Mesoporous manganese oxide adsorbent and method using plasma treatment to prepare adsorbent

Abstract

The invention relates to a mesoporous manganese oxide adsorbent and a method using plasma treatment to prepare the adsorbent and belongs to the technical field of water treatment. The preparation method includes the steps of firstly, synthesizing a mesoporous manganese oxide material; secondly, using plasma to treat the mesoporous manganese oxide material to obtain the plasma-treated mesoporous manganese oxide material; thirdly, using the plasma-treated mesoporous manganese oxide material as the adsorbent to adsorb lead ions in water. The plasma-treated mesoporous manganese oxide material usedfor adsorbing and removing the lead ions in the water is simple to operate and evident in removing effect, the adsorbent is renewable and recyclable, and cost for treating lead pollution in the watercan be lowered.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to a lead ion adsorbent in water and a preparation method thereof, in particular to a mesoporous manganese oxide adsorbent and a method for preparing the adsorbent by plasma treatment. Background technique [0002] Excessive lead ion content in water will not only seriously affect the aquatic ecosystem, but also pose a serious threat to human health. Adsorption is a simple and efficient method for removing lead ions in water. Among the commonly used adsorbents, manganese oxide adsorbent has the advantages of large specific surface area and rich surface hydroxyl groups, and has an excellent effect in removing lead ions in water, and has attracted the attention of many researchers. In different manganese oxide crystal structures, β-MnO 2 Although the adsorption and removal effect of the adsorbent is relatively poor, the adsorption capacity after normalizing the specific surfac...

AI Technical Summary

Problems solved by technology

[0003] β-MnO 2 Adsorbent modification methods include doping other metal elements, load dispersion, grafting functional groups, etc., although these methods can improve the β-MnO 2 The number of surface adsorption sites improves the utilization efficiency of the adsorbent, but the modification operation steps are cumbersome, which not only increases the cost of the adsorbent, but these modification methods cannot improve the β-MnO 2 The specific surface area, the number of adsorption sites that can be increased has a certain upper limit, which affects the adsorption and removal effect of the adsorbent

And the use of plasma technology (plasma) in Ar, O 2 , N 2 , CO 2 In the gas atmosphere, through surface abrasion, etching, crosslinking, etc., although different active components can be modified on the surface of the material, such as functional groups such as hydroxyl, carbonyl, and carboxylic acid, but the surface of large metals can be modified, or In the catalytic reaction, as a reaction auxiliary means to generate reactive active sites, it takes a long time to continuously generate plasma, resulting in high energy consumption and high cost when using plasma technology.