Biosorption of
nickel and cadmium from spent battery in aqueous solution using Animal waste as
bio sorbent in a packed column
Divya K. and Abraham Jayanthi
Res. J. Biotech.; Vol. 20(4); 137-145;
doi: https://doi.org/10.25303/204rjbt1370145; (2025)
Abstract
A promising technique for eliminating heavy metals from the environment and industrial
effluents is biosorption. Toxic metals can be entirely removed from waste water
by using organic molecules in the absorption process, but this requires a physiochemical
mechanism. There are several approaches including the economical and environmentally
beneficial method of bio adsorption, to remove heavy metals from contaminated water.
Animal wastes including crab shells, fish scales and egg shells were used in research
to determine whether they might play as an efficient adsorbent to remove heavy metals
from wastewater. It has been reviewed that instead of using traditional ways to
remove heavy metals from waste water, unused animal parts could be used as an adsorbent.
The possibility and mechanism, as well as the variables influencing favourable conditions
that promote heavy metal adsorption, are examined in this study. It has been demonstrated
that the study supports the high metal adsorption capacity of animal wastes, materials
such as scales and shells and that the rate of adsorption is dependent on time,
pH, the initial concentration of metals and the concentration of the adsorbent during
suspension. With R2 values ranging from 0.9275 to 0.9894, isotherm modelling investigations
showed that the experimental data best suited the Freundlich and Langmuir models
respectively. Using the removal efficiency formula, the amount of adsorption of
each metal with various animal wastes material scales and shells was determined.
