Linearity of Iodine Sorption and Sorption Capacities for Seven Soils
| Autor: | J. L. Hawkins, P. A. Smith, Marsha I. Sheppard |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
chemistry.chemical_classification
Environmental Engineering Soil organic matter Analytical chemistry Sorption Management Monitoring Policy and Law complex mixtures Pollution chemistry Desorption Content (measure theory) Organic matter Freundlich equation Energy source Waste Management and Disposal Water Science and Technology Waste disposal Nuclear chemistry |
| Zdroj: | Journal of Environmental Quality. 25:1261-1267 |
| ISSN: | 1537-2537 0047-2425 |
| DOI: | 10.2134/jeq1996.00472425002500060014x |
| Popis: | Iodine, a soluble and prevalent element in spent nuclear fuel and a pivotal element in the assessment of Canada`s nuclear fuel waste disposal option, sorbs to soils rich in organics and hydrous oxides. Biotic factors, such as microbes, enzymes and plant exudates, have been implicated in the retention of I to soils. Anion exchange of I{sup {minus}} or IO{sub 3}{sup {minus}} and chemical or biological oxidation to I{sub 2} followed by reactions with the soil organic matter are possible retention mechanisms. We have carried out sorption and desorption studies across a wide range of soil solution concentrations (10{sup {minus}7} to 10{sup 5} mg I/L, 10{sup {minus}12} to 1 M) for seven soils typical of upland and lowland soils of the Canadian Precambrian Shield. Soil solid-liquid partition values (K{sub d}), required for impact assessments, varied from 60 to 1800 L/kg and were significantly correlated with extractable Al oxide content, and background I and organic matter content. Freundlich isotherm fits show that sorption of I across our intentionally large concentration range is nonlinear; however, sorption of I across our intentionally large concentration range is nonlinear; however, sorption of I at environmental concentrations ( |
| Databáze: | OpenAIRE |
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