The method of obtaining antibacterial material for water disinfection

 

(57) Abstract:

Usage: in the technology of water purification from microorganisms iodine disinfectant. The inventive method of obtaining antibacterial material for water disinfection is that the anion-exchange material containing the group's strong base in the form of salts capable of reaction with the formation of iodine-containing complexes, condition, coderoute and from the processed material is removed odnoletnii iodine to the absence in the wash water oxidizing iodine, with air conditioning pre-swollen polymer is carried out with solutions of alkali and chloride of alkali metal or acid salt, as jodorowski agent use solution polyiodide in the degree of saturation corresponding to the degree of saturation of the final product, and after the iodination reaction mixture was kept for 8 - 10 hours at normal temperature. The way technological and quite simple to implement and allows you to get the disinfectant with high efficiency. Received bactericidal material allows you to kill the microorganism and viruses when they are significant concentrations (up to 10 cells/l). table 2.

The invention relates to water treatment technology, and continetti for water purification, containing iodine, are strongly basic anion-exchange materials, for example, Quaternary ammonium groups and contain different levels of molecules associated iodine /tri-, Penta-, hepta - iodide / per reactive group of the material.

Such materials are called disinfectants, acting on the request /demand type bactericide/. One of the necessary and fundamental differences of such materials is the absence of oxidizing iodine when processing it with water. Only if the environment of microorganisms materials begin to work as disinfectants. They contain ions as complexes of triiodide, pentaiodide, Leptidea or mixtures thereof. The mechanism of action of these disinfectants is not yet clear. A method of obtaining this kind of bactericidal materials containing iodine complexes on the basis of a strongly basic anion-exchange resins /U.S. Patent 4238477, CL 61L 2/16, C02F 1/42, 1980/ in which pre-air-conditioned */ strongly basic anion-exchange resin with tertiary amine groups in the form of an ammonium salt of a base capable of reacting with ions of iodine, first translated in the form of iodide, and then treated with equimolar amount of molecular iodine /J2, though 40 95oWith, preferably 60 to 95oC. */Conditioning alternate processing in various ion-exchange cycles. For conditioning of ion exchange materials have the necessary stability of the structure, there is a partial cleaning and increases the uniformity of the ion /Polyansky, N., Methods of study of ion/.

Depending on the ratio of resin iodine get polyiodide with any iodine content /three, Penta, hepta or a mixture thereof/. Circulation saturated with iodine water is carried out until complete adsorption of iodine pellets of the resin. Interaction advisable PR led in the fluidized bed at a temperature of 60 90oC. air Conditioning resin includes washing first with deionized water, then twice with ethanol, processing alkylating agent dimethylsulfate, exposure for 10 to 12 hours, subsequent first washing twice with ethanol, and then deionized water.

As mentioned above, the method allows to obtain polyiodide with any iodine content, but a significant disadvantage is the low-tech, because saturated iodine solution water at elevated temperature /60 90oWith/ leads to considerable complications in implementation of the e l e C because the process is connected with the circulation of heated reaction medium in a long time /10 12 hours/.

Object of the invention to develop a method of producing a bactericidal material containing polyacid that being technologically advanced and quite simple to implement would get the disinfectant with high efficiency /high bactericidal action, i.e., the ability to kill microorganisms and viruses with their concentration, up to 106CL/l/.

This objective is achieved in that in a method of producing a bactericidal material containing polyiodide systems for water disinfection, including air conditioning strongly basic anion-exchange material with the group's strong base in the form of a salt capable of reacting with iodide ions, salt and posleduushie remove odnoletnego iodine from the specified material to the absence in the wash water oxidizing iodine, according to the invention the pre-conditioning of the swollen material is carried out with solutions of alkali and alkali metal chloride or hydrochloric acid, as jodorowski agent use politid in degree of saturation with iodine, is suitable is at room temperature 8 to 10 hours.

The principal difference of the proposed method from the prototype is primarily used as jodorowski agent solution polyiodide in the degree of saturation, in what should be the final product.

Another distinctive feature of the proposed method are other conditioning of the sequential processing of pre-swollen material with solutions of alkali and alkali metal chloride or hydrochloric acid. It was during this operation, there is preparation material for the quantitative interaction with political. When conditioning on the proposed method is the deformation of the polymer network, resulting in the possibility to use the whole exchange capacity of the anion exchange resin, thereby contributing to a more complete saturation and the formation of stable complexes with a high content of iodine molecules. Extract the reaction mixture after iodization at room temperature for 8 to 10 hours allows almost quantitatively to enter the iodine anion exchange material.

A known method of producing triiodide based on anion-exchange resins /U.S. patent N 3923665, CL SW 3/06, 1975/ in which pre-conditioned strong-base anion exchange resin with tertiary groups am what astora of triiodide, then from the processed material is removed blatny iodine no /negative reaction for oxidizing iodine determined by the cadmium-starch test and ion of iodine by the reaction with AgNO3/.

However, this method allows to obtain politid only in the form of triiodide and one of the basic conditions for its exercise is repeated processing of the obtained triiodide solution of potassium iodide in order to secure the removal of political higher than the J3because this method does not allow one to get a stable connection higher than 3 degrees of saturation and produce molecular iodine. According to the authors of the above-mentioned patent obtaining sustainable political with iodine 3 rooting by this method is impossible in principle.

The terms of the proposed method, namely the combination processing of the polymer matrix in a series of currency Cl--OH-using as jodorowski reagent solution polyiodide with higher iodine content than three /pentaiodide, a mixture of Penta - and triiodide in any percentage, peptide/ in contrast to the method according to U.S. patent N 3923665 allow to obtain a stable anion-exchange materials with iodine Oia/ determine the density of moist anion exchange resin in the pre-regular graphs for each specific material).

As the anion-exchange material subject to jodirovannuju, can be used in a variety of anion exchange material, in particular stereoselectivity resin based on styrene and divinylbenzene /gel and macroporous structure/.

The following examples illustrate the proposed method.

Example 1. Bactericidal material containing iodine in the form of pentaiodide. To prepare the solution of pentaiodide 700 g of crystalline iodine is placed in a beaker and dissolved in an aqueous solution of potassium iodide /230 g J in 180 ml of H2O/. The mixture is heated to 80 85oC. After complete dissolution of the iodine solution is ready to use.

To obtain a bactericidal material containing iodine in the form pentaiodide complex, industrial anionite AV-17-8 is placed in a preheated 50 60oWith deionized water for 1 hour, water is drained, washed twice with deionized water. 1 l of the swollen resin is treated with a 0.1 n solution of sodium hydroxide, leave for 8 hours, then washed with distilled water twice and treated with a solution of 0.1 m sodium chloride. The supernatant layer is drained, the resin is washed with water until a negative reaction to Cl-in AgNO3. Excess water is removed.

OCI at room temperature. Prosvetlenno the supernatant liquid is poured, the sorbent is washed with water, 0.5 m solution J and deionised water until a negative reaction to the J2and J-. Get the sorbent density 1,80,02 g/cm3that corresponds to the material containing ideny complex in the form of pentaiodide.

Example 2. Bactericidal material containing iodine in the form of a Penta - and triiodide /50 50/.

For preparation of a solution containing tri - and pentaiodide complexes /50 50/ 530 g of crystalline iodine is placed in a beaker and dissolved in an aqueous solution of potassium iodide /230 g J in 180 ml of H2O/. The mixture is heated to 80 85oC. After complete dissolution of the iodine solution is ready to use.

To obtain a bactericidal material containing iodine in the form of a Penta - and triiodide /50 50/ industrial anionite AV-17-8S placed into heated to 50 - 60oWith deionized water for 1 hour, water is drained, washed with double deionized water. 1 l of the swollen resin is treated with a 0.1 n solution of sodium hydroxide, leave for 8 hours, then washed with distilled water and treated with a solution of 0.1 m sodium chloride, the supernatant layer is drained, the resin is washed with water until a negative reaction to Cl-in AgNO3. Houses is which type anion exchange resin in the CIP room temperature and the reaction mixture was kept for 10 hours. Prosvetlenno the supernatant liquid is poured, the sorbent is washed with water, 0.5 m solution J and deionised water until a negative reaction to the J2and J-receive sorbent density 1,640,02 g/cm3that corresponds to the material containing iodine complex in the form of a Penta-and triiodide /50 50/.

Example 3 Bactericidal material containing iodine in the form of a Penta - and triiodide /60 40/.

For preparation of a solution containing tri-and pentaiodide complexes /40 60/ 564 g of crystalline iodine is placed in a beaker and dissolved in an aqueous solution of potassium iodide /230 J in 180 ml of N2About/. The mixture is heated to 60 - 85oC. After complete dissolution nd Yes the solution is ready to use.

To obtain a bactericidal material industrial anionite AV-17-8 treated according to the method described in example 1, the prepared solution.

Get the sorbent density 1,700,02 g/cm3that corresponds to the material containing ideny complex in the form of a Penta-and triiodide /60 40/.

Example 4. Carried out according to the method of example 2, except that as starting material used sorbent Jonac A-540.

Get the sorbent density 1,700,02, calibration, grafio the method of example 2, except that as starting material used sorbent Amberlite JRA-400S.

Get the sorbent density 1,670,02, calibration curve, determine the composition of the iodide complex in the sorbent. It conforms to the shape of the Penta - and triiodide 50 50.

Example 6. Bactericidal activity of the prepared materials were tested for water samples containing microorganisms E. coli. Water samples were passed through columns filled with a material, obtained by the proposed method. Used for water purification materials, as well as the concentration of microorganisms in the original sample and after treatment with adsorbents are presented in table 1.

Example 7. Bactericidal activity was tested for the treatment of water containing enterovirus /is a model of hepatitis b And/. The water content of enterovirus 300 IU per cm3was passed through a column Packed with the sorbent AB-17-8S-pentetreotide /50 50/. The layer height in column 2 see Data on the concentration of virus in the source and missed water are presented in table 2.

Thus, obtained by the proposed method bactericidal materials are able to kill microorganisms and viruses in water at significant concentrations and are Vysokoye on an industrial scale.

A method of obtaining a bactericidal material for disinfection of water containing polyiodide complexes on the basis of anion-exchange material containing the group a strong Foundation in the form of a salt capable of reaction with the formation of iodine-containing complexes, including air conditioning anion-exchange material, iodination and subsequent removal odnoletnego iodine from treated material prior to the absence in the wash water oxidizing iodine, characterized in that the pre-conditioning of the swollen polymer is carried out with solutions of alkali and alkali metal chloride or hydrochloric acid, as jodorowski agent used solution of polyiodide in the degree of saturation corresponding to the degree of saturation of the final product, and after the iodination reaction mixture was incubated for 8-10 h at normal temperature.

 

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