Alkaline extraction: can it be used for the removal of 137Cs from soil?
Creators
- 1. School of Applied Physics, Kingston University, Kingston upon Thames (United Kingdom)
- 2. School of Geography, Kingston University, Kingston upon Thames (United Kingdom)
Description
A titration extraction procedure was applied to a silty clay which was spiked with 137Cs. At least 20% of spiked 137Cs silty clay was found to be associated with the humic acid (HA) fraction. This shows that HA contributes significantly to cesium fixing in soil and cesium is not only fixed between regular ion exchange complexes (REC) and specific sites in the frayed edges of clay minerals (FES). About 85% of 137Cs was found in the 12M HCl extract. The titration extraction procedure was found useful for investigation of the impact of the soil pH on the radiocesium mobility. Only trace amounts of cesium were found between pH 1 to 7, demonstrating a high immobility of cesium over this pH range. If the alkaline digestion is applied to soil for the removal of radiocesium, then these can be significantly separated from the extract by protonation of the extracted HA. (P.A.)
Files
30031576.pdf
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Additional details
Publishing Information
- Imprint Title
- Proceedings of the IRPA regional symposium on radiation protection in neighbouring countries of Central Europe
- Imprint Pagination
- 671 p.
- Journal Page Range
- p. 419-422
- Report number
- INIS-CZ--0021
Conference
- Title
- IRPA regional symposium on radiation protection in neighbouring countries of Central Europe
- Dates
- 8-12 Sep 1997
- Place
- Prague (Czech Republic)
INIS
- Country of Publication
- Czech Republic
- Country of Input or Organization
- Czech Republic
- INIS RN
- 30031576
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- CESIUM 137; EXTRACTION; HUMIC ACIDS; HYDROCHLORIC ACID; ION MOBILITY; PH VALUE; SODIUM HYDROXIDES; SOILS; TITRATION
- Descriptors DEC
- ALKALI METAL COMPOUNDS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CESIUM ISOTOPES; CHEMICAL ANALYSIS; CHLORINE COMPOUNDS; HALOGEN COMPOUNDS; HYDROGEN COMPOUNDS; HYDROXIDES; INORGANIC ACIDS; INORGANIC COMPOUNDS; INTERMEDIATE MASS NUCLEI; ISOTOPES; MOBILITY; NUCLEI; ODD-EVEN NUCLEI; ORGANIC ACIDS; ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; PARTICLE MOBILITY; QUANTITATIVE CHEMICAL ANALYSIS; RADIOISOTOPES; SEPARATION PROCESSES; SODIUM COMPOUNDS; VOLUMETRIC ANALYSIS; YEARS LIVING RADIOISOTOPES
Optional Information
- Notes
- 4 figs., 9 refs.