Natural radionuclides in the water of Narragansett Bay
Abstract
The concentrations of radionuclides of the U-Th series ( 238U, 234Th, 234U, 230Th, 226Ra, 210Pb, 210Po, and 232Th, 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 and 210Po 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).
- Publication:
-
Earth and Planetary Science Letters
- Pub Date:
- October 1979
- DOI:
- 10.1016/0012-821X(79)90121-3
- Bibcode:
- 1979E&PSL..45..201S