Seasonal variability in mercury inputs into the Ria de Aveiro, Portugal View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1995-12

AUTHORS

M. E. Pereira, A. C. Duarte, G. E. Millward

ABSTRACT

Water, suspended particulate matter (SPM) and sediments were collected from the Esteiro de Estarreja (Ria de Aveiro, Portugal), which receives considerable quantities of waste mercury from a chlor-alkali plant. Dissolved and particulate Hg concentrations in the effluent ranged between 4 –167 μg I−1 and 141–3144 μg g−1, respectively, at pH values of >10. The effluent plume undergoes significant chemical changes during advection downestuary. The evidence suggested that adsorption of dissolved Hg onto organic-rich SPM was an important process. A maximum sediment Hg concentration of 500 μg g−1 was found about 1.5 km from the discharge, as a result of the settling of Hg-rich SPM. Downestuary Hg concentrations in sediments decline to about 100 μg g−1 at the mouth of the Esteiro. The particle-water interactions are discussed in terms of the transport of dissolved and particulate Hg into the Ria de Aveiro. More... »

PAGES

291-296

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf02084227

DOI

http://dx.doi.org/10.1007/bf02084227

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1009800343


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