Comparison of activated carbons from Arundo donax Linn with H₄P₂O₇ activation by conventional and microwave heating methods

Sun, Yuanyuan; Yue, Qinyan; Gao, Baoyu; Wang, Bo; Li, Qian; Huang, Lihui; Xu, Xing

Comparison of activated carbons from Arundo donax Linn with H₄P₂O₇ activation by conventional and microwave heating methods

2012

The pore structure, chemical properties and adsorption behavior of activated carbons (ACs) derived from Arundo donax Linn using H₄P₂O₇ activation by conventional (AAC) and microwave heating methods (MAAC) were compared. AAC was produced by carbonizing/activating at 600°C for 1h in a muffle furnace. MAAC was prepared with radiation power of 700W and radiation time of 15min. N₂ adsorption/desorption isotherms, Boehm titration, Fourier-transform infrared spectroscopy (FTIR) and adsorption capacity of ciprofloxacin (CIP) were used for this purpose. MAAC exhibited larger surface area (1567m²/g) and larger micropore surface area (631m²/g). Results from Boehm’s titration and Fourier-transform infrared spectra suggested that AAC was characteristic of more acidic functionalities than MAAC. It was shown that AAC presented better performance for CIP adsorption per unit surface area. The influence of the textural and surface properties of the adsorbents on the CIP adsorption was discussed.

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