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Issue 11, 2013
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Improved removal of lead(ii) from water using a polymer-based graphene oxide nanocomposite

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Abstract

Poly(N-vinylcarbazole) (PVK) was blended with graphene oxide (GO) to form a PVK–GO polymer nanocomposite capable of adsorbing heavy metal from aqueous solutions. The homogenous distribution of GO in the PVK–GO nanocomposite was determined by X-ray photoelectron microscopy (XPS) and attenuated total reflectance – infrared spectroscopy (ATR-IR). The results show that the adsorption capacity of Pb2+ by the nanocomposite increased with increasing amount of GO. This phenomenon was attributed to the increasing concentration of oxygen-containing functional groups available in the nanocomposite. Furthermore, the adsorption of Pb2+ onto PVK–GO nanocomposite was influenced by pH changes. Higher pHs had a better adsorption capacity than lower pHs, due to changes in the nanocomposite surface properties. The highest adsorption capacity of the PVK–GO nanocomposite for Pb2+ was 887.98 mg g−1 and fits well the Langmuir model. This adsorption capacity was achieved using a 10 : 90 wt% ratio of PVK : GO at pH 7 ± 0.5 with a 90 min contact time. The high removal efficiency of this nanocomposite suggests that PVK–GO is effective and can be applied to remove heavy metals from water.

Graphical abstract: Improved removal of lead(ii) from water using a polymer-based graphene oxide nanocomposite

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Article information


Submitted
27 Sep 2012
Accepted
29 Jan 2013
First published
29 Jan 2013

J. Mater. Chem. A, 2013,1, 3789-3796
Article type
Paper

Improved removal of lead(II) from water using a polymer-based graphene oxide nanocomposite

Y. L. F. Musico, C. M. Santos, M. L. P. Dalida and D. F. Rodrigues, J. Mater. Chem. A, 2013, 1, 3789
DOI: 10.1039/C3TA01616A

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