Repository of Research and Investigative Information

Repository of Research and Investigative Information

Hormozgan University of Medical Sciences

Synthesis and characterization of citrate intercalated layered double hydroxide as a green adsorbent for Ni<sup>2+</sup> and Pb<sup>2+</sup> removal

(2018) Synthesis and characterization of citrate intercalated layered double hydroxide as a green adsorbent for Ni<sup>2+</sup> and Pb<sup>2+</sup> removal. Environmental Science and Pollution Research.

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Official URL: https://link.springer.com/article/10.1007/s11356-0...

Abstract

Recently, a considerable attention has been paid on the preparation of layered double hydroxide (LDH) as a green adsorbent. This research presents a study on nickel and lead removal by Ca/Fe layered double hydroxides intercalate with citrate anions (Ca-Fe/LDH-Cit) which was successfully prepared through the co-precipitation and hydrothermal method. The as-synthesized Ca-Fe/LDH-Cit was characterized by various techniques including FT-IR, XRD, TGA, FE-SEM, and TEM techniques. The maximum uptake capacities of Ca-Fe/LDH-Cit were 2.26 mg/g for Ni(II) and 61.73 mg/g for Pb(II) inferred from the Langmuir model at the contact time of 30 min and pH of 7. Based on the results, the adsorption and kinetic isotherms were in good agreement with the Langmuir model and the pseudo-second-order equation, respectively. The results suggested that the composite adsorbent has the good ability to remove the Ni2+ and Pb2+ ions from aqueous solutions. The results reveal that the composite adsorbent can be considered as a high-capacity absorbent for Ni(II) and Pb(II) removal and also as a potential candidate for practical applications.

Item Type: Article
Keywords: Ca/Fe layered double hydroxides Citrate anions Green adsorbent Heavy metals removal Isotherms
Subjects: WA Public Health > WA 670-847 Environmental Pollution. Sanitation
Depositing User: هدی فهیم پور
URI: http://eprints.hums.ac.ir/id/eprint/6220

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