Aiyesimi, Y. M.JIMOH, OMANANYI RAZAQ2025-04-162012-11-05http://repository.futminna.edu.ng:4000/handle/123456789/736In this paper, a Homotopy-perturbation analysis of a non–linear reactive contaminant flow equation with initial continuous point source is provided. The equation is described by advection, diffusion and adsorption. We assume that the adsorption term is modeled by Freudlich Isotherm. We provide an approximation of this equation using homotopy-perturbation transformation and solve the resulting linear equations analytically. The graphs of the concentration against the distance, reaction parameter and time are presented and analyzed to determine the effects of increase in the reaction coefficient, time and distance on the concentration. Findings from this research show that the concentration of the contaminant decreases with time and decreases faster when the value of the reaction parameter α is high.enHomotopy-perturbationcontaminantadvectiondiffusionadsorptionreactionArticle