Abstract
The adsorption of U(VI) on Paecilomyces catenlannulatus as a function of agitation time, pH and solution concentration was investigated by batch techniques. Hg(II) cation was also employed to compare the adsorption capacity of P. catenlannulatus in this study. The adsorption kinetics indicate that the adsorption of U(VI) and Hg(II) on P. catenlannulatus can be fitted by pseudo-second kinetic model very well. The optimum pH for U(VI) removal was 7.0, whereas the high level of adsorption of Hg(II) was observed at pH >7.0 due to the occurrence of precipitate (i.e., Hg(OH)2(s)). The maximum adsorption capacity of P. catenlannulatus calculated from Langmuir model was 163.93 and 140.85 mg g−1 for U(VI) and Hg(II), respectively. This paper highlights the application of P. catenlannulatus as suitable bio-materials for the preconcentration and removal of radionuclides from aqueous solutions in environmental pollution management.
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