Heterogeneous comparative analysis of potentially toxic elements(PTEs)in different media stem from the black rock system under a high geologic background

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For the pollution of the environment by potential toxicological elements, more focus on anthropogenic pollution, and few multidisciplinary cross-cutting endogenous pollution investigation based on the geological environment, this study is based on multivariate statistical analysis, geostatistical analysis, multivariate linear analysis, and other methods to combine the pollution of the geological environment and soils and other media, and analyze the heterogeneity and homology of the potential toxicological elements from the level of their sources, spatial and temporal distribution, composition, and homology.The analysis in a typical geological background show that for the average concentrations of Se, B, Cu, V, and Ni, all showed that the contents in soil were greater than those in bedrock.The average values of K2O, CaO, MgO and TiO2 contents in the bedrock are 1.8%, 0.21%, 0.76% and 0.78%, The results of the spatial and principal component analyses indicate that the contents of B, V, and Ni are highly homologous in soil and bedrock. These elements are derived from the smelting of metals, dyeing and printing, and electroplating. In contrast, the contents of Se and Sb are primarily derived from the burning of stone coal. The results of the APCS-MLR modeling indicated that Biomass combustion sources contributed 52.44%, 12.33%, 11.62%, 8.60%, 11.45%, 11.24%, 10.48%, 55.42%, 9.87%, and 14.00% to the concentrations of Cd, Se, B, Cu, V, Ni, As, Bi, Sb, and Cr, respectively, while agricultural surface sources contributed 36.24%, 16.66%, 14.78%, 16.33%, 13.53%, 12.88%, Sb, and Cr to Cd, Se, B, Cu, V, Ni, As, Bi, Sb, and Cr concentrations were 36.24%, 16.66%, 14.78%, 16.33%, 13.53%, 12.88%, 58.77%, 20.31%, 7.70%, and 19.42%, respectively.The soil contact rate of each element was greater than that of bedrock, suggesting that it was more readily adsorbed by the soil. The number of elements with significant correlation in bedrock is greater than that in soil. Elements whose pollution sources are smelting and electroplating are more easily settled and transferred in both soil and bedrock with higher similarity. Elements whose pollution sources are agricultural activities are more effective in settling and spreading in soil. In contrast, the bedrock is affected by the stratigraphic lithology and the spatial structure of rocks, which affect the depositional enrichment of this kind of toxicological elements.