Impact of Landfill Leachate Organics on the Behavior of Heavy Metals in Groundwater

Abstract

This paper describes the research example of the impact of organics on the behavior of heavy metals in the aquifers in the zone of the influence of the municipal solid waste landfill in the Moscow region. The aim of the study is to clarify the factors of groundwater contamination by heavy metals after recultivation in order to develop environmental protection measures. The obtained results allowed to identify the hazard of landfill as a source of contamination by heavy metals, to clarify the main stage of organic decomposition (in the top part–active stable methanogenesis and in the lower part–stable methanogenesis), and to determine the present stage of redox zoning development (the formation of the reduction zone of iron compounds contained in the solid phase water-bearing rocks, accompanied by the release of nickel and cobalt, previously adsorbed on iron and magnesium oxides and hydroxides).