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Polypyrrole-coated halloysite nanotube clay nanocomposite: synthesis, characterization and Cr(VI) adsorption behaviour

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dc.contributor.author Ballav, N
dc.contributor.author Choi, HJ
dc.contributor.author Mishra, SB
dc.contributor.author Maity, Arjun
dc.date.accessioned 2015-03-12T10:11:13Z
dc.date.available 2015-03-12T10:11:13Z
dc.date.issued 2014-12
dc.identifier.citation Ballav, N, Choi, H.J, Mishra, S.B and Maity, A. 2014. Polypyrrole-coated halloysite nanotube clay nanocomposite: synthesis, characterization and Cr(VI) adsorption behaviour. Applied Clay Science, vol. 102, pp 60-70 en_US
dc.identifier.issn 0169-1317
dc.identifier.uri http://ac.els-cdn.com/S0169131714004037/1-s2.0-S0169131714004037-main.pdf?_tid=cd479c72-9cbd-11e4-a1e2-00000aacb360&acdnat=1421330153_095065d8bfb8309a9a1a95bbe98db9e4
dc.identifier.uri http://hdl.handle.net/10204/7940
dc.identifier.uri https://www.sciencedirect.com/science/article/pii/S0169131714004037
dc.identifier.uri https://doi.org/10.1016/j.clay.2014.10.008
dc.description Copyright: 2014 Elsevier. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, please consult the publisher's website. en_US
dc.description.abstract A polypyrrole-coated halloysite nanotube nanocomposite (PPy-HNTs NC) was prepared via in situ polymerization of pyrrole (Py) in the dispersion of HNTs and assessed for the removal of toxic Cr(VI) from aqueous solutions. ATR-FTIR and XRD results confirmed the formation of the nanocomposite. The FE-SEM and TEM images revealed the coating of PPy in the halloysite matrix and the surface morphology of the PPy-HNTs NC. Batch adsorption study showed that the adsorption process was very fast and kinetic data well fitted with pseudo-second-order kinetic model. Adsorption isotherms followed the Langmuir isotherm model and the maximum adsorption capacity was found to be 149.25 mg/g at pH 2.0 at 25 °C. The adsorption process was spontaneous and endothermic in nature. XPS study confirmed the adsorption of Cr(VI) onto the NC where some part of Cr(VI) reduced to Cr(III) by electron-rich PPy moiety. The desorption study suggested that the nanocomposite (NC) can be reused three times without loss of its original removal efficiency. Tests on contaminated groundwater and chrome mine water indicated the potential applicability of the adsorbents for the removal of Cr(VI) for actual field application. en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries Workflow;13865
dc.subject Polypyrrole en_US
dc.subject Halloysite nanotubes en_US
dc.subject Nanocomposites en_US
dc.subject Adsorption en_US
dc.subject Chromium(VI) en_US
dc.subject Wastewater en_US
dc.title Polypyrrole-coated halloysite nanotube clay nanocomposite: synthesis, characterization and Cr(VI) adsorption behaviour en_US
dc.type Article en_US


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