Application of clay and its modified substances

[Application] are mainly used in clay and modifying substance of dye wastewater, heavy metal wastewater, leachate, the phenol waste water

Natural clay mineral materials have a large specific surface area and ion exchange capacity, and have good adsorption performance

Vermiculite Adsorption experiments showed that heavy metal ions, pH <4.

Clay has a good adsorption effect on uranium

Wu Pingxiao et al.

① Molecular adsorption mode Aminotriazole is adsorbed in the interlayer domain of montmorillonite in molecular form.

②Hydrogen bond adsorption mode.

③ Irreversible exchange adsorption mode Organic pesticides directly extract exchangeable cations from the interlayers of montmorillonite, and complex with these extracted cations to form insoluble compounds and precipitate on the outer surface of montmorillonite

④Proton adsorption mode Whether the protonation process occurs when organic pesticides are adsorbed to the interlayers of montmorillonite depends on whether the interlayer cations have the ability to capture electrons from the organic pesticide molecules.

⑤Adsorption decomposition mode The strong acidity of Al ³⁺ and Fe ²⁺ polarized water makes certain groups in the structure of organic pesticides (such as olefin groups, alcohol groups, hydroxyl groups, ester groups, etc.

In the experiment of using rectorite to adsorb CN- after adding FS01 reagent to cyanide-containing electroplating wastewater, Sun Jiashou et al .

The attapulgite clay grafted with polyacrylonitrile and saponified was used to adsorb Pb ²⁺ .

Table 4-9 Pb ²⁺ adsorption effect of saponified attapulgite clay grafted with polyacrylonitrile

It can be seen from Table 4-9 that the removal rate and adsorption capacity of Pb ²⁺ by the grafted attapulgite are significantly improved.

Using thermal activation combined with microwave to organically modify attapulgite clay (attapulgite), the best process conditions for phenol adsorption are: adding 2g of modified attapulgite to 100mL of 0.