Preparation of Mg-Al layered double hydroxide doped with Fe2+ and its application to Cr(VI) removal

Tomohito Kameda; Eisuke Kondo; Toshiaki Yoshioka

doi:10.1016/j.seppur.2013.10.033

Preparation of Mg-Al layered double hydroxide doped with Fe²⁺ and its application to Cr(VI) removal

Tomohito Kameda, Eisuke Kondo, Toshiaki Yoshioka

Research output: Contribution to journal › Article › peer-review

54 Citations (Scopus)

Abstract

Mg-Al layered double hydroxide (Mg-Al LDH) doped with Fe²⁺ was prepared by dropwise addition of a mixed solution of MgCl₂, FeCl ₂, and AlCl₃ to NaOH solution at a constant pH. The Fe²⁺-doped LDH was found to be able to remove Cr(VI) from an aqueous solution through the anion exchange of Cr₂O72- with the intercalated Cl^-, the production of Cr(OH)₃, and the adsorption of Cr₂O72- on the surface of the produced FeO(OH). The excellent performance of this LDH for Cr(VI) removal is caused by both the anion exchange properties of Mg-Al LDH and the reducing activity of the Fe²⁺ doped into the Mg-Al LDH. This process can be considered to occur through Langmuir-type adsorption, and the maximum adsorption amount and equilibrium adsorption constant are 12.5 mmol g^-1 and 242.1, respectively.

Original language	English
Pages (from-to)	12-16
Number of pages	5
Journal	Separation and Purification Technology
Volume	122
DOIs	https://doi.org/10.1016/j.seppur.2013.10.033
Publication status	Published - 2014

Keywords

Cr(VI)
Doping
Layered double hydroxide
Removal

ASJC Scopus subject areas

Analytical Chemistry
Filtration and Separation

Access to Document

10.1016/j.seppur.2013.10.033

Cite this

@article{b5426d36c62b4f579f32694f6f44e3b2,

title = "Preparation of Mg-Al layered double hydroxide doped with Fe2+ and its application to Cr(VI) removal",

abstract = "Mg-Al layered double hydroxide (Mg-Al LDH) doped with Fe2+ was prepared by dropwise addition of a mixed solution of MgCl2, FeCl 2, and AlCl3 to NaOH solution at a constant pH. The Fe2+-doped LDH was found to be able to remove Cr(VI) from an aqueous solution through the anion exchange of Cr2O72- with the intercalated Cl-, the production of Cr(OH)3, and the adsorption of Cr2O72- on the surface of the produced FeO(OH). The excellent performance of this LDH for Cr(VI) removal is caused by both the anion exchange properties of Mg-Al LDH and the reducing activity of the Fe2+ doped into the Mg-Al LDH. This process can be considered to occur through Langmuir-type adsorption, and the maximum adsorption amount and equilibrium adsorption constant are 12.5 mmol g-1 and 242.1, respectively.",

keywords = "Cr(VI), Doping, Layered double hydroxide, Removal",

author = "Tomohito Kameda and Eisuke Kondo and Toshiaki Yoshioka",

note = "Funding Information: This research was partially supported by the Ministry of Education, Science, Sports, and Culture, Grant-in-Aid for Challenging Exploratory Research, 23651061, 2011–2013.",

year = "2014",

doi = "10.1016/j.seppur.2013.10.033",

language = "English",

volume = "122",

pages = "12--16",

journal = "Gas Separation and Purification",

issn = "1383-5866",

publisher = "Elsevier",

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TY - JOUR

T1 - Preparation of Mg-Al layered double hydroxide doped with Fe2+ and its application to Cr(VI) removal

AU - Kameda, Tomohito

AU - Kondo, Eisuke

AU - Yoshioka, Toshiaki

N1 - Funding Information: This research was partially supported by the Ministry of Education, Science, Sports, and Culture, Grant-in-Aid for Challenging Exploratory Research, 23651061, 2011–2013.

PY - 2014

Y1 - 2014

N2 - Mg-Al layered double hydroxide (Mg-Al LDH) doped with Fe2+ was prepared by dropwise addition of a mixed solution of MgCl2, FeCl 2, and AlCl3 to NaOH solution at a constant pH. The Fe2+-doped LDH was found to be able to remove Cr(VI) from an aqueous solution through the anion exchange of Cr2O72- with the intercalated Cl-, the production of Cr(OH)3, and the adsorption of Cr2O72- on the surface of the produced FeO(OH). The excellent performance of this LDH for Cr(VI) removal is caused by both the anion exchange properties of Mg-Al LDH and the reducing activity of the Fe2+ doped into the Mg-Al LDH. This process can be considered to occur through Langmuir-type adsorption, and the maximum adsorption amount and equilibrium adsorption constant are 12.5 mmol g-1 and 242.1, respectively.

AB - Mg-Al layered double hydroxide (Mg-Al LDH) doped with Fe2+ was prepared by dropwise addition of a mixed solution of MgCl2, FeCl 2, and AlCl3 to NaOH solution at a constant pH. The Fe2+-doped LDH was found to be able to remove Cr(VI) from an aqueous solution through the anion exchange of Cr2O72- with the intercalated Cl-, the production of Cr(OH)3, and the adsorption of Cr2O72- on the surface of the produced FeO(OH). The excellent performance of this LDH for Cr(VI) removal is caused by both the anion exchange properties of Mg-Al LDH and the reducing activity of the Fe2+ doped into the Mg-Al LDH. This process can be considered to occur through Langmuir-type adsorption, and the maximum adsorption amount and equilibrium adsorption constant are 12.5 mmol g-1 and 242.1, respectively.

KW - Cr(VI)

KW - Doping

KW - Layered double hydroxide

KW - Removal

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