A contaminated area associated with a residential unlined landfill. located in Araras. was investigated. The aim of this work was to develop a hydrogeological and geochemical conceptual model in order to identify the redox zones related to the landfill and to explain the main processes resulting from the impact of leachates on the local groundwaters and soil. https://parisnaturalfoodes.shop/product-category/spirulina-powder/