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Vol. 32 No. 3 (2020): Vol 32 Issue 3

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Enhanced Biosorption of Pb(II) Ions from Aqueous Solutions onto Citric Acid Treated Aspergillus niger Biomass: Equilibrium and Kinetic Studies

https://doi.org/10.14233/ajchem.2020.22346
Vinay Kumar Chintalapudi
R V Labs, Flat No. 1, First Floor Greeshma Residency, Beside Military Canteen, Syamala Nagar, Guntur-522006, India; Department of Biotechnology, Koneru Lakshmaiah Education Foundation, Greenfields, Vaddeswaram-522502, India
Ramya Krishna S.L. Kanamarlapudi
Department of Biotechnology, Koneru Lakshmaiah Education Foundation, Greenfields, Vaddeswaram-522502, India
Useni Reddy Mallu
R V Labs, Flat No. 1, First Floor Greeshma Residency, Beside Military Canteen, Syamala Nagar, Guntur-522006, India
Sudhamani Muddada
Department of Biotechnology, Koneru Lakshmaiah Education Foundation, Greenfields, Vaddeswaram-522502, India

Corresponding Author(s) : Sudhamani Muddada

sudhamani1@rediffmail.com

Asian Journal of Chemistry, Vol. 32 No. 3 (2020): Vol 32 Issue 3

Abstract

In the present study, initially Aspergillus niger was tested for biosorption of Pb(II) ions and then studied the effect of pretreatment for enhanced biosorption. It was found that the maximum biosorption potential was achieved with citric acid treatment (70.56 %) in comparison with the biomass without treatment (65.46 %) at a biosorbent dose of 20 mg/L, pH 4, 100 rpm, 37 ºC for 8 h. The optimized conditions for treated Aspergillus niger were determined by optimizing the biosorption parameters such as pH, temperature, biomass dose, incubation time and agitation speed. This study indicates that the citric acid treated Aspergillus niger is an effective biosorbent for removal of lead(II) at optimized conditions with the maximum biosorption potential of 83.6 % as compared to previous reported work. SEM-EDX and FTIR analysis showed the structural variations and the functional groups involved in lead biosorption, respectively. Biosorption kinetics showed that pseudo second order kinetic model as the better fit.

Keywords

Aspergillus niger Biosorption Citric acid Incubation Kinetics Lead
Chintalapudi, V. K., S.L. Kanamarlapudi, R. K., Mallu, U. R., & Muddada, S. (2020). Enhanced Biosorption of Pb(II) Ions from Aqueous Solutions onto Citric Acid Treated Aspergillus niger Biomass: Equilibrium and Kinetic Studies. Asian Journal of Chemistry, 32(3), 508–514. https://doi.org/10.14233/ajchem.2020.22346
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