期刊
DESALINATION AND WATER TREATMENT
卷 124, 期 -, 页码 287-296出版社
DESALINATION PUBL
DOI: 10.5004/dwt.2018.22725
关键词
Pomegranate peel; Activated carbon; Adsorption; Methylene blue; Phosphoric acid
资金
- AL-Muthanna University in IRAQ [100-IRMI/INT16/6/2(001/2018)]
Pomegranate (Punica Granatum) peels were utilized as precursors to prepare mesoporous activated carbon (PPAC) via H3PO4 -activation method. The surface characterization of PPAC was achieved using Fourier Transform Infrared (FTIR), Scanning Electron Microscopy (SEM), N-2 adsorption/ desorption, X-Ray Diffraction (XRD), and the point of zero charge (pH(pzc)) method. It was found that PPAC a large surface area and total pore volume corresponded to 1280.45 m(2)/g and 1.343 cm(3)/g, respectively. The adsorption properties of PPAC with methylene blue (MB) was conducted at different adsorbent dose (0.2-3 g/L), solution pH (3-11), initial dye concentrations (50 mg/L-400 mg/L), contact time (0-135 min) using batch mode operation. The kinetic uptake profiles are well described by the pseudo-second-order model, while the Langmuir model describes the adsorption behaviour at equilibrium. The maximum adsorption capacity of PPAC with methylene blue was 384.61 mg/g at 303 K. Various thermodynamic parameters such as standard enthalpy (Delta H degrees), standard entropy (Delta S degrees) and standard free energy (Delta G degrees) showed that the adsorption of MB onto PPAC was favourable and endothermic in nature.
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