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Effective Removal of Iron (II) from Aqueous Solution by Adsorption using Zn/Cr Layered Double Hydroxides Intercalated with Keggin Ion

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Zn/Cr and Zn/Cr layered double hydroxides (LDHs) intercalated with Keggin ion [α-SiW12O40]4-were successfully synthesized at room temperature and pH value of 10. The synthesized materials were characterized by means of the XRD, BET, and FT-IR analyses and used as an adsorbent iron(II). The adsorption process was investigated by studying pH, the kinetics, and thermodynamic properties of the adsorption process. The results showed the interlayer Zn/Cr LDHs was 7.53 Å and increase to 10.26 Å on Zn/Cr LDHs intercalated with Keggin ion [α-SiW12O40]4-. The BET analysis showed that the pore volume of both materials increased from 0.063 cm3 g-1 to 0.163 cm3 g-1. The pH point zero charge measurement for the Zn/Cr LDHs material was 10 while LDHs Zn/Cr intercalated with Keggin ion [α-SiW12O40]4- was 8. Zn/Cr LDHs intercalated with Keggin ion [α-SiW12O40]4- has higher adsorption capacity than Zn/Cr LDHs without intercalation. Desorption of iron (III) was successfully conducted using HCl as reagent showing the involvement of ion exchange in the adsorption.
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Bibliogr. 21 poz., rys., tab.
  • Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya University, Jl. Padang Selasa Bukit Besar Palembang 30139, Indonesia
  • Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya University, Jl. Padang Selasa Bukit Besar Palembang 30139, Indonesia
  • Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya University, Jl. Padang Selasa Bukit Besar Palembang 30139, Indonesia
  • Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sriwijaya University, Jl. Padang Selasa Bukit Besar Palembang 30139, Indonesia
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Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).
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