Alginate metal complexation

Depolymerized Alginic Acid Solution NMR Studies. Studies are being conducted with depolymerized alginic acid. In these samples, the MG blocks were removed by acid hydrolysis lea dng shorter chains contmning mostly GG or MM blocks. For whole alginic acid, complexation of one ion to a GG block leads to a zipper effect. If two or more metal ions bind to GG blocks that are separated by one... 

We have studied the use of HA as adsorbent. A composite biopolymer adsorbent in which HA was immobilized by a combination of calcium alginate gel membrane and activated carbon powder was developed [6,8]. Furthermore, another HA was made by a thermal process [7]. Based on a metal complexation model [7,8], the effect of immobilization and insolubilization on the metal complexing ability of HA is discussed in the following sections. 

Many biopolymers arc known to bind metal ions strongly. Alginic acid used as the immobilizing agent also has a complexing ability with divalent metal ions. Many studies have been carried out on the application of AA to the aqueous phase separation of heavy metals, and the possibility of AA as the adsorbent material has been suggested [1-5]. HA-M comprises 20% AA on a dry weight basis. Therefore, it can be expected that AA plays an important role in metal adsorption by HA-M. 

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