Tadini, Amanda M.
[1, 2, 3]
Marangoni, Bruno S.
Montes, Celia R.
Milori, Debora M. B. P.
Número total de Autores: 6
Afiliação do(s) autor(es):
 Univ Sao Paulo, Inst Chem Sao Carlos, Sao Carlos, SP - Brazil
 Embrapa Instrumentat, Sao Carlos, SP - Brazil
 Univ Toulon & Var, Lab PROTEE, EA3819, CS 60584, F-83041 Toulon 9 - France
 Univ Fed Mato Grosso do Sul, Inst Phys, POB 549, BR-79070900 Campo Grande, MS - Brazil
 Univ Sao Paulo, Ctr Energia Nucl Agr, Piracicaba, SP - Brazil
 Univ Sao Paulo, Nucleo Pesquisa Geoquim & Geofis Litosfera, Piracicaba, SP - Brazil
Número total de Afiliações: 6
Tipo de documento:
Citações Web of Science:
Soil organic matter (SOM) plays an important role in environmental sustainability, since it is involved in carbon and nutrient cycling. Consequently, it is a key factor to consider in studies concerning global climate change and agronomy. Among the main components of SOM are humic substances (HS), which are divided, according to their solubility, into humic acid (HA), fulvic acid (FA), and humin (HU) fractions. Study of the chemical properties of this organic matter is important for understanding the biogeochemical processes occurring in the soil. The aim of this work was to determine the metals iron (Fe) and aluminum (Al), using flame atomic absorption spectrometry (FAAS) and laser-induced breakdown spectroscopy (LIBS), in order to elucidate the role of organic matter in the transport of these metals in Amazonian soils. The results showed that FA was important for Al, while the HA fraction was more selective towards Fe. The translocations of these metals to deeper profiles in two different soils involved either young and less humified organic matter, or older organic matter with a low degree of humification. Therefore, these two humic fractions were involved in the process of soil podzolization, with FA having a predominant role in the transport of Al, while HA was mainly responsible for the transport of Fe. (AU)