Preparation and characterization of novel P(HEA/IA) hydrogels for Cd2+ ion removal from aqueous solution
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AuthorsAntić, Katarina M.
Babić, Marija M.
Jovašević Vuković, Jovana J.
Onjia, Antonije E.
Filipovic, Jovanka M
Tomić, Simonida Lj.
Article (Published version)
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Series of novel hydrogels based on 2-hydroxyethyl acrylate (HEA) and itaconic acid (IA), P(HEA/IA) copolymers, were prepared by free radical cross-linking copolymerization and investigated as potential adsorbents for Cd2+ removal from aqueous solution. The hydrogels before and after Cd2+ adsorption were characterized using FTIR, temperature sensitive. In order to evaluate adsorption behavior of samples various factors affecting the Cd2+ uptake behavior, such as: contact time, temperature, pH, ionic strength, adsorbent weight, competitive ions and initial concentration of the metal ions were investigated. Five adsorption isotherms and two kinetic models were studied. The adsorption behavior can be very well described by the pseudo-second order kinetic model and Langmuir isotherm. Multicomponent adsorption studies revealed that adsorption of cadmium depends on the type of metal ions present in the system. Desorption studies showed that hydrogel can be reused three times with only 15% los...s of adsorption capacity. All results indicate that the sample with the highest IA content is the most promising adsorbent for Cd2+ removal.
Keywords:Hydrogel / Cadmium adsorption / Surface topography / Isotherm / Multicomponent adsorption / Reusability
Source:Applied Surface Science, 2015, 338, 178-189
- Elsevier Science Bv, Amsterdam
- Synthesis and characterization of novel functional polymers and polymeric nanocomposites (RS-172062)
- Dynamics of nonlinear physicochemical and biochemical systems with modeling and predicting of their behavior under nonequilibrium conditions (RS-172015)
- The peer-reviewed version: http://cer.ihtm.bg.ac.rs/handle/123456789/2898