Abstract
In this work, amphoteric cryogels based on N,N-dimethyl acrylamide, methacrylic acid and allylamine, crosslinked by N,N-methylenebisacrylamide were synthesized by free-radical polymerization in cryo-conditions. The synthesized cryogels were used for the removal of cadmium ions from aqueous solutions under different pH values. The chemical structure was studied by FTIR, porosity by nitrogen adsorption and morphology by scanning electron microscopy and texture analyzer. The amphoteric properties of cryogels were studied by zeta potential measurements. Adsorption tests revealed that cryogels exhibit 3 times higher adsorption capacity at pH 6.0 than at pH 4.0. The maximum adsorption capacity of the amphoteric cryogels for Cd2+ was 113 mg/g, at pH 6.0 and initial Cd2+ concentration 100 ppm. The results suggest that the predominant removal mechanism is ion exchange between sodium, which initially presents in the structure of the cryogel, and cadmium from the aqueous phase. Recovery studies suggested that the cryogels used can be regenerated and efficiently reused.
| Original language | English |
|---|---|
| Title of host publication | Key Engineering Materials VIII |
| Editors | Chobin Makabe, Alexander M. Korsunsky, Emma Wang |
| Publisher | Trans Tech Publications |
| Pages | 376-382 |
| Number of pages | 7 |
| ISBN (Print) | 9783035713046 |
| DOIs | |
| Publication status | Published - Jan 1 2018 |
| Event | 8th International Conference on Key Engineering Materials, ICKEM 2018 - Osaka, Japan Duration: Mar 16 2018 → Mar 18 2018 |
Publication series
| Name | Key Engineering Materials |
|---|---|
| Volume | 775 KEM |
| ISSN (Print) | 1013-9826 |
Conference
| Conference | 8th International Conference on Key Engineering Materials, ICKEM 2018 |
|---|---|
| Country | Japan |
| City | Osaka |
| Period | 3/16/18 → 3/18/18 |
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Keywords
- Adsorption
- Cadmium removal
- Cryogel
- Ion-exchange
ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering
Cite this
Novel amphoteric cryogels for Cd2+ ions removal from aqueous solutions. / Baimenov, Alzhan; Berillo, Dmitriy; Abylgazina, Leila; Poulopoulos, Stavros G.; Inglezakis, Vassilis J.
Key Engineering Materials VIII. ed. / Chobin Makabe; Alexander M. Korsunsky; Emma Wang. Trans Tech Publications, 2018. p. 376-382 (Key Engineering Materials; Vol. 775 KEM).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Novel amphoteric cryogels for Cd2+ ions removal from aqueous solutions
AU - Baimenov, Alzhan
AU - Berillo, Dmitriy
AU - Abylgazina, Leila
AU - Poulopoulos, Stavros G.
AU - Inglezakis, Vassilis J.
PY - 2018/1/1
Y1 - 2018/1/1
N2 - In this work, amphoteric cryogels based on N,N-dimethyl acrylamide, methacrylic acid and allylamine, crosslinked by N,N-methylenebisacrylamide were synthesized by free-radical polymerization in cryo-conditions. The synthesized cryogels were used for the removal of cadmium ions from aqueous solutions under different pH values. The chemical structure was studied by FTIR, porosity by nitrogen adsorption and morphology by scanning electron microscopy and texture analyzer. The amphoteric properties of cryogels were studied by zeta potential measurements. Adsorption tests revealed that cryogels exhibit 3 times higher adsorption capacity at pH 6.0 than at pH 4.0. The maximum adsorption capacity of the amphoteric cryogels for Cd2+ was 113 mg/g, at pH 6.0 and initial Cd2+ concentration 100 ppm. The results suggest that the predominant removal mechanism is ion exchange between sodium, which initially presents in the structure of the cryogel, and cadmium from the aqueous phase. Recovery studies suggested that the cryogels used can be regenerated and efficiently reused.
AB - In this work, amphoteric cryogels based on N,N-dimethyl acrylamide, methacrylic acid and allylamine, crosslinked by N,N-methylenebisacrylamide were synthesized by free-radical polymerization in cryo-conditions. The synthesized cryogels were used for the removal of cadmium ions from aqueous solutions under different pH values. The chemical structure was studied by FTIR, porosity by nitrogen adsorption and morphology by scanning electron microscopy and texture analyzer. The amphoteric properties of cryogels were studied by zeta potential measurements. Adsorption tests revealed that cryogels exhibit 3 times higher adsorption capacity at pH 6.0 than at pH 4.0. The maximum adsorption capacity of the amphoteric cryogels for Cd2+ was 113 mg/g, at pH 6.0 and initial Cd2+ concentration 100 ppm. The results suggest that the predominant removal mechanism is ion exchange between sodium, which initially presents in the structure of the cryogel, and cadmium from the aqueous phase. Recovery studies suggested that the cryogels used can be regenerated and efficiently reused.
KW - Adsorption
KW - Cadmium removal
KW - Cryogel
KW - Ion-exchange
UR - http://www.scopus.com/inward/record.url?scp=85053212256&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85053212256&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/KEM.775.376
DO - 10.4028/www.scientific.net/KEM.775.376
M3 - Conference contribution
SN - 9783035713046
T3 - Key Engineering Materials
SP - 376
EP - 382
BT - Key Engineering Materials VIII
A2 - Makabe, Chobin
A2 - Korsunsky, Alexander M.
A2 - Wang, Emma
PB - Trans Tech Publications
ER -