In this study, the hierarchical porous materials for adsorbing mycotoxins were prepared by one-step carbonization-activation method using potassium permanganate (KMnO4) and chitin as activators and carbon source, respectively. The hierarchical porous materials had different specific surface area and pore distribution owing to different carbonization temperatures. In this paper, the effects of pH, time and temperature of adsorption as well as the concentration of patulin on the adsorption characteristics were systematically investigated. And we analyzed the adsorption properties and mechanism between hierarchical porous materials and patulin. The results showed that the adsorption process conformed to the pseudo-second-order kinetics and Langmuir model. HPC-600 (hierarchical porous chitin prepared in 600 °C) had the largest specific surface area (1047.8 m2·g-1) and the best adsorption performance with adsorption capacity above 9.2 μg/mg. The prepared hierarchical porous materials are expected to be applied to the patulin adsorption.
Keywords: Carbon materials; Chitin; Hierarchical porous materials; Mycotoxin adsorption.
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