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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472
EISSN: 1735-2630
Vol. 9, No. 3, 2012, pp. 565-578
Bioline Code: st12059
Full paper language: English
Document type: Research Article
Document available free of charge

International Journal of Environment Science and Technology, Vol. 9, No. 3, 2012, pp. 565-578

 en Biosorptive behaviour of mango leaf powder and rice husk for arsenic(III) from aqueous solutions
Kamsonlian, S.; Suresh, S.; Ramanaiah, V.; Majumder, C.B.; Chand, S. & Kumar, A.


The present study deals with the biosorption of As(III) from aqueous solution using mango leaves powder (MLP) and rice husk (RH) in a batch operation. Scanning electron microscopy and Fourier transformation infrared spectrometry analysis shows the surface texture of biosorbents and metal binding of functional groups of before and after biosorption of As(III). The optimum pH was obtained at 7 and 6 with 7 and 6 g/l of dosage of MLP and RH, respectively. The adsorption of As(III) onto MLP and RH was favourably influenced by an increase in temperature. Equilibrium data were well represented by the Freundlich isotherm model. Nitric acid and ethylenediaminetetra acetic acid was found to be a better eluant for the desorption followed by hydrochloric acid and sodium hydroxide of As(III) with a maximum desorption efficiency of 69.5, 48.5 and 79.4, 86.3 %, respectively. The pseudo-second-order kinetic model was found to best fitted of the experimental data over the equilibrium time at 32 h. The positive values of heat of adsorption (23.89 kJ/mol for MLP and 52.26 kJ/mol for RH) indicate the endothermic nature of the adsorption process. The thermodynamic study showed the spontaneous nature of the sorption of As(III) onto MLP and RH.

Arsenic; Adsorption; Biomass; Kinetic; Isotherm; Desorption

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