화학공학소재연구정보센터
Industrial & Engineering Chemistry Research, Vol.47, No.4, 1026-1034, 2008
Pb(II) sorption under batch and continuous mode using natural, pretreated, and amino-modified ectodermis of Opuntia
This work presents the conditions for Pb(II) removal from aqueous solution using natural, pretreated, and amino-modified Ectodermis of Opuntia. The sorbent materials were characterized using Scanning Electron Microscopy, Fourier Transformed Infrared spectroscopy, Thermogravimetric Analysis (TGA) and UV-vis spectrometry, before and after contact with aqueous Pb(II) solutions. Pretreated Ectodermis of Opuntia with formaldehyde was the best material for the sorption of Pb(II). The Pb(II) uptake process was at a maximum at pH 5.0, which showed an adsoption capacity that was adequately described by a Langmuir adsorption isotherm. The Metcalf-Eddy model was used to describe the adsorption data from column studies; the sorption capacity was 58.46 mg Pb(II)/g for pretreated Ectodermis of Opuntia with 96% removal.