Removal of chromate from aqueous solution by reduction with nanoscale Fe–Al layered double hydroxide

Leila Alidokht; Shahin Oustan; Alireza Khataee; Mohammadreza Neyshabouri; Adel Reyhanitabar

doi:10.1007/s11164-017-3231-x

Removal of chromate from aqueous solution by reduction with nanoscale Fe–Al layered double hydroxide

Leila Alidokht, Shahin Oustan^*, Alireza Khataee, Mohammadreza Neyshabouri, Adel Reyhanitabar

^*Bu çalışma için yazışmadan sorumlu yazar

University of Tabriz

Araştırma sonucu: Dergiye katkı › Makale › bilirkişi

12 Atıf (Scopus)

Özet

Nanoscale layered double hydroxides of Fe^II and Al^III (Fe–Al LDH) have been applied for removal of chromate (Cr^VI) from aqueous solution. Given the reaction stoichiometry, Cr^VI was completely reduced to Cr^III and coprecipitated with Fe^III and Al^III oxyhydroxides. The extent of Cr^VI removal decreased with increasing initial pH and decreasing molar ratio of Cr^VI/structural Fe^II in the LDH. The chromate reduction rate at different initial concentrations of Cr^VI was well described by the pseudo-second-order model with reaction rate constant ranging from 197.4 to 13.53 (mmol min)⁻¹. Initial pH and substitution of various amounts of Fe^III in the LDH structure had little effect on the reaction rate. Backtransformation of Cr^III to Cr^VI by birnessite Mn oxide (δ-MnO₂) after 40 days of reaction was less than 1% of the initial Cr (as Cr^III solid), indicating high stability of the final reaction products and high efficiency of nanoscale Fe–Al LDHs for removal of chromate from aqueous solution.

Orijinal dil	İngilizce
Sayfa (başlangıç-bitiş)	2319-2331
Sayfa sayısı	13
Dergi	Research on Chemical Intermediates
Hacim	44
Basın numarası	4
DOI'lar	https://doi.org/10.1007/s11164-017-3231-x
Yayın durumu	Yayınlandı - 1 Nis 2018
Harici olarak yayınlandı	Evet

Bibliyografik not

Publisher Copyright:
© 2017, Springer Science+Business Media B.V., part of Springer Nature.

Belgeye Erişim

10.1007/s11164-017-3231-x

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Link to publication in Scopus

Alıntı Yap

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title = "Removal of chromate from aqueous solution by reduction with nanoscale Fe–Al layered double hydroxide",

abstract = "Nanoscale layered double hydroxides of FeII and AlIII (Fe–Al LDH) have been applied for removal of chromate (CrVI) from aqueous solution. Given the reaction stoichiometry, CrVI was completely reduced to CrIII and coprecipitated with FeIII and AlIII oxyhydroxides. The extent of CrVI removal decreased with increasing initial pH and decreasing molar ratio of CrVI/structural FeII in the LDH. The chromate reduction rate at different initial concentrations of CrVI was well described by the pseudo-second-order model with reaction rate constant ranging from 197.4 to 13.53 (mmol min)−1. Initial pH and substitution of various amounts of FeIII in the LDH structure had little effect on the reaction rate. Backtransformation of CrIII to CrVI by birnessite Mn oxide (δ-MnO2) after 40 days of reaction was less than 1% of the initial Cr (as CrIII solid), indicating high stability of the final reaction products and high efficiency of nanoscale Fe–Al LDHs for removal of chromate from aqueous solution.",

keywords = "Backtransformation, Birnessite, Chromate reduction, Kinetic modeling, Nanoscale Fe–Al LDH, XPS analysis",

author = "Leila Alidokht and Shahin Oustan and Alireza Khataee and Mohammadreza Neyshabouri and Adel Reyhanitabar",

note = "Publisher Copyright: {\textcopyright} 2017, Springer Science+Business Media B.V., part of Springer Nature.",

year = "2018",

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day = "1",

doi = "10.1007/s11164-017-3231-x",

language = "English",

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TY - JOUR

T1 - Removal of chromate from aqueous solution by reduction with nanoscale Fe–Al layered double hydroxide

AU - Alidokht, Leila

AU - Oustan, Shahin

AU - Khataee, Alireza

AU - Neyshabouri, Mohammadreza

AU - Reyhanitabar, Adel

PY - 2018/4/1

Y1 - 2018/4/1

N2 - Nanoscale layered double hydroxides of FeII and AlIII (Fe–Al LDH) have been applied for removal of chromate (CrVI) from aqueous solution. Given the reaction stoichiometry, CrVI was completely reduced to CrIII and coprecipitated with FeIII and AlIII oxyhydroxides. The extent of CrVI removal decreased with increasing initial pH and decreasing molar ratio of CrVI/structural FeII in the LDH. The chromate reduction rate at different initial concentrations of CrVI was well described by the pseudo-second-order model with reaction rate constant ranging from 197.4 to 13.53 (mmol min)−1. Initial pH and substitution of various amounts of FeIII in the LDH structure had little effect on the reaction rate. Backtransformation of CrIII to CrVI by birnessite Mn oxide (δ-MnO2) after 40 days of reaction was less than 1% of the initial Cr (as CrIII solid), indicating high stability of the final reaction products and high efficiency of nanoscale Fe–Al LDHs for removal of chromate from aqueous solution.

AB - Nanoscale layered double hydroxides of FeII and AlIII (Fe–Al LDH) have been applied for removal of chromate (CrVI) from aqueous solution. Given the reaction stoichiometry, CrVI was completely reduced to CrIII and coprecipitated with FeIII and AlIII oxyhydroxides. The extent of CrVI removal decreased with increasing initial pH and decreasing molar ratio of CrVI/structural FeII in the LDH. The chromate reduction rate at different initial concentrations of CrVI was well described by the pseudo-second-order model with reaction rate constant ranging from 197.4 to 13.53 (mmol min)−1. Initial pH and substitution of various amounts of FeIII in the LDH structure had little effect on the reaction rate. Backtransformation of CrIII to CrVI by birnessite Mn oxide (δ-MnO2) after 40 days of reaction was less than 1% of the initial Cr (as CrIII solid), indicating high stability of the final reaction products and high efficiency of nanoscale Fe–Al LDHs for removal of chromate from aqueous solution.

KW - Backtransformation

KW - Birnessite

KW - Chromate reduction

KW - Kinetic modeling

KW - Nanoscale Fe–Al LDH

KW - XPS analysis

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U2 - 10.1007/s11164-017-3231-x

DO - 10.1007/s11164-017-3231-x

M3 - Article

AN - SCOPUS:85038118292

SN - 0922-6168

VL - 44

SP - 2319

EP - 2331

JO - Research on Chemical Intermediates

JF - Research on Chemical Intermediates

IS - 4

ER -

Removal of chromate from aqueous solution by reduction with nanoscale Fe–Al layered double hydroxide

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