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Pike, S. M., woods hole oceanographic institution, woods hole, USA, spike@whoi.edu
Buesseler, K. O., woods hole oceanographic institution, woods hole, USA, kbuesseler@whoi.edu
Breier, C. ., woods hole oceanographic institution, woods hole, USA, cbreier@whoi.edu
Duliaova, H. ., university of hawaii, honolulu, USA, hdulaiov@hawaii.edu

QUANTIFICATION OF CESIUM IN SEAWATER OFF JAPAN USING EXTRACTION WITH PAN-AMP RESIN AND QUANTIFICATION VIA GAMMA SPECTROSCOPY

The March 2011 earthquake off the Japanese coast and subsequent tsunami that devastated the Fukushima Dai-ichi nuclear power plant resulted in the largest accidental release of Cesium 137 and 134 to the oceans. Seawater samples were collected in June 2011 from 15 to 600 kilometers off the coast of Japan as part of initial mapping of the spread of contamination in the ocean. Cesium was extracted from unfiltered and filtered (<1.0 ┬Ám) seawater using an exchange resin based upon an organic polymer (polyacrylonitrile, PAN) containing ammonium molybdophosate (AMP) (F. Sebesta and V. Stefula, 1990). The PAN-AMP resin can be counted directly using gamma spectroscopy for 134Cs and 137Cs. Stable 133Cs was added to evaluate extraction efficiency and quantified by ICPMS. Our 5 ml AMP-PAN resin column was on average 95% efficient in the removal of Cesium from 20 Liter samples at an average flow rate of 35 ml/min. Measured activities of 134Cs and 137Cs ranged from a few Bq/m3 to >1000 Bq/m3. The extraction column can be adapted to different sample volumes and easily used in the field.

Poster presentation

Session #:088
Date: 2/21/2012
Time: 17:00 - 18:00
Location: Poster/Exhibit Hall

Presentation is given by student: No

PosterID: B1012