Abstract
This work investigates a new starch-based hydrogel nanocomposite made from starch and poly vinyl alcohol blend as polymeric matrix and fumarate-alumoxane (Fum-A) and maleic anhydride (MA) as cross-linking agents, for its use in NH4+ removal from aqueous solutions.The adsorption performance of the hydrogel nanocomposite and also, nanocomposite's maximum adsorption capacity for ammonium adsorption via isotherm studies are examined. Box–Behnken experimental design is used to evaluate performance of hydrogel nanocomposite in the adsorption process. A mechanism was proposed for the chemisorption of ammonia. The water adsorption degree of cross-linked hydrogel nanocomposites decreased with increasing the amount of nanoparticles. The swelling degree of hydrogel nanocomposite (3.6 wt%) was improved about 1.5 units as compared with the hydrogel alone. The maximum removal efficiency (R%) of ammonium ion by hydrogel nanocomposite was 97.99%. The Langmuir isotherm model agrees well with the experimental data and its correlation coefficient value was close to adjust the correlation coefficient value, as compared with Temkin and Freundlich isotherm models. The maximum capacity of the model being 19.01 mg/g was improved compared with the maximum capacity of the Langmuir isotherm (7.43 mg/g).
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of the Taiwan Institute of Chemical Engineers
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
