Preparation method of filter element capable of removing heavy metals

Abstract

A preparation method of a filter element capable of removing heavy metals is characterized by comprising the following steps: (1) preparing a substrate filter element from a fibrous polymer by utilizing melt-blowing equipment or electrostatic spinning equipment, wherein the substrate filter element is a circular ring cylinder formed by concentrically winding one layer of material or more than one layer of material; (2) putting the substrate filter element into a reaction solution containing a heavy metal adsorbent for reaction; (3) washing the reacted substrate filter element with pure water to remove a residual solution in the substrate filter element; and (4) drying the washed substrate filter element to obtain the filter element capable of removing the heavy metals. Compared with the prior art, the filter element has the advantages that the removal effect is efficient and stable, the service life is long, the whole manufacturing process is simple, convenient and rapid, the cost is low, and large-scale production is easy to realize.

Description

technical field [0001] The invention relates to a preparation method of a water purification filter element material, in particular to a preparation method of a filter element capable of removing heavy metals. Background technique [0002] At present, the filter materials for removing heavy metals are mainly composed of the following categories: fibers, resins, separation membranes and activated carbons, fibers such as chelating fibers, or fiber filter materials prepared by other methods; resin modified ion The exchange resin has a certain function of removing heavy metals; the separation membrane is prepared by phase inversion, and the adsorbent is introduced to the surface of the separation membrane (such as a hollow fiber membrane), so as to realize the function of removing heavy metals. Activated carbon achieves the function of removing heavy metals by modifying the carbon powder or introducing an adsorbent during the sintering process. [0003] The Chinese invention pa...

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Problems solved by technology

This method has many steps and complicated process, and the active groups grafted by plasma technology have poor uniformity and stability

[0005] At present, the following problems commonly exist in the existing heavy metal removal materials: First, the preparation process is complicated and the cost is high: firstly, it needs to be prepared into fibers, membrane filaments or ion exchange resins, and then made into filter elements. The process is complicated and there are many links. Second, the material preparation process uses a large amount of organic solvents, and will produce a large amount of organic waste liquid and waste gas, which will pollute the environment; third, activated carbon and adsorbent are mainly combined by physical bonds, the binding ability is weak, and there are adsorption problems. The problem of agent loss, the performance stability of the filter element is at risk

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