Hierarchical Porous Catalytic Pyrolysis Char Derived from Oily Sludge for Enhanced Adsorption.

ABSTRACT: A novel pyrolysis char (PC), prepared by H₃PO₄ catalytic pyrolysis of oily sludge (OS), was presented to remove methylene blue (MB) dye from aqueous solution for the first time. The optimal preparation conditions (catalytic pyrolysis temperature of 411 °C, H₃PO₄ impregnation ratio of 2.44, and catalytic pyrolysis time of 59 min) were predicted by the response surface methodology. The optimal PC exhibited favorable hierarchical porous properties, which brought a large adsorption capability (322.89 mg/g). The adsorption process fitted well with the Langmuir model and pseudo-second order model. In addition, thermodynamic parameters showed that the adsorption process was endothermic (ΔH ⁰ > 0) and spontaneous (ΔG ⁰

SUBMITTER: Han D 

PROVIDER: S-EPMC8359169 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature