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Adsorption of Dye from Wastewater by Modified Sawdust

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Abstract:

In this study, sawdust modified by cetyltimethyl ammonium bromide was applied to adsorb conge red in aqueous solutions. The characteristics of modified sawdust were characterized by Fourier transform infrared spectrum and scanning electron microscopy. The effect of factors, such as pH, contact time, temperature, dosage, and salt concentration, were investigated. The results revealed that the addition of modified sawdust can significantly increase the adsorption capacity of dye. The maximum adsorption capacity of dye on modified sawdust was 109 mg·g-1 at 328K. The adsorption processes were rapid within the first 30 min and reached equilibrium in about 150 min. The adsorption kinetics fitted well with pseudo-second-order model. The pH value of the solution had significant impact on the amount of adsorption. Adsorption isotherm fitted better with the Langmuir model and the adsorption was an endothermic process

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Periodical:

Advanced Materials Research (Volumes 1065-1069)

Pages:

3123-3126

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1065-1069.3123

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Online since:

December 2014

Authors:

Gang Chao Zhu, Jian Xin Shou, Jia Wei Qian, Hua Zheng Xin, Mu Qing Qiu

Keywords:

Adsorption, Sawdust, Surfactant

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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