E3S Web of Conferences
Volume 1, 2013Proceedings of the 16th International Conference on Heavy Metals in the Environment
|Number of page(s)||3|
|Section||Heavy Metals in Sediments II: Hg in Sediments|
|Published online||23 April 2013|
Mercury fractionation in sediments downstream of the abandoned mine site of La Soterraña (Asturias, Spain)
1 Dpto. de Explotación y Prospección de Minas. Universidad de Oviedo. ETS Ingenieros de Minas. Independencia, 13. E-33004. Oviedo. Spain
2 Unidad de Espectroscopía, División de Química, Dpto. de Tecnología, CIEMAT. Avda Complutense, 40. E-28040 - Madrid. Spain
Asturias (Northern Spain) has been an important mercury mining area during the twentieth century. The mining and smelting of ore has been the responsible for the large release of mercury to the aquatic and terrestrial environments in the area. The present work sought to evaluate the fractionation of mercury in stream sediments from the Caudal River basin in central Asturias by using sequential extraction. A novel five-step sequential extraction procedure was used to assess Hg partitioning. Total mercury concentrations varied between 12 and 443 mg.Kg−1. Sequential extractions revealed that both Elemental Hg and bound to sulfide Hg constituted the major forms of mercury in the samples.
Key words: sediment / mercury mine / sequential extraction / mercury fractionation
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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