Order number 940330-160606-96 -001-001 page 4 set 11 with 111 of 111 items PAGE RANGE PUB. DATE (YYMMDD) LIMITATION CODE ABSTRACT \ 233-239 ' 931000 UNL The fallout from nuclear weapons tests conducted on Bikini Atoll Island in 1954 resulted in contamination of ‘ soil with Cesium 137. To develop effective regimes for decontaminating the Bikini Atoll soil, the exchange of Cs for K, Na, understood. and other cations on the soil must be Samples of soils made homoionic with K, Na, or Ca were reacted with solutions containing Cs ions, and the quantities of Cs sorbed and the rates of exchange were measured. The samples were then reacted with solutions containing K, Na, or Ca, and the quantities of Cs desorbed and the rates of exchange were again measured. Samples made homoionic with Na had a greater ion exchange capacity than samples made homoionic with K, and, in both cases, the ion exchange capacity increased with the organic matter content of the soil. For samples pretreated with Ca, the ion exchange capacity is not related in a simple way to the organic matter content. The kinetics were assessed by plotting the rate of exchange vs. the time and vs. the quantity exchanged. A first-order equation was obeyed during most of the run in Cs desorption experiments and during a limited part of the run in Cs adsorption experiments. An increase in the rate of Cs exchange was observed at the beginning of the experiments especially for Cs adsorption. This increase is presumably due to an increase of the ionic strength of the liquid phase during the exchange process. 33 refs., 9 figs., 2 tabs. KEYWORDS CESIUM/chemical reaction kinetics ;CESIUM/ion exchange BIKINI/fallout ;BIKINI/land reclamation ; ADSORPTION; DESORPTION; CESIUM; ORGANIC MATTER; CATIONS; SOILS; NUCLEAR EXPLOSIONS; BIKINI; FALLOUT; POTASSIUM; SODIUM; CALCIUM EDB Item 5 ANALYTIC TITLE ENGLISH On-site polychlorinated biphenyl destruction demonstration project on Kwaylein Atoll, Republic of the Marshall Islands TITLE ENGLISH Air & Waste Management Association 85th annual meeting ANALYTIC AUTHOR/AFFIL PAGE RANGE PUB. DATE (YYMMDD) LIMITATION CODE ABSTRACT Machanoff, R.; Donaldson, Marietta Energy Systems, 43-44 T.L.; Brown, Oak Ridge, TN C.H. [Martin (United States) ] 920000 UNL The Hazardous Waste Remedial Actions Program (HAZWRAP), managed by Martin Marietta Energy Systems, Inc., is providing environmental management support for the installation restoration of the U.S. Army Kwajalein le 90035438 ;