Adsorption of arsenic in aqueous solution onto iron impregnated bagasse fly ash

Sundaramurthy Suresh; Mika Sillanpää; Fawzi Banat; Ravi Kiran Vissa

doi:10.1007/s40201-022-00827-w

Adsorption of arsenic in aqueous solution onto iron impregnated bagasse fly ash

J Environ Health Sci Eng. 2022 Aug 23;20(2):861-879. doi: 10.1007/s40201-022-00827-w. eCollection 2022 Dec.

Authors

Sundaramurthy Suresh¹, Mika Sillanpää^{2

3

4}, Fawzi Banat⁵, Ravi Kiran Vissa⁶

Affiliations

¹ Department of Chemical Engineering, Maulana Azad National Institute of Technology Bhopal, MP 462 003 Bhopal, India.
² Institute of Research and Development, Duy Tan University, Da Nang, 550000 Vietnam.
³ Faculty of Environment and Chemical Engineering, Duy Tan University, Da Nang, 550000 Vietnam.
⁴ Department of Chemical Engineering, School of Mining, Metallurgy and Chemical Engineering, University of Johannesburg, P. O. Box 17011, Doornfontein, 2028 South Africa.
⁵ Department of Chemical Engineering, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates.
⁶ Process Engineer, L&T AdVENT, Larsen & Toubro Ltd. Powai, Mumbai, 400 072 India.

Abstract

The present study examined the adsorption of As(III) and As(V) (arsenics) from aqueous solutions using FeCl₃ impregnated bagasse fly ash (BFA-Fe). Batch adsorption studies were carried out to evaluate the effect of various parameters like initial pH (pH ₀ ), adsorbent dose (m), contact time (t), initial concentration (C ₀ ) and temperature (T) on the removal of As(III) and As(V) from aqueous solutions. The maximum removal of As(III) and As(V) was found ~ 95% and ~ 97% at lower concentration (< 20 μg/dm³) and ~ 86% and ~ 87% at higher concentration (500 μg/dm³), respectively, using 3 g/dm³ of BFA dosage at 303 K. The adsorption of arsenics on BFA-Fe was very rapid. Pseudo-second-order kinetic model well represented the adsorption kinetics of both As(III) and As(V). Error analyses functions for adsorption of As(III) and As(V) onto BFA-Fe. Based on these error analyses, R-P isotherm was found to be fitted. Thermodynamic parameters, i.e., ΔG°, ΔH°, and ΔS°, were also calculated. At 25.0 to 45.0 °C, the values of ΔG° lie in the range of -43.85, -45.34, -48.82, -51.31, -53.8, and -44.75, -48.3, -51.84, -55.39, -58.93, -55.57 for As (III), and As (V) respectively, indicating that adsorption is spontaneous and exothermic in nature. Regeneration study was carried out by different solvent and thermal methods. Our results revealed that BFA-Fe can be reused directly for making fire-briquettes to explore its energy value. From this study, As containment is most effective removal from aqueous solution and mimic to any contaminated water resources.

Keywords: Arsenic ions; Bagasse fly ash; Effect of temperature; Ferric chloride; Isotherms.

© The Author(s), under exclusive licence to Tehran University of Medical Sciences 2022, Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.