Zonguldak bituminous coal and Sivas Divrigi Ulucayir (SDU) lignite are chosen as adsorbent on the adsorption of nonionic Igepal CA-630. Kinetic and equilibrium studies were carried out at initial concentrations between 3-50 ppm for 24 hours. The amount of adsorbed Igepal CA-630 was increased at low shaking speed. While the increasing of temperature caused an increase in amount of adsorbed matter on SDU lignite it led to the decrease on Zonguldak bituminous coal. The adsorption capacities of coals were increased with decreasing the particle size of the coals. The effect of pH on Zonguldak bituminous coal was investigated by reducing the pH of medium from 9.10 to the 3.08 with 0.1N H2SO4. The amount of adsorbed matter on Zonguldak bituminous coal was increased with decreasing of pH. The amount of adsorbed matter on Zonguldak bituminous coal demineralized by the oil agglomeration technique was lower than that of Zonguldak bituminous coal. Adsorption data were in good agreement with Freundich isotherm and adsorption was an exothermic and spontaneous process according to the results of thermodynamic parameters.