Equilibrium ion exchange studies of Zn2+, Cr3+, and Mn2+ on natural bentonite

Marinos A. Stylianou; Vassilis J. Inglezakis; Maria D. Loizidou; Agapios Agapiou; Grigorios Itskos

doi:10.1080/19443994.2016.1235153

Equilibrium ion exchange studies of Zn²⁺, Cr³⁺, and Mn²⁺ on natural bentonite

Marinos A. Stylianou, Vassilis J. Inglezakis, Maria D. Loizidou, Agapios Agapiou, Grigorios Itskos

Chemical And Process Engineering

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

9 Citations (Scopus)

Abstract

Bentonite is a clay mineral often used in ion exchange processes due to its high ion exchange capacity. In the present study, a commercially available in Greece market bentonite was obtained and characterized by XRD, XRF, FTIR, BET, and TG/DTA analysis. Monmorillonite was the main component of bentonite sample (>80%). Ion exchange equilibria of Zn²⁺, Cr³⁺, and Mn²⁺ on bentonite was examined by use of batch equilibrium isotherms, distribution coefficients, and maximum exchange levels (MELs) under the same normality for all metals (0.01 N) at 25 ± 2°C. The equilibrium isotherms for the metals studied exhibit a favorable-type isotherm. Selectivity series deduced from equilibrium isotherms are Cr³⁺ > Zn²⁺ > Mn²⁺, and the same occurs for MELs. The Langmuir and Freundlich models were applied and fitted the equilibrium data for the metal ion uptake. A detailed literature review on heavy metals-bentonite equilibrium is provided.

Original language	English
Pages (from-to)	27853-27863
Number of pages	11
Journal	Desalination and Water Treatment
Volume	57
Issue number	57
Early online date	30 Sept 2016
DOIs	https://doi.org/10.1080/19443994.2016.1235153
Publication status	Published - 7 Dec 2016

Keywords

adsorption
bentonite
chromium
heavy metals
ion exchange
manganese
zinc

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10.1080/19443994.2016.1235153

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title = "Equilibrium ion exchange studies of Zn2+, Cr3+, and Mn2+ on natural bentonite",

abstract = "Bentonite is a clay mineral often used in ion exchange processes due to its high ion exchange capacity. In the present study, a commercially available in Greece market bentonite was obtained and characterized by XRD, XRF, FTIR, BET, and TG/DTA analysis. Monmorillonite was the main component of bentonite sample (>80%). Ion exchange equilibria of Zn2+, Cr3+, and Mn2+ on bentonite was examined by use of batch equilibrium isotherms, distribution coefficients, and maximum exchange levels (MELs) under the same normality for all metals (0.01 N) at 25 ± 2°C. The equilibrium isotherms for the metals studied exhibit a favorable-type isotherm. Selectivity series deduced from equilibrium isotherms are Cr3+ > Zn2+ > Mn2+, and the same occurs for MELs. The Langmuir and Freundlich models were applied and fitted the equilibrium data for the metal ion uptake. A detailed literature review on heavy metals-bentonite equilibrium is provided.",

keywords = "adsorption, bentonite, chromium, heavy metals, ion exchange, manganese, zinc",

author = "Stylianou, {Marinos A.} and Inglezakis, {Vassilis J.} and Loizidou, {Maria D.} and Agapios Agapiou and Grigorios Itskos",

year = "2016",

month = dec,

day = "7",

doi = "10.1080/19443994.2016.1235153",

language = "English",

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T1 - Equilibrium ion exchange studies of Zn2+, Cr3+, and Mn2+ on natural bentonite

AU - Stylianou, Marinos A.

AU - Inglezakis, Vassilis J.

AU - Loizidou, Maria D.

AU - Agapiou, Agapios

AU - Itskos, Grigorios

PY - 2016/12/7

Y1 - 2016/12/7

N2 - Bentonite is a clay mineral often used in ion exchange processes due to its high ion exchange capacity. In the present study, a commercially available in Greece market bentonite was obtained and characterized by XRD, XRF, FTIR, BET, and TG/DTA analysis. Monmorillonite was the main component of bentonite sample (>80%). Ion exchange equilibria of Zn2+, Cr3+, and Mn2+ on bentonite was examined by use of batch equilibrium isotherms, distribution coefficients, and maximum exchange levels (MELs) under the same normality for all metals (0.01 N) at 25 ± 2°C. The equilibrium isotherms for the metals studied exhibit a favorable-type isotherm. Selectivity series deduced from equilibrium isotherms are Cr3+ > Zn2+ > Mn2+, and the same occurs for MELs. The Langmuir and Freundlich models were applied and fitted the equilibrium data for the metal ion uptake. A detailed literature review on heavy metals-bentonite equilibrium is provided.

AB - Bentonite is a clay mineral often used in ion exchange processes due to its high ion exchange capacity. In the present study, a commercially available in Greece market bentonite was obtained and characterized by XRD, XRF, FTIR, BET, and TG/DTA analysis. Monmorillonite was the main component of bentonite sample (>80%). Ion exchange equilibria of Zn2+, Cr3+, and Mn2+ on bentonite was examined by use of batch equilibrium isotherms, distribution coefficients, and maximum exchange levels (MELs) under the same normality for all metals (0.01 N) at 25 ± 2°C. The equilibrium isotherms for the metals studied exhibit a favorable-type isotherm. Selectivity series deduced from equilibrium isotherms are Cr3+ > Zn2+ > Mn2+, and the same occurs for MELs. The Langmuir and Freundlich models were applied and fitted the equilibrium data for the metal ion uptake. A detailed literature review on heavy metals-bentonite equilibrium is provided.

KW - adsorption

KW - bentonite

KW - chromium

KW - heavy metals

KW - ion exchange

KW - manganese

KW - zinc

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U2 - 10.1080/19443994.2016.1235153

DO - 10.1080/19443994.2016.1235153

M3 - Article

AN - SCOPUS:84989261748

VL - 57

SP - 27853

EP - 27863

IS - 57

ER -

Equilibrium ion exchange studies of Zn²⁺, Cr³⁺, and Mn²⁺ on natural bentonite

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Keywords

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