The forms, composition, and transformation of carbonates during soil formation in technogenic landscapes – infiltration fields of the sugar industry in the chemozemic region – were studied using a range of contemporary instrumental methods. The soils of infiltration fields (Calcaric Gleysols. Histic Gleysols. Eutric Cambisols) inherit the residual material of the original Chernozem containing pedogenic carbonates and are formed under the periodic influence of carbonate-containing waste from the sugar industry such as wastewater, filtration sludge (defecate), and conveyor-washing sludge. The carbonate material entering the soils from technogenic sources consists mainly of calcite, the composition and proportion of impurities in the defecate generally reflect their content in the original rock – limestone. The transformation of technical carbonates during pedogenesis results in the formation of abundant and diverse carbonate pedofeatures represented by impregnations. scattered sparite crystals. efflorescences. microsegregations. Pseudomycelium, and calcified plant residues. Carbonates in the soils of the operating untreated checks are represented not only by carbonate pedofeatures but also by calcareous interlayers of precipitated defecate and wastewater sludge. Raman spectra of carbonates indicate the presence of two crystalline polymorphic modifications of CaCO in soils – calcite and aragonite. Tendencies for the transformation of aragonite into calcite were observed after the infiltration checks were abandoned and soils continued to develop under natural hydrological and thermal regimes.
I.V. Zamotaev (Wed,) studied this question.