Metal contaminants are generally removed from effluents by chemical and physical processes which are often associated with disadvantages such as the use of toxic reagents, generation of toxic waste and high costs. Hence, new techniques have been developed, among them the study of natural adsorbents, for instance, the use of Moringa oleifera seeds. The potential of M. oleifera seeds for nickel removal in aqueous systems was investigated. The seeds utilized were obtained from plants grown in Uberlândia/Brazil. After being dried and pulverized, the seeds were treated with 0.1 mol/L NaOH. Fourier transform infrared spectroscopy, scanning electron microscopy and thermogravimetric analyses were used for the characterization of the material. Using the optimized methodology (50 mL of 4.0 mg/L Ni(II), pH range of 4.0–6.0, agitation time of 5 min and adsorption mass of 2.0 g) more than 90% of Ni(II) could be removed from water samples. The sorption data were fitted satisfactorily by the Langmuir adsorption model. Evaluation applying the Langmuir equation gave the monolayer sorption capacity as 29.6 mg/g. The results indicate that this material could be employed in the extraction of nickel, considering its ease of use, low cost and environmental viability, which make it highly attractive for application in developing countries.
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Research Article|
April 01 2012
Removal of Ni(II) from aqueous solution using Moringa oleifera seeds as a bioadsorbent Available to Purchase
Thiago L. Marques;
Thiago L. Marques
1Instituto de Química, Universidade Federal de Uberlândia, Av. João Naves de Ávila 2121, CEP 38400-902, Uberlândia, MG, Brazil
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Vanessa N. Alves;
Vanessa N. Alves
1Instituto de Química, Universidade Federal de Uberlândia, Av. João Naves de Ávila 2121, CEP 38400-902, Uberlândia, MG, Brazil
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Luciana M. Coelho;
2Departamento de Química, Universidade Federal de Goiás, Av. Doutor Lamartine Pinto de Avelar, 1120 Setor Universitário, CEP 75704-020, Catalão, GO, Brazil
E-mail: [email protected]
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Nívia M. M. Coelho
Nívia M. M. Coelho
1Instituto de Química, Universidade Federal de Uberlândia, Av. João Naves de Ávila 2121, CEP 38400-902, Uberlândia, MG, Brazil
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Water Sci Technol (2012) 65 (8): 1435–1440.
Article history
Received:
September 29 2011
Accepted:
December 02 2011
Citation
Thiago L. Marques, Vanessa N. Alves, Luciana M. Coelho, Nívia M. M. Coelho; Removal of Ni(II) from aqueous solution using Moringa oleifera seeds as a bioadsorbent. Water Sci Technol 1 April 2012; 65 (8): 1435–1440. doi: https://doi.org/10.2166/wst.2012.026
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