The Potential of Date-palm Leaf Ash as Low-cost Adsorbent for the Removal of Pb(II) Ion from Aqueous Solution

被引：11
作者：
Ghorbani, F. [1 ]
Sanati, A. M. [1 ]
Younesi, H. [1 ]
Ghoreyshi, A. A. [2 ]
机构：
[1] Tarbiat Modares Univ, Fac Nat Resources, Dept Environm Sci, POB 64414-356, Noor, Iran
[2] Babol Noshirvani Univ Technol, Fac Chem Engn, Babol Sar, Iran
来源：
INTERNATIONAL JOURNAL OF ENGINEERING | 2012年 / 25卷 / 04期
关键词：
Date-palm; Leaf Ash; Adsorption; Pb(II);
D O I：
10.5829/idosi.ije.2012.25.04b.03
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The feasibility of Date-palm (Phoenix dactylifera) Leaf Ash (DLA) (a low-cost agricultural-byproduct) for adsorption of Pb(II) ions was investigated. An adsorption process was carried out to evaluate initial concentration, adsorbent dose, contact time, pH and temperature on the removal of Pb(II). The removal efficiency decreased with an increase of initial Pb(II) concentration and optimum removal efficiency of 99.72% was at 50 mg/l Pb(II) solution, 0.5 g/l DLA dose and pH level of 5. The equilibrium data were analyzed using the Langmuir and Freundlich isotherm models by nonlinear regression analysis at 20, 30 and 40 degrees C. It was found that the Langmuir isotherm model fitted better than the Freundlich isotherm model. The kinetic adsorption of Pb(II) ions was analyzed by the pseudo-first-order, the pseudo-second-order and the intra-particle diffusion model, demonstrating the overall adsorption was the one most suited to the pseudo-second-order kinetic model. Thermodynamic parameters, Gibbs free energy (Delta G degrees), enthalpy (Delta H degrees), and entropy (Delta S degrees) were also evaluated with application of the van't Hoff equation that describes the dependence of equilibrium constant on temperature. The thermodynamics of Pb(II) adsorption onto DLA demonstrated that adsorption was spontaneous and endothermic.
引用
收藏
页码：269 / 278
页数：10
相关论文
共 44 条
[1]  
Melegy A., Adsorption of Lead (II) and Zinc (II) from Aqueous Solution by Bituminous coal, Geotechnical and Geological Engineering, 28, pp. 549-558, (2010)
[2]  
Huang L.-Z., Zeng G.-M., Huang D.-L., Li L.-F., Huang P.-M., Xia C.-B., Adsorption of lead(II) from aqueous solution onto Hydrilla verticillata, Biodegradation, 20, pp. 651-660, (2009)
[3]  
Liu S.-Y., Gao J., Yang Y.-J., Yang Y.-C., Ye Z.-X., Adsorption intrinsic kinetics and isotherms of lead ions on steel slag, Journal of Hazardous Materials, 173, pp. 558-562, (2010)
[4]  
Gupta V.K., Ali I., Removal of lead and chromium from wastewater using bagasse fly ash - A sugar industry waste, Journal of Colloid and Interface Science, 271, 2, pp. 321-328, (2004)
[5]  
Blocher C., Dorda J., Mavrov V., Chmiel H., Lazaridis N.K., Matis K.A., Hybrid flotation - Membrane filtration process for the removal of heavy metal ions from wastewater, Water Research, 37, 16, pp. 4018-4026, (2003)
[6]  
Kryvoruchko A.P., Atamanenko I.D., Yurlova L.Yu., Concentration/purification of Co(II) ions by reverse osmosis and ultrafiltration combined with sorption on clay mineral montmorillonite and cation-exchange resin KU-2-8n, Journal of Membrane Science, 228, 1, pp. 77-81, (2004)
[7]  
Yan G., Viraraghavan T., Heavy-metal removal from aqueous solution by fungus Mucor rouxii, Water Research, 37, 18, pp. 4486-4496, (2003)
[8]  
Ghorbani F., Younesi H., Ghasempouri S.M., Zinatizadeh A.A., Amini M., Daneshi A., Application of response surface methodology for optimization of cadmium biosorption in an aqueous solution by Saccharomyces cerevisiae, Chemical Engineering Journal, 145, pp. 267-275, (2008)
[9]  
Bulut Y., Tez Z., Removal of heavy metals from aqueous solution by sawdust adsorption, Journal of Environmental Sciences, 19, pp. 160-166, (2007)
[10]  
Saeed A., Akhter M.W., Iqbal M., Removal and recovery of heavy metals from aqueous solution using papaya wood as a new biosorbent, Separation and Purification Technology, 45, 1, pp. 25-31, (2005)
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