Natural radionuclides in the water of Narragansett Bay

Autor: Yuan-Hui Li, Joy J. Bell, Peter H. Santschi
Rok vydání: 1979
Předmět:
Zdroj: Earth and Planetary Science Letters. 45:201-213
ISSN: 0012-821X
DOI: 10.1016/0012-821x(79)90121-3
Popis: The concentrations of radionuclides of the U-Th series (238U,234Th,234U,230Th,226Ra,210Pb,210Po, and232Th,228Ra,228Th) in the water of Narragansett Bay are reported. Analysis of the total, particulate, dissolved and colloidal forms of Th isotopes reveal a consistent removal behavior which is controlled mainly by the particulate matter concentration and the sediment resuspension rate. Half-removal times of Th from solution onto particles range from 1.5 to 15 days, and settling velocities of Th containing particles range generally between 1 and 11 m/day.210Pb and210Po concentrations are seasonally dependent, with higher concentrations and slower removal during the early summer (half-removal times from solution onto particles of 1–5 days in winter and up to 2 months in early summer).
Databáze: OpenAIRE