TY - JFULL AU - S. Rathnakumar and R. Y. Sheeja and T. Murugesan PY - 2009/9/ TI - Removal of Copper (II) from Aqueous Solutions Using Teak (Tectona grandis L.f) Leaves T2 - International Journal of Chemical and Molecular Engineering SP - 437 EP - 442 VL - 3 SN - 1307-6892 UR - https://publications.waset.org/pdf/9650 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 32, 2009 N2 - The experiments were performed in a batch set up under different concentrations of Cu (II) (0.2 g.l-1 to 0.9 g.l-1), pH (4- 6), temperatures (20oC – 40oC) with varying teak leaves powder (as biosorbent) dosage of 0.3 g.l-1 to 0.5 g.l-1. The kinetics of interactions were tested with pseudo first order Lagergran equation and the value for k1 was found to be 6.909 x 10-3 min-1. The biosorption data gave a good fit with Langmuir and Fruendlich isotherms and the Langmuir monolayer capacity (qm) was found to be 166.78 mg. g-1. Similarly the Freundlich adsorption capacity (Kf) was estimated as 2.49 l g-1. The mean values of the thermodynamic parameters ΔH, ΔS, and ΔG were -62.42 KJ. mol-1, -0.219 KJ.mol-1 K-1 and -1.747 KJ.mol-1 at 293 K from a solution containing 0.4 g l-1 of Cu(II) showing the biosorption to be thermodynamically favourable. These results show good potentiality of using teak leaves as a biosorbent for the removal of Cu(II) from aqueous solutions. ER -