Liquid paraffin is an important chemical raw material,but its aromatic hydrocarbon impurities greatly affect the quality of downstream products.Using sodium lignosulfonate as the matrix and ZnCl2 as the activator,a sulfhydryl modified porous carbon material(PSC)was prepared by post grafting followed by carbonation in a tube furnace under high temperature and nitrogen protection,and its adsorption for typical aromatic impurities was investigated.The results revealed the processing conditions(microwave treatment,ultrasonication,and blue light irradiation)had significant effect on its adsorption of naphthalene in liquid paraffin,of which the specific surface area varied from 1177.57 m2‧g-1 to 1775.42 m2‧g-1 and the maximum adsorption reached 702.28 mg‧g-1.It was also found that with or without sulfhydryl groups,the difference in specific surface area and pore volume between the PSCs(PSC-SH vs PSC)was not significant,but the adsorption capacity of PSC-SH for naphthalene was 2.07 times as much as that of PSC,suggesting that introduction of sulfhydryl groups greatly increased the active sites of the sample for the adsorption of naphthalene.
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