DEVELOPMENT AND CHARACTERIZATION OF MICROWAVE-ASSISTED ACTIVATED CARBONS FROM PARKINSONEA ACULEATA WOOD

G. NUNELL; M. E. FERNANDEZ; P. BONELLI; A. L. CUKIERMAN

ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY

SPRINGER

Lugar: Berlin; Año: 2016 vol. 22 p. 347 - 356

0929-5607

Activatedcarbons from invasive Parkinsoniaaculeata woodsawdust were developed by microwave assisted H3PO4 acid activation varying theradiation time (2?10 min). Their main physicochemical characteristicsweredetermined, and compared with those of a sample previously obtained byconventional heating using the same precursor, chemical agent, and impregnationratio. The activated carbons developed for radiation times of 5 and 10 minshowed higher BET surface areas (~1300 m2/g) and total pore volume (1 cm3/g) than those obtained at 2 min (~710 m2/g) or by conventional heating(~970 m2/g). Microwave assistedactivation also led to activated carbons with higher total amounts of acidicoxygen and basic functionalities in comparison with the sample arising fromconventional heating. Phenol adsorption capacity for all the samples was alsoevaluated from determination of the adsorption isotherms and their proper descriptionby the Freundlich model. The adsorption capacity for the activated carbonsobtained at 5 and 10 min was almost twice