Correlation between Cr^(6+) and Mn^(2+) Adsorption in Rock-soil Medium with Combined Pollution

[Objective] The aim was to study the correlation between Cr6+ and Mn2+ adsorption in rock-soil medium with combined pollution. [Method] Combining single Cr6+ and Mn2+ adsorption test with combined pollution test, the adsorption laws of Cr6+ and Mn2+ were studied, and the correlation between Cr6+ and Mn2+ adsorption was analysed by using correlation analysis and regression analysis. [Result] According to the comparative analysis on adsorption tests, the adsorption time, adsorption amount and adsorption speed of Cr6+ and Mn2+ were obviously distinct in single adsorption test and combined adsorption test. Correlation analysis revealed that there was a significantly positive correlation between Cr6+ and Mn2+, and there existed addition effects between Cr6+ and Mn2+ in regression analysis, that is, the adsorption of Cr6+ by the soil tested would be enhanced by Mn2+. [Conclusion] The research could provide scientific references for environmental control and environmental management.