Redistribution of soluble components during ice segregation in freezing ground

The segregation of ice develops in freezing grounds by migration of a pore solution to the crystallization front. How do the soluble components behave during the ice segregation, especially mobile forms of contaminant heavy m etals? The intent of this paper is to study redistribution of the mobile metals du ring formation of lens-type cryogenic structure freezing water-rich silt, T he experimental data show that the concentration of pore solute increases d uring the segregation of ice including metal pollutants. The zones of high concentration are formed at the interface of segregation ice lens and miner al layers in freezing ground. The parameters of phase transition of water ( start temperature of thawing and total heat of phase transition) in such zo nes are decreased with the increased concentration. Part of the liquid unfr ozen water in the concentration zones of frozen silt consists of microscopi c drops at the surface of ice crystals. Probably part of the dissolved mobi le component is present in such liquid inclusions under subzero temperature . A fixation of metal pollutants takes place in the zones of concentration during ice segregation in freezing ground. (C) 2001 Elsevier Science BN. Al l rights reserved.