期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 170, 期 2-3, 页码 1227-1235出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2009.05.102
关键词
Indigo; Sorption; Pyrolysis; Carbonaceous material; Fe-zeolitic tuff
资金
- CONACYT [46219-Q]
- Universidad Autonoma del Estado de Mexico [2452/2007 U]
- [170350]
Indigo carmine removal from aqueous solution has been evaluated using Fe-zeolitic tuff and carbonaceous material from pyrolyzed sewage sludge treated with HCl (CM). The adsorbents were characterized by scanning electron microscopy, BET surface area and X-ray diffraction. Sorption kinetics and isotherms were determined and the adsorption behaviors analyzed. Kinetic pseudo-second order and Langmuir-Freundlich models were successfully applied to the experimental results obtained with the Fe-zeolitic material, while kinetic first order and Langmuir-Freundlich models were applied to the results from the carbonaceous materials. This indicates mechanisms of chemisorption and physic sorption, respectively, on the heterogeneous materials. The results indicate that the carbonaceous material from the pyrolysis of sewage sludge (sorption capacity 92.83 mg/g) is a better adsorbent of indigo carmine than the zeolitic material (sorption capacity 32.83 mg/g). (C) 2009 Elsevier B.V. All rights reserved.
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