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Publikācija: Adsorption of Lead (II) in Liquid-Solid Interfaces on Natural and Modified Hydroxyapatite

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Nosaukums oriģinālvalodā Adsorption of Lead (II) in Liquid-Solid Interfaces on Natural and Modified Hydroxyapatite
Pētniecības nozare 1. Dabaszinātnes
Pētniecības apakšnozare 1.4. Ķīmija
Autori Samia Benhammadi
Andrejs Šiškins
Abdelkader Iddou
Hakim Aguedal
Louis-Charles de Menorval
Atslēgas vārdi Pb(II), Hydroxyapatite, chemical modification, lactic acid, adsorption
Anotācija The removal of lead from aqueous solutions was studied using the liquid-solid extraction method. The solids used are raw phosphocalcic hydroxyapatite [Ca10(PO4)6(OH)2] (HAPr) and phosphocalcic hydroxyapatite treated with 5 % lactic acid solution (HAPal). The extraction results showed the influence of the initial concentration of Pb(II) and temperature of the suspensions. The maximum adsorption capacities of each material (HAPr and HAPal) were obtained with the application of Langmuir adsorption model. The most important quantity was founded as 41,84mg/g for HAPal. Isotherms established at different temperatures showed that this parameter affects greatly the adsorption of Pb(II) on both adsorbents. The best results were obtained at room temperature (25°C) compared with those recorded at 50°C. Finally, the results of this study allow us to note that the hydroxyapatite material can be considered as a good extractant solid, for heavy metals, especially when it is modified with lactic acid.
DOI: 10.4028/www.scientific.net/KEM.721.117
Hipersaite: http://www.scientific.net/KEM.721.117 
Atsauce Benhammadi, S., Šiškins, A., Iddou, A., Aguedal, H., Menorval, L. Adsorption of Lead (II) in Liquid-Solid Interfaces on Natural and Modified Hydroxyapatite. Key Engineering Materials, 2017, Vol.721, 117.-122.lpp. ISSN 1013-9826. e-ISSN 1662-9795. Pieejams: doi:10.4028/www.scientific.net/KEM.721.117
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