10/5/9621 00334345 Title: (Item 661 from file: 103) AIX-08-340389; EDB-78-022972 Concentrations, physico-chemical states and mean residence times of /sup 210/Pb and /sup 210/Po in marine and estuarine waters Author(s): Schell, W.R. (Washington Univ., Seattle (USA). Lab. of. Radiation Ecology) Source: Geochim. Cosmochim. Acta (United Kingdom) v 41:8. Coden: GCACA Publication Date: Aug 1977 p 1019-1031 t Document Type: Journal Article Language: English Journal Announcement: EDB7711 Subfile: AIX (non-US Atomindex input). Country of Origin: United States Abstract: The concentrations and physico-chemical states of /sup 210/Pb have been measured in Bikini Atoll and Washington State coastal waters, and /sup 210/Po in Washington coastal waters. Lead-210 concentrations of 113 and 133 dpm.m/sup -3/ were found in surface water collections near Bikini Atoll and 29 to 153 dpm.m/sup -3/ in Bikini Lagoon. The concentrations of /sup 210/Pb in and near Bikini and in Washington State waters increased with depth in the upper 150 m at a rate of 0.35 to 0.45 dpm.m /sup -3/.m/sup -1/. On the North Equatorial Current waters near Bikini Atoll /sup 210/Pb was found associated predominantly with the soluble (colloidal) fraction, but in Washington coastal waters /sup 210/Pb and /sup 210/Po were found associated with the particulate (> 0.3 ..mu..m) fraction. The mean residence times of /sup 210/Pb, calculated from the atmospheric input to marine waters from precipitation and the concentrations measured in surface water, were consistent with the physico-chemical states of /sup 210/Pb found in samples collected in deep ocean and coastal waters. of the mean residence times were calculated, Approximate values for the upper 50 m, to be as follows: 58 days in the Strait of Juan de Fuca, 128 days at the S-mile (8 km) station off Cape Flattery (Washington), 163 days at the 12-mile Atoll. (19 km) station off Cape Flattery, and 2.6 yr near Bikini It appears that /sup 210/Pb and /sup 210/Po can be used to trace particle removal rates in the upper layers of marine waters.; Major Descriptors: *COASTAL WATERS -- LEAD 210; *COASTAL WATERS -- POLONIUM 210; *LEAD 210 -- RADIONUCLIDE MIGRATION; *POLONIUM 210 -- RADIONUCLIDE MIGRATION Descriptors: CHEMICAL STATE; ESTUARIES; LAYERS; LEVELS; PARTICLES; QUANTITATIVE CHEMICAL ANALYSIS; QUANTITY RATIO; RADIOECOLOGICAL CONCENTRATION; SEAS; SEAWATER; TRACER TECHNIQUES Broader Terms: ALPHA DECAY RADIOISOTOPES; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CHEMICAL ANALYSIS; DAYS LIVING RADIOISOTOPES; ECOLOGICAL CONCENTRATION; ENVIRONMENTAL TRANSPORT; EVEN-EVEN NUCLEI; HEAVY NUCLEI; HYDROGEN COMPOUNDS; ISOTOPE APPLICATIONS; ISOTOPES; LEAD ISOTOPES; MASS TRANSFER; NUCLEI; OXYGEN COMPOUNDS; POLONIUM ISOTOPES; RADIOISOTOPES; SURFACE WATERS; WATER; YEARS LIVING RADIOISOTOPES Subject Categories: 520301* -- Environment, Aquatic -- Radioactive Materials Monitoring & Transport -- Water -- (1987) INIS Subject Categories: B32* 10/5/962 00334340 Author(s): -- Water (Item 662 from file: ERA-03-010961; Nelson, V.A. 103) NTS-78-001165; INS-78-001678; Title: Radiological survey of plants, animals, and seven atolls in the Marshall Islands. 1974--1975 Corporate Source: Ecology Publication Date: Report Number(s): Washington Univ., Jan 1977 NV0-269-32 Language: Report English and soil at Christmas Island Progress report for (USA). Lab. p 78 Contract Number (DOE): EY-76-S-08-0269 Document Type: Seattle EDB-78-022967 5aqagk0bo9 of Radiation