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Show simple item record Kera, Nazia H Bhaumik, M Ballav, N Pillay, K Ray, Suprakas S Maity, Arjun 2017-07-28T09:38:25Z 2017-07-28T09:38:25Z 2016-08
dc.identifier.citation Kera, N.H., Bhaumik, M., Ballav, N. et al. 2016. Selective removal of Cr(VI) from aqueous solution by polypyrrole/2,5-diaminobenzene sulfonic acid composite. Journal of Colloid and Interface Science, vol. 476: 144-157. en_US
dc.identifier.issn 0021-9797
dc.description Copyright: 2016 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, kindly consult the publisher's website. en_US
dc.description.abstract A polypyrrole/2,5-diaminobenzenesulfonic acid (PPy/DABSA) composite, synthesised by the in situ oxidative polymerization of pyrrole in the presence of DABSA, was studied as an adsorbent for the removal of Cr(VI) from aqueous solution. The structure and morphology of the composite were investigated by ATR-FTIR, FE-SEM, EDX, TGA, XRD and XPS studies. The adsorption of Cr(VI) by PPy/DABSA composite was highly pH dependent and optimum removal was achieved at pH 2. Adsorption of Cr(VI) was confirmed by EDX and XPS studies. The isotherm data fitted the linear Langmuir model well, with a maximum adsorption capacity of 303 mg/g at 25 °C. Thermodynamic parameters ( G°, H° and S°) were calculated using isotherm data and confirmed that the adsorption process was spontaneous and endothermic. Adsorption kinetics was best described by the pseudo-second-order model. The activation energy of the adsorption process suggested that Cr(VI) was chemisorbed by PPy/DABSA composite. PPy/DABSA composite could be used for three consecutive adsorption-desorption cycles without loss of its original adsorption capacity. Highly selective removal of Cr(VI) was observed even when co-existing ions such as Cu(sup2+), Zn(sup2+), Ni(sup2+), Cl(sup-), SO(sub4)(sup2-) and NO(sub3)(sup-) were present in the solution. In summary, the potential of PPy/DABSA composite for remediating industrial wastewater contaminated by Cr(VI) has been demonstrated. en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries Worklist;18493
dc.subject Polypyrrole en_US
dc.subject 2,5-Diaminobenzenesulfonic acid en_US
dc.subject Composite en_US
dc.subject Adsorption en_US
dc.subject Hexavalent chromium en_US
dc.subject Equilibrium en_US
dc.subject Isotherms en_US
dc.subject Kinetics en_US
dc.title Selective removal of Cr(VI) from aqueous solution by polypyrrole/2,5-diaminobenzene sulfonic acid composite en_US
dc.type Article en_US

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