Processos hidrogeoquÃmicos em Ãguas subterrÃneas no cristalino em Caucaia/CE. ContribuiÃÃo da modelagem inversa atravÃs do PHREEQC. / Hydrogeochemical processes in groundwater in the crystalline Caucaia / CE. Contribution from inverse modeling by PHREEQC

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

26/02/2010

RESUMO

The interaction between groundwater and rocks, occurs through processes of dissolution and precipitation that attest to the hydrochemical evolution within the aquifer system with direct influence on water quality. In this study, we used the application PHREEQC to simulate these processes in water from seven wells in crystalline collected during dry and wet, with the aim of identifying the origin of the salinity of these waters. The results show that (i) the salinity varies in space and time, (ii) are mainly chlorinated water from the mixed type, (iii) the type of water remains in each well (iv) the salinity decreases during the rainy season and increases in dry period, reaching values characteristic of each well, (v) water-saturated goethite, hematite and iron hydroxide III occurred in two wells, calcite, dolomite and aragonite in three wells and two wells in hematite. In the dry and rainy season, there were dissolution of anorthite and K-feldspar, precipitation of K-mica and albite and cationic exchange types CaX2, MgX2, NaX and KX. The waters are more saline in wells that received minor differences in recharges and refills is characteristic of areas in the lens

ASSUNTO(S)

fisica da materia condensada water quality interaction between water / rock rocha cristalina crystalline rock qualidade da Ãgua interaÃÃo Ãgua/rocha

ACESSO AO ARTIGO

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