Journal
JOURNAL OF POLYMER RESEARCH
Volume 20, Issue 3, Pages -Publisher
SPRINGER
DOI: 10.1007/s10965-013-0101-0
Keywords
Sodium alginate; Granular hydrogel; In situ formation; Adsorption; Heavy metals
Categories
Funding
- National Natural Science Foundation of China [51003112, 21107116]
- Science and Technology Support Project of Jiangsu Provincial Sci. & Tech. Department [BY2010012]
Ask authors/readers for more resources
Granular alginate-based hydrogels were prepared in situ in an aqueous solution via grafting and crosslinking reactions among sodium alginate (SA), acrylic acid (AA), polyvinylpyrrolidone (PVP), and gelatin (GE). Fourier transform infrared spectra, elemental analysis, and scanning electrical microscopy revealed that AA monomers were grafted onto an SA backbone, and that PVP and GE were present in the hydrogel network as linear interpenetrating components. The grafting polymerization and crosslinking reaction between only SA and AA yielded a bulk gel, but the introduction of PVP and GE into the reaction mixture led to the formation of granular products. Electrostatic and hydrogen-bonding interactions among SA, PAA, PVP, and GE were the main driving forces for the formation of granular products. The adsorption isotherms and adsorption kinetics were evaluated for the adsorption of model heavy-metal ions on one of the hydrogels. The results indicated that the hydrogel has satisfactory adsorption capacities (3.028 mmol/g, Ni2+; 3.146 mmol/g, Cu2+; 2.911 mmol/g, Zn2+; 2.862 mmol/g, Cd2+), adsorption rates, and recovery capacities for the target metal ions. In addition, competitive adsorption results suggested that the hydrogel has a stronger affinity for Cu2+ ion than for the other ions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available