NR  Vol.1 No.2 , December 2010
Adsorption of Pb(II) onto Modified Rice Bran
ABSTRACT
In this study, the modified rice bran was tested to remove Pb(II) from water. Batch experiments were carried out to evaluate the adsorption characteristics of the modified rice bran for Pb(II) removal from aqueous solutions. The adsorption isotherms, thermodynamic parameters, kinetics, pH effect, and desorbability were examined. The results show that the maximum adsorption capacity of the modified rice bran was approximately 70.8 mg Pb(II)/g absorbent at temperature of 25℃ and at the initial Pb(II) concentration of 400 mg/L and pH 7.0. And the adsorption isotherm data could be well fitted by both Langmuir equation and Freundlich equation. Thermodynamic studies confirmed that the process was spontaneous and endothermic. The adsorbed amounts of Pb(II) tend to increase with the increase of pH. The adsorption kinetic data can be satisfactorily described by either of the power functions and simple Elovich equations. The desorbability of Pb(II) is about 15-20%, and it is relatively difficult for the adsorbed Pb(II) to be desorbed. The relatively low cost and high capabilities of the rice bran make it potentially attractive adsorbent for the removal of Pb(II) from wastewater.

Cite this paper
nullH. Ye and Z. Yu, "Adsorption of Pb(II) onto Modified Rice Bran," Natural Resources, Vol. 1 No. 2, 2010, pp. 104-109. doi: 10.4236/nr.2010.12011.
References
[1]   K. N. Dietrich, P. A. Succop, R. L. Bornchein, K. M. Kraft, O. Berger, P. B. Hammond and C. R. Buncher, “Lead Exposure and Neurobehavioral Development in Later Infancy,” Environmental Health Prospective, Vol. 89, No. 11, 1990, pp. 13-19.

[2]   D. K. Saikia, R. P. Mathur and S. K. Srivastava, “Adsorption of Copper, Zinc and Lead by Bed Sediments of River Ganges in India,” Environmental Technology Letter, Vol. 8, No. 1-12, 1987, pp. 149-152.

[3]   J. H. Choi, S. D. Kim, S. H. Noh, S. J. Oh and W. J. Kim, “Adsorption Behaviors of Nano-Sized ETS-10 and Al- Subtituted-ETAS-10 in Removing Heavy Metal Ions, Pb2+ and Cd2+,” Microporous and Mesoporous Materials, Vol. 87, No. 3, 2005, pp. 163-169.

[4]   A. Wilczak and T. M. Keinath, “Kinetics of Sorption and Desorption of Copper(II) and Lead(II) on Activated Carbon,” Water Environment Research, Vol. 65, No. 3, 1993, pp. 238-244.

[5]   R. M. Taylor and R. W. Kuennen, “Removing Lead in Drinking-Water with Activated Carbon,” Environmental Programs, Vol. 13, No. 1, 1994, pp. 65-71.

[6]   M. Sekar, V. Sakthi and S. Rengaraj, “Kinetics and Equilibrium Adsorption Study of Lead(II) onto Activated Carbon Prepared from Coconut Shell,” Journal of Colloid and Interface Science, Vol. 279, No. 2, 2004, pp. 307- 313.

[7]   R. Ayyappan, A. C. Sophia, K. Swaminathan and S. Sandhya, “Removal of Pb(II) from Aqueous Solution Using Carbon Derived from Agricultural Wastes,” Process Biochemistry, Vol. 40, No. 3-4, 2005, pp. 1293-1299.

[8]   R. Naseem and S. S. Tahir, “Removal of Pb(II) from Aqueous/Acidic Solutions by Using Bentonite as an Adsorbent,” Water Research, Vol. 35, No. 16, 2001, pp. 3982-3986.

[9]   T. Mustafa, M. Ugur, Y. Baris and S. Mehmet, “Lead Removal in Fixed-Bed Columns by Zeolite and Sepiolite,” Chemosphere, Vol. 60, No. 10, 2005, pp. 1487- 1492.

[10]   S. V. Dimitrova and D. R. Mehandgiev, “Lead Removal from Aqueous Solutions by Granulated Blast-Furnace Slag,” Water Research, Vol. 32, No. 11, 1998, pp. 3289- 3292.

[11]   V. K. Gupta, M. Gupta and S. Sharma, “Process Development for the Removal of Lead and Chromium from Aqueous Solutions Using Red Mud - An Aluminium Industry Waste,” Water Research, Vol. 35, No. 5, 2001, pp. 1125-1134.

[12]   V. K.Gupta and I. Ali, “Removal of Lead and Chromium from Wastewater Using Bagasse Fly Ash - A Sugar Industry Waste,” Journal of Colloid and Interface Science, Vol. 271, No. 2, 2004, pp. 321-328.

[13]   Y. Bulut and Z. Baysal, “Removal of Pb(II) from Wastewater Using Wheat Bran,” Journal of Environmental Management, Vol. 78, No. 2, 2006, pp. 107-113.

[14]   A. ?zer, “Removal ofPb(II) Ions from Aqueous Solutions by Sulphuric Acid-Treated Wheat Bran,” Journal of Hazardous Materials, Vol. 141, No. 3, 2007, pp. 753-761.

[15]   H. P. Ye, Q. Zhu and D. Y. Du, “Adsorptive Removal of Cd(II) from Aqueous Solution Using Natural and Modified Rice Husk,” Bioresource Technology, Vol. 101, No. 14, 2010, pp. 5175-5179.

[16]   D. L. Sparks, “Kinetics of Soil Chemical Process,” Academic Press Inc, New York, 1999.

[17]   J. M. Gu and D. R. Ding, “A Study on the Characteristics of Adsorption for Zn2+, Cu2+, Pb2+ Ions onto Peat and Lignite,” Environmental Chemistry (in Chinese), Vol. 15, No. 4, 1996, pp. 343-346.

[18]   Y. B. Shen, Y. M. Zhu, Z. A. Wang and D. Z. Wei, “Adsorption of Pb2+ in Hydrofacies by diatomite,” Journal of Northeastern University (Natural Science, in Chinese), Vol. 24, No. 10, 2003, pp. 982-985.

 
 
Top