Eggshell (ES) particles as an available and low-cost waste material were utilized to prepare novel hydrogel composites for dye adsorbing application. For this purpose, solution polymerization of sodium methacrylate was carried out in the presence of ES particles with various size ranges. Results showed that incorporation of ES particles resulted in heterogeneous pores and cavities in the structure of the poly(sodium methacrylate) (PNaMA) matrix. Hydrogel composites with lower content (20 wt%) and smaller size (<75 μm) of ES particles presented higher water absorption capacity. The equilibrium water absorption values in distilled water were higher than phosphate buffered saline medium. ES particles showed low methylene blue (MB) and crystal violet (CV) adsorption capacities due to electrostatic repulsion of the positively charged species on the surface of ES particles and dye molecules. In contrast, hydrogel composites depicted fast and considerable dye adsorbability. The combination of 60 wt% ES particles within PNaMA provided a cost-effective adsorbent with similar CV adsorption capacity compared with the unfilled matrix, while MB removal was slightly decreased. The dye adsorption by either ES particles or hydrogel composites followed the pseudo-second-order kinetics, indicating that chemical sorption is the rate-limiting step for both of them.
Skip Nav Destination
Article navigation
Research Article|
September 26 2016
Poly(sodium methacrylate)/eggshell particles hydrogel composites as dye sorbent
Atefeh Darvishi;
Atefeh Darvishi
1Young Researcher Club, Islamic Azad University, Karaj Branch, Karaj, Iran
Search for other works by this author on:
Hadi Bakhshi
2Department of Chemical and Petroleum Engineering, Sharif University of Technology, P.O. Box 11365-11155, Tehran, Iran
E-mail: [email protected]; [email protected]
Search for other works by this author on:
Water Sci Technol (2016) 74 (12): 2807–2818.
Article history
Received:
April 15 2016
Accepted:
September 12 2016
Citation
Atefeh Darvishi, Hadi Bakhshi; Poly(sodium methacrylate)/eggshell particles hydrogel composites as dye sorbent. Water Sci Technol 20 December 2016; 74 (12): 2807–2818. doi: https://doi.org/10.2166/wst.2016.453
Download citation file:
Sign in
Don't already have an account? Register
Client Account
You could not be signed in. Please check your email address / username and password and try again.
Could not validate captcha. Please try again.
eBook
Pay-Per-View Access
$38.00