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) | 1-11 |
| Number of pages | 11 |
| Journal | Desalination and Water Treatment |
| DOIs | |
| Publication status | Accepted/In press - Sep 29 2016 |
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Keywords
- Adsorption
- Bentonite
- Chromium
- Heavy metals
- Ion exchange
- Manganese
- Zinc
ASJC Scopus subject areas
- Water Science and Technology
- Ocean Engineering
- Pollution
Cite this
Equilibrium ion exchange studies of Zn2+, Cr3+, and Mn2+ on natural bentonite. / Stylianou, Marinos A.; Inglezakis, Vassilis J.; Loizidou, Maria D.; Agapiou, Agapios; Itskos, Grigorios.
In: Desalination and Water Treatment, 29.09.2016, p. 1-11.Research output: Contribution to journal › Article
}
TY - JOUR
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 - 2016/9/29
Y1 - 2016/9/29
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
UR - http://www.scopus.com/inward/record.url?scp=84989261748&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84989261748&partnerID=8YFLogxK
U2 - 10.1080/19443994.2016.1235153
DO - 10.1080/19443994.2016.1235153
M3 - Article
AN - SCOPUS:84989261748
SP - 1
EP - 11
JO - Desalination and Water Treatment
JF - Desalination and Water Treatment
SN - 1944-3994
ER -