Adsorption isotherm studies of Cd (II), Pb (II) and Zn (II) ions bioremediation from aqueous solution using unmodified and EDTA-modified maize cob
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Universidade Estadual Paulista Júlio de Mesquita Filho
2007
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| _version_ | 1876457966071185408 |
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| author | J. C. Igwe |
| author_facet | J. C. Igwe |
| contents | Adsorption isotherm studies of Cd (II), Pb (II) and Zn (II) ions bioremediation from aqueous solution using unmodified and EDTA-modified maize cob J. C. Igwe A.A. Abia Química EDTA maize cob heavy metal waste water Adsorption isotherm The need to clean-up heavy metal contaminated environment can not be over emphasized.This paper describes the adsorption isotherm studies of Cd (II), Pb (II) and Zn (II) ions from aqueoussolution using unmodified and EDTA-modified maize cob. Maize cob was found to be an excellent adsorbent for the removal of these metal ions. The amount of metal ions adsorbed increased as the initial concentration increased. Also, EDTA- modification enhanced the adsorption capacity of maize cob probably due to the chelating ability of EDTA. Among the three adsorption isotherm tested, Dubinin-Radushkevich gave the best fit with R² value ranging from 0.9539 to 0.9973 and an average value of0.9819. This is followed by Freundlich isotherm (Ave. 0.9783) and then the Langmuir isotherm (Ave. 0.7637). The sorption process was found to be a physiosorption process as seen from the apparent energy of adsorption which ranged from 2.05KJ\mol to 4.56KJ\mol. Therefore, this study demonstrates that maize cob which is an environmental pollutant could be used to adsorb heavy metals and achievecleanliness thereby abating environmental nuisance caused by the maize cob. 2007 artículo científico 0100-4670 https://www.redalyc.org/articulo.oa?id=42932105 en http://www.redalyc.org/revista.oa?id=429 Eclética Química application/pdf Universidade Estadual Paulista Júlio de Mesquita Filho Eclética Química (Brasil) Num.1 Vol.32 |
| format | Artículo científico |
| id | redalyc_42932105 |
| institution | Redalyc |
| language | en |
| publishDate | 2007 |
| publisher | Universidade Estadual Paulista Júlio de Mesquita Filho |
| spellingShingle | Adsorption isotherm studies of Cd (II), Pb (II) and Zn (II) ions bioremediation from aqueous solution using unmodified and EDTA-modified maize cob J. C. Igwe Química EDTA maize cob heavy metal waste water Adsorption isotherm Adsorption isotherm studies of Cd (II), Pb (II) and Zn (II) ions bioremediation from aqueous solution using unmodified and EDTA-modified maize cob J. C. Igwe A.A. Abia Química EDTA maize cob heavy metal waste water Adsorption isotherm The need to clean-up heavy metal contaminated environment can not be over emphasized.This paper describes the adsorption isotherm studies of Cd (II), Pb (II) and Zn (II) ions from aqueoussolution using unmodified and EDTA-modified maize cob. Maize cob was found to be an excellent adsorbent for the removal of these metal ions. The amount of metal ions adsorbed increased as the initial concentration increased. Also, EDTA- modification enhanced the adsorption capacity of maize cob probably due to the chelating ability of EDTA. Among the three adsorption isotherm tested, Dubinin-Radushkevich gave the best fit with R² value ranging from 0.9539 to 0.9973 and an average value of0.9819. This is followed by Freundlich isotherm (Ave. 0.9783) and then the Langmuir isotherm (Ave. 0.7637). The sorption process was found to be a physiosorption process as seen from the apparent energy of adsorption which ranged from 2.05KJ\mol to 4.56KJ\mol. Therefore, this study demonstrates that maize cob which is an environmental pollutant could be used to adsorb heavy metals and achievecleanliness thereby abating environmental nuisance caused by the maize cob. 2007 artículo científico 0100-4670 https://www.redalyc.org/articulo.oa?id=42932105 en http://www.redalyc.org/revista.oa?id=429 Eclética Química application/pdf Universidade Estadual Paulista Júlio de Mesquita Filho Eclética Química (Brasil) Num.1 Vol.32 |
| title | Adsorption isotherm studies of Cd (II), Pb (II) and Zn (II) ions bioremediation from aqueous solution using unmodified and EDTA-modified maize cob |
| topic | Química EDTA maize cob heavy metal waste water Adsorption isotherm |
| url | https://www.redalyc.org/articulo.oa?id=42932105 |