| http://www.w3.org/ns/prov#value | - Another object of the present invention is to provide a chemically activated microporous membrane wherein polycarboxylic acids (such as polyamino acids), polyalkenoic acids and polypeptides are chemically attached to the membrane including within the pores in order to provide a relatively large number (e.g. 20-1000) of functional groups capable of metal ion entrapment per membrane attachment site.
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