Polymers modification with metal chelates and their application to the recovery of metals and biocompounds from aqueous solutions
AdvisorGuzman Z., Roberto
MetadataShow full item record
PublisherThe University of Arizona.
RightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
AbstractThis work presents the results of studies for protein and metal separations from aqueous solutions by means of metal-chelating interactions using salt-polymer aqueous two-phase systems. Several polymer-chelates were synthesized and characterized. Polyethylene glycol (8000 M.W.) and sodium sulfate along with four different chelates (IDA, TED, Cm-TREN and L-ASP) coupled to monomethoxy polyethylene glycol (M-PEG), were used for the preparation of aqueous two-phase systems and the recovering of metals. The PEG-Chelators synthesized complexed with Cu⁺² Ni⁺² Co⁺² and Zn⁺² were used for the recovery of proteins from aqueous solutions. The influence of the pH, the chelated metal as well as the number of accessible histidine groups on proteins partitioning was investigated and found not to follow a linear relationship for all cases.