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Biosorption of Lead Ions From Aqueous Solution by Terminalia catappa: Equilibrium and Kinetic Studie


Affiliations
1 Dept. of Chemical Engineering, GMR Institute of Technology, Rajam-532 127, Srikakulam (Dt), A.P., India
2 Dept. of Chemical Engg.,R.V.R & J.C. College of Engineering, Chowdavaram, Guntur-522 019, A.P., India
 

In the present investigation, the sorption is carried out to test thesuitability of abundantly available plant based material Terminalia catappa L. leaf powder as an adsorbent for removal of lead ions fromaqueous solution. The equilibriumstudies are systematically carried out in a batch process, covering various process parameters that include contact time, adsorbent size and dosage, initial lead ion concentration and pH of the aqueous solution. It is observed that there is a significant increase in percentage removal of lead ions as pH increases from2 to 6 and attainmaximumat pH 6. The contact time is to be 20minutes.The Langmuir isothermismore suitable for sorption followed by Freundlich and Temkin isotherms with a maximum adsorption capacity of 28.63 mg/g of lead ion on T. catappa leaf biomass. The sorption of lead ions follows second order kinetic model having a correlation coefficient of 0.9996.

Keywords

Biosorption, Terminalia catappa L., Adsorption Isotherms, Kinetic Studies.
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  • Biosorption of Lead Ions From Aqueous Solution by Terminalia catappa: Equilibrium and Kinetic Studie

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Authors

P. Kalpana
Dept. of Chemical Engineering, GMR Institute of Technology, Rajam-532 127, Srikakulam (Dt), A.P., India
N. Rakesh
Dept. of Chemical Engg.,R.V.R & J.C. College of Engineering, Chowdavaram, Guntur-522 019, A.P., India
L. Nageswara Rao
Dept. of Chemical Engg.,R.V.R & J.C. College of Engineering, Chowdavaram, Guntur-522 019, A.P., India

Abstract


In the present investigation, the sorption is carried out to test thesuitability of abundantly available plant based material Terminalia catappa L. leaf powder as an adsorbent for removal of lead ions fromaqueous solution. The equilibriumstudies are systematically carried out in a batch process, covering various process parameters that include contact time, adsorbent size and dosage, initial lead ion concentration and pH of the aqueous solution. It is observed that there is a significant increase in percentage removal of lead ions as pH increases from2 to 6 and attainmaximumat pH 6. The contact time is to be 20minutes.The Langmuir isothermismore suitable for sorption followed by Freundlich and Temkin isotherms with a maximum adsorption capacity of 28.63 mg/g of lead ion on T. catappa leaf biomass. The sorption of lead ions follows second order kinetic model having a correlation coefficient of 0.9996.

Keywords


Biosorption, Terminalia catappa L., Adsorption Isotherms, Kinetic Studies.