Graphene-activated carbon composite filter element as well as preparation method and application thereof

Abstract

The invention relates to a graphene-activated carbon composite filter element as well as a preparation method and application thereof. The composite filter element comprises the following components by mass percentage: 50-80% of activated carbon, 1-20% of graphene, 10-20% of plastic rubber powder, 1-5% of an additive 1 and 5-10% of an additive 2. According to the preparation method, graft modification is carried out by mainly adding graphene and activated carbon, so that the original micropores are more refined, the filtration effect is enhanced, and the functionality is improved. The preparation method comprises the steps of grafting and blending the activated carbon and graphene powder with other components at a certain temperature, and then carrying out carbon rod package and encapsulating by using a graphene non-woven fabric. The obtained composite filter element has a better filtering effect, and has the effects of sterilizing by overflowing, removing heavy metals, retaining beneficial elements, improving mouthfeel, avoiding waste water, reducing secondary pollution, having large flux and the like.

Description

technical field [0001] The invention relates to the technical field of water filtration and purification, in particular to a graphene-activated carbon composite filter element and its preparation method and application. Background technique [0002] In 1835, Britain manufactured the world's first diatomite ceramic water filter tank, which can filter out large suspended particles in water and reduce water turbidity. In 1862, activated carbon was used for water purification. At that time, the industrial revolution was just beginning, and water pollution was expanded from biological pollution (pathogenic bacteria) to chemical pollution and became more and more serious. Activated carbon is particularly effective for chemical pollution of water, and at the same time greatly improves the smell, taste and taste of water. In the same year, French biologist Louis Pasteur discovered the existence of bacteria and their amazing reproductive ability, as well as the harm of bacteria to hu...

AI Technical Summary

Problems solved by technology

[0008] At present, most of the RO membrane water purifiers are used in the market. While the RO membrane isolates bacteria, there are three major defects: one is RO membrane filtration, which not only isolates most bacteria and viruses, but also isolates minerals and beneficial elements. Drinking pure water will lead to calcium, magnesium, iron, potassium and other beneficial elements, which will affect human health; second, various bacteria and viruses intercepted by the RO membrane adhere to the membrane surface and multiply in large numbers, forming membrane pollution

[0012] However, the above methods are to compound graphene with activated carbon in the form of solution, and because the particle size of graphene is larger than the pore size of activated carbon, or the agglomeration phenomenon of graphene, graphene only adheres to the surface of activated carbon after compounding, or directly blocks Activated carbon is microporous, and cannot enter the pores of activated carbon, resulting in the inability to further improve the filtration effect

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