Bio-Separation of Toxic Arsenate Ions from Dilute Solutions by Native and Pretreated Biomass of Aspergillus fumigatus in Batch and Column Mode: Effect of Biomass Pretreatment
2008
Sathishkumar, M. | Binupriya, A. R. | Swaminathan, K. | Choi, J. G. | Yun, S. E.
The sorption of As(V) from aqueous solution onto live and pretreated biomass of Aspergillus fumigatus was studied. The studies on optimization of contact time, adsorbent dosage and pH showed that the FeCl₃ treated and FeSO₄ treated biomass had the maximum capacity to adsorb As(V) while acid treated biomass was found to be minimum. Adsorption parameters were determined using both Langmuir and Freundlich isotherm models. The maximum adsorption capacity of 0.054 mg/g was observed in FeCl₃ treated and FeSO₄ treated biomasses. Column mode studies were conducted using FeSO₄ treated biomass to compare its efficacy with batch mode to adsorb As(V). Batch mode experiments proved to be efficient. Desorption studies were also carried out with dilute sodium hydroxide to recover both the adsorbent and adsorbate.
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