Preparation and characterization of nano-hydroxyapatite and its competitive adsorption kinetics of copper and lead ions in water
Authors:
Open Access
- 1 January 2016
- journal article
- research article
- Published by SAGE Publications in Nanomaterials and Nanotechnology
- Vol. 6
Abstract
In this work, microemulsion and hydrothermal methods were combined to synthesize hydroxyapatite nanomaterials. Competitive adsorption kinetics of aqueous Pb2+ and Cu2+ on nano-hydroxyapatite surfaces were investigated by performing adsorption kinetic experiments. Results showed that the adsorption quantity of Pb2+ on nano-hydroxyapatite was higher than that of Cu2+ in the single system. However, the competitive adsorption of Pb2+ and Cu2+ occurred in the coexistence system of Pb2+ and Cu2+. The adsorption quantity of Cu2+ on nano-hydroxyapatite increased, whereas that of Pb2+ decreased. The adsorption quantities of Pb2+ and Cu2+ on nano-hydroxyapatite presented a marked linear relationship with Ca2+ release from nano-hydroxyapatite (R2 0.861 to 0.954). The adsorption kinetics were fitted with the first-order, second-order, parabola, Elovich, double-constant, and Lennard–Jones function equations. Among these equations, the second-order equation and power function kinetics fitted the results optimally. Overall, the results indicate that the adsorption kinetics of Pb2+ and Cu2+ on nano-hydroxyapatite represent complex adsorption processes with both chemical reaction and physical adsorption.Keywords
This publication has 10 references indexed in Scilit:
- Adsorption characterization of Pb(II) and Cu(II) ions onto chitosan-tripolyphosphate beads: Kinetic, equilibrium and thermodynamic studiesJournal of Environmental Management, 2010
- Adsorption Kinetics of Glyphosate and Copper(II) Alone and Together on Two Types of SoilsSoil Science Society of America Journal, 2009
- Preparation and characterization of nano-hydroxyapatite powder using sol-gel techniqueBulletin of Materials Science, 2009
- Synthesis and Stability of Lead-hydroxyapatiteJournal of Inorganic Materials, 2009
- Preparation and lead ion removal property of hydroxyapatite/polyacrylamide composite hydrogelsJournal of Hazardous Materials, 2008
- Removal of lead ions in aqueous solution by hydroxyapatite/polyurethane composite foamsJournal of Hazardous Materials, 2008
- Cadmium removal from single- and multi-metal () solutions by sorption on hydroxyapatiteJournal of Colloid and Interface Science, 2008
- Copper and zinc decontamination from single- and binary-metal solutions using hydroxyapatiteJournal of Hazardous Materials, 2007
- Sorption kinetics and leachability of heavy metal from the contaminated soil amended with immobilizing agent (humus soil and hydroxyapatite)Chemosphere, 2006
- Effects of Aqueous Al, Cd, Cu, Fe(II), Ni, and Zn on Pb Immobilization by HydroxyapatiteEnvironmental Science & Technology, 1994