Pb(II) Sorption under Batch and Continuous Mode Using Natural, Pretreated, and Amino-Modified Ectodermis of Opuntia

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• 作者：L. A. Bernal-Mart&iacute ; nez ; S. Herná ; ndez-Ló ; pez ; C. Barrera-D&iacute ; az ; * ; F. Ureñ ; a-Nú ; ñ ; ez ; B. Bilyeu
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2008
• 出版时间：February 20, 2008
• 年：2008
• 卷：47
• 期：4
• 页码：1026 - 1034
• 全文大小：425K
• 年卷期：v.47,no.4(February 20, 2008)
• ISSN：1520-5045

文摘

This work presents the conditions for Pb(II) removal from aqueous solution using natural, pretreated, andamino-modified Ectodermis of Opuntia. The sorbent materials were characterized using Scanning ElectronMicroscopy, Fourier Transformed Infrared spectroscopy, Thermogravimetric Analysis (TGA) and UV-visspectrometry, before and after contact with aqueous Pb(II) solutions. Pretreated Ectodermis of Opuntia withformaldehyde was the best material for the sorption of Pb(II). The Pb(II) uptake process was at a maximumat pH 5.0, which showed an adsoption capacity that was adequately described by a Langmuir adsorptionisotherm. The Metcalf-Eddy model was used to describe the adsorption data from column studies; the sorptioncapacity was 58.46 mg Pb(II)/g for pretreated Ectodermis of Opuntia with 96% removal.