Effect of phase composition on sorption behavior of Ca-Mg phosphates towards Sr(II) ions in aqueous solution

Irina L. Shashkova; Andrei I. Ivanets; Nataliya V. Kitikova; Mika Sillanpää

doi:10.1016/j.jtice.2017.09.027

Effect of phase composition on sorption behavior of Ca-Mg phosphates towards Sr(II) ions in aqueous solution

Irina L. Shashkova, Andrei I. Ivanets, Nataliya V. Kitikova, Mika Sillanpää

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

14 Citations (Scopus)

Abstract

The selective removal of Sr(II) ions from aqueous solutions with high salinity (e.g. sea water) is an important objective. The removal of Sr(II) ions by Ca-Mg phosphate sorbents based on dolomite (PD-1 – hydrogen Ca-Mg phosphate, PD-2 – tertiary Ca-Mg phosphate, and PD-3 – a mixture of hydrogen Mg phosphate and Ca carbonate) from aqueous solutions of NaCl (10 g·L⁻¹) was assessed. The sorption capacity of the studied sorbents was 2.48, 2.24, and 1.79 mmol g⁻¹ for PD-1, PD-2 and PD-3, respectively. The isotherms of sorption of Sr(II) ions fitted the Redlich–Peterson and Sips equations. In 1 h, 80, 85 and 90% removal was reached for samples PD-1, PD-2 and PD-3, respectively. The sorption kinetics followed the pseudo-second order rate expression, which indicates the chemical interaction of sorbents with Sr(II) ions. The MgHPO₄ is the most active component in the sample PD-1, MgNH₄PO₄·6Н₂О along with Ca₃(PO₄)₂ makes a significant contribution to the sorption of Sr(II) onto PD-2, while MgHPO₄ and CaCO₃ most actively interact with Sr(II) ions in PD-3. The obtained Ca-Mg phosphate had a significantly higher sorption capacity towards Sr(II) than widely-used materials such as functionalized montmorillonite, titanosilicates, tungsten and antimony oxide, graphene oxide, and imprinted polymers.

Original language	English
Pages (from-to)	787-796
Number of pages	10
Journal	Journal of the Taiwan Institute of Chemical Engineers
Volume	80
DOIs	https://doi.org/10.1016/j.jtice.2017.09.027
Publication status	Published - Nov 2017
Externally published	Yes

Keywords

Ca-Mg phosphate
Isotherms modeling
Sorption
Sorption mechanisms
Sr(II) ions

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering

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10.1016/j.jtice.2017.09.027

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@article{daed805ec28a42dfb83549da54ca43d2,

title = "Effect of phase composition on sorption behavior of Ca-Mg phosphates towards Sr(II) ions in aqueous solution",

abstract = "The selective removal of Sr(II) ions from aqueous solutions with high salinity (e.g. sea water) is an important objective. The removal of Sr(II) ions by Ca-Mg phosphate sorbents based on dolomite (PD-1 – hydrogen Ca-Mg phosphate, PD-2 – tertiary Ca-Mg phosphate, and PD-3 – a mixture of hydrogen Mg phosphate and Ca carbonate) from aqueous solutions of NaCl (10 g·L−1) was assessed. The sorption capacity of the studied sorbents was 2.48, 2.24, and 1.79 mmol g−1 for PD-1, PD-2 and PD-3, respectively. The isotherms of sorption of Sr(II) ions fitted the Redlich–Peterson and Sips equations. In 1 h, 80, 85 and 90% removal was reached for samples PD-1, PD-2 and PD-3, respectively. The sorption kinetics followed the pseudo-second order rate expression, which indicates the chemical interaction of sorbents with Sr(II) ions. The MgHPO4 is the most active component in the sample PD-1, MgNH4PO4·6Н2О along with Ca3(PO4)2 makes a significant contribution to the sorption of Sr(II) onto PD-2, while MgHPO4 and CaCO3 most actively interact with Sr(II) ions in PD-3. The obtained Ca-Mg phosphate had a significantly higher sorption capacity towards Sr(II) than widely-used materials such as functionalized montmorillonite, titanosilicates, tungsten and antimony oxide, graphene oxide, and imprinted polymers.",

keywords = "Ca-Mg phosphate, Isotherms modeling, Sorption, Sorption mechanisms, Sr(II) ions",

author = "Shashkova, {Irina L.} and Ivanets, {Andrei I.} and Kitikova, {Nataliya V.} and Mika Sillanp{\"a}{\"a}",

note = "Publisher Copyright: {\textcopyright} 2017 Taiwan Institute of Chemical Engineers",

year = "2017",

month = nov,

doi = "10.1016/j.jtice.2017.09.027",

language = "English",

volume = "80",

pages = "787--796",

journal = "Journal of the Taiwan Institute of Chemical Engineers",

issn = "1876-1070",

publisher = "Taiwan Institute of Chemical Engineers",

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TY - JOUR

T1 - Effect of phase composition on sorption behavior of Ca-Mg phosphates towards Sr(II) ions in aqueous solution

AU - Shashkova, Irina L.

AU - Ivanets, Andrei I.

AU - Kitikova, Nataliya V.

AU - Sillanpää, Mika

PY - 2017/11

Y1 - 2017/11

N2 - The selective removal of Sr(II) ions from aqueous solutions with high salinity (e.g. sea water) is an important objective. The removal of Sr(II) ions by Ca-Mg phosphate sorbents based on dolomite (PD-1 – hydrogen Ca-Mg phosphate, PD-2 – tertiary Ca-Mg phosphate, and PD-3 – a mixture of hydrogen Mg phosphate and Ca carbonate) from aqueous solutions of NaCl (10 g·L−1) was assessed. The sorption capacity of the studied sorbents was 2.48, 2.24, and 1.79 mmol g−1 for PD-1, PD-2 and PD-3, respectively. The isotherms of sorption of Sr(II) ions fitted the Redlich–Peterson and Sips equations. In 1 h, 80, 85 and 90% removal was reached for samples PD-1, PD-2 and PD-3, respectively. The sorption kinetics followed the pseudo-second order rate expression, which indicates the chemical interaction of sorbents with Sr(II) ions. The MgHPO4 is the most active component in the sample PD-1, MgNH4PO4·6Н2О along with Ca3(PO4)2 makes a significant contribution to the sorption of Sr(II) onto PD-2, while MgHPO4 and CaCO3 most actively interact with Sr(II) ions in PD-3. The obtained Ca-Mg phosphate had a significantly higher sorption capacity towards Sr(II) than widely-used materials such as functionalized montmorillonite, titanosilicates, tungsten and antimony oxide, graphene oxide, and imprinted polymers.

AB - The selective removal of Sr(II) ions from aqueous solutions with high salinity (e.g. sea water) is an important objective. The removal of Sr(II) ions by Ca-Mg phosphate sorbents based on dolomite (PD-1 – hydrogen Ca-Mg phosphate, PD-2 – tertiary Ca-Mg phosphate, and PD-3 – a mixture of hydrogen Mg phosphate and Ca carbonate) from aqueous solutions of NaCl (10 g·L−1) was assessed. The sorption capacity of the studied sorbents was 2.48, 2.24, and 1.79 mmol g−1 for PD-1, PD-2 and PD-3, respectively. The isotherms of sorption of Sr(II) ions fitted the Redlich–Peterson and Sips equations. In 1 h, 80, 85 and 90% removal was reached for samples PD-1, PD-2 and PD-3, respectively. The sorption kinetics followed the pseudo-second order rate expression, which indicates the chemical interaction of sorbents with Sr(II) ions. The MgHPO4 is the most active component in the sample PD-1, MgNH4PO4·6Н2О along with Ca3(PO4)2 makes a significant contribution to the sorption of Sr(II) onto PD-2, while MgHPO4 and CaCO3 most actively interact with Sr(II) ions in PD-3. The obtained Ca-Mg phosphate had a significantly higher sorption capacity towards Sr(II) than widely-used materials such as functionalized montmorillonite, titanosilicates, tungsten and antimony oxide, graphene oxide, and imprinted polymers.

KW - Ca-Mg phosphate

KW - Isotherms modeling

KW - Sorption

KW - Sorption mechanisms

KW - Sr(II) ions

UR - http://www.scopus.com/inward/record.url?scp=85030871561&partnerID=8YFLogxK

U2 - 10.1016/j.jtice.2017.09.027

DO - 10.1016/j.jtice.2017.09.027

M3 - Article

AN - SCOPUS:85030871561

SN - 1876-1070

VL - 80

SP - 787

EP - 796

JO - Journal of the Taiwan Institute of Chemical Engineers

JF - Journal of the Taiwan Institute of Chemical Engineers

ER -

Effect of phase composition on sorption behavior of Ca-Mg phosphates towards Sr(II) ions in aqueous solution

Abstract

Keywords

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