Bibliothèque Électronique Lac Saint-Pierre

Distribution and fluxes of metals in the St. Lawrence River from the outflow of Lake Ontario to Quebec City

Lum, K.R. et Kaiser, K.L.E. et Jaskot, C. (1991). Distribution and fluxes of metals in the St. Lawrence River from the outflow of Lake Ontario to Quebec City. Aquatic Sciences , 53 (1). p. 1-19. DOI: 10.1007/BF00877072.

Ce document n'est pas hébergé sur Bibliothèque Électronique Lac Saint-Pierre.

Résumé

Six anchor stations in the St. Lawrence River from the outflow of Lake Ontario to Quebec City, were occupied for ca. 24 hours in June 1987 during low flow conditions. Samples of water and suspended particulate matter were separated by continuous-flow centrifugation, and were collected every two hours. During this sampling period, fluxes of dissolved forms of zinc, copper and nickel increased in Lac St. François and downstream relative to the sum of the fluxes for the two upstream stations at the outflow of Lake Ontario. Increases in the flux of dissolved zinc and copper were pronounced below Montreal and above Lac St. Pierre. For particulate forms of metals, all five metals show that there are significant inputs in the section of the St. Lawrence River between Lac St. François and the station just above the entrance to Lac St. Pierre. The average concentrations of dissolved cadmium, lead, zinc, copper and nickel ranged from 7–23 ng/l; 9–35 ng/l; 0.434–0.939 μg/l; 0.15–0.89 μg/l and 0.58–1.12 μg/l respectively. Regression analysis of the dissolved and particulate metal concentrations suggests that the concentration of dissolved cadmium, lead, zinc and nickel can be predicted from the regression equation and the determination of particulate metal concentration. This prediction appears to be independent of the suspended particulate matter concentration which varies from ca. 1 to 10 mg/l from the outflow of Lake Ontario to Québec City.

Type de document: Article scientifique
Statut du texte intégral: Autre
Mots-clés libres: Cadium, Lead, Zinc, Copper, Nickel, Metal concentration, St. Lawrence river, Regression analysis, Lake Ontario, Quebec city
Sujets: 8. Impacts et monitoring > 8.1. Qualité de l’eau
Date de dépôt: 15 août 2016 18:34
Dernière modification: 15 août 2016 18:34
URI: http://belsp.uqtr.ca/id/eprint/384

Actions (Identification requise)

Dernière vérification avant le dépôt Dernière vérification avant le dépôt
Coopérative de solidarité de la Réserve de la biosphère du Lac-Saint-Pierre
Concepteur de la BELSP : André Barabé, Ph. D.