Historical trends of organochlorine pesticides in a sediment core from the Gulf of Batabanó, Cuba.

Détails

ID Serval
serval:BIB_271EE9B84B73
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Historical trends of organochlorine pesticides in a sediment core from the Gulf of Batabanó, Cuba.
Périodique
Chemosphere
Auteur⸱e⸱s
Alonso-Hernández C.M., Tolosa I., Mesa-Albernas M., Díaz-Asencio M., Corcho-Alvarado J.A., Sánchez-Cabeza J.A.
ISSN
1879-1298 (Electronic)
ISSN-L
0045-6535
Statut éditorial
Publié
Date de publication
2015
Peer-reviewed
Oui
Volume
137
Pages
95-100
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Résumé
Sediments can be natural archives to reconstruct the history of pollutant inputs into coastal areas. This is important to improve management strategies and evaluate the success of pollution control measurements. In this work, the vertical distribution of organochlorine pesticides (DDTs, Lindane, HCB, Heptachlor, Aldrin and Mirex) was determined in a sediment core collected from the Gulf of Batabanó, Cuba, which was dated by using the (210)Pb dating method and validated with the (239,240)Pu fallout peak. Results showed significant changes in sediment accumulation during the last 40 years: recent mass accumulation rates (0.321 g cm(-2) yr(-1)) double those estimated before 1970 (0.15 g cm(-2) yr(-1)). This change matches closely land use change in the region (intense deforestation and regulation of the Colon River in the late 1970s). Among pesticides, only DDTs isomers, Lindane and HCB were detected, and ranged from 0.029 to 0.374 ng g(-1) dw for DDTs, from<0.006 to 0.05 ng g(-1) dw for Lindane and from<0.04 to 0.134 ng g(-1) dw for HCB. Heptachlor, Aldrin and Mirex were below the detection limits (∼0.003 ng g(-1)), indicating that these compounds had a limited application in the Coloma watershed. Pesticide contamination was evident since the 1970s. DDTs and HCB records showed that management strategies, namely the banning the use of organochlorine contaminants, led to a concentration decline. However, Lindane, which was restricted in 1990, can still be found in the watershed. According to NOAA guidelines, pesticides concentrations encountered in these sediments are low and probably not having an adverse effect on sediment dwelling organisms.
Mots-clé
Cuba, Environmental Monitoring/methods, Geologic Sediments/chemistry, Hydrocarbons, Chlorinated/analysis, Oceans and Seas, Pesticides/analysis, Rivers/chemistry, Seawater/chemistry, Water Pollutants, Chemical/analysis
Pubmed
Web of science
Création de la notice
05/10/2015 12:22
Dernière modification de la notice
20/08/2019 13:06
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