Nano iron-loaded bentonite adsorbent containing polyacrylamide for synergistically removing turbidity and preparation method thereof

Abstract

The invention discloses a nano iron-loaded bentonite adsorbent containing polyacrylamide for synergistically removing turbidity and a preparation method thereof. The nano iron-loaded bentonite adsorbent is characterized by being prepared from the following raw materials in parts by weight: 3 to 6 parts of polyacrylamide VN835, 30 to 50 parts of sodium bentonite, 20 to 40 parts of ethylene glycol, 5 to 10 parts of activated carbon, 10 to 15 parts of silver nitrate solution, 12 to 22 parts of FeSO4.7H2O, 2 to 4 parts of alginate fiber, 5 to 10 parts of KBH4, 20 to 30 parts of NaOH, an appropriate amount of deoxygenated water, 30 to 80 parts of deionized water and 20 to 100 parts of deoxygenated ethanol. According to the nano iron-loaded bentonite adsorbent disclosed by the invention, through silver-loaded activated carbon induced in the nano iron-loaded bentonite adsorbent, on one hand, the specific surface area of bentonite can be enlarged, so that the contact area of the nano iron-loaded bentonite adsorbent and pollutants can be increased, and the adsorption efficiency can be increased; on the other hand, deactivated nano-iron catalyst can be activated by silver particles, the catalytic activity and the purification effect can be increased, and meanwhile, the service life is prolonged.

Description

technical field [0001] The invention belongs to the field of groundwater purification, and in particular relates to a polyacrylamide-loaded nano-iron bentonite adsorbent for synergistic turbidity removal and a preparation method thereof. Background technique [0002] Bentonite is a natural nano-adsorption material mainly composed of montmorillonite. It has a large cation exchange capacity and has a strong adsorption capacity for pollutants. In recent years, it has been widely used in the adsorption treatment of organic pollutants and heavy metals in industrial wastewater. In addition, bentonite is also widely used in the fields of petroleum, daily use, chemical industry, energy and environmental protection. Compared with ordinary iron particles, nano-iron has higher activity and faster decontamination effect. In recent years, the pollution of heavy metal hexavalent chromium in groundwater has been paid more and more attention. Nano-iron can effectively reduce hexavalent chr...

AI Technical Summary

Problems solved by technology

However, nano-iron particles are small, so they are easy to agglomerate and oxidize and deactivate. Therefore, solving the problem of agglomeration of nano-iron and improving stability have become a research hotspot.

[0003] Li Chenhua used FeSO 4 ·7H 2 O and Na-based bentonite prepared an adsorbent for removing hexavalent chromium, but there are still problems such as small specific surface area, easy deactivation of nano-iron, and low adsorption efficiency.