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https://hdl.handle.net/10316/25574
Title: | Kinetics of the PO4-P adsorption onto soils and sediments from the Mondego estuary (Portugal) | Authors: | Otero, M. Coelho, J. P. Rodrigues, E. T. Pardal, M. A. Santos, E. B. H. Esteves, V. I. Lillebo, A. I. |
Keywords: | Eutrophication; Estuarine management; Phosphorus; Sorption; Kinetics; Modelling | Issue Date: | 2013 | Publisher: | Elsevier Ltd. | Serial title, monograph or event: | Marine Pollution Bulletin | Volume: | 77 | Issue: | 1-2 | Abstract: | In order to assess the status of a North Atlantic Ocean Ecoregion (Mondego system, Portugal) after the implementation of a management programme, a study on PO4-P sorption was carried out. Considering that sorption velocity markedly determines the systems promptness to phosphorus external loading, the kinetics of the sorption of PO4-P onto estuarine sediments and the upstream agricultural soils was studied. The pseudo-second order kinetic equation gave an appropriate description of PO4-P sorption onto these soils and sediments, allowing for a quantitative comparison. For soils, the kinetic constants (k 2, lg 1 g h 1) ranged between 0.007 and 0.017 lg 1 g h 1 while, in the case of sediments these ranged between 0.008 and 0.012 lg 1 g h 1. Results showed that the reduction of water residence time after the management action was relevant for the system status, affecting its reaction capacity to phosphorus loading. | URI: | https://hdl.handle.net/10316/25574 | DOI: | 10.1016/j.marpolbul.2013.08.039 | Rights: | openAccess |
Appears in Collections: | FCTUC Ciências da Vida - Artigos em Revistas Internacionais |
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