Abstract
In this study, Acrylamide (AAM), Itaconic acid (IA) and nano TiO2 were copolymerized using gamma irradiation with 60Co γ-rays at a dose of 25 KGy to form poly (acrylamide-co-Itaconic acid/TiO2) (P(AAM-co-IA/TiO2)). Different compositions of P(AAM-co-IA/TiO2) nanocomposites are prepared and examined for Ce(III) sorption. The optimum composition is C6P(AAM-co-IA/TiO2); 61.54 AAM: 30.77 IA: 2.56 TiO2: 5.13 DAM with sorption efficiency at 298 K, pH 6 after 60 min is 80% for initial Ce(III) concentration 200 mgL–1. C6P(AAM-co-IA/TiO2) is characterized by different physicochemical techniques. The optimum pH for the sorption process at 298 K is 6 and the equilibrium attained after 60 min. Different kinetics and isothermal models is applied. The monolayer adsorption capacity is 76.04 mg g–1 at 298 K. The sorption reaction follows a pseudo - 2nd - order kinetic mechanism. The change of Gibbs free energy is – 4.78 kJ/mol at 298 K and change in enthalpy is 60.874 kJ/mole, i.e., the process is spontaneous and endothermic.
Highlights
In the recent years, rare earth elements (REEs) have had important applications in industry as aerospace, electronic information and atomic energy [1,2]
To synthesize the P(AAM-co-Itaconic acid (IA)/TiO2) nanocomposites, different molar ratios of AAM and IA were copolymerized with nano TiO2 as shown in Table 1 in the presence of methylene bis acrylamide (DAM) as a cross-linker
The optimum conditions for the sorption process maintained by variation of the reaction parameters. i.e. pH (2-7), contact time (15-120 minutes), initial concentration (50-500 mgL-1) and sorbent weight (m). (0.05) g of the sorbent contacted with mL of the sorbate solution and after sorption time; samples were filtered and separated from the solution
Summary
Rare earth elements (REEs) have had important applications in industry as aerospace, electronic information and atomic energy [1,2]. Organic polymers as poly Acrylic acid, poly Malic acid, poly acrylamide and poly itaconic acid are well known for their uniformity and chemical stability. These materials have some drawbacks such as non‐adequate mechanical strength and flexibility. Introduction of nano inorganic material as metal oxides to organic monomers to develop polymericinorganic nanocomposite greatly enhances its mechanical strength, toughness, glass transition temperature, optical and tensile strength, etc. Our study aims to prepare a novel nanocomposite for Ce(III) sorption from monazite leachate. The prepared nanocomposite used as sorbent with optimum parameters for Ce(III) from monazite leachate
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