TY - JOUR
T1 - Lignin-based hydrogels with “super-swelling” capacities for dye removal
AU - Domínguez-Robles, Juan
AU - Peresin, María Soledad
AU - Tamminen, Tarja
AU - Rodríguez, Alejandro
AU - Larrañeta, Eneko
AU - Jääskeläinen, Anna Stiina
N1 - Funding Information:
The authors wish to acknowledge M.Sc. Harri Setälä, M.Sc. Kari Kammiovirta, M.Sc. Atte Mikkelson, M.Sc. Pia Willberg-Keyriläinen and M.Sc. Martina Lille for skilful expertise in lignin analytics and polymers knowledge. The authors would also like to thank Spain's DGICyT, MICINN for funding part of this research within the framework of the project CTQ2013-46804-C2-2-R .
Publisher Copyright:
© 2018 Elsevier B.V.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2018/8/1
Y1 - 2018/8/1
N2 - Lignin is a complex natural polymer and it is one of the main constituent of the lignocellulosic biomass. Moreover, it is a bio-renewable material and it is available in large amounts as by-product from the forest industry. Lignin-based hydrogels with high swelling capabilities were prepared by crosslinking poly (methyl vinyl ether co-maleic acid) and different technical lignins in ammonium and sodium hydroxide solutions. The produced hydrogels showed a wide range of water absorption capacities varying from 13 to 130 g of water per 1 g of sample. It was observed that the higher the water uptake the poorer mechanical performance, as evaluated in terms of storage and loss modulus (G′ and G″ respectively) of the materials. Methylene blue (MB) was used as a model dye to evaluate the adsorption and release capabilities of the lignin hydrogels. Results suggested that these hydrogels showed a high MB removal efficiency, which ranged from 12 to 96%. On the contrary, the percentages of MB released depended on the negative surface charge of the hydrogels, showing values which ranged from 0.06 to 0.35%. Thus, these materials have potential to be used as adsorbents for the removal of organic dyes from waste water.
AB - Lignin is a complex natural polymer and it is one of the main constituent of the lignocellulosic biomass. Moreover, it is a bio-renewable material and it is available in large amounts as by-product from the forest industry. Lignin-based hydrogels with high swelling capabilities were prepared by crosslinking poly (methyl vinyl ether co-maleic acid) and different technical lignins in ammonium and sodium hydroxide solutions. The produced hydrogels showed a wide range of water absorption capacities varying from 13 to 130 g of water per 1 g of sample. It was observed that the higher the water uptake the poorer mechanical performance, as evaluated in terms of storage and loss modulus (G′ and G″ respectively) of the materials. Methylene blue (MB) was used as a model dye to evaluate the adsorption and release capabilities of the lignin hydrogels. Results suggested that these hydrogels showed a high MB removal efficiency, which ranged from 12 to 96%. On the contrary, the percentages of MB released depended on the negative surface charge of the hydrogels, showing values which ranged from 0.06 to 0.35%. Thus, these materials have potential to be used as adsorbents for the removal of organic dyes from waste water.
KW - Dye removal
KW - Lignin hydrogels
KW - Water absorption
UR - http://www.scopus.com/inward/record.url?scp=85046784783&partnerID=8YFLogxK
U2 - 10.1016/j.ijbiomac.2018.04.044
DO - 10.1016/j.ijbiomac.2018.04.044
M3 - Article
AN - SCOPUS:85046784783
SN - 0141-8130
VL - 115
SP - 1249
EP - 1259
JO - International Journal of Biological Macromolecules
JF - International Journal of Biological Macromolecules
ER -
