Filtering medium for removing radioactive strontium in drinking water, filter element and preparation method

Abstract

The invention provides a preparation method of a filtering medium for removing radioactive strontium in drinking water. The preparation method comprises steps as follows: a), UHMWPE (ultra-high molecular weight polyethylene) powder, activated carbon powder, attapulgite powder, zeolite powder and a pore forming agent are mixed in the weight ratio being (100-300):(50-100):(100-200):(100-200):(50-100), and a mixture is obtained; b), the mixture obtained in the step a) is pressed, sintered and cooled in a die, wherein the pressing pressure is 0.4 MPa-1MPa, the sintering temperature ranges from 200 DEG C to 245 DEG C, the sintering time lasts for 90-120 min, and the cooling temperature ranges from 40 DEG C to 60 DEG C. The filtering medium prepared at a specific sintering temperature and cooling temperature under specific pressure has a high removal rate for radioactive strontium under the synthetic function of the raw materials, the method is simple, the filtering medium is suitable for the drinking water polluted by radioactive strontium, eliminates harm of radioactive strontium to a human body, is simple and convenient to use and low in cost, and a detection result shows that with the adoption of the filtering medium, the removal rate of radioactive strontium in the drinking water is higher than 98.8%.

Description

technical field [0001] The invention relates to a filter medium for removing radioactive strontium 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] With the continuous development of nuclear power applications, the disposal of radioactive nuclear waste has become an urgent problem to be solved, and it has also become a key issue for the healthy development of nuclear power. [0003] Radioactive strontium (strontium 89 and strontium 90) is produced by 235 U and 239 Produced by Pu nuclear fission, it is commonly found in radioactive water bodies. In 2011, the Fukushima nuclear power plant in Japan exploded, resulting in radioactive leakage and a large amount of waste water containing radioactive strontium was discharged. because 90 The radioactive half-life of Sr is about 30 years. It has strong biological toxicity and is difficult to discharg...

AI Technical Summary

Problems solved by technology

[0004] The conventional water treatment process of the waterworks has no obvious effect on the removal of radioactive strontium; the chemical precipitation method, ion exchange method, and evaporation concentration method are troublesome to use; the RO membrane removal effect is good, but the energy consumption is large, the waste water is expensive, the cost is high, and the discharge The concentrated solution is not easy to handle, and it is easy to cause secondary pollution

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