Deriving sediment quality guidelines in the Guadalquivir estuary associated with the Aznalcollar minig spill: A comparison of different approaches

Deriving sediment quality guidelines in the Guadalquivir estuary associated with the Aznalcollar minig spill: A comparison of different approaches

Concentrations of heavy metals (Fe, Zn, Cd, Pb, Cu and Mn) and sediment toxicity tests (mortality of amphipods, Ampelisca brevicornis, of clams, Scrobicularia plana, and of fish, Solea senegalensis) were used to derive sediment quality guidelines (SQGs). The approaches are based on the determination...

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Autores principales: Riba, I, Forja, JM, Zitko, V, DelValls, TA
Formato: Online
Lenguaje:eng
Publicado: Iniversidad Autónoma de Baja California 2003
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/159
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spelling oai:cienciasmarinas.com.mx:article-1592019-04-25T17:41:03Z Deriving sediment quality guidelines in the Guadalquivir estuary associated with the Aznalcollar minig spill: A comparison of different approaches Obtención de guías de calidad de sedimento en el estuario del Guadalquivir asociadas con el vertido minero de Aznalcóllar: Una comparación de diferentes métodos Riba, I Forja, JM Zitko, V DelValls, TA sediment quality guidelines sediment contamination sediment toxicity multivariate analysis LC50 guías de calidad de sedimento contaminación de sedimento toxicidad de sedimento análisis multivariante LC50 Concentrations of heavy metals (Fe, Zn, Cd, Pb, Cu and Mn) and sediment toxicity tests (mortality of amphipods, Ampelisca brevicornis, of clams, Scrobicularia plana, and of fish, Solea senegalensis) were used to derive sediment quality guidelines (SQGs). The approaches are based on the determination of LC50, on the application of a multivariate analysis (MAA), and on the Threshold Effect Level Quotients (TELQs). All approaches lead to consistent SQGs. The range of concentrations established with MAA results in narrower uncertainty ranges. Sediment toxicity estimated by TELQs is in good agreement with that determined experimentally. In terms of the toxic mud concentration, the maximum and minimum LC50s (for fish EC50s) are 1.07% and 0.44% for amphipods, 5.75% and 1.25% for clams, and 7.24% and 1.97% for fish, based on dry weight. However, heavy metal concentrations or ranges should be used only as a first tier in a "weight-of-evidence" approach to determine the environmental quality in aquatic systems. The use of SQGs for the management of these systems should be taken with care, especially those used for the management of dredging processes. Se han utilizado las concentraciones de los metales pesados: Fe, Zn, Cd, Pb, Cu, Mn, y los resultados de toxicidad (mortalidad de anfípodos: Ampelisca brevicornis, coquinas: Scrobicularia plana, y peces: Solea senegalensis) para obtener guías de calidad de sedimento (SQGs). Los métodos utilizados se basan en la determinación de LC50s, en la aplicación del análisis multivariante (MAA), y en la utilización de los coeficientes del nivel del umbral de efecto (TELQs). Todos los métodos permiten obtener las guías de calidad. De los resultados obtenidos en la aplicación del MAA se obtienen áreas de incertidumbre con intervalos más estrechos. La toxicidad de sedimento, estimada por el método TELQs, presenta una buena correlación con aquella determinada experimentalmente. En los términos de concentración de lodo tóxico, los valores máximos y mínimos de LC50s (para peces EC50s) son 1.07% y 0.44%, para anfípodos; 5.75% y 1.25%, para coquinas; y 7.24% y 1.97% para peces, y éstos vienen expresados como porcentaje de lodo tóxico en peso seco. Sin embargo, estos intervalos de concentraciones mencionados debieran ser utilizados en un primer paso cómo un método basado en "el peso de la evidencia" cuando se utilizaran para establecer la calidad ambiental en sistemas acuáticos. Cuando el propósito sea la utilización de estas guías de calidad de sedimento en la gestión de dragados, éstas deben utilizarse con precaución. Iniversidad Autónoma de Baja California 2003-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/159 10.7773/cm.v29i3.159 Ciencias Marinas; Vol. 29 No. 3 (2003); 261-264 Ciencias Marinas; Vol. 29 Núm. 3 (2003); 261-264 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/159/135
institution Ciencias Marinas
collection OJS
language eng
format Online
author Riba, I
Forja, JM
Zitko, V
DelValls, TA
spellingShingle Riba, I
Forja, JM
Zitko, V
DelValls, TA
Deriving sediment quality guidelines in the Guadalquivir estuary associated with the Aznalcollar minig spill: A comparison of different approaches
author_facet Riba, I
Forja, JM
Zitko, V
DelValls, TA
author_sort Riba, I
title Deriving sediment quality guidelines in the Guadalquivir estuary associated with the Aznalcollar minig spill: A comparison of different approaches
title_short Deriving sediment quality guidelines in the Guadalquivir estuary associated with the Aznalcollar minig spill: A comparison of different approaches
title_full Deriving sediment quality guidelines in the Guadalquivir estuary associated with the Aznalcollar minig spill: A comparison of different approaches
title_fullStr Deriving sediment quality guidelines in the Guadalquivir estuary associated with the Aznalcollar minig spill: A comparison of different approaches
title_full_unstemmed Deriving sediment quality guidelines in the Guadalquivir estuary associated with the Aznalcollar minig spill: A comparison of different approaches
title_sort deriving sediment quality guidelines in the guadalquivir estuary associated with the aznalcollar minig spill: a comparison of different approaches
description Concentrations of heavy metals (Fe, Zn, Cd, Pb, Cu and Mn) and sediment toxicity tests (mortality of amphipods, Ampelisca brevicornis, of clams, Scrobicularia plana, and of fish, Solea senegalensis) were used to derive sediment quality guidelines (SQGs). The approaches are based on the determination of LC50, on the application of a multivariate analysis (MAA), and on the Threshold Effect Level Quotients (TELQs). All approaches lead to consistent SQGs. The range of concentrations established with MAA results in narrower uncertainty ranges. Sediment toxicity estimated by TELQs is in good agreement with that determined experimentally. In terms of the toxic mud concentration, the maximum and minimum LC50s (for fish EC50s) are 1.07% and 0.44% for amphipods, 5.75% and 1.25% for clams, and 7.24% and 1.97% for fish, based on dry weight. However, heavy metal concentrations or ranges should be used only as a first tier in a "weight-of-evidence" approach to determine the environmental quality in aquatic systems. The use of SQGs for the management of these systems should be taken with care, especially those used for the management of dredging processes.
publisher Iniversidad Autónoma de Baja California
publishDate 2003
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/159
_version_ 1715723937471528960

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