Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/92607
Type: Artigo de periódico
Title: Removal Of Cadmium From Thermally Activated Toritama (pernambuco State, Brazil) Clay Under Finite Bath Conditions) [remoção De Cádmio A Partir Da Argila De Toritama (estado De Pernambuco) Ativada Termicamente Em Sistema De Banho Finito]
Author: Silva M.L.P.
Rodrigues M.G.F.
Silva M.G.C.
Abstract: The purpose of this study is to characterize the clay of Toritama (Pernambuco, Brazil), in its form 'in nature', and also after thermal activation at 500 No.C, aiming its use in the removal of Cd2+. The clay 'in nature' was characterized byg X-ray spectrometry by dispersive energy (EDX), X-ray diffraction (XRD), and surface area measurement by physical adsorption of nitrogen (BET). The thermally activated clay (100, 200, 300, 400 e 500 No.C) was characterized by XRD. The thermally activated clay (500 No.C) was characterized by EDX and surface area measurement (BET). The removal of Cd2+ by the thermally activated clay was carried out in a finite bath system. The thermal treatment of the clays slightly modified their area but did not change the pore diameters distribution. The experimental data for the finite bath system could be adjusted to both the studied adsorption isotherm models, Langmuir and Freundlich. However the Freundlich model was more satisfactory. The process of cadmium removal, in finite bath system, for thermally activated clay (500 No.C) reaches the equilibrium after 120 min and presents about 86.8 % of cadmium removal.
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Rights: aberto
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Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-66749164880&partnerID=40&md5=c9d63307dddbf128b09df516957dd01a
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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