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Lead Adsorption by Nano-Hydroxyapatite Granules in a Fixed-Bed Column

Mohamad Reza Khademolhosseini1, Iman Mobasherpour2, Davoud Ghahremani1
Affiliation: 
1 Department of Engineering, Maybod Branch, Islamic Azad University, Maybod, Iran 2 Ceramics Department, Materials and Energy Research Center, P.O. Box 31787-316, Karaj, Iran Iman.Mobasherpour@gmail.com
DOI: 
https://doi.org/10.23939/chcht12.03.372
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Keywords:

Abstract: 
The sorption of Pb2+ ions was conducted in a fixed-bed column by using nano-hydroxyapatite granules. The breakthrough and exhaustion time decreased with increasing flow rate, decreasing bed depth and increasing influent lead concentration. The proposed mechanism is a partial dissolution of calcium followed by the precipitation of an apatite by the ion-exchange mechanism with the formula Ca10−xPbx(PO4)6(OH)2 and Pb10(PO4)6(OH)2.
References: 

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