Heavy metals distributions in sediments of Odiel salt-marshes (Huelva, Spain)
Authors
C.J. Luque
Universidad de Sevilla
E.M. Castellanos
Universidad de Huelva
J.M. Castillo
Universidad de Sevilla
M. González
Universidad de Sevilla
M.C. González-Vilches
Universidad de Sevilla
M.E. Figueroa
Universidad de Sevilla
Keywords:
Metales pesados, contaminación, sedimentos, Marismas del Odiel
Abstract
Atomic absorption spectroscopy has permitted the determination of the content of heavy metals and their distribution in sediments of the Odiel Saltmarhes (SWSpain). Avery high metal concentration has been found in most of the samples investigated but their distribution is non-homogeneous and this prevents establishing a geographical pattern. Nevertheless, a certain topographic gradient can be observed: lower levels present the highest concentrations whereas areas unaccessible by tide fluctuations or those exposed to the sea present the lowest index of contamination.