Filter medium for removing ammonia nitrogen in drinking water and preparation method thereof

Abstract

The invention discloses a filtering medium for removing ammonia nitrogen from drinking water and a preparation method thereof, and further relates to a filtering core consisting of the filtering medium, a water purifying device and a water dispenser. The method for preparing the filtering medium comprises the following steps of: a) mixing raw material containing ultrahigh molecular weight polyethylene, zeolite molecular sieve powder, active carbon powder, active atlapulgite powder and pore-forming agent in a weight ratio of 200-400: 80-300: 80-200: 80-250: 50-150; and b) pressing the mixture obtained in the step a) in a die, and sintering and cooling the mixture. The filtering medium provided by the invention has high removal rate for the ammonia nitrogen in water, is fast in removing speed, simple in use and low in cost without subsequent treatment; and the filtering medium can avoid the harm to human body. The filtering medium is suitable for treating drinking water at a home terminal; and the removing ratio of ammonia nitrogen in water is higher than 98%.

Description

technical field [0001] The invention relates to a filter medium for removing ammonia nitrogen in drinking water and a preparation method thereof, a filter element, a water purification device and a water dispenser composed of the filter medium. Background technique [0002] Ammonia nitrogen refers to the free ammonia (NH 3 ) and ammonium ions (NH 4 + ) in the form of nitrogen. People's life and industrial and agricultural production, such as chemical industry, metallurgy, paint pigment, gas, coking, leather tanning, chemical fertilizer and other industrial wastewater will cause a large amount of ammonia nitrogen-containing sewage to enter the water body, resulting in an increasing ammonia nitrogen content in the source water of the waterworks. Ammonia nitrogen will react with organic halides in water, etc., reducing the bactericidal effect; some water plants have advanced treatment of tap water, and ammonia can generate carcinogenic nitrite through nitrification and denit...

AI Technical Summary

Problems solved by technology

Ammonia nitrogen will react with organic halides in water, etc., reducing the bactericidal effect; some water plants have advanced treatment of tap water, and ammonia can generate carcinogenic nitrite through nitrification and denitrification under the action of microbial membranes in activated carbon filter beds ; It will also lead to the production of a large number of chlorine disinfection by-products and affect the biological stability of the water from the water plant, so that bacteria and microorganisms in the water supply network will multiply and breed, and the drinking water will have peculiar smell; it will lead to the phenomenon of eutrophication in the water body, and aquatic organisms, especially algae, will be massive. Breeding, destroying the ecological balance of the water body, deteriorating the water quality, poisonous to fish and some aquatic organisms, not only polluting the scarce fresh water resources in our country, but also affecting the development of fisheries, directly endangering human health

[0003] The removal effect of ammonia nitrogen by the conventional water treatment process in the water plant is not ideal; the stripping method is complex and costly; high-concentration ammonia-nitrogen has an inhibitory effect on microorganisms, and biological nitrification and denitrification have limitations in treating high-concentration ammonia-nitrogen wastewater; reverse osmosis method consumes a lot of electricity And water, high cost, complicated equipment; ion exchange resin has low exchange capacity and poor selective adsorption capacity

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