Modelling of Mean Drop Size in a Extraction Spray Column and Developing a New Model

Document Type : Research Note


1 School of Chemical Engineering, Faculty of Engineering, University of Tehran, I.R. IRAN

2 School of Chemical Engineering, Faculty of Engineering, University of Tehran, Tehran,, I.R. IRAN

3 Chemical and Petroleum Engineering Department, Sharif University of Technology,Tehran, I.R. IRAN


In the present investigation the biosorption potential of rosa gruss an teplitz (Red Rose) Waste Biomass (RRWB) for the removal of Pb(II) and Co(II) from aqueous solutions was studied. The effect of different process parameters such as pH, biosorbent dose, biosorbent size, temperature, contact time, initial metal concentration and pretreatments on the biosorption capacity of this waste biomass was studied. The results showed that the equilibrium data for both metal ions followed the Langmuir isotherm with a biosorption capacity of 112.0 and 115.9 mg/g for Pb(II) and Co(II) respectively. The overall biosorption process was best described by pseudo-second-order kinetics. Modification of red rose waste biomass by pretreating with different reagents significantly improved its biosorption capacity. A maximum biosorption capacity of 99.72 and 51.68 mg/g was observed for Pb(II) and Co(II) by treating the biomass with methanol and polyethyleneimine + glutraldehyde respectively. The results clearly indicated that red rose waste biomass has a potential to remove heavy metals from aqueous solutions.


Main Subjects

[1] Katsuroku Takahashi, Susumu NII, Behavior of Multistage Mixer-Settler extraction Column, Memoirs of the School of Engineering Nagoya University, 51(1), (1999).
[2] Hughmark G.A., Liquid-Liquid Spray Column Drop Size, Hold-up, and Continuous Phase Mass Transfer, I & EC Fundamentals, 6(3), p. 408 (1967).
[3] Kumar A., Hartland S., Unified Correlations for the Prediction of Drop Size in Liquid-Liquid Extraction Columns, Ind. Eng. Chem. Res., 35, p. 2682 (1996).
[4] Desnoyer C., Masbernat O., Gourdon C., Experimental Study of Drop Size Distributions at High Phase Ratio in Liquid-Liquid Dispersions, Chemical Engineering Science, 58, p. 1353 (2003).
[5] Harold R., Null and Horner F. Johnson, Drop Formation in Liquid-Liquid System from Single Nozzles, AICHE Journal, 4(3), p. 273 (1958).
[6] Brodkorb M.J., Bosse D., Reden C., Gorak, A., Slater, M.J., Single Drop Mass Transfer in Ternary and Quaternary Liquid/Liquid Extraction Systems, Chemical Engineering and Processing, 42, p. 825 (2003).
[7] Michel Perrut, Jean-Yves Clavier, Supercritical Fluid Formulation: Process Choice and Scale-up, Ind. Eng. Chem. Res., 42, p. 6375 (2003).
[8] Perrut M., Loutaty R., Drop Size in a Liquid-Liquid Dispersion: Formation in Jet Break-up, Chem. Eng. J., 3(3), p. 286 (1972).
[9] Kumar A., Hartland S., Prediction of Drop Size Produced by a Multiorifice Distributor, Trans. Inst. Chem. Eng., 60, p. 35 (1982).
[10] Chun B. S., Wilkinson G. T., Drop Size and Hold-up in Countercurrent Extraction with Supercritical CO2 in Spray Column, Ind. Eng. Chem. Res., 39, p. 4673 (2000).
[11] Vedaiyan S., Degaleesan T. E., Laddha G. S., Mean Drop Size & Characteristic Velocity of Drop Swarm in Spray Column, Indian J. Technol., 12, p. 135 (1974).
[12] Seibert A. F., Fair J. R., Hydrodynamics and Mass Transfer in Spray and Packed Liquid-Liquid Extraction Columns, Ind. Eng. Chem. Res., 27, p. 470 (1998).
[13] Sudheer K.P., Panda R.K., "Digital Image Processing for Determining Drop Sizes from Irrigation Spray Nozzles, Agricultural Water Management, 45, p. 159 (2000).
[14] Barhate R.S., Ganapathi P., Srinivas1 N.D., Raghavarao K.S.M.S., Drop Formation in Aqueous Two-Phase Systems, Journal of Chromatography A, 1023, p. 197 (2004).
[15] Nandkishor K. Nere, Doraiswami Ramkrishna, Evolution of Drop Size Distributions in Fully Developed Turbulent Pipe Flow of a Liquid-Liquid Dispersion by Breakage, Ind. Eng. Chem. Res., 44, p. 1187 (2005)
[16] Babinsky E., Sojka P.E., Modeling Drop Size Distribution, Progress in Energy and Combustion Science, 28, p. 303 (2002).
[17] "EViews 4 User’s Guide", Quantitative Micro Software, LLC, (2002)