Sorption of Charged Organic Dyes from Anionic Hydrogels
Hydrogels are three-dimensional, hydrophilic,
polymeric networks composed of homopolymers or copolymers and
are insoluble in water due to the presence of chemical or physical
cross-links. When hydrogels come in contact with aqueous solutions,
they can effectively sorb and retain the dissolved substances,
depending on the nature of the monomeric units comprising the
hydrogel. For this reason, hydrogels have been proposed in several
studies as water purification agents. At the present work anionic
hydrogels bearing negatively charged –COO- groups were prepared
and investigated. These gels are based on sodium acrylate (ANa),
either homopolymerized (poly(sodiumacrylate), PANa) or
copolymerized (P(DMAM-co-ANa)) with N,N Dimethylacrylamide
(DMAM). The hydrogels were used to extract some model organic
dyes from water. It is found that cationic dyes are strongly sorbed and
retained by the hydrogels, while sorption of anionic dyes was
negligible. In all cases it was found that both maximum sorption
capacity and equilibrium binding constant varied from one dye to the
other depending on the chemical structure of the dye, the presence of
functional chemical groups and the hydrophobic-hydrophilic balance.
Finally, the nonionic hydrogel of the homopolymer poly(N,Ndimethylacrylamide),
PDMAM, was also used for reasons of
comparison.
[1] G. Crini, “Non-Conventional Low-Cost Adsorbents for Dye Removal: A
Review” Bioresource Technol., vol. 97, pp. 1061-1085, June 2006.
[2] G. S. Chauhan, B. Singh, R.K. Sharma, M. Verma, S.C. Jaswal and R.
Sharma, “Use of biopolymers and acrylamide-based hydrogels for
sorption of Cu2+, Fe2+ and Cr6+ ions from their aqueous solutions”,
Desalination, vol 197, pp 75-81, October 2006.
[3] X. Wang, Y.Guo, L. Yang, M. Han, J. Zhao and X. Cheng,
“Nanomaterials as Sorbents to Remove Heavy Metal Ions in Wastewater
Treatment” J. Environ. Anal. Toxicol., 2:154, November 2012.
[4] F. Zhaoa, W. Z. Tang, D. Zhao, Y. Menga, D. Yina and M. Sillanpaa,
“Adsorption kinetics, isotherms and mechanisms of Cd(II), Pb(II),
Co(II) and Ni(II) by a modified magnetic polyacrylamide
microcomposite adsorbent”, Journal of Water Process Engineering, vol.
4, pp. 47-57 December 2014.
[5] O. Hernandez-Ramirez and S. M. Holmes, “Novel and modified
materials for waste water treatment applications” J. Mater. Chem., vol.
18, pp. 2751-2761, February 2008.
[6] V Bekiari and P.Lianos, “Ureasil Gels as Highly Efficient Adsorbent for
Water Purification”, Chem. Mater., vol. 18, pp. 4142-4146, July 2006.
[7] M. Nieto-Suarez, G. Palisano, M.L. Ferrer, M. Conception Gutierrez, S.
Yurdakai, V. Augugliaro, M. Pagliaro and F. Del Monte, “Selfassembled
titania-silica-sepioloite based nanocomposites for water
decontamination” J. Mater. Chem., vol. 19, pp. 2070-2075, May 2009.
[8] I. Thivaios and G. Bokias, “Adsorption of Nile Red by poly(Nisopropylacrylamide)
gels in binary water/tetrahydrofuran mixtures”, J.
Appl. Polym. Sci., vol. 116, pp.1509-1514, May 2010.
[9] C. Zaharia and D Suteu, “Textile Organic Dyes –Characteristics,
Polluting Effects and Separation/Elimination Procedures from Industrial
Effluents – A Critical Overview”, book: ‘Organic Pollutants Ten Years
After Stockholm Convention-Environmental and Analytical Update’,
February 2012. [10] V Vaino, O. Sacco, D. Sannino and P.Ciambelli, “Nanostructured Ndoped
TiO2 coated on glass spheres for the photocatalytic removal of
organic dyes under UV or visible light irradiation”, App. Catal.B, vol.
170-171, pp 153-161, July 2015.
[11] C. Umpuch and B. Jutarat, “Adsorption of Organic Dyes from Aqueous
Solution by Surfactant Modified Corn Straw” International Journal of
Chemical Engineering and Applications, vol. 4, pp. 134-139, June 2013.
[12] S. Ray, A.K. Das and A. Banerjee, “pH-responsive, bolaamphiphilebased
smart metallo-hydrogels as potential dye-adsorbing agents, water
purifier, and vitamin B12 carrier”, Chem. Mater., vol. 19, pp. 1633-1639,
April 2007.
[13] E. Stathatos, P. Lianos and C. Tsakiroglou, “Metachromatic Effects and
Photodegradation of Bacic Blue on Nanocrystalline Titania Films”
Langmuir, vol. 20, pp. 9103-9107, September 2004.
[14] N. Strataki, V. Bekiari, E. Stathatos and P. Lianos, “Metachromatic
Effects and Photodegradation of Bacic Blue on Nanocrystalline Titania
Films” J. Photochem. Photobiol., A, vol. 191, 13-17, September 2007.
[15] V. Bekiari and P. Lianos, “Poly(sodiumacrylate) hydrogels as potential
pH-sensitive sorbents for the removal of model organic and inorganic
pollutants from water”, Global Nest Journal, vol. 12, pp. 262-269,
August 2010.
[16] Y. Xun, Z. Shu-Ping, X. Wei, C. Hong-You, D. Xiao-Dong, L. Xin-Mei,
Y. Zi-Feng, “Aqueous dye adsorption on ordered mesoporous carbons”
J. Coloid Interf. Sci., vol.310, pp.83-89, June 2007.
[1] G. Crini, “Non-Conventional Low-Cost Adsorbents for Dye Removal: A
Review” Bioresource Technol., vol. 97, pp. 1061-1085, June 2006.
[2] G. S. Chauhan, B. Singh, R.K. Sharma, M. Verma, S.C. Jaswal and R.
Sharma, “Use of biopolymers and acrylamide-based hydrogels for
sorption of Cu2+, Fe2+ and Cr6+ ions from their aqueous solutions”,
Desalination, vol 197, pp 75-81, October 2006.
[3] X. Wang, Y.Guo, L. Yang, M. Han, J. Zhao and X. Cheng,
“Nanomaterials as Sorbents to Remove Heavy Metal Ions in Wastewater
Treatment” J. Environ. Anal. Toxicol., 2:154, November 2012.
[4] F. Zhaoa, W. Z. Tang, D. Zhao, Y. Menga, D. Yina and M. Sillanpaa,
“Adsorption kinetics, isotherms and mechanisms of Cd(II), Pb(II),
Co(II) and Ni(II) by a modified magnetic polyacrylamide
microcomposite adsorbent”, Journal of Water Process Engineering, vol.
4, pp. 47-57 December 2014.
[5] O. Hernandez-Ramirez and S. M. Holmes, “Novel and modified
materials for waste water treatment applications” J. Mater. Chem., vol.
18, pp. 2751-2761, February 2008.
[6] V Bekiari and P.Lianos, “Ureasil Gels as Highly Efficient Adsorbent for
Water Purification”, Chem. Mater., vol. 18, pp. 4142-4146, July 2006.
[7] M. Nieto-Suarez, G. Palisano, M.L. Ferrer, M. Conception Gutierrez, S.
Yurdakai, V. Augugliaro, M. Pagliaro and F. Del Monte, “Selfassembled
titania-silica-sepioloite based nanocomposites for water
decontamination” J. Mater. Chem., vol. 19, pp. 2070-2075, May 2009.
[8] I. Thivaios and G. Bokias, “Adsorption of Nile Red by poly(Nisopropylacrylamide)
gels in binary water/tetrahydrofuran mixtures”, J.
Appl. Polym. Sci., vol. 116, pp.1509-1514, May 2010.
[9] C. Zaharia and D Suteu, “Textile Organic Dyes –Characteristics,
Polluting Effects and Separation/Elimination Procedures from Industrial
Effluents – A Critical Overview”, book: ‘Organic Pollutants Ten Years
After Stockholm Convention-Environmental and Analytical Update’,
February 2012. [10] V Vaino, O. Sacco, D. Sannino and P.Ciambelli, “Nanostructured Ndoped
TiO2 coated on glass spheres for the photocatalytic removal of
organic dyes under UV or visible light irradiation”, App. Catal.B, vol.
170-171, pp 153-161, July 2015.
[11] C. Umpuch and B. Jutarat, “Adsorption of Organic Dyes from Aqueous
Solution by Surfactant Modified Corn Straw” International Journal of
Chemical Engineering and Applications, vol. 4, pp. 134-139, June 2013.
[12] S. Ray, A.K. Das and A. Banerjee, “pH-responsive, bolaamphiphilebased
smart metallo-hydrogels as potential dye-adsorbing agents, water
purifier, and vitamin B12 carrier”, Chem. Mater., vol. 19, pp. 1633-1639,
April 2007.
[13] E. Stathatos, P. Lianos and C. Tsakiroglou, “Metachromatic Effects and
Photodegradation of Bacic Blue on Nanocrystalline Titania Films”
Langmuir, vol. 20, pp. 9103-9107, September 2004.
[14] N. Strataki, V. Bekiari, E. Stathatos and P. Lianos, “Metachromatic
Effects and Photodegradation of Bacic Blue on Nanocrystalline Titania
Films” J. Photochem. Photobiol., A, vol. 191, 13-17, September 2007.
[15] V. Bekiari and P. Lianos, “Poly(sodiumacrylate) hydrogels as potential
pH-sensitive sorbents for the removal of model organic and inorganic
pollutants from water”, Global Nest Journal, vol. 12, pp. 262-269,
August 2010.
[16] Y. Xun, Z. Shu-Ping, X. Wei, C. Hong-You, D. Xiao-Dong, L. Xin-Mei,
Y. Zi-Feng, “Aqueous dye adsorption on ordered mesoporous carbons”
J. Coloid Interf. Sci., vol.310, pp.83-89, June 2007.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:71252", author = "Georgios Linardatos and Miltiadis Zamparas and Vlasoula Bekiari and Georgios Bokias and Georgios Hotos", title = "Sorption of Charged Organic Dyes from Anionic Hydrogels", abstract = "Hydrogels are three-dimensional, hydrophilic,
polymeric networks composed of homopolymers or copolymers and
are insoluble in water due to the presence of chemical or physical
cross-links. When hydrogels come in contact with aqueous solutions,
they can effectively sorb and retain the dissolved substances,
depending on the nature of the monomeric units comprising the
hydrogel. For this reason, hydrogels have been proposed in several
studies as water purification agents. At the present work anionic
hydrogels bearing negatively charged –COO- groups were prepared
and investigated. These gels are based on sodium acrylate (ANa),
either homopolymerized (poly(sodiumacrylate), PANa) or
copolymerized (P(DMAM-co-ANa)) with N,N Dimethylacrylamide
(DMAM). The hydrogels were used to extract some model organic
dyes from water. It is found that cationic dyes are strongly sorbed and
retained by the hydrogels, while sorption of anionic dyes was
negligible. In all cases it was found that both maximum sorption
capacity and equilibrium binding constant varied from one dye to the
other depending on the chemical structure of the dye, the presence of
functional chemical groups and the hydrophobic-hydrophilic balance.
Finally, the nonionic hydrogel of the homopolymer poly(N,Ndimethylacrylamide),
PDMAM, was also used for reasons of
comparison.", keywords = "Anionic organic hydrogels, sorption, organic dyes,
water purification agents.", volume = "9", number = "11", pages = "1293-4", }
