Organochlorine compounds in soils and sediments of the mountain Andean Lakes
2005
Borghini, Francesca | Grimalt, Joan O. | Sánchez-Hernández, Juan C. | Barra, Ricardo | Torres García, Carlos J. | Focardi, Silvano
14 pages, 6 figures.-- PMID: 15840533 [PubMed].-- Printed version published Jul 2005.
显示更多 [+] 显示较少 [-]Semi-volatile organochlorine compounds (OC) were analyzed in remote Andean soils and lake sediments. The sampling sites covered a wide latitudinal gradient from 18°S to 46°S along Chile and an altitudinal gradient (10–4500 m). The concentrations were in the order of background levels, involving absence of major pollution sources in the high mountain areas. Significant correlations were found between log-transformed concentrations of hexachlorobenzene, α- and γ-hexachlorocyclohexane in soils and total organic content (TOC). In addition, TOC-normalized concentrations of the most volatile OC showed a significant linear dependence with air temperature. This good agreement points to temperature as a significant factor for the retention of long range transported OC in remote ecosystems such as the Andean mountains, although other variables should not be totally excluded. The highest concentrations of OCs were achieved in the sites located at highest altitude and lowest temperature of the dataset.
显示更多 [+] 显示较少 [-]Distribution of persistent organochlorine compounds in the Andean Mountain lakes is influenced by temperature.
显示更多 [+] 显示较少 [-]This work was supported by FONDECYT No. 1010640 and the EU funded project GLOBAL-SOC (ENV4-CT97-0503).
显示更多 [+] 显示较少 [-]Peer reviewed
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