OICC Press International Journal of Mathematical Modelling & Computations 2228-6233 5 2 2015 03 21 DISPERSION OF CONTAMINANTS IN GROUNDWATER WITH CHEMICAL REACTION 185 201 EN Nirmala P. Ratchagar S. Senthamilselvi P. Meenapriya Journal Article 2015 03 21 A mathematical model presented in this paper describes the dispersion and concentration ofcontaminants (fine and coarse) in porous medium with the effect of chemical reaction. Solutetransport in porous media is discussed by means of advection-dispersion equation. The effectof particle mass parameter and reaction rate parameter on the dispersion coefficient and meanconcentration of a chemical solute is studied by introducing a slug of finite length. Analyticalsolutions are obtained by varying the dimensionless time, axial distance and length of thesolute. The results are depicted using graphs.