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Received December 22, 2010
Accepted January 18, 2011
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Removal of arsenic from aqueous solution using polyaniline/rice husk nanocomposite
Babol University of Technology, P. O. Box 484, Babol, Iran 1Chemical Engineering Department, Babol University of Technology, P. O. Box 484, Babol, Iran
Eisazadeh@hotmail.com
Korean Journal of Chemical Engineering, July 2011, 28(7), 1532-1538(7), 10.1007/s11814-011-0014-8
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Abstract
The present study deals with the adsorption of arsenic ions from aqueous solution on polyaniline/rice husk (PAn/RH) nanocomposite. Batch studies were performed to evaluate the influence of various experimental parameters like pH, adsorbent dosage, contact time and the effect of temperature. Optimum conditions for arsenic removal were found to be pH 10, adsorbent dosage of 10 g/L and equilibrium time 30 minutes. Adsorption of arsenic followed pseudo-second-order kinetics. The equilibrium adsorption isotherm was better described by Freundlich adsorption isotherm model. The adsorption capacity (qmax) of PAn/RH for arsenic ions in terms of monolayer adsorption was 34.48mg/g. The change of entropy (ΔS0) and enthalpy (ΔH0) was estimated at .0.066 kJ/(mol K) and .22.49 kJ/mol, respectively. The negative value of the Gibbs free energy (ΔG0) indicates feasible and spontaneous adsorption of arsenic on PAn/RH.
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References
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Gbatu TP, Ceylan O, Sutton KL, Rubinson JF, Galal A, Caruso JA, Mark HB, Anal. Commun., 36, 203 (1999)
Ng SC, Zhou XC, Chen ZK, Miao P, Chan HSO, Li SFY, Fu P, Langmuir, 14(7), 1748 (1998)
Yang YJ, Huang HJ, Anal. Chem., 73, 1377 (2001)
Desimoni E, Bassani I, Anal. Commun., 36, 45 (1999)
Hepel M, Zhang XM, Stephenson R, Perkins S, Microchem. J., 56, 79 (1997)
Wampler WA, Basak S, Rajeshvar K, Carbon., 34, 747 (1996)
Alatorre MA, Gutierrez S, Paramo U, Ibanez JG, J. Appl. Electrochem., 28(5), 551 (1998)
Nakbanpote W, Goodman BA, Thiravetyan P, Physicochem. Eng. Aspects., 304, 7 (2007)
Vadivelan V, Kumar KV, J. Colloid Interface Sci., 286(1), 90 (2005)
Srivastava VC, Mall ID, Mishra IM, J. Hazard. Mater., 134(1-3), 257 (2006)
Ramesh A, Hasegawa H, Maki T, Ueda K, Sep. Purif. Technol., 56(1), 90 (2007)
Chakravarty S, Dureja V, Bhattacharyya G, Maity S, Bhattacharjee S, Water Res., 36, 625 (2002)
Thirunavukkarasu OS, Viraraghavan T, Subramanian KS, Tanjore S, Urban Water., 4, 415 (2002)
Maity S, Chakravarty S, Bhattacharjee S, Roy BC, Water Res., 39, 2579 (2005)
Lafferty BJ, Loeppert RH, Environ. Sci. Technol., 39, 2120 (2005)
Pena ME, Korfiatis GP, Patel M, Lippincott L, Meng X, Water Res., 39, 2327 (2005)
Kim Y, Kim C, Choi I, Rengaraj S, Yi J, Environ. Sci. Technol., 38, 924 (2004)
Ansari R, Feizy J, Delavar AF, E-Journal of Chemistry., 5, 853 (2008)
Palaniappan S, Eur. Polym. J., 37, 975 (2001)
Ray SS, Biswas B, Synth. Met., 108, 231 (2000)
Langmuir I, J. Am. Chem. Soc., 40, 1361 (1918)
Weber TW, Chakraborti RK, J. Am. Inst. Chem. Eng., 20, 228 (1974)
McKay G, Blair HS, Gardener JR, J. Appl. Polym. Sci., 27, 3043 (1982)
Freundlich H, Phys. Chem. Soc., 40, 1361 (1906)
Fadali OA, Magdy YH, Daifullah AA, Ebrahiem EE, Nassar NN, J. Environ. Sci. Health, Environ. Sci. Eng., 9, 465 (2005)
Wu FC, Tseng RL, Juang RS, Environ. Technol., 22, 205 (2001)
Raven KP, Jain A, Loeppert RH, Environ. Sci. Technol., 32, 344 (1998)
Annadurai G, Juang RS, Lee DJ, J. Hazard. Mater., 92(3), 263 (2002)
Ozacar M, Sengil IYA, Adsorption., 8, 301 (2002)
Ho YS, Chiang CC, Adsorption., 7, 139 (2001)
