Abstract
Abstract The accumulation of heavy metals in different components of the environment as a result of the anthropogenic interventions raises serious concerns due to their toxic behavior towards the humans and other forms of life. Dried bacterial biomass of Bacillus badius AK was characterized for its potential application in biosorption of Cd(II) in a batch system. The optimum conditions of biosorption were determined to be pH at 7, contact time of 30 min, initial biomass dosage of 2 g/L at a constant temperature of 40 °C, the initial metal concentration of 100 mg/L and agitation at 150 rpm. The maximum biosorption capacity of Cd(II) on Bacillus badius AK was 131.58 mg/g. Kinetics study revealed that the pseudo-second order model fitted better than the first order model. Langmuir isotherm fitting depicted the monolayer adsorption behavior. The results indicated that the bacterium Bacillus badius AK was effective in the removal of Cd(II), which provides important perspectives on its usage in the treatment of the contaminated wastewater on a large-scale.
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