Adsorption and kinetics of hazardous dye Rhodamine-b from aqueous solutions with activated carbon-based low-rank coal
Küçük Resim Yok
Tarih
2011
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Activated carbon was prepared from TuncbilekKütahya (Turkey) lignite by chemical activation with KOH (impregnation ratio 1:2). Pore characteristics of the activated carbon, such as BET surface area, pore volume, size distribution and the diameter of pores, were determined. BET surface area was found to be 902 m2/g, and other characteristic values are as follows: Smicro: 560 m2/g, Vtotal: 0.50 cm 3/g, Vmicro: 0.30 cm3/g and average pore diameter: 2.21 nm (4 V/A by BET). The prepared activated carbon was used to adsorb Rhodamine-B (RB) from aqueous solution in a batch reactor. The adsorption isotherm of process could be best identified using the Langmuir model since it gave a better fit and had a higher R2 value (0.9908) than Freundlich model. The kinetics of the adsorption of RB was tested using a pseudo-second order equation and an intraparticle diffusion model. Adsorption capacity was determined to be between 1.80-2.55 10-4 mol.g-1. It was found that the boundary layer thickness increased as the temperature increased (50.641 - 64.271). © by PSP.
Açıklama
Anahtar Kelimeler
Activated carbon (AC), Adsorption, Kinetics, Low-rank coal, Rhodamine b
Kaynak
Fresenius Environmental Bulletin
WoS Q Değeri
Scopus Q Değeri
N/A
Cilt
20
Sayı
2
