Adsorption of phenols and amino acids

Adsorption of phenols

Zhang Xingsong and others used reverse-phase suspension epichlorohydrin cross-linking and chloroacetic acid carboxymethylation to prepare cross-linked carboxylated chitosan microspheres, and used them in the adsorption study of 2,4-dinitrophenol

Adsorption of amino acids

The author and members of the research team used homemade spherical chitosan beads to adsorb and remove three substances, such as glycine (Gly), lysine (Lys) and alanine (Ala), and discussed the main factors affecting the adsorption effect in the adsorption experiment.

①The influence of the pH value of the solution The pH value of the adsorbate solution is one of the important factors affecting the adsorption effect

Figure 4-24 The influence curve of the pH value of the solution on the adsorption effect.

It can be seen from Figure 4-24 that the pH value of the adsorbate solution can not only affect the surface charge of the beads, but also affect the degree of hydrolysis and ionization of the adsorbate.

②The influence of adsorption time The influence of adsorption time on the adsorption effect is shown in Figure 4-25

③The influence of the initial concentration of adsorbate The influence of the initial concentration of adsorbate on the adsorption effect is shown in Figure 4-26

It can be seen from Figure 4-26 that in the amino acid solution with high initial concentration, the adsorption capacity of the beads is also high, that is, the adsorption capacity increases with the increase of the amino acid concentration, but as the adsorption capacity of the beads becomes saturated, the adsorption capacity The capacity tends to be saturated with the increasing concentration of amino acids

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