RU2208479C1 - Sorption filling for water treatment filter - Google Patents

Abstract

FIELD: water treatment. SUBSTANCE: invention provides sorption-filtration material containing fine sorbents in the form of particles of thermally activated Ag-form bentonite and thermally oxidized pit in fibrous (preferably carbon) matrix. Filling cleans water, including tap water, from various impurities. EFFECT: expanded water treatment possibilities. 2 cl, 1 tbl

Description

 The proposed invention relates to sorbent-filtering materials that can be used to purify drinking water, in particular as loading household filters.

 Known composite aluminosilicate sorbent containing natural zeolite, and inert natural minerals (RU 2056934, 1996).

 Also known is granular synthetic zeolite type A containing Ag, Na, K, Ca, Mg cations as a material for water purification (RU 2074119, 1997).

 The disadvantages of the known sorbents is a low capacity for stiffness ions and an insufficient degree of purification for organic impurities.

 For complex water treatment, a loading containing carbon fiber, ion-exchange fiber, granular activated carbon and cellulosic fibrous material is recommended (RU 2019265, 1994).

 If drinking water must also be decontaminated, a charge containing granular activated carbon, carbon fiber material and an iodine-containing anion exchange resin can be used (RU 2040949, 1995).

 If the granular materials contained in the loads are used in the form of relatively large granules, the filter capacity for the contaminants is small, and if the components used are introduced into the powder in the form of a powder, the dynamic resistance of the filter increases.

 To reduce the resistance, special methods are usually used, for example, fractions of finely dispersed material with particles of certain sizes, usually at least 100 microns, are taken, filter materials are used in the form of thin layers several millimeters thick, or finely dispersed sorbent is washed into an inert loading layer or fibrous material.

 The closest in technical essence is the sorption filter load containing a fibrous material made in the form of a porous matrix with pore sizes decreasing along the liquid to be cleaned, in the pores of which finely dispersed material, for example coal or chalk, is distributed, while the particle sizes of finely dispersed material decrease in thickness matrices (RU 2185877, 07.27.2002).

 A disadvantage of the known load is the low capacity for stiffness ions and low disinfecting efficiency.

 An object of the present invention is to provide an integrated filter load of low cost materials.

The problem is solved by the described sorption loading of a filter for drinking water purification, which contains a porous matrix of fibrous material with a pore size decreasing along the stream of purified water, the volume of which contains fine particles of natural sorbents, namely bentonite calcined at 150-200 ^o С, containing silver as an exchange cation with a particle size of bentonite of 1.0-2.5 mm in an amount of 20-40 wt.% and thermally oxidized peat with a particle size of 0.5-1.0 mm in an amount of 10-20 wt.%.

 Preferably, the loading comprises activated carbon fiber as a fibrous material.

 Example.

To prepare the filter load, the following were used:
- carbon fiber material AUT-5,
- bentonite clay near Moscow,
- peat.

Bentonite clay is crushed, a fraction of 1.0-2.5 mm is taken, calcined at 150-200 ^o C for 1-2 hours, converted into an Ag form by treatment with a solution of AgNO ₃ and dried.

Peat fractions of 0.5-1.0 mm are heat treated in air at 250-300 ^o C for 30 minutes.

 To prepare 800 g of the filter load, 30 g of prepared bentonite, 15 g of peat and 55 g of fibrous material formed in the form of a cylinder are taken, the material having a pore size of ~ 100 μm in the upper part of the cylinder and ~ 10 μm in the lower part.

 An aqueous suspension of sorbents is filtered under vacuum through a formed fibrous material placed in a filter cartridge. In this case, bentonite particles mainly settle in the upper part of the material, and peat particles in the lower part.

 On the resulting filter load experiments were conducted on water purification, the results of which are shown in the table.

 The rate of water filtration through the filter charge was maintained at ~ 100 ml / min.

 As can be seen from the table, the resulting sorption filter load allows you to purify water from various kinds of impurities.

Claims (1)

1. Sorption filter loading for drinking water purification, containing finely dispersed natural sorbents in the volume of a porous matrix of fibrous material, the pores of which decrease along the stream of purified water, characterized in that it contains bentonite calcined at 150-200 ^o С containing silver as an exchange cation with a particle size of bentonite of 1.0-2.5 mm, and thermally oxidized peat with a particle size of 0.5-1.0 mm in the following ratio, wt.%:
Bentonite in Ag - form - 20-40
Thermally oxidized peat - 10-20
Fibrous Material - Else
2. Sorption charge according to claim 1, characterized in that it contains activated carbon fiber as a fibrous material.

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