Binding of copper(II) and zinc(II) ions on various lignins

摘要: Abstract Lignins formed by the decay of woods are present in rivers, lakes, at estuaries and swampy coastal waters. Their interactions with copper(II) zinc(II) ions were studied shown to depend on provenience lignin. Copper is bound more strongly than zinc. The pH-dependence indicates that COO − may be involved binding Cu(II), whereas phenolate groups Zn(II). predominantly irreversible indicating ion-exchange not prevailing mechanism. Some specimens lignin show simple adsorption isotherms presence a single type site, some others complex isotherms, two different sites or states accessibility. effect neutral salts due changes structure, revealing concealing will affect ability water varying salinity.