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Solvent impregnated resin was prepared by [omim][PF6] immobilizied which as liquid film to macroporous absorption resin. The mechanism of solvent impregnated resin adsorbing naphthalene in aqueous phase and the impact factors were studied. The results showed that naphthalene was distributed in the hydrophobic saturated hydrocarbons of [omim]+ in process of being extracted by [omim][PF6]; when the mass ratio of resin and [omim][PF6] were 10: 1 and 20: 1, the solubility of [omim][PF6] was less than that of 2: 1 and 5: 1; the sequence of saturated adsorbance of naphthalene with different solvent impregnated resin was q0 (10: 1)> q0 (20: 1)> q0 (rsein); the adsorption of naphthalene by resin was according with Freundlich isotherm, but by solvent impregnated resin was accord with Langmuir isotherm; the saturated adsorbance ranked in a descending order as follows: 20 degrees C, 15 degrees C, 25 degrees C; the saturated adsorbance were improving with the decline of pH and the increase of concentration of inorganic salts; the best condition was that: temperature was 30 degrees C, pH was 3, the concentration of NaCl was 2 000 mg x L (-1), and pH was the most important factor by orthogonal experiments.