Analysis of the influence of the soil retardation coefficient on the dispersion of pollutants in landfills

The increase in the consumption of disposable products, the excessive use of packaging and the presence of goods scheduled for rapid obsolescence are factors that have directly driven the growth in the production of municipal solid waste (MSW). When these wastes are not treated properly, their negative impacts on the environment become evident, including contamination of soil and water resources. Thus, the present work presents a study of a two-dimensional model of the dispersion of pollutants in landfills, considering the governing equation in dimensionless form. The problem under study is hypothesized to be the continuous and uniform leakage of an MSW storage cell. The adopted model is solved by the Generalized Integral Laplace Transform Technique (GILTT) method, whose solution is analytical, except for the truncation error in the infinite series. The results obtained show that the proposed method is effective in reproducing the physical characteristics of the problem and when compared with other results available in the literature, highlighting the influence of the delay factor parameter in the study.