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Type: Artigo de periódico
Title: Immobilized 3-aminopyridine On Silica: Adsorption Of Some Metal (ii) Chlorides In Non-aqueous Solutions
Author: Airoldi C.
Goncalves A.S.
Abstract: A new silica gel, modified by 3-(N-propyl) aminopyridine, having 2.5 × 10-4 mol g-1 of the immobilized organic molecule, can adsorb metal (II) chlorides from ethanol and acetone at 298 K. The chemisorption isotherms could be fitted by a modified Langmuir equation and are similar for all metals. The capacity to adsorb ions from solution showed the sequence Cu > Co > Zn and Cu > Zn > Co > Ni in acetone and ethanol, respectively. With exception of CuCl2 which gave ΔH = 2.38 ± 0.05 kJ mol-1, all other interactions between metal ions and immobilized material are zero in acetone. Based on an approximate calculation, it was estimated that the anchored groups protrude 1.1 nm from the surface, and the mean distance between them is 1.86 nm. © 1987.
Rights: fechado
Identifier DOI: 10.1016/0166-6622(87)80184-1
Date Issue: 1987
Appears in Collections:Unicamp - Artigos e Outros Documentos

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