Biological effect on removal of Th-234, Po-210 and Pb-210 from surface water in Funka Bay, Japan

Details Biological effect on removal of Th-234, Po-210 and Pb-210 from surface water in Funka Bay, Japan Biological effect on removal of Th-234, Po-210 and Pb-210 from surface water in Funka Bay, Japan

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983gecoa..47.1783t&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 47, Issue 10, pp.1783-1790

Mathematics

Logic

10

Scientific paper

Vertical and temporal variations in the radioactivities of Th-234, Pb-210 and Po-210 were measured at a station in Funka Bay from April 1979 to February 1980. The inventory of Th-234 showed a minimum in early spring, when a spring bloom of phytoplankton was observed, then a steady increase to a maximum value in late summer, just before open sea water invaded the bay and a secondary phytoplankton bloom started. The inventories of Pb-210 and Po-210 also showed minima in early spring. These results suggest that the removal of these nuclides from sea water is accelerated by biological activity. The concentration of Th-234 decreased with depth, but those of Po-210 and Pb-210 were higher in the bottom water in August 1979 when the bay water was strongly stratified. This may be due to the supply of Pb-210 and Po-210 from the bottom. However, if the supply of these nuclides is expected in sediment particles, the concentrations of these nuclides in suspended matter were not sufficient to explain their increments in the bottom water. Residence times of Th, Pb and Po were estimated by applying a non-steady state model to the bay water when the water stayed in and the concentrations of these nuclides were changing. The mean residence time of Th is not significantly different from that of Pb, but is about half of that of Po, although the difference is much smaller than that obtained by applying a steady state model.

Affiliated with

Also associated with

No associations

Rating

Biological effect on removal of Th-234, Po-210 and Pb-210 from surface water in Funka Bay, Japan does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Biological effect on removal of Th-234, Po-210 and Pb-210 from surface water in Funka Bay, Japan, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Biological effect on removal of Th-234, Po-210 and Pb-210 from surface water in Funka Bay, Japan will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1193194