Method of treating natural water

FIELD: chemistry.

SUBSTANCE: method of treating natural water includes oxidation, neutralisation and two-step filtration. Oxidation with simultaneous transfer of impurities into a dissolved state is carried out with carbonic acid solution obtained from saturating raw water with carbon dioxide. Neutralisation of the formed compounds is carried out with calcium hydroxide solution with concentration of 1-1.3 g/l, followed by removal of the precipitate first in a settling tank and on a filter with a neutral charge, and then on a filter with a weakly basic charge.

EFFECT: invention enables to remove iron and manganese compounds, bicarbonates of alkali-earth metals, silicic acid and salts thereof and organic impurities from water, simplifies the water treatment technique and lowers the content of impurities to values which do not exceed the maximum allowable concentration.

3 cl, 1 dwg, 1 tbl

 

The invention relates to the field of water purification and can be used to obtain drinking water from surface and underground sources.

A method of processing water in a liquid-gas ejector oxygen fed into the ejector at a pressure of 0.3 to 0.7 ATA, and subsequent processing water mineral acid (Patent RU 2208598 C1 IPC C02F 9/08, publ. 20.07.2003). The disadvantage of this method is the need for the use of mineral acids, salts which in purified water must be removed, which requires a more complex installation.

The known method of purification of drinking water (Patent RU 2238912 C2, IPC C02F 1/64, publ. 20.08.2003), comprising the sequential processing of the treated water with potassium permanganate and hydrogen peroxide, followed by filtration. The disadvantage of this method is the need to use scarce and unstable hydrogen peroxide.

The closest to the technical nature of the claimed is a method of water purification from impurities of iron, manganese, carbon dioxide and organic impurities, including water aeration air, sequential oxidation with sodium hypochlorite and alkalization lime mixers with subsequent two-stage filtration. In the first stage filtering on the lighting filter (quartz sand) delayed hydroxides of iron, manganese, and sulfur, ZAT the clarified water is additionally subjected to oxidation with sodium hypochlorite and is passed through the sorption filter (A.S. SU 1368846, C02F 9/00, publ. 23.01.1988).

The disadvantage of this method is twofold use in the purification of drinking water sodium hypochlorite, incomplete cleaning colloidal organoiron particles, increasing the hardness of the source water and the inability to clean the impurities of anionic character, in particular silicic acid and its soluble salts.

Object of the invention is a comprehensive treatment of water from groundwater and surface (river, lake, wetland) sources due to the removal of the water of compounds of iron, manganese, bicarbonate of alkali-earth metals, of silicic acid and its salts and organic impurities, simplifying purification of water and reduce the impurity content to values not exceeding the maximum allowable concentrations.

The problem is solved in that in the method of purification of natural waters, including oxidation, neutralization and two-stage filtration, oxidation with simultaneous translation impurities in a soluble state was carried out with a solution of carbonic acid, obtained in the initial water saturation with carbon dioxide, and neutralization of the resulting compounds is conducted with a solution of calcium hydroxide with a concentration of 1-1 .3 g/l, followed by the first residue in the sump and the filtrate is neutral, backfilling, and then on the filter with the weakly basic zasypko is.

The initial water saturation with carbon dioxide produced by its filing in the suction pipe of a centrifugal pump when the pressure of carbon dioxide more than 0.1 MPa.

As weakly basic backfill in the second stage of filtering is used brucite Mg(OH)2with a grain size of 3-10 mm

Iron in natural waters may be in the form of bivalent iron ions, in the form of colloidal organic and inorganic compounds in the form of a true solution of the organic compounds of divalent or trivalent iron. In the waters of rivers and lakes, especially wetland origin, the iron may be in the form of organic compounds or colloidal form. Manganese in groundwater is contained in the form of salts of divalent manganese, soluble in water. In the surface waters of the manganese may be in the form of colloidal or complex organic compounds (Handbook of the designer. The water supply of settlements and industrial enterprises - M.: stroiizdat, 1977, s-193).

When aeration is natural waters as a result of oxidation by air oxygen compounds of iron and manganese are transformed into an insoluble state in the form of colloidal Fe(OH)3and mn(OH)4. Similar processes occur at the contact of oxygen with surface waters, accompanied by the processes of adsorption of humic and D. the natives of organic compounds on the surface of colloidal particles of the hydroxide with the formation of very stable complexes nano-size, remove them from the water is a complex technical problem. In the proposed method, instead of aeration is used, the initial water saturation with carbon dioxide, resulting in a solution of carbonic acid with the concentration of CO2in the water within 60-440 mg/l (pH 6,2-4,1) at 20°C. In the interaction of carbonic acid with colloidal organic particles of hydroxides of iron and manganese is the destruction of these particles and formed water-soluble bicarbonates of metals for reactions:

Fe(OH)2+2CO2=Fe(HCO3)2;(1)

Fe(OH)3+2CO =Fe(HCO3)2+OH-(2)

Mn(OH)4+4CO2=Mn(HCO3)4.(3)

Technological scheme of initial water saturation with carbon dioxide and clean it etc who dstanley in figure 1.

Source water from the tank 1 via line 2 enters the centrifugal pump 3, the suction pipe from the tank 4 is supplied carbon dioxide at a pressure of 0.05 to 0.15 MPa. During the rotation of the pump impeller gas-liquid mixture under the action of centrifugal force radially discarded to the inner surface of the volute pump where there high blood pressure, which increases the intensity of the saturation of water with carbon dioxide. The pressure in the inlet tube of the pump due to the amount of pressure that must be generated to overcome the flow resistance occurring throughout the path of movement of water. Inside the cochlea pump is not only the dissolution of the gas in the water, but also begin to leak reactions (1-3).

Under the action of the pressure generated by the pump 3, the water via a regulating valve 5 flows into the intermediate tank 6 to complete the process of dissolving carbon dioxide in water and then in a conical reactor 7 with a nozzle made of inert aggregate (gravel, expanded clay) with a grain size of 10-20 mm In the lower part of the reactor 7 by a pump 8 from the tank 9 is supplied lime water with the concentration of calcium hydroxide at 1.17-1.22 g/l (Avivamiento. Mineral binders. - M.: stroiizdat, 1986, pp.92). In the preparation of lime water is used or the source in the well, any water supplied from the filter treatment stage 10 centrifugal pump 11, which enters the bottom of the tank 9 and passing through the layer of backfill (cassette) of calcium hydroxide, saturated with them. Contact lime water with water saturated with carbon dioxide, the reactor 7 the following reactions occur:

Ca(HCO3)2+Ca(OH)2=2CaCO3+2H2O;(4)

Mg(HCO3)2+Ca(OH) 2=CaCO3MgCO3+2H2O;(5)

Fe(HCO3)2+Ca(OH)2=CaCO3+FeCO3+2H2O; (6)

Mn(HCO3)2+Ca(OH)2=CaCO3+MnCO3+2H2O+CO2;(7)

H2SiO3+Ca(OH)2=CaOSiO22H2 O.(8)

When the reactions (4-8) are formed practically insoluble in water connection: calcite CaCO3dolomite CaCO3·MgCO3, siderite FeCO3, manganese carbonate MPMs3and hydrosilicate calcium CaO·SiO2·2H2O. In the same way, the formation of other metal ions which are present in the source water.

Water from the reactor 7 enters the settling tank 12, in which the result of the process of spontaneous coagulation (autocomplete), is the clarification of water. The clarified water flows to the filter treatment stage 10 filled with a neutral nozzle (quartz sand, shale, polypropylene wool, crushed burnt and zeolitic rocks), and then filter the second stage of filtration 13 filled with a weakly basic nozzle, which is used to draw the green strip brucite Mg(OH) 2with a grain size of 3-10 mm Purified water enters the tank 14, where the centrifugal pump 15 is fed into the water system clean drinking water.

An example of execution.

The proposed method is tested when cleaning well water iron concentration of 5.6 mg/l, manganese 0.18 mg/l, organic humic substances 3,8 MgO2/l and silica 20 mg/l at pH 7.5 ą 0.2. 200 ml of water with a temperature of 15°C were placed in a glass beaker with a tight lid, equipped with a stirrer (500 rpm) and a pipe for feeding directly into the water of carbon dioxide from a cylinder at 0.05 to 0.15 MPa. The saturation of water with gas was carried out for 1, 3, 5, and 10 minutes After water saturation with carbon dioxide, water was poured from the mixer into the glass, which was primevals lime water in the ratio 2:1. After prilipanie lime water to water saturated with carbon dioxide, was observed in all cases, the formation of turbidity, which in 5-10 min were combined into flakes due to autocomplete, and after additional mixing, sedimentation sediment and sedimentation filtration on a single-layer paper filter. The resulting filtrate was determined the content of impurities of iron, manganese, silicon, and organic matter. All data on the initial water saturation with carbon dioxide and impurities after neutralization with lime water are presented in the table, the analysis to the second allows to draw the following conclusions:

the concentration of carbon dioxide dissolved in water depends on the pressure of the injected gas and the time of contact of water with carbon dioxide;

satisfactory results for the saturation water CO2obtained by pressure of CO2more than 0.1 MPa for 5-10 min;

- the contents of the designated impurities in the water after treatment does not exceed the MPC values.

Great value in the proposed method of water treatment has pre-saturation of the water with carbon dioxide, causing the water becomes acidic properties, which are dissolved colloidal organic particles and due to this there is the destruction of these particles. The neutralization process such water lime water is accompanied by the formation of first nano-particles are then combined into flakes, which are not soluble in water and have high adsorption ability. All these facts confirm the high effectiveness of the proposed method of water purification, which cannot be achieved by using a number of known ways. The proposed method of water purification is simple to implement, does not require the use of scarce reagents, and the resulting precipitates are environmentally friendly carbonates of various metals. The method can be used to supply drinking water to a small inhabited the s points, camps in Siberia and the Far North.

The method of purification of natural waters
The pressure of CO2, MPaThe time of saturation of water with CO2, minThe concentration of CO2in water, mg/lThe pH of the waterThe content of impurities after cleansing water, mg/l
Iron (MPC=0.3 mg/l)Manganese (MCL=0.1 mg/l)Silicon (MCL=10 mg/l)Organics (TLV=5 mg O2/l)
1606,22,30,1618,03,2
31605,80,80,11of 17.52,9
0,0552505,1 0,250,0712,52,7
103404,60,220,05to 12.02,5
1906,00,910,1417,62,8
31805,50,720,1014,32,5
0,1052805,00,200,0710,22,0
103604,40,200,0510,02,0
the 11405,80,820,1216,22,8
0,1532205,30,240,0711,42,4
5340the 4.70,180,059,82,0
104404,10,150,059,51,8

1. The method of purification of natural waters, including oxidation, neutralization and the two-stage filtering, characterized in that the oxidation with simultaneous translation impurities in a soluble state was carried out with a solution of carbonic acid, obtained in the initial water saturation with carbon dioxide, and neutralization of the resulting compounds is conducted with a solution of calcium hydroxide with the concentration is on 1-1,3 g/l, followed by the first residue in the sump and filter with neutral backfilling, and then on the filter with weakly basic filling.

2. The method according to claim 1, characterized in that the initial water saturation with carbon dioxide produced by its filing in the suction pipe of a centrifugal pump when the pressure of carbon dioxide more than 0.1 MPa.

3. The method according to claim 1, characterized in that as the base of the backfill in the second stage filtering is used brucite Mg(OH)2with a grain size of 3-10 mm



 

Same patents:

FIELD: process engineering.

SUBSTANCE: invention relates to treatment of contaminated water. This method comprises bringing of water in contact with at least one adsorbent powder in zone (2) of preliminary interaction with mixing. Then, follow flocculation with weighted flakes and deposition. Mix of sediment, ballast and adsorbent powder is removed from sedimentation zone bottom (5). Said mix is fed into hydraulic cyclone (11) to displace hydrocyclone (11) top product containing the mix of sediment and adsorbent powder into transition zone (14). Mix of sediment and adsorbent powder are returned from transition zone (14) to zone (2) of preliminary interaction. Process incorporates the step whereat at least one index of adsorbent powder in preliminary interaction zone (2) is obtained. Suspension of green adsorbent powder in water is fed upstream of zone (2) when concentration of said powder in this zone is lower than preset threshold value and the step of acidification of said sorbent.

EFFECT: production of water suitable for drinking.

14 cl, 1 dwg, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to technologies of purification of water from natural springs for their further application as initial water for obtaining vapour in processes of steam or vapour-oxygen conversion of hydrocarbon gases (synthesis-gas production). Installation for preparation of desalinated water contains successively connected heat exchanger for heating initial water, unit of preliminary clarification, unit of ultrafiltration, unit of ultraviolet decontamination, unit of filters with filtration degree not more than 5 mcm and unit of two-step reverse osmosis.

EFFECT: invention ensures increase of service term of ultrafiltration and reverse osmosis membranes, water decontamination.

5 cl, 1 dwg

FIELD: chemistry.

SUBSTANCE: method of sewage purification from cyanide-ions includes its processing with sulfate of bivalent iron in quantity 293 wt.p to 100 wt.p. CN-ions in presence in water of sorbent in form of fibrillated cellulose fibres, which contain in wt %: not less than 54% of fibres with length not more 0.63 mm and not less than 94% of fibres with length not more than 1.23 mm, with formation of reaction product in form of insoluble particles of iron cyanide. Reaction product is obtained in form of composite material, which consists of cellulose fibres with sorbed on them iron cyanide particles. Product of processing is discharged from water with application of pressured flotation.

EFFECT: invention makes it possible to simplify process of purification, reduce iron sulfate consumption, increase purification degree and provide possibility of carrying out purification in continuous mode.

2 cl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to treatment of waste water containing organic contaminants in industry, agriculture and household conditions. The waste water treatment method involves treatment of the initial waste water with a coagulant and flocculant, separation thereof into sludge and clarified waste water. Further, the clarified waste water is treated with nanostructured boehmite until achieving a given degree of purity of the clarified waste water and then separated into purified waste water and a solid residue. The solid residue, which contains contaminated nanostructured boehmite, is collected and regenerated, while undergoing supercritical aqueous oxidation. The regenerated nanostructured boehmite is collected for subsequent recycling.

EFFECT: method enables recycling of treated waste water and nanostructured boehmite.

12 cl

FIELD: chemistry.

SUBSTANCE: invention can be used in small-size continuous purification plants for precipitating phosphorus from waste water, particularly household waste water. An apparatus, which is connected to the small-size purification plant, has a pumping tank (1), a discharge pump (2) for draining the pumping tank, a chemical reservoir (6) and a dosing pump (5) for the chemical coagulant which is meant for feeding the chemical coagulant from the chemical reservoir (6) into the waste water discharged from the pumping tank (1), wherein separation of the formed residue of chemical substance from water released from said purification plant takes place in the settling reservoir (12) of the small-size purification plant. The apparatus can entirely be placed inside the settling reservoir (12) of the small-size purification plant. The dosing pump (5) is configured to pump the chemical coagulant into a stream generated by the discharge pump (2) during the entire or almost entire operating cycle of the discharge pump (2).

EFFECT: invention provides complete mixing of treated water and reactant, increases the efficiency of precipitating phosphorus and enables to control the amount of chemical coagulant depending on fluctuations of the flow of waste water for efficient and simple precipitation of phosphorus.

11 cl, 1 dwg

FIELD: chemistry.

SUBSTANCE: invention can be used in production of extra-pure quartz concentrate which is one of the main sources of contamination by fluorine, chlorine and salts containing fluorine and chlorine. The method is realised via reactant treatment in two steps. The first step involves neutralisation of acidic waste water with 23% NH4OH with separation of the SiO2 precipitate and formation of NH4F solution. At the second step, said solution is treated with 20% lime milk. The formed CaF2 precipitate and previously separated SiO2 precipitate are washed, dehydrated and removed from the process as end products. The 7-8% NH4OH solution obtained after separating the CaF2 precipitate and flush water are returned to the first step for reactant treatment of waste water to prepare the starting NH4OH solution. The 7-8% NH4OH solution formed at the second step is concentrated by evaporation to 23% and returned to the first reactant treatment step. The condensate obtained during evaporation is directed for preparation of 20% lime milk, washing the SiO2 precipitate and into recycling cycle of the main production.

EFFECT: invention enables to cut the volume of discharge of industrial wastes into the environment, prevents formation of non-recyclable sludge and also reduces consumption of fresh water during production and enables to obtain high-quality products used in different industries.

3 cl, 1 ex

FIELD: chemistry.

SUBSTANCE: group of inventions relates to treatment of underground water from gases dissolved therein and can be used in water treatment. Source water containing hydrogen sulphide and impurities is fed through a pipe 1. The water is then fed into a floatation plant 3, having at least two chambers. At the first floatation step, a hydrogen sulphide neutraliser is fed through a nozzle 2 and at the second step, a chemical which facilitates precipitation of sulphates and sulphides is added. The treated water enters a settling tank 4, from where it is fed into a contact flocculator 6, having a gravel filling. The contact flocculator 6 is connected to the settling tank 4 through a nozzle 5, needed for feeding a flocculant.

EFFECT: group of inventions improves quality of treatment, simplifies and reduces the cost and labour input.

9 cl, 3 dwg, 3 tbl, 3 ex

FIELD: process engineering.

SUBSTANCE: set of intention relates to water treatment and may be used in various industries. First, chlorinated coagulant is subjected to electrochemical treatment at membrane or diaphragm electrolysis unit 3 with insoluble electrodes to produce high-basic coagulant and gaseous chlorine. High-basic coagulant is mixed with water flow fed into settler 4 for coagulation and flocculation of undissolved suspensions and mechanical impurities. Gaseous chlorine withdrawn from electrolysis unit is fed into chlorine proportioner 6 to make bleaching water. Said water is fed for decontamination in cleaned water flow between said settler 4 and mechanical filter 8.

EFFECT: higher quality of purification.

2 cl, 1 dwg, 3 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to waste water treatment techniques. The method involves treating water with sodium phosphate in the presence of fibrillated cellulose fibres in amount of 100 pts.wt per 100-900 pts.wt of the formed aluminium phosphate. Water can be pre-treated with sodium hydroxide solution in the presence of said fibres. The treatment product is separated by pressure flotation.

EFFECT: invention provides high treatment efficiency.

2 cl, 1 dwg, 3 ex

FIELD: process engineering.

SUBSTANCE: invention relates to treatment of whatever effluents and may be used in oil production and processing industries, petrochemical industry, etc. Proposed device represents treatment system comprising intake chamber communicated with flotation assembly inlet and settling assembly as well as with unit distributing inert gas and gas-water mix communicated with flotation unit outlet and settling unit inlet. Note here that settling unit is composed of tight modules of thin-layer settlers while flotation unit is composed of a system of tight modules of flotation chamber with impeller-type dispersers. Note also that foam product collector assembly is equipped with inert gas feeder and communicates with flotation unit inlet, settling unit inlet and aforesaid distributing unit to make closed-circuit circulation system.

EFFECT: higher safety and efficiency.

17 cl, 4 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to complex water treatment with a sodium persulphate oxidising agent and heavy metal ions, particularly silver, copper and zinc, and can be used to disinfect recycled pool water and post-treatment of industrial waste water. The water disinfection method includes treating said water with an oxidising agent and copper and silver ions obtained by dissolving salts thereof, after which the water is held for 0.5-2 hours. Zinc ions are optionally used. The oxidising agent used is 0.2-0.4% aqueous sodium persulphate solution, which is added to the water simultaneously with copper, silver and zinc salt solutions until achieving the following concentrations thereof in the water: sodium persulphate 1-5 mg/l; silver ions 0.02-0.05 mg/l; copper ions 0.07-1.0 mg/l; zinc ions 3.0-5.0 mg/l. Water treatment is carried out at 10-25°C.

EFFECT: invention provides water disinfection and prevents repeated bacterial infection of the water for a long period of time.

1 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: invention relates to water treatment and particularly to complex water treatment. Raw water is first passed through a module of centrifugal filters 3 with electromagnetic elements, after which the water is fed into a storage container 4 while simultaneously adding a chlorine-containing preparation obtained an electrolysis cell 15 via electrolysis of table salt; the water is the fed onto an array of hollow-fibre ultrafilters 8, after which the water undergoes final treatment on a photocatalytic column 11 based on nanocrystalline titanium dioxide and ultraviolet radiation in a bactericidal module 16.

EFFECT: use of the disclosed method increases efficiency of the complex water treatment equipment one and half times without increasing dimensions thereof and operational life at least two-fold.

1 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to applied electrochemistry and can be used in medicine, as well as in cosmetology for sterilisation and disinfection. The method of activating water includes electrolysis thereof between two electrodes - an anode and a cathode, separated by a porous diaphragm, between which voltage is applied. The anode and the cathode are made from fine schungite with particle size of 10-50 mcm, placed in an envelope of fine-pore linen fabric or fabric made of cotton, and a graphite or schungite rod inserted into the fine schungite. Said envelope is attached to the rod, wherein the pore size of said envelope is not greater than the schungite particle size. The graphite or schungite anode rod, which is inserted into the schungite fine powder, is connected output terminals of the positive terminal of the voltage source; the graphite or schungite cathode rod, which is inserted into the schungite fine powder, is connected to the negative terminal of the voltage source, wherein ultrasonic vibrations whose frequency is higher than the cavitation threshold in the range from 20 kHz to 100 kHz are excited in the electrodes and the electrolysis cell, wherein intensity of said ultrasound lies in the stable cavitation range of 1.5 W/cm2 to 2.5 W/cm2.

EFFECT: method intensifies the process of producing schungite-activated water, improves purity thereof and enhances antiseptic properties of the anolyte.

1 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to chemical industry and power engineering and can be used in treatment of industrial and household wastes. The vortex layer apparatus has a removable cartridge (2) made of nonmagnetic material with inserts of ferromagnetic material, mounted in the active area of a pipe (4). The cartridge (2) is a cylinder whose ends are closed by swirl diffusers with blades (7) which overlap with each other, inside of which there is a rod (9). There are ferromagnetic particles inside the reaction chamber (6). An electromagnetic inductor (1) creates a rotating magnetic field in the working area.

EFFECT: invention improves efficiency and the quality of treating a liquid and simplifies operation of the apparatus.

3 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to water treatment at boilers and heat exchangers to remove scaling. Proposed device comprises inductors 4 arranged around pipeline 5 and made of diamagnetic material and connected to electromagnetic pulse generators. Every inductor 4 is composed of turns of electrically isolated wire 6. Electronic control unit 1 comprises two galvanically isolated four-channel electromagnetic pulse generators 2, 3 to generate forward and reverse signals. One end of wire 6 of every inductor 4 is connected to one output 8 of every said generator 2. Second end 9 of wire 6 of every inductor 4 is connected to appropriate outlet 10 of another generator of electromagnetic pulses.

EFFECT: efficient descaling, application at large-diameter pipes.

3 cl, 1 dwg

FIELD: chemistry.

SUBSTANCE: apparatus for reagentless purification and disinfection of water comprises two hydraulic cyclones 20, 21, a reactor tank 1 with an air-stripping tower 2, in the top part of which there are two ejectors 3, 4, mixing chambers of which are directed towards each other. Over the mixing chambers there is a cupola-shaped reflection shield 5, over which there is a filter cartridge 8. The reactor tank 1 is divided by two vertical perforated partition walls 9, 10 into two compartments. The first compartment 12 of the reactor tank 1 contains a settling tank 15 linked to a drainage system. The second compartment 13 of the reactor tank 1 is equipped with upper 17 and lower 18 water level sensors. The outlet of the reactor tank 1 is connected to the feed line of the water to be treated and a pipe for feeding water to the consumer. The hydraulic cyclones 20, 21 are connected to the feed line of the water to be treated and the drainage system, and through mesh filters 22, 23 to inlets of receiving chambers of the ejectors 3, 4.

EFFECT: invention increases the water/air contact area and provides further dispersion, cavitation, agitation, aeration and degassing of the treated water.

9 cl, 1 dwg

FIELD: chemistry.

SUBSTANCE: composition is also used to soften and desalinate process water, in production of synthetic detergents, in the paint industry and industry of polymer materials. The composition for producing cation-exchange fibre material consists of paraphenol sulphonic acid, formalin, basalt wool subjected to preliminary heat treatment for 1 hour at 350-450°C and microwave treatment at radiation power of 750 W for 30 s, and further contains phenol resin - a phenol production waste. The composition contains, wt %: paraphenol sulphonic acid 48.4-54.4, formalin 35.3, heat- and microwave-treated basalt wool 9.1, phenol resin 1.2-7.2.

EFFECT: composition enables synthesis of cation-exchange fibre material with an improved set of properties, particularly higher static exchange capacity and low filtrate oxidation susceptibility, and solves the problem of recycling phenol resin.

2 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to adsorption treatment of waste water. Disclosed is a method of reducing concentration of barium in water. The method includes preparing aqueous manganese oxide and mixing with barium-containing water. At pH higher than 4.8, aqueous manganese oxide acquires a negative charge and barium is adsorbed on the negatively charged surface. Manganese oxide with barium adsorbed on its surface is mixed with a flocculant. A treated output stream of water with low barium concentration is obtained after separating the formed sludge.

EFFECT: invention provides a simple technique of removing barium from waste water.

25 cl, 9 dwg, 5 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to industrial waste water treatment. Modified natural zeolite is used for treatment. The natural zeolite is modified with a solution of hexamethyldisilazane in toluene. The modified zeolite is dried successively in open air and in a muffle furnace at temperature of 110°C.

EFFECT: invention enables to obtain modified zeolite having zinc sorption capacity of 95 mg/g and nickel sorption capacity of 94 mg/g.

3 cl, 4 ex

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to environmental protection, particularly, to removal of spilled oil products from sea or lake surfaces. Absorbent, for example, peat-moss is delivered by whatever transport facility to oil spillage. Said absorbent is sprayed thereto and there above. Said peat-moss absorbs oil phase and separates it from water phase. Obtained with oil encapsulated in peat pores is collected and processed. Absorbent delivery package is composed by bag wherein said peat-moss is compacted and twisted. Said package comprises blast charge intended for its breaking to release absorbent therefrom. Absorbed oil products are collected by means of partially immersed ship drag-net, or slick bars, or oil collectors or pumps. Then, peat-moss with absorbed oil is processed to separate water mechanically or said peat is placed in bags and stored for delivery to shore for further processing.

EFFECT: perfected procedure, improved and simplified processing.

14 cl, 4 dwg

FIELD: devices for purification of household and industrial sewage.

SUBSTANCE: the invention is dealt with devices for purification of household and industrial sewage and intended for electrical and cavitational treatment of sewage containing a large quantity of organic compounds. The device for purification of sewage consists of a body made out of a dielectric material partitioned by diaphragms for two electrode chambers and one working chamber, that contains a filtering material. The electrode chambers have cavitational field sources installed and the working chamber is supplied with a the bubbler installed in it. The technical result consists in an increase of recuperation of the filtering material at the expense of application of a cavitational field to it, decrease of the microbiological semination, and an increase of cavitational effect on particles.

EFFECT: the invention ensures an increase of the filtering material recuperation, decreased microbiological semination and increased the cavitational effect on particles.

1 dwg

Up!