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Radiocaesium fallout behaviour in volcanic soils in Iceland by M.A. Sigurgeirsson; O. Arnalds; S.E. Palsson; B.J. Howard; K. Gudnason is a Environmental Science article available to read on EtoBox.

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The retention of 137 Cs in various types of Andosols in Iceland was investigated. Soils were sampled at 29 sites with varying precipitation and environmental conditions. Samples were obtained from 0 to 5, 5 to 10, and 10 to 15 cm depths. The amount of radiocaesium present was quite variable, ranging between 300 and 4800 Bq m ÿ2 and correlated closely to total annual precipitation (r 2 = 0.71). The majority of 137 Cs, 82.7% on average, was retained in the uppermost 5 cm of the soil. The greatest penetration of 137 Cs was observed for organic Histosols (76.3% in top 5 cm). The Icelandic Vitrisols (barren, poorly developed Andosols) are coarse grained with only 2-5% clay content and contain little organic matter (!1%). Yet these soils retained 74% of 137 Cs in the top 5 cm. The results indicate that radiocaesium fallout is strongly retained by colloidal materials characteristic of Andosols, such as allophane and ferrihydrite. Most soils in Iceland are subject to severe and prolonged freezing and waterlogging; despite this, 137 Cs is retained in the upper soil horizons and vertical migration is negligible in Icelandic Andosols. However, erosion and aeolian activity can markedly influen

Who reads Radiocaesium fallout behaviour in volcanic soils in Iceland?

Author

M.A. Sigurgeirsson; O. Arnalds; S.E. Palsson; B.J. Howard; K. Gudnason

Publisher

Elsevier Science; Elsevier ; Elsevier BV; Publons (ISSN 0265-931X)

Published

2005

Language

EN

Field

Environmental Science (Physical Sciences)