2 documents found, page 1 of 1
Phosphorus sequestration in Fe-rich sediments from two Brazilian tropical dam r...
FONSECA, R.; CANÁRIO, T.; MORAIS, M.; BARRIGA, F.This study investigates the important role of Fe-oxide/hydroxide-rich bottom sediments, from two Brazilian tropical reservoirs, on P sequestration from the overlying waters, which decreases the risk of eutrophication. Data on P fractionation indicates that P adsorption capacity of sediments is predominantly associated with Fe, followed by orthosphosphate adsorbed onto Al hydr(oxides) and onto different forms of...
Geochemistry of metals in the bottom sediments of tropical dam reservoirs in Sa...
FONSECA, R.; PATINHA, C.; BARRIGA, F.; MORAIS, M.In tropical climates, the high rainfall and temperature, throughout the annual cycle, allow high leaching rates of metallic elements from the basin upstream, which accumulate in the reservoirs. However, the concentration of these elements in natural waters is usually lower than expected, due to the easiness of adsorption and coprecipitation in solid phases. We have studied two tropical dam reservoirs in Brazil,...