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Adsorption of metal ions on lignin
Guo, Xueyan; Zhang, Shuzhen; Shan, Xiao-Quan
AbstractThis study investigated the adsorption of the heavy metal ions Pb(II), Cu(II), Cd(II), Zn(II), and Ni(II) on a lignin isolated from black liquor, a waste product of the paper industry. Lignin has affinity with metal ions in the following order: Pb(II) > Cu(II) > Cd(II) > Zn(II) > Ni(II). The adsorption kinetic data can be described well with a pseudosecond-order model and the equilibrium data can be fitted well to the Langmuir isotherm. Metal ion adsorption was strongly dependent on pH and ionic strength. Surface complexation modelling was performed to elucidate the adsorption mechanism involved. This shows that lignin surfaces contain two main types of acid sites attributed to carboxylic- and phenolic-type surface groups and the phenolic sites have a higher affinity for metal ions than the carboxylic sites. (C) 2007 Elsevier B.V. All rights reserved.
KeywordLignin Surface Complexation Model Heavy Metal Ions Adsorption
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GB/T 7714
Guo, Xueyan,Zhang, Shuzhen,Shan, Xiao-Quan. Adsorption of metal ions on lignin[J]. JOURNAL OF HAZARDOUS MATERIALS,2008,151(1):134-142.
APA Guo, Xueyan,Zhang, Shuzhen,&Shan, Xiao-Quan.(2008).Adsorption of metal ions on lignin.JOURNAL OF HAZARDOUS MATERIALS,151(1),134-142.
MLA Guo, Xueyan,et al."Adsorption of metal ions on lignin".JOURNAL OF HAZARDOUS MATERIALS 151.1(2008):134-142.
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