Title: [Characteristics of Cu2+ adsorption by sawdust].
Abstract: Sawdust was used to remove the copper ion from water as an absorbent. The result showed that adsorption of Cu2+ on the sawdust was a very rapid process and arrived at equilibrium about 1 h. The pseudo-second order kinetic equation gave better fitting result (R2 > 0.99). The main mechanism of adsorption of Cu2+ on the sawdust was ion exchange, and the adsorption capacity increased as pH increased. Ion strength had some effects on adsorption capacity: one part of Cu2+ was held in an inner-sphere complex and the other part of Cu2+ was held in an outer-sphere complex. Adsorption capacity of treated sawdust by acid and base increased compared to original sawdust. Isotherm of treated sawdust was fitted well by Langmuir-Freundlich model; original sawdust was fitted well by Langmuir model. Thermodynamics analysis showed that the adsorption process was spontaneous, exothermic and the entropy increased.
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
Indexed In: ['pubmed']
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Cited By Count: 1
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