Preparation method of novel glass slag filter material with negatively charged modified surface

Abstract

The invention discloses a preparation method of a novel glass slag filter material with a negatively charged modified surface, wherein the preparation method includes the following steps: step S101, hydroxylation pretreatment of a glass slag surface: a, repeatedly cleaning a glass slag raw material for 5-6 times with 99.8% high-grade pure (GR) ethanol; b, successively putting the cleaned glass slag raw material into beakers containing deionized water, ethanol and acetone respectively, and carrying out ultrasonic treatment for 10 min respectively; c, completely blow-drying the glass slag raw material after ultrasonic cleaning with nitrogen; and d, putting the glass slag raw material after nitrogen blow-drying into an 'piranha' solution (with the volume ratio of concentrated sulfuric acid tohydrogen peroxide of 7:3), and then bathing in water for 1-2 h at the temperature of 95 DEG C. The novel filter material based on recycling of waste glass resources is achieved. Compared with a traditional filter material of quartz sand, the novel filter material has the advantages of backwash water saving and good filtering effect, has filter material which is not easy to lose, and is of great significance to reduce the production cost and running and operation difficulty of water plants and other use enterprises.

Description

technical field [0001] The invention relates to the fields of material science and adsorption science, in particular to a method for preparing a modified surface negatively charged novel glass slag filter material. Background technique [0002] Filtration is a widely used process in water treatment (purification of drinking water and treatment of wastewater). In the process of water treatment, filtration generally refers to the technological process of intercepting suspended impurities in water with a granular filter layer such as quartz sand, so that the water is clarified. Filtration can not only remove suspended solids in water, thereby reducing turbidity, but also reduce BOD, COD, heavy metal ion concentration, oil content and chromaticity with the removal of suspended solids. In the traditional water quality filtration process, ordinary quartz sand is generally used as the filter material in the filter tank. Later, light filter materials such as anthracite and ceramsit...

AI Technical Summary

Problems solved by technology

During the actual use of ordinary quartz sand filters, it is found that the quartz sand filter material has biofilm growth, low mechanical strength, and consumes a lot of flushing water. It often needs to be cleaned and backwashed regularly, and the filter material is replenished regularly to maintain its continuous filtration. Effect

It is found that after the quartz sand filter material has been used for a period of time, the biggest problem is the growth of biofilm. Due to the pores and ravines on the surface of ordinary quartz sand, the biofilm often fits closely with the surface of the filter material, making the intensity of backwashing and backwashing time It is getting bigger and bigger, which leads to the loss of the upper filter material, the continuous increase of the backwash water volume, the high production cost of the water plant, and the final replacement of the saturated filter material.

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