Synthesis of Fe3O4/polyaniline nanocomposite and its application for nitrate removal from aqueous solutions. Issue 2 (29th April 2013)

• Record Type: Journal Article
• Authors: Katal, Reza; Pourkarimi, Sara; Bahmani, Ehsan; Dehkordi, Hamed Aleebrahim; Ghayyem, Mohhamad Ali; Esfandian, Hussein
• Is Part Of: Journal of vinyl & additive technology. Volume 19:Issue 2(2013:Jun.)
• Page Start: 147
• Page End: 156
• Publication Date: 2013-04-29
• Subjects: Vinyl polymers -- Periodicals; Plastics -- Additives -- Periodicals; 668.4236
• DOI: 10.1002/vnl.21306
• Languages: English
• ISSNs: 1083-5601

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>The aim of this work was to investigate the sorption characteristics of Fe<sub>3</sub>O<sub>4</sub> coated on polyaniline (Fe<sub>3</sub>O<sub>4</sub>/PAn) for the removal of NO<sub>3</sub><sup>−</sup> ions from aqueous solutions. The sorption of NO<sub>3</sub><sup>−</sup> ions by the batch method was carried out. The optimum conditions of sorption were found to be a Fe<sub>3</sub>O<sub>4</sub>/PAn dose of 0.4 g in 100 mL of NO<sub>3</sub><sup>−</sup> solution, a contact time of 10 min, pH and temperature 7 and 40°C, respectively. Temperature had a negative effect on the removal efficiency. Three equations, i.e., Morris–Weber, Lagergren, and pseudo‐second‐order, were tested to track the kinetics of the removal process. The Langmuir, Freundlich, and Dubinin–Radushkevich isotherm models were subjected to sorption data in order to estimate sorption capacity, intensity, and energy. The thermodynamic parameters Δ<italic>H</italic>, Δ<italic>S</italic>, and Δ<italic>G</italic> were evaluated. They showed that the adsorption of NO<sub>3</sub><sup>−</sup> onto Fe<sub>3</sub>O<sub>4</sub>/PAn was feasible, spontaneous, and exothermic under the studied conditions. It can be concluded that Fe<sub>3</sub>O<sub>4</sub>/PAn has potential to remove NO<sub>3</sub><sup>−</sup> ions from aqueous solutions at different concentrations. The system Fe<sub>3</sub>O<sub>4</sub>/Pan was successfully tested for a high removal efficiency of NO<sub>3</sub><sup>−</sup> from urban wastewater. J. VINYL ADDIT. TECHNOL., 19:147–156, 2013. © 2013 Society of Plastics Engineers</p> </abstract>