Volume No. 7 Issue No.: 1A Page No.: 257-266 July-September 2012

 

Ageratum conyzoides LEAF POWDER FOR DECONTAMINATION OF IRON (III) : REMOVAL, ADSORBENT CHARACTERIZATION AND EQUILIBRIUM MODELING

 

Gunturu Chandrakala*, Bagchi Abhishek, Siva Kumar Ch V., Meera I.1, Naidu S. V. And Rao M.Narasimha2

1. Department of Biotechnology, Faculty of Science and Technology, ICFAI University, Dehradun (INDIA) 2. Centre for Biotechnology, Department of Chemical Engineering, Andhra University, Visakhapatnam (INDIA)

 

Received on : May 05, 2012

 

ABSTRACT

 

The present study explores the use of Ageratum conyzoides leaf powder (ACLP) for the effective removal of Fe(III) from aqueous solution. Experiments were conducted in batch mode to observe the influence of various parameters such as contact time (0-4 hrs), pH (1-2.5), adsorbent dosage (0-30 g/L), temperature (20-60°C), agitation speed (50-200 rpm) for different Fe(III) concentrations. The adsorption was found to increase with increase in contact time and biosorbent dosage. The results revealed that pH (2.0) and process temperature 40°C were optimum for Fe(III) biosorption. The Langmuir and Freundlich isotherm models were used to analyze the batch biosorption data and Langmuir model showed better representation of data with correlation coefficient of 0.994. The maximum biosorption capacity (qmax) was obtained 20.9 indicating strong binding capacity of the biosorbent. The biosorbent was analyzed using Fourier Transform Infrared spectroscopy (FTIR) to identify various functional groups involved in iron binding. Scanning electron microscope coupled with energy dispersive x-ray spectroscopic analysis (SEM-EDX) was carried out for both untreated and treated biomass to detect the presence of iron in adsorbed biomass.

 

Keywords : Adsorption isotherm models, Biosorbent, Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscope (SEM), Energy Dispersive X-ray spectroscopy (EDX)

 

 

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