Copper, mercury and chromium adsorption on natural and crosslinked chitosan films: An XPS investigation of mechanism

▶ Copper, chromium and mercury ions were adsorbed on natural and crosslinked (GLA and ECH) chitosan films. ▶ XPS analyses showed that these metals bind differently on GLA-crosslinked chitosan. ▶ Copper(II) stabilization was found to be poor in GLA-crosslinked chitosan. ▶ Hg(II) ions present higher adsorption capacity in this kind of matrix. ▶ Chromium(VI) was reduced in all three matrices.