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Ramasubbu Dhana Ramalakshmi Mahalingam Murugan Vincent Jeyabal

Abstract

Water contamination by toxic heavy metal ions causes a serious public health problem for humans. The present work reports the development of a new adsorbent of PsLw carbon-polyaniline composite by direct oxidation polymerisation of aniline with PsLw carbon for the removal of arsenic (As).  The structure and morphologies of the adsorbent were characterised by Fourier transform infrared spectroscopy (FTIR) and Scanning electron microscopy (SEM). The ability of the adsorbent for the removal of As(III) was estimated by batch and kinetic studies. The optimum adsorption behaviour of the adsorbent was measured at pH=6.0. The equilibrium process was found to be in good agreement with Langmuir adsorption isotherm and the maximum adsorption capacity was 98.8 mg/g for an initial concentration of 60 mg/L at 30 °C. The kinetic study followed pseudo-second-order kinetics. Thermodynamic parameters predict the spontaneous, feasible and exothermic nature of adsorption. Column operation was carried out to remove As(III) bulk and column data obeys the Thomas model. The results indicated that PsLw carbon-polyaniline composite can be employed as an efficient adsorbent than polyaniline for removal of As(III) from wastewater.

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Keywords

Adsorption, Isotherm, Mass transfer, Polyaniline, PsLw carbon, Thomas model

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Ramalakshmi, R. D. ., Murugan, M. ., & Jeyabal, V. . (2021). Sorption of Arsenic(III) from wastewater using Prosopis spicigera L. wood (PsLw) carbon-polyaniline composite. Journal of Applied and Natural Science, 13(4), 1283–1293. https://doi.org/10.31018/jans.v13i4.2969
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