Biosorption of Cu2+ from Aqueous Solutions Using NaOH-Modified Fir Sawdust

Hong Mei Deng; Yong Heng Chen; Cui Qin Wu; Xue Xia Huang; Tao Liu

doi:10.4028/www.scientific.net/AMR.726-731.1827

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 726-731Biosorption of Cu2+ from Aqueous Solutions Using...

Biosorption of Cu²⁺ from Aqueous Solutions Using NaOH-Modified Fir Sawdust

Abstract:

Fir sawdust, a low-cost residual agricultural material, was used as adsorbent for the removal of Cu²⁺from aqueous solutions. Factors affecting the adsorption behavior of Cu²⁺, such as pH, initial metal concentration, contact time and temperature, have been carried out. The Cu²⁺ removal was pH-dependent, reaching a maximum at pH 5. The adsorption capacity of the fir sawdust from Langmuir adsorption isotherm was 38.6 mg/g at 25°C. The adsorption process followed pseudo-second-order kinetics. The equilibrium data fitted very well to the Freundlich isotherm. The negative ΔG^o values at various temperatures confirm that the adsorption processes are spontaneous.

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Periodical:

Advanced Materials Research (Volumes 726-731)

Pages:

1827-1832

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.726-731.1827

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Online since:

August 2013

Authors:

Hong Mei Deng*, Yong Heng Chen, Cui Qin Wu, Xue Xia Huang, Tao Liu

Keywords:

Biosorption, Cu²⁺, Fir Sawdust, Freundlich Isotherm Model

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