DBSA doped polyaniline/multi-walled carbon nanotubes composite for high efficiency removal of Cr(VI) from aqueous solution

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[1] Kumar, Rajeev
[2] Ansari, Mohd Omaish
[3] 1,Barakat, M.A.
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Kumar, R. (olifiaraju@gmail.com) | 1600年 / Elsevier B.V., Netherlands卷 / 228期
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Dodecyl-benzene-sulfonic-acid (DBSA) doped polyaniline/multi-walled carbon nanotubes (DP/MWCNTs) nanocomposite was prepared by in situ oxidative polymerization. DP/MWCNTs was found to be ideal adsorbent for the removal of Cr(VI) as compared to pristine and oxidized MWCNTs. The adsorption of Cr(VI) onto DP/MWCNTs was found to be strongly dependent on the solution pH. The rate of Cr(VI) adsorption increased with the increase in solution temperature and followed pseudo-second order kinetics. The adsorption isotherm of Cr(VI) onto DP/MWCNTs fitted the Freundlich isotherm model and maximum monolayer adsorption capacity was found to be 55.55mgg-1. The values of thermodynamic parameters suggested that adsorption was spontaneous and endothermic in nature. The desorption of Cr(VI) was found to increase with the increase in solution pH and temperature. © 2013 Elsevier B.V;
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