The properties of solitary waves have been investigated theoretically in unmagnetized dusty plasma consisting of positively and negatively charged dust with kappa distributed electrons and ions. The Korteweg-de Vries (K-dV) equation governing the dynamics of given plasma system has been derived using reductive perturbation method. The soliton solution derived for the K-dV equation is of the sech2 form. Slow and fast modes are found to exist in the present plasma system in which both compressive and rarefactive solitons exist. The effects of the dusty plasma parameters and kappa parameters on the dynamics of these solitons in both modes are discussed numerically. The results are displayed graphically for the given set of parameters. The results obtained from this investigation would be useful in understanding the properties of nonlinear solitary waves in laboratory and in space dusty plasmas.
