Natural radionuclides in the water of Narragansett Bay |
| |
Authors: | Peter Hans Santschi Yuan-Hui Li Joy Bell |
| |
Affiliation: | Lamont-Doherty Geological Observatory of Columbia University, Palisades, NY 10964U.S.A. |
| |
Abstract: | 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). |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|