TY - JOUR
T1 - Biodiffusion of 7Be and 210Pb in intertidal estuarine sediment
AU - Osaki, Susumu
AU - Sugihara, Shinji
AU - Momoshima, Noriyuki
AU - Maeda, Yonezo
N1 - Funding Information:
This study is partially supportedb y Grant-in-Aid for ScientificR esearch (C) (No. 05680449o)f the Ministry of Education, Sciencea nd Culture of Japan.
PY - 1997
Y1 - 1997
N2 - The profiles of 7Be and 210Pb in three kinds of sediments from the intertidal zones of the Tatara-Umi estuary, Fukuoka, Japan were measured. In a silty area, they were fitted on a simple biodiffusion model with the diffusion coefficients of (1-8) x 10-7 cm2 s-1. Radioactive tracers of 22Na, 85Sr, 134Cs, 59Fe, 54Mn, 57Co and 65Zn were added to the untreated or heated cores of the undisturbed sediments to examine bioactivity on the transfer of the radionuclides In the heated cores, particulate tracers were hardly transferred. In the untreated cores, they were diffused heterogenously and showed peaks at intermediate depths, which suggested biodiffusion with conveyor-belt deposit feeders. Particulate radionuclides in estuarine sediment in the silty area are supposed to be biodiffused mainly with macroorganisms such as crabs and bivalves.
AB - The profiles of 7Be and 210Pb in three kinds of sediments from the intertidal zones of the Tatara-Umi estuary, Fukuoka, Japan were measured. In a silty area, they were fitted on a simple biodiffusion model with the diffusion coefficients of (1-8) x 10-7 cm2 s-1. Radioactive tracers of 22Na, 85Sr, 134Cs, 59Fe, 54Mn, 57Co and 65Zn were added to the untreated or heated cores of the undisturbed sediments to examine bioactivity on the transfer of the radionuclides In the heated cores, particulate tracers were hardly transferred. In the untreated cores, they were diffused heterogenously and showed peaks at intermediate depths, which suggested biodiffusion with conveyor-belt deposit feeders. Particulate radionuclides in estuarine sediment in the silty area are supposed to be biodiffused mainly with macroorganisms such as crabs and bivalves.
UR - http://www.scopus.com/inward/record.url?scp=0030873511&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0030873511&partnerID=8YFLogxK
U2 - 10.1016/S0265-931X(96)00079-3
DO - 10.1016/S0265-931X(96)00079-3
M3 - Article
AN - SCOPUS:0030873511
SN - 0265-931X
VL - 37
SP - 55
EP - 71
JO - Journal of Environmental Radioactivity
JF - Journal of Environmental Radioactivity
IS - 1
ER -