Effective Adsorption of Heavy Metal Cations by Superparamagnetic Poly(aniline‐co‐m‐phenylenediamine)@Fe₃O₄ Nanocomposite

Abstract

ABSTRACT:The development of simple methods for the removal of heavy metal cations from water samples is a relevant field of research. For this purpose, poly(aniline-co-m-phenylenediamine) (PAMpDA) was synthesized via radical oxidation polymerization of aniline with m-phenylenediamine. Then, superparamagnetic poly(aniline-co-m-phenylenediamine)@Fe 3 O 4 (PAMpDA@Fe 3 O 4 ) nanocomposite was fabricated from PAMpDA, Fe(II), and Fe(III) salts via the in situ coprecipitation technique. The products were characterized in terms of chemical structure, morphology, thermal and magnetic properties by Fourier transform infrared, X-ray diffraction, scanning electron microscopy, thermal gravimetric analysis, and vibrating sample magnetometer, respectively. The capability of PAMpDA and its nanocomposite for the removal of Pb(II), Cd(II), and Co(II) ions was investigated at various contact times, absorbent dosages, pH, and initial concentrations. The experimental data for Co(II) cation with the highest sorption were analyzed by two isotherms and kinetic equations. In addition, the electrical conductivity of PAMpDA and PAMpDA@Fe 3 O 4 nanocomposite was examined after sorption of the heavy metal ions. C

Synthesis of sewage sludge‐based carbon/TiO2/ZnO nanocomposite adsorbent for the removal of Ni(II), Cu(II), and chemical oxygen demands from aqueous solutions and industrial wastewater

“…Among them, the adsorption process as an effective economical method has been reported for the removal of heavy metal ions and COD from aqueous solutions (Inyang et al, 2016;Jain et al, 2016). The various adsorbents in the hydrogel/nanogel (Lakouraj, Hasanzadeh, & Zare, 2014), nanofiber (Bahmani et al, 2019), nanoparticles (Mirzababaei, Taghizadeh, & Alizadeh, 2016;Zare, Lakouraj, & Kasirian, 2018), nanocomposites (Fallah, Isfahani, & Tajbakhsh, 2019;Lakouraj, Mojerlou, & Zare, 2014;Zare, Lakouraj, & Ramezani, 2015Zare, Motahari, & Sillanpää, 2018), etc., have been applied for adsorption of metal ions from aqueous solutions. However, the use of these adsorbents due to their high cost is limited.…”

Innovative magnetic tri-layered nanocomposites based on polyxanthone triazole, polypyrrole and iron oxide: synthesis, characterization and investigation of the biological activities

“…In our previous work, PPy and polymers based on xanthone showed good antibacterial activity. 13 The total mass loss of Fe 3 O 4 up to 650 C was 5%. The results show that the antibacterial activities of the composite materials and the standard antibiotics are comparable to each other and that there is a synergic effect in the antibacterial activities of composites 1 and 2, to give greater inhibition than PPy, PXT and Fe 3 O 4 .…”

“…Thus the deactivation of free radicals by synthetic materials is important for their biomedical applications. 13,17 PXT showed antioxidant activity of up to 70% which seems to be related to the presence of amidic N-H in the backbone of the polymers and the xanthone scaffold. 13,17,53 In this research the radical inhibition properties of Fe 3 O 4 , PPy, PXT, PXT@Fe 3 O 4 and PPy@PXT@Fe 3 O 4 samples were examined using the DPPH free radical at time intervals between 10-120 min, as is summarized in Table 1.…”

“…13,17,53 In this research the radical inhibition properties of Fe 3 O 4 , PPy, PXT, PXT@Fe 3 O 4 and PPy@PXT@Fe 3 O 4 samples were examined using the DPPH free radical at time intervals between 10-120 min, as is summarized in Table 1. Thus the deactivation of free radicals by synthetic materials is important for their biomedical applications.…”

“…The magnetic Fe 3 O 4 nanoparticles were synthesized via a coprecipitation method according to our previous work 13. Briey, 2.91 g of FeCl 3 $6H 2 O and 1.07 g of FeCl 2 $4H 2 O were dissolved into 100 mL of distilled water.…”