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- W2473253232 endingPage "691" @default.
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- W2473253232 abstract "Two novel nanocomposites have been designed and synthesized using simple and green functionalization of nanosilica sorbent with nanopolyaniline and crosslinked nanopolyaniline, [Sil-Phy-NPANI] and [Sil-Phy-CrossNPANI]. The images of scanning electron microscopy (SEM) and high resolution transmission electron microscope (HR-TEM) confirmed the immobilization process and particle size in the range of 7.14–23.91 nm. The two novel nano-structured silica composites have been further confirmed and evaluated by determination of surface area, Fourier transform-infrared (FT-IR) study and thermal gravimetric analysis (TGA). The sorption characteristics of [Sil-Phy-NPANI] and [Sil-Phy-CrossNPANI] versus nanosilica were compared toward Cu(II), Cd(II), Hg(II) and Pb(II) ions and investigated by the batch technique in presence of different pH values, contact times, composite dosages, initial metal ion concentrations and interfering ions. The optimum sorption conditions of these metal ions were identified in pH 6.0 or 7.0 as a result of complexation or ion exchange of the metal ions by surface amine and/or hydroxyl groups. The highest metal capacity values of Cu(II), Pb(II), Hg(II) and Cd(II) were characterized in the ranges 1650–1700, 900–1450, 800–1050 and 600–1350 μmol g−1, respectively. Fast equilibrium time was obtained (15–20 min) for sorption of the target metal ions. The sorption behaviors of metal ions by [Sil-Phy-NPANI] and [Sil-Phy-CrossNPANI] were reflected by Langmuir and Freundlich isotherm models. The designed nanocomposites were successfully applied for adsorptive removal of Cu(II), Cd(II), Hg(II) and Pb(II) from drinking tap water, sea water and wastewater samples with excellent recovery values." @default.
- W2473253232 created "2016-07-22" @default.
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- W2473253232 date "2016-11-01" @default.
- W2473253232 modified "2023-10-11" @default.
- W2473253232 title "Nanocomposites of nanosilica-immobilized-nanopolyaniline and crosslinked nanopolyaniline for removal of heavy metals" @default.
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- W2473253232 doi "https://doi.org/10.1016/j.cej.2016.06.110" @default.
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