The sorption of Hg2+from aqueous solution was studied under variant conditions. Factors considered included diameters, pH values and different electrolytes .The final equilibrium was attained within 1~2 days.The investigation indicates that the gross adsorption quantity varies mainly with the pH values. In the solution that does not have other electrolytes or contains NaNO3or K2SO4, the gross adsorption quantity reaches the peak in neutral condition. As for the chlorates, the peak appears in the weakly alkaline condition. Comparing the effects of the ions, the authors conclude that the presence of Cl-decreases the gross quantity of the adsorption conspicuously, and the high value metal cations decrease the gross more effectively than the low value cations. The regression equation indicates that the adsorption of Hg2+between the concentration of 5 and 350 mg/L fits the single site langmuir sorption. The maximum adsorption quantity is 27.6 mg/g.