Application of modified starch adsorbent

[Application] Modified starch adsorbents are mainly used to remove heavy metal ions in industrial wastewater such as electroplating, mining, lead battery manufacturing and brass smelting

Fu Zhengsheng et al.

Table 4-42 The adsorption value of different metal ions for the four kinds of graft copolymers after three cycles of adsorption and desorption.

Among them, the chemical formulas of A, B, C, and D are as follows:

Table 4-43 shows the adsorption of three kinds of cross-linked starch to metal ions

Table 4-43 The adsorption of metal ions on three kinds of cross-linked starch

Xu et al.

Table 4-44 The adsorption of metal ions on several cross-linked amphoteric starches

The author used static and dynamic methods to study the adsorption effect of carboxymethyl starch (CMS) adsorbent on Cr ³⁺ and Al ^{3+ and} the effect of pH on the adsorption effect, and then used different concentrations of HCl solution (0.

Table 4-45 CMS adsorbent adsorption effect of Cr ³⁺ , AI ³⁺

In the 1970s, American WINGR.

ISX is used to treat nickel-containing electroplating wastewater, and the removal rate reaches more than 95%, and the residual nickel concentration is less than 0.

Wang Yuting et al.

Jin Mantong uses a soluble starch solution pretreated with potassium persulfate and pasteurized to polymerize acrylic acid to prepare starch grafted acrylic acid.

Zou Xinxi uses corn or sweet potato starch, anionized and cationized with epichlorohydrin and etherifying agent ( chloroacetic acid and 3-chloro-2 hydroxypropyl trimethyl ammonium chloride) to prepare amphoteric starch.