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.).
