RU1801551C - Filtering material for cleaning drinking water - Google Patents

Abstract

Usage: purification of drinking water from heavy metals, radionuclides and organic impurities. SUMMARY OF THE INVENTION: a filter charge consists of several layers of components arranged in the following sequence along the water to be purified: activated carbon, a phosphate layer of an element of group IV, a layer of microporous silica gel containing alumina or a mixture of the second and third components and newly activated carbon, the components are contained in the following proportions, vol%: phosphate of group IV element 15-30, microporous silica gel containing A120E - 5-15, activated carbon - the rest The invention allows to carry out simultaneous complex purification of drinking water from heavy metal ions, radionuclides, toxic organic compounds and microorganisms ft z0

Description

The invention relates to water treatment by the sorption method, in particular to compositions of sorbent-filtering materials used as a load of household filters

The known composition of the filter material for water purification, containing sand, ion-exchange resin, activated carbon and carbon impregnated with silver CO. However, with satisfactory purification of water from organic impurities and suspended solids, the known composition does not provide water purification from non-ferrous metals and radionuclides to MPC in the presence of last | in waters, j

Known composition of the filter material used in drinking water conditioners for home use

The known composition of the load contains a layer of cheap natural sorbent and a layer of a mixture of cation exchange and anion exchange resins with a ratio of the volumes of sorbent and resin 1: 5

However, the known composition does not provide bactericidal purification of water, and the degree of purification by organic impurities and non-ferrous metals is insufficient

The closest in technical essence and the achieved result

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ABOUT

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is a filter cartridge loading for the individual production of purified water, consisting of activated carbon, coral sand and ion exchange resin

A disadvantage of the known composition is the insufficient degree of purification of water for heavy metals and radionuclides

The aim of the invention is to increase the degree of purification of water for heavy metals and radionuclides.

This is achieved by filtering material for purification of drinking water, containing several layers of components located in the following sequence along the purified water: activated carbon, a mixture of phosphate of group IV element with microporous silica gel containing alumina or separate layers of these components and again activated carbon, the components are contained in the following ratio, obD:

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Group IV15-30

Microporous si5-15 - Rest

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Active carbon

It was proposed that the phosphate of group IV element be used in a peroxide form, microporous silica gel containing both Na and / or Ca form, Ti, Zr, Sn or mixtures thereof are used as element of group IV, and all filter components should have a granular composition 0.5-2 ms

The number of components was experimentally selected and it was found that, when exceeding the stated limits, the degree of water purification also increases in comparison with the prototype, however, in real conditions, the impurity content required by GOST, as well as the GOST-certified macrostructure of drinking water is reached only within the declared content limits loading components

EXAMPLE 1C Through a filter for the purification of drinking water with a volume of 1 dm3, containing a layer of granular sorbents (0.5-2.0 mm): 30 obD angle KAU (layer No. 1) - a mixture of zirconium phosphate (30 obD) in He02 form and silica gel in Na, Ca form (15 rd) layer Vs 2 and 25 rd angle KAU corner (layer G 3) pass 500 l of model solution

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A sample of contaminated drinking water at a rate of 50 l / h was prepared. A model solution was prepared by introducing lead ions (0.15 mg / l - 5) into tap water (initial Ca content - 0 mg / l, Mgz + - 10 mg / l). MPC), isotopes () and phenol (0.5 mg / l) 0

The test results are given in table 0 1 about

Example 20 All operations are similar to those described in example 1 (V 1 „1) with the difference that phosphates of group IV elements are used, whether or not processed

The test results of the properties are shown in table 2

Example 3O All operations are similar to those described in Example 1 (101) with the difference that silica gel is used in ionic form

The test results are shown in tabloZo.

Example o The sequence of sorbent layers in the filter is similar to that described in pr0 1 (No. 1 „1) with their volumetric content shown in the„ lo ”panel. 000 l of model solution

The test results are presented in the scoreboard b and 5 °

Example 5o. All operations are similar to those described in Example 1 (No. 1 „1), with the difference that BAU coal is used as active carbon, and titanium phosphate is used as element group IV phosphate. The degree of purification of the model solution with such a filter: according to Pb + 90% , Csirr 95%, phenol 60% 0

Example b “The sequence of layers of sorbents in the filter is similar to that described in example 1 (K 101) with the difference that 50 l of real tap water is passed through the filter. Table 0b presents data on the amount of absorbed transition metals and the total

waste filter activity, i

Claims (3)

The claims 1. Filter material for treating drinking water, containing activated carbon and a silica-containing object, characterized 51 in that, in order to increase the degree of water purification for heavy metals and radionuclides, it additionally contains a phosphate-based sorbent of group IV element, as a silica-containing sorbent it contains microporous silica gel containing alumina, in the following ratio components, vol.%: Sorbent based on the phosphate of an element of group IV of group 15-30 Microporous silica gel containing alumina. Activated carbon The rest of the filter material is formed by layers, activated carbon is located in the first and last layer along the water, and a sorbent based on the phosphate of group IV element and microporous silica gel containing alumina are located between them in separate layers or in a mixture with friend. 2. A material according to claim 1, characterized in that it contains a phosphate of an element of group IV in peroxide form. 3. The material according to paragraphs. 1 and 2, characterized in that, as the phosphate element of group IV, it contains phosphate of titanium, zirconium, tin, or a mixture thereof. P1551. 6  |. A material according to claim 1, characterized in that it contains microporous silica gel in the Na and / or Ca form. 5. The material according to paragraphs. 1-, characterized in that it contains components with a granule size G, 5-2 mm. 10 Table 1 twenty 25 thirty BC and CG did not mix about Designation 2, - the sequence of FC - .CG; - SG - Ts0 table 2 2СГ- Na959995 3SG-sa969995 kSG-n909795 KAU Zirconium Phosphate - H2Pg30 Silica gel - Sa15 KAU2 Table 35 35 20 20 Prototype thirty 5 thirty fifteen 5 60 fifteen 5 60 Table 5