Please use this identifier to cite or link to this item: https://hdl.handle.net/10316/104658
Title: Distribution and Potential Availability of As, Metals and P in Sediments from a Riverine Reservoir in a Rural Mountainous Catchment (NE Portugal)
Authors: Reis, Anabela R. 
Roboredo, Marta
Pinto, João P. R. M.
Vieira, Bernardete
Varandas, Simone G. P.
Fernandes, Luis F. S.
Pacheco, Fernando A. L.
Keywords: sediments; riverine reservoir; metals; phosphorus; chemical fractionation; potential availability
Issue Date: 24-May-2021
Publisher: MDPI AG
Project: UIDB/00073/2020 
UIDP/00073/2020 
UIDB/04033/2020 
UIDB/QUI/00616/2020 
UIDP/00616/2020 
Serial title, monograph or event: International Journal of Environmental Research and Public Health
Volume: 18
Issue: 11
Abstract: A geochemical investigation was carried out on the bottom sediments of a riverine reservoir, located in a mountainous rural region (NE Portugal), with the aim of evaluating the contents of As, metals and P and their potential availability. The elements contents were detected in the following ranges (µg g-1): As (18-64); Cr (32-128); Cu (39-93); Ni (18-80); Pb (49-160); Zn (207-334); P (1705-2681). The reducible fraction is the most significant in the retention of the elements. Based on their potential relative mobility, the detected metals could be classed as follows: Zn > As, Pb > Cu > Cr, Ni. The results on geochemical partitioning were revealed to be important when the Sediment Quality Guidelines (SQGs) were considered. Arsenic, Cr, Ni, Pb and Zn showed total contents exceeding the values of Probable Effect Level (PEL), but only As occurred in the most potentially available form; Cr and Ni can be considered relatively unavailable, since these are mainly associated with the residual phase. Locally, oxygen depletion could release P into the water column due to the higher concentrations in Fe-P and CDB-P fractions. The potential availability of As, metals and P in sediments indicates that the quality of sediments accumulated in small reservoirs should be considered in management policies.
URI: https://hdl.handle.net/10316/104658
ISSN: 1660-4601
DOI: 10.3390/ijerph18115616
Rights: openAccess
Appears in Collections:I&D CGUC - Artigos em Revistas Internacionais

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