Impacto das diferentes frações de fósforo do sedimento de fundo na recarga interna de reservatórios rasos.

• Autor(a) principal: Rocha, Maria Aparecida Melo
• Data de Publicação: 2017
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
• Texto Completo: http://www.repositorio.ufc.br/handle/riufc/45550
• topic: Fósforo total; Frações de fósforo total; Recarga interna de reservatórios

An appropriate management of the Brazilian water resources, specially, from the state of Ceará is a growing challenge. One of the main problems is eutrophication, which is caused by the excess of nutrients in the water body, such as phosphorus and nitrogen, causing the appearance of aquatic plants that compete for oxygen and make light passage too hard. This causes mortality of the fishes and it compromises the use of the river or the reservoir. Those nutrients can come from external sources, such as detergents and pesticides, and from internal sources, such as the phosphorus release at the sediment-water interface. The aim of this work is to evaluate the potential release of total phosphorus at the different fractions of phosphorus from the sediment. It was founded that the most available fraction of total phosphorus is the Iron and Aluminum bound phosphorus, where the sediment that had the most amount of this fraction potentially released 1644,80 µg/L of total phosphorus, in anoxic conditions. Furthermore, the fraction of P that presented the least available was the residual P, where the sediment that had a high concentration of this fraction potentially release only 71,94 µg/L of TP, also in anoxic conditions. It is possible to conclude that studying the amount of TP that the different fractions of P can release to the water column is important to help the water resources management companies to predict the impact that the internal recharge of P can have on reservoirs and then create solutions to avoid that the use of those reservoirs get compromised.