Biosorption of lead (ii) from aqueous solution and industrial effluent by using leaves of araucaria cookii: application of response surface methodology

The aim of the present study involves the biosorption of Pb (II) by using the leaves Araucaria cookii from aqueous solution and industrial effluent. The batch studies were performed to evaluate the different parameters like pH, contact time, metal ion concentration, adsorbent mass and size variation. Characterization of biosorbent was carried out by Fourier Transform Infrared (FTIR) and Scanning Electron Micrograph (SEM). Experimental results shows that at pH 5 the biosorption efficiency reached a maximum removal of 98.52 with a contact time of 60 min and an initial ion concentration 200 mg/L. Kinetic models are described and fitted good with Pseudo- second order reaction. Langmuir and Freundlich isotherms were also applied and evaluated. The Central Composite experimental Design (CCD) in Response Surface Methodology was used to design the experiment and the optimum conditions. The result showed that the model and experimental data was favourable in the removal of Lead (II) in the industrial waste water and can be used as low cost biosorbent