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

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