Development and characterization of microwave-assisted activated carbons from Parkinsonea aculeata wood

G. V. NUNELL; M,E. FERNANDEZ; P. R. 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 Parkinsonia aculeata woodsawdust were developed by microwave assisted H3PO4acid activation varying the radiation time (2?10 min). Theirmain physicochemical characteristicswere determined, and compared with those ofa sample previously obtained by conventional heating using the same precursor,chemical agent, and impregnation ratio. The activated carbons developed forradiation times of 5 and 10 min showed 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 assisted activation also led to activated carbons with higher totalamounts of acidic oxygen and basic functionalities in comparison with thesample arising from conventional heating. Phenol adsorption capacity for allthe samples was also evaluated from determination of the adsorption isothermsand their proper description by the Freundlich model. The adsorption capacityfor the activated carbons obtained at 5 and 10 min was almost twice