The transformation of modified polychlorinated biphenyls by the Rhodococcus wratislaviensis strain КТ112-7 in the saline conditions

The strain Rhodococcus wratislaviensis KT112-7 was able to decompose a mixture of compounds formed after the chemical modification of a commercial mixture of polychlorinated biphenyls «Sovol», under conditions of salinity. The mixture consists of tetra- and pentachlorinated biphenyls, hydroxy-polychlorinated biphenyls, aminoethoxy-polychlorinated biphenyls, and hydroxyaminoethoxy-polychlorinated biphenyls. It was found that the destruction of this mixture by the strain of R. wratislaviensis KT112-7 in the presence of 60 g/l sodium chloride was 73.8%. Under conditions of salinization, the strain KT112-7 exhibits degradative activity to all the modified and unmodified congeners of polychlorinated biphenyls present in the mixture. The decomposition of these compounds occurred with the formation and accumulation the chlorinated and hydroxylated benzoic acids, and catechol.