Rodica Elena Patescu, Claudia Maria Simonescu, Laurentiu Teodor BusuioC, Cristian Onose, Alina Melinescu<br>Simultaneous Removal of Lead(II), Nickel(II), Zinc(II) and <br>Copper(II) from Aqueous Solutions by Nano-hydroxyapatite Synthesized by Microwave Field

Rodica Elena Patescu, Claudia Maria Simonescu, Laurentiu Teodor BusuioC, Cristian Onose, Alina Melinescu
Simultaneous Removal of Lead(II), Nickel(II), Zinc(II) and
Copper(II) from Aqueous Solutions by Nano-hydroxyapatite Synthesized by Microwave Field

Abstract:

In the present work, nano-hydroxyapatite (nano-HAP) prepared in microwave field was applied to remove lead(II), nickel(II), zinc(II) and copper(II) from polycationic aqueous solutions. Optimum adsorption conditions were evaluated using batch experiments. Effect of various physicochemical parameters such as: pH, contact time, and initial ion concentration on adsorption of metal ions onto nano-HAP was evaluated. Batch experiments revealed that removal ration decreased in the order: 87.1% for Pb(II), 44.66% for Zn(II), 20.39% for Cu(II) and 19.97% for Ni(II) in mixed solutions with the initial solution with concentration 90.72 mg Pb(II)/L, 92.32 mg Zn(II)/L, 108.8 mg Cu(II)/L, and 99.39 mg Ni(II)/L. The maximum adsorption capacity of lead, nickel, zinc and copper determined were 79.02 mg/g, 19.85 mg/g, 41.23 mg/g and 22.18 mg/g. The results of this research study can lead to the conclusion that nano-hydroxyapatite can be used as a cost-effective material for the removal of lead, nickel, zinc and copper from polycationic aqueous solutions.and wastewater. The selectivity of this material follows the series: Pb(II) ] Zn(II) ] Cu(II) ] Ni(II). Keywords: lead, nickel, zinc and copper removal, nano-hydroxyapatite, microwave heating

Issue: 2016, Volume 67, Issue 10

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