Removal of Cadmium Ions from Water by Synthetic Niobia

The feasibility of using synthetic niobia, both pure and modified with H 2 O 2 , as adsorbents for the removal of Cd 2+ ions from aqueous solution has been studied. Different adsorption isotherms were obtained using Cd 2+ ion concentrations ranging from 10 mg/ℓ to 500 mg/ℓ. At an initial pH value of...

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Main Authors: Érika S. Melo, Kele T.G. Carvalho, Luiz C.A. Oliveira
Format: Article
Language:English
Published: SAGE Publishing 2011-08-01
Series:Adsorption Science & Technology
Online Access:https://doi.org/10.1260/0263-6174.29.8.789
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author Érika S. Melo
Kele T.G. Carvalho
Luiz C.A. Oliveira
author_facet Érika S. Melo
Kele T.G. Carvalho
Luiz C.A. Oliveira
author_sort Érika S. Melo
collection DOAJ
description The feasibility of using synthetic niobia, both pure and modified with H 2 O 2 , as adsorbents for the removal of Cd 2+ ions from aqueous solution has been studied. Different adsorption isotherms were obtained using Cd 2+ ion concentrations ranging from 10 mg/ℓ to 500 mg/ℓ. At an initial pH value of 4.5, the Cd 2+ ion adsorption capacity of synthetic niobia at 298 K was estimated as 182 mg/g. The Freundlich adsorption isotherm model gave the better fit to the equilibrium adsorption data for Cd 2+ ions. The thermodynamic parameters for the studied system showed that the adsorption process was spontaneous and endothermic. The results obtained suggest that niobia may be employed as an efficient material for the removal of Cd 2+ ions from aqueous solution.
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institution Kabale University
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publishDate 2011-08-01
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record_format Article
series Adsorption Science & Technology
spelling doaj-art-f8b997074e7c478598fdf091d33c07442025-02-03T10:07:41ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382011-08-012910.1260/0263-6174.29.8.789Removal of Cadmium Ions from Water by Synthetic NiobiaÉrika S. Melo0Kele T.G. Carvalho1Luiz C.A. Oliveira2 Department of Chemistry, Federal University of Lavras, 37200-000, Lavras, Minas Gerais, Brazil Department of Chemistry, Federal University of Lavras, 37200-000, Lavras, Minas Gerais, Brazil Department of Chemistry, Federal University of Minas Gerais, 31270-901, Belo Horizonte, Minas Gerais, BrazilThe feasibility of using synthetic niobia, both pure and modified with H 2 O 2 , as adsorbents for the removal of Cd 2+ ions from aqueous solution has been studied. Different adsorption isotherms were obtained using Cd 2+ ion concentrations ranging from 10 mg/ℓ to 500 mg/ℓ. At an initial pH value of 4.5, the Cd 2+ ion adsorption capacity of synthetic niobia at 298 K was estimated as 182 mg/g. The Freundlich adsorption isotherm model gave the better fit to the equilibrium adsorption data for Cd 2+ ions. The thermodynamic parameters for the studied system showed that the adsorption process was spontaneous and endothermic. The results obtained suggest that niobia may be employed as an efficient material for the removal of Cd 2+ ions from aqueous solution.https://doi.org/10.1260/0263-6174.29.8.789
spellingShingle Érika S. Melo
Kele T.G. Carvalho
Luiz C.A. Oliveira
Removal of Cadmium Ions from Water by Synthetic Niobia
Adsorption Science & Technology
title Removal of Cadmium Ions from Water by Synthetic Niobia
title_full Removal of Cadmium Ions from Water by Synthetic Niobia
title_fullStr Removal of Cadmium Ions from Water by Synthetic Niobia
title_full_unstemmed Removal of Cadmium Ions from Water by Synthetic Niobia
title_short Removal of Cadmium Ions from Water by Synthetic Niobia
title_sort removal of cadmium ions from water by synthetic niobia
url https://doi.org/10.1260/0263-6174.29.8.789
work_keys_str_mv AT erikasmelo removalofcadmiumionsfromwaterbysyntheticniobia
AT keletgcarvalho removalofcadmiumionsfromwaterbysyntheticniobia
AT luizcaoliveira removalofcadmiumionsfromwaterbysyntheticniobia