-z doi (NATIONALLICENCE)springer-10.1007/s11270-012-1430-z Methods for Extracting Heavy Metals in Soils from the Southwestern Amazon, Brazil [Elektronische Daten] [Sabrina dos Santos, Luís Alleoni] Heavy metals occur naturally in soil, at concentrations that depend on the parent material from which the soil was formed, the processes of formation, and the composition and the proportion of the components of its solid phase. Quantifying these concentrations is important for environmental studies of soil contamination and pollution, and choosing the methods for doing so is a key step in establishing heavy metal contents in soil samples. We evaluated two digestion methods (aqua regia and EPA 3051, both microwave oven-assisted) for assessing pseudo-total concentrations of Cd, Co, Cr, Cu, Ni, Pb and Zn in the surface layer (0-20cm) of soil samples from the Brazilian agricultural frontier in the southwestern Amazon. Nineteen composite samples of the most representative soil classes for the states of Mato Grosso and Rondônia were collected under native vegetation undisturbed by human intervention. Canonical discriminant analysis and principal component analysis were used for multivariate exploration of the data. Aqua regia extracted higher amounts of Co, Ni, Pb, and Zn than EPA 3051, while levels of Cr and Cu did not differ between methods. In general, aqua regia recovered more of the metals when compared to reference soil samples. Springer Science+Business Media Dordrecht, 2013 Aqua regia nationallicence EPA 3051 nationallicence Background concentrations nationallicence Soil contamination nationallicence Acid extractors nationallicence dos Santos Sabrina Graduate Student in Soil Science and Plant Nutrition, University of Sao Paulo (ESALQ/USP), Av. Pádua Dias, 11, C.P. 9, 13418-900, Piracicaba, São Paulo, Brazil aut Alleoni Luís Department of Soil Science, ESALQ/USP, Av. Pádua Dias, 11, C.P. 9, 13418-900, Piracicaba, São Paulo, Brazil aut Water, Air, & Soil Pollution Springer Netherlands 224/2(2013-02-01), 1-16 0049-6979 224:2<1 2013 224 11270 https://doi.org/10.1007/s11270-012-1430-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-012-1430-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- dos Santos Sabrina Graduate Student in Soil Science and Plant Nutrition, University of Sao Paulo (ESALQ/USP), Av. Pádua Dias, 11, C.P. 9, 13418-900, Piracicaba, São Paulo, Brazil aut NATIONALLICENCE 700 1- Alleoni Luís Department of Soil Science, ESALQ/USP, Av. Pádua Dias, 11, C.P. 9, 13418-900, Piracicaba, São Paulo, Brazil aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/2(2013-02-01), 1-16 0049-6979 224:2<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer