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Synthesis of Fe 3 O 4 /polyaniline nanocomposite and its application for nitrate removal from aqueous solutions
Author(s) -
Katal Reza,
Pourkarimi Sara,
Bahmani Ehsan,
Dehkordi Hamed Aleebrahim,
Ghayyem Mohhamad Ali,
Esfandian Hussein
Publication year - 2013
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.21306
Subject(s) - sorption , aqueous solution , polyaniline , freundlich equation , adsorption , langmuir , materials science , nanocomposite , nuclear chemistry , chemical engineering , chemistry , polymer , organic chemistry , composite material , engineering , polymerization
The aim of this work was to investigate the sorption characteristics of Fe 3 O 4 coated on polyaniline (Fe 3 O 4 /PAn) for the removal of NO 3 − ions from aqueous solutions. The sorption of NO 3 − ions by the batch method was carried out. The optimum conditions of sorption were found to be a Fe 3 O 4 /PAn dose of 0.4 g in 100 mL of NO 3 − 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 H , Δ S , and Δ G were evaluated. They showed that the adsorption of NO 3 − onto Fe 3 O 4 /PAn was feasible, spontaneous, and exothermic under the studied conditions. It can be concluded that Fe 3 O 4 /PAn has potential to remove NO 3 − ions from aqueous solutions at different concentrations. The system Fe 3 O 4 /Pan was successfully tested for a high removal efficiency of NO 3 − from urban wastewater. J. VINYL ADDIT. TECHNOL., 19:147–156, 2013. © 2013 Society of Plastics Engineers