Sorption studies of Zn(II)- and Cd(II)ions from aqueous solution on treated sawdust of sissoo wood

被引：29

作者：

Ahmad A. ^{[1
]}

Rafatullah M. ^{[2
]}

Danish M. ^{[2
]}

机构：

[1] Environmental Technology Division, School of Industrial Technology, Universiti Sains Malaysia

[2] Analytical Laboratory, Department of Chemistry, Aligarh Muslim University

来源：

Holz als Roh - und Werkstoff | 2007年 / 65卷 / 06期

关键词：

Heavy Metal; Lignin; Activate Carbon; Sawdust; Langmuir Adsorption Isotherm;

D O I：

10.1007/s00107-007-0175-7

中图分类号：

学科分类号：

摘要：

Sawdust, an inexpensive material, has been utilized as an adsorbent for the removal of Zn(II)- and Cd(II)ions from aqueous solution. The effects of time of equilibrium, pH, temperatures and dosage of the adsorbent on the removal of Zn(II)- and Cd(II)ions have been studied. The equilibrium nature of Zn(II)- and Cd(II)ions adsorption at different temperatures (25-60 °C) has been studied. The percent adsorption of Zn(II)- and Cd(II)ions increased with an increase in pH, temperature and dosage of treated sawdust. The applicability of the Langmuir isotherm suggests the formation of monolayer coverage of Zn(II)- and Cd(II)ions at the surface of the adsorbent. The thermodynamic parameters like free energy, enthalpy and entropy changes for the adsorption of Zn(II)- and Cd(II)ions has also been computed and discussed. The heat of adsorption [ΔH=17.706 kJmole-1 for Zn(II) and ΔH=16.949 kJmole-1 for Cd(II)] implied that the adsorption was an endothermic adsorption. The sawdust was found to be a metal adsorbent as effective as activated carbon. © 2007 Springer-Verlag.

引用

页码：429 / 436

页数：7

共 40 条

[1]

Acemioglu B., Alma M.H., Sorption of Cu(II) ions by pine sawdust, Holz Roh- Werkst, 62, pp. 268-272, (2004)

[2]

Ajmal M., Mohammad A., Yousuf R., Ahmad A., Adsorption behavior of cadmium, zinc, nickel and lead from aqueous solutions by Mangifera indica seed shell, Indian J Environ Health, 40, pp. 15-26, (1998)

[3]

Ajmal M., Khan A.H., Ahmad S., Ahmad A., Role of sawdust in the removal of Cu(II) from industrial wastes, Water Res, 32, pp. 3085-3091, (1998)

[4]

Apek R., Tuten E., Hugul M., Hizal M., Heavy metal cations retention by unconventional sorbents (red muds and fly ashes), Water Res, 32, pp. 430-440, (1998)

[5]

Bansode R.R., Losso J.N., Marshall W.E., Rao R.M., Portier R.J., Adsorption of metal ions by pecan shell-based granular activated carbons, Bioresource Technol, 89, pp. 115-119, (2003)

[6]

Bayat B., Combined removal of Zn(II) and Cd(II) from aqueous solutions by adsorption on to high calcium Turkish fly ash, Water Air Soil Pollut, 136, pp. 69-92, (2002)

[7]

Chandra Sekhar K., Subramanian S., Modak J.M., Natarajan K.A., Removal of metal ions using an industrial biomass with references to environmental control, Int J Miner Process, 53, pp. 107-120, (1998)

[8]

Chung Y.S., Lee K.W., Yoon Y.S., Kwon S.H., Lim K.S., The adsorption behavior of heavy metal ions on sawdusts, Bull Korean Chem Soc, 13, pp. 212-214, (1992)

[9]

Davila-Jimenez M.M., Elizalde-Gonzalez M.P., Geyer W., Mattusch J., Wennrich R., Adsorption of metal cations from aqueous solution onto a natural and a model biocomposite, Colloid Surf A: Physicochem Eng Aspects, 219, pp. 243-252, (2003)

[10]

Elliot H.A., Huang C.P., Adsorption characteristics of some Cu(II) complexes on aluminosilicates, Water Res, 15, pp. 849-855, (1981)

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