Radiocarbon of dissolved humic substances in river waters from the Chernobyl area

Title: Radiocarbon of dissolved humic substances in river waters from the Chernobyl area

Author: Nagao, S.; Aramaki, T.; Fujitake, N.; Matsunaga, T.; Tkachenko, Y.

Reference: Nuclear Instruments & Methods in Physics Research, Section B (Beam Interactions with Materials and Atoms), Aug. 2004, vol.223-224, pp. 848-53

doi: 10.1016/j.nimb.2004.04.156

Keywords: Radiocarbon; Humic substances; River water; Chernobyl; Carbon isotopes; AMS

Abstract: Radiocarbon (¹⁴C) was used to study the origin and transport of aquatic humic substances in river waters at the Chernobyl area, which received a pulse input of ¹⁴C as a consequence of the nuclear accident. Water samples were collected in April 1999 from the Pripyat and Sakhan Rivers, which flow through the radioactive contaminated area (30 km exclusion zone). The Δ¹⁴C values of humic and fulvic acids ranged from −68‰ to +75‰ and were ∼400‰ lower than those of non-contaminated environments. The aquatic humic substances may be derived mainly from those of bog, peat, and podzolic soil with older ¹⁴C age, and thereby reflect a larger proportion of older groundwater humic substances. Contribution of ¹⁴C by the Chernobyl accident appears to be small because of the long residence time of organic carbon at the surface soil.

URL: http://www.sciencedirect.com/science/article/pii/S0168583X04006810

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