We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Preparation and evaluation of hydrogel composites based on starch- g -PNaMA/eggshell particles as dye biosorbent.
- Authors
Bakhshi, Hadi; Darvishi, Atefeh
- Abstract
In this study, eggshell (ES) particles as an available and low-cost waste material were used for preparing hydrogel composites as dye biosorbents. For this purpose, hydrogel composites were prepared through free-radical graft copolymerization of wheat starch and sodium methacrylate (NaMA) in the presence of different contents of ES particles with various size ranges. FTIR spectroscopy confirmed graft copolymerization of NaMA moieties onto starch backbone besides the combination of ES particles with the starch-g-PNaMA matrix. The gel content values were high (>99%), which showed proper graft efficiency for hydrogel composites. Incorporation of ES particles into hydrogel matrix resulted in faster water absorption at initial stage and lower equilibrium water absorption capacity. Addition of 60% ES particles into starch-g-PNaMA provided a cost-effective adsorbent with similar CV adsorption capacity compared to unfilled hydrogel, while MB removal was slightly decreased. The dye adsorption by hydrogel composites followed the pseudo-second-order kinetics, indicating that chemical sorption is the rate-limiting step.
- Subjects
HYDROGELS; EGGSHELLS; COMPOSITE materials; DYEING machines; ADSORPTION kinetics; WHEAT starch
- Publication
Desalination & Water Treatment, 2016, Vol 57, Issue 39, p18144
- ISSN
1944-3994
- Publication type
Article
- DOI
10.1080/19443994.2015.1087344