Biomass characterisation and adsorption mechanism of Cu (II) biosorption onto fish (Catla catla) scales

Abstract

This study focused on the effect of various experimental parameters like adsorption kinetics, effects of pH, temperature, initial Cu(II), biosorbent dose and agitator speed on biosorption of Cu (II) from aqueous solution onto Catla catla fish scales. Analysis of Fourier-transform infrared (FTIR) spectrum, scanning electron microscopy (SEM) images and energy-dispersive X-ray (EDX) spectroscopy suggested that both organic functional groups and inorganic constituent take part in the Cu (II) uptake process. Both the linear and nonlinear forms of the Langmuir and Freundlich adsorption isotherm models (at low concentration) predicted the equilibrium adsorption isotherm data fairly well. The maximum Cu (II) adsorption capacity of fish scale was determined to be 79.35 mg/g at 40°C and pH 5.5 by nonlinear regression. A mathematical model developed assuming the adsorption process to be diffusion controlled gave satisfactory fit to the experimental batch kinetic data.

Response surface modelling of the biosorption of Zn(II) and Pb(II) onto Micropogonias undulatus scales: Box–Behnken experimental approach

“…Fish scales have also been studied as a source of biosorbents for heavy metal removal . Scales from fish species such as Gadus morhua (Basu et al 2006(Basu et al , 2007Rahaman et al 2015), Tilapia nilotica (Huang 2007;Zhe et al 2014;Zhu et al 2013), Oreochromis niloticus (Neves et al 2017;Ribeiro et al 2015;2018a, b), Labeo rohita (Chakraborty et al 2012;Iqbal et al 2011;Kondapalli and Mohanty 2011;Mandal et al 2015;Marrakchi et al 2016Marrakchi et al , 2017Nadeem et al 2008) and Catla catla (Das et al 2016;Kondapalli and Mohanty 2011;Prabu et al 2012;Srividya and Mohanty 2009) have been studied for the adsorption of pollutants from aqueous media. Croaker fish (Micropogonias undulatus) is scarcely investigated, and it is one easy way to assess in the current demographic of this study.…”