Abstract
As a large group of persistent organic pollutants, polycyclic aromatic hydrocarbons (PAHs) commonly coexist with chlorinated organic compounds in industrial wastewater. Preferential adsorption of PAHs from wastewater and final effluent is essential in pretreatment processes. In this study, a novel nitrogen-doped mesoporous carbon (NMC) with high surface area (2130 m2/g) and bimodal pore size distribution (∼2 and ∼9.4 nm) was synthesized via a solvent evaporation induced self-assembly process using task-specific ionic liquid (TSIL) as the nitrogen source. The selective adsorption of naphthalene (NAP) with pentachlorophenol (PCP) on NMC in aqueous solution was investigated compared with conventional ordered mesoporous carbon (OMC). Kinetic studies revealed that the NAP adsorption process achieved equilibrium within 5 min and followed a pseudo-second-order rate equation. The adsorption capacity of NMC for NAP was 3.2 mmol/g, which was about 13 times that for PCP at pH 10 in a bi-solute system. The equilibriu...
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