MEV como ferramenta na determinação de sais formados em uma lagoa salina no Pantanal. Estudo de Caso

Mario Rubens Gomes Santos, Joel Barbujiani Sígolo

Abstract


The present work is based on the study of saline lagoon salts formed in a salt lake located in the Nhecolândia, a sub-region of Pantanal. The objective was to characterize the salts collected at the edge of a saline, providing data to support the understanding the chemistry/geochemistry of the salt formation in the environment. This environment is characterized by high pH (<9) and high salinity (40,000 μS.cm-1), conditions that favor the precipitation and salt development. The salts were studied about their morphology and chemical composition. The most frequent morphologies are lamellar, fibrous habits and elongated forms. As for the chemical composition, these are salts of trona ((Na3H(CO3)2.2H2O) predominantly. The salts mainly occur as agglomerates clusters in which the crystals are clumped together and are formed on and around the quartz grains, using their structure as a nucleation zone.


Keywords


SEM/ Xray-EDS; Lakes; Salts; Pantanal.



DOI: http://dx.doi.org/10.21715/GB2358-2812.2019331121

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