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Contemporary Problems of Ecology

2004 year, number 1

Dynamics of Uranium Accumulation in Bottom Sediments of Lake Hollows of the Kulunda Plain

A. E. BOGUSLAVSKY

Abstract

The data on the content of natural radioactive elements (U, Ra, Th, and K40), as well as technogenic Cs137 in soils, subsoil substrata and bottom sediments of the regions of closed lake hollows are presented. It is shown that under the conditions of internal-drainage regions uranium is accumulated at a number of geochemical barriers: evaporative, sorption, gley and hydrogen sulphide. The intensity of uranium migration depends on the chemical composition of superficial water.