sand

The interaction of sands as artifi cial geochemical barriers with nickel chloride solutions simulating technological effl uents is investigated. The eff ect of pre-acid treatment of sands on their ability to absorb nickel (II) ions is considered experimentally. In experiments, sands with diff erent quartz contents have been studied, in which the only impurity element was aluminum oxide in an amount from 1 to 10% (wt.).

The sorption properties of some sands selected in the coastal zones of economically important, but at the same time ecologically oppressed territories of Vietnam are considered. The purpose of the research is to assess the absorption capacity of sands in relation to emulsifi ed petroleum products, to identify their ecological role in typical situations of spillage of small amounts of toxic substances. It is shown that the sorption qualities of the sands depend on the location of the sands, their geochemical and granulometric heterogeneity.