Abstract
Adsorption behaviors of Ni (II), CO (II) and Mn (II) on silk fibroin fiber and also on the same fibers but chemically modified with acetic anhydride-pyfidine mixture or dehydrated methanol were investigated, and the results were compared. The following findings are reported: (i) No adsorption of Ni (II), Co (II) and Mn (II) on the unmodified silk fiber was recognized below pH 4.5. The adsorbed amounts of these metal cations increased markedly in a pH range higher than 5.0; (ii) The adsorption isotherms of each metal cation were described in terms of the Langmuir-type adsorption formula at the equilibrium state at pH=5.0, and the adsorption of these metal cations was of endothermic reaction associated with entropy increase, (iii) The adsorption sites for these metal cations were assigned to the carboxyl end group of silk fiber at pH=5.0; while at pH=5.4, to the carboxyl and amino end groups.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
