Bento, Lucas R.
Constantino, Isabela C.
Tadini, Amanda M.
Melo, Camila A.
Ferreira, Odair P.
Moreira, Altair B.
Bisinoti, Marcia C.
Total Authors: 7
 Univ Estadual Paulista Julio de Mesquita Filho Un, Lab Estudos Ciencias Ambientais LECA, Inst Biociencias Letras & Ciencias Exatas, BR-15054000 Sao Jose Do Rio Preto, SP - Brazil
 Embrapa Instrumentacao, BR-13560970 Sao Carlos, SP - Brazil
 Univ Fed Ceara, Lab Mat Funcionais Avancados LaMFA, Dept Fis, BR-60440554 Fortaleza, Ceara - Brazil
Total Affiliations: 3
Journal of the Brazilian Chemical Society;
Web of Science Citations:
The chemical and spectroscopic characteristics of soil organic matter (SOM) isolated from Amazonian dark earth (ADE) and surrounding soil (SR) were evaluated according to the soil depth. The results showed opposite trends for the soils. While ADE featured SOM with a greater aromatic condensation degree and greater hydrophobicity in the top layer, the SR showed more aliphatic and polar SOM. The SOM arrangement from ADE was less hydrophobic, aromatic, and more polar in depth. In contrast, the SOM from SR showed an increase in molecular weight and hydrophobicity. Besides the aromatic protection in the SOM from ADE, there was organo-mineral protection through binding to soil minerals. This suggested that the SOM from ADE was protected by its hydrophobicity and interaction with minerals compared with that from the SR, thereby showing that the combination of both characteristics is important to create new technologies for soil carbon storage. (AU)