Adsorption Properties for Superabsorbent of Inverse Suspension Polymerization Poly(acrylate-Co-Acrylamide)

Abstract:

Superabsorbent polymers are lightly crosslinked, hydrophilic polymer network having many functional groups. The adsorption properties in heavy metal ion solutions using poly(acrylate-co-acrylamide)(PAAM) are investigated. It is found that PAAM has a high uptake to heavy metal ions, and that the adsorption of heavy metal ions is greatly influenced by pH and the initial solution concentrations. The biggest and the smallest amount of adsorption are Cu²⁺ and Cr³⁺ in CuCl₂ and CrCl₃ solution, respectively. It was feasible for selective adsorption of the metal ions in the solution onto PAAM hydrogel by controlling the pH values of the mixing solution for CuCl₂, FeCl₃, CrCl_3. Langmiur equatiom can satisfactorily fit for the adsorption of Cu²⁺ while not fit for that of Fe³⁺ and Cr³⁺.

• Periodical: Advanced Materials Research (Volumes 239-242)
• Pages: 851-854
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.239-242.851
• Online since: May 2011
• Authors: Jian Jun Xie, Na Li, Kai Huang, Xin Qiang Han
• Keywords: Adsorption, Heavy Metal Ion, Poly(acrylate-Co-Acrylamide), Superabsorbent

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