Artículos de revistas
Temporal trends of polycyclic aromatic hydrocarbons (PAHs) in a dated sediment core of a high atitude mountain lake: CHUNGARA lake- northern CHILE (18° S)
Registro en:
Journal of the Chilean Chemical Society 59
0717-9707
Autor
Pozo, Karla
Perra, Guido
Gómez, Victoria
Barra, Ricardo
Urrutia, Roberto
Resumen
Artículo de publicación ISI In this study levels, fluxes and temporal trend of PAHs are reported in a sediment core from Chungará Lake (18° S) in Northern Chile. The sediments
were obtained by Kayac corer and freeze dried. PAHs were extracted in SOXHLET system and measured by HPLC with diode array detector and fluorescence
detection. Sedimentary record chronology was determined using 210Pb isotopes and organic carbon (%) was also measured in sediments. Concentrations (ng g-1
d.w.) of PAHs were low ranging from ~1 to 50. PAHs fingerprint was dominated by 3-ring (21%) and 4-ring. Organic carbon (%) ranged from ~17 to 24 (21±3)
and no statistical significant correlation (p<0.05) was detected between OC (%) and PAHs along the sediment core. PAHs fluxes (µg m-2yr-1) fluctuated from ~0.3
(cm 1) to 35 (cm 5) in 1978. LPAHs/HPAHs ratios (0.04 to 3) indicate petrogenic and pyrolytic origin of PAHs. This results contributes with new information of
PAHs deposition at high altitudinal lake in Southern Hemisphere.