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Synthesis of polyaniline/clay nanocomposites by in situ polymerization and its application for the removal of Acid Green 25 dye from wastewater

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Abstract

Synthesis, characterization and adsorption studies of polyaniline (PANI) and polyaniline/montmorillonite clay (PANI/MMT) nanocomposites have been carried out. In situ polymerization method was used to synthesize PANI/MMT nanocomposites using HCl as a catalyst and ammonium persulfate as an oxidizing agent. The molar ratio of monomer/oxidant was 1:1, and the polymerization was done at two different temperatures, i.e.,. 0° and 20 °C. Complete removal of Acid Green 25 (AG25) dye was achieved with PANI/MMT adsorbent. The kinetic adsorption data of AG25 dye were found to fit pseudo-second-order kinetic model. Since the removal of this dye takes place efficiently at a very fast rate, PANI/MMT nanocomposites will be excellent adsorbents in continuous adsorption systems.

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Acknowledgements

We would like to acknowledge the financial support from UGC (Rajiv Gandhi National Fellowship). We are also thankful to Prof S. N. Upadhyay, Emeritus Professor, Department of Chemical Engineering and Technology, IIT (BHU), for his valuable support.

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    Shivani Kalotra & Rajeev Mehta

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Kalotra, S., Mehta, R. Synthesis of polyaniline/clay nanocomposites by in situ polymerization and its application for the removal of Acid Green 25 dye from wastewater. Polym. Bull. 78, 2439–2463 (2021). https://doi.org/10.1007/s00289-020-03222-3

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