KR20080042788A - Carrier and the process for purify a heavy metal waste water or sewage - Google Patents

Abstract

A manufacturing method of an immobilized carrier for treatment of heavy metal-containing mine wastewater and sewage or wastewater is provided to improve treatment efficiency of heavy metals by forming the carrier from activated carbon, white charcoal, clinoptilolite, mordenite, granite porphyry and alkaline silicate, and retain a porous foamed space of the carrier for long time and substantially increase purification efficiency by reinforcing durability of the carrier. A manufacturing method of an immobilized carrier for treatment of heavy metal-containing mine wastewater and sewage or wastewater comprises: a first mixing step(S1) of mixing 10 to 20 wt.% of anthracite, 20 to 30 wt.% of activated carbon, and 30 to 36 wt.% of white charcoal to obtain a first composition of a powder form; a heating step(S2) of washing the first composition, and heating and drying the washed first composition to evaporate water from the first composition; a drying step(S3) of washing the first composition with a nitric acid solution, and naturally drying the washed first composition to evaporate water from the first composition; a second mixing step(S4) of mixing the first composition with 7 to 15 wt.% of clinoptilolite, 7 to 15 wt.% of mordenite, 2.5 to 7.5 wt.% of granite porphyry, and 5 to 15 wt.% of alkaline silicate to obtain a second composition; a processing step(S5) of processing the second composition into a specific form through a molding device; and a sintering step(S6) of sintering the second composition at a temperature of 800 to 900 deg.C for 5 to 7 hours through a sintering furnace.

Description

Immobilized dyes for the treatment of heavy metal-containing mine wastewater and sewage and wastewater (Methods for manufacturing immobilized dyes and its CAPH) {carrier and the process for purify a heavy metal waste water or sewage}

The present invention relates to an immobilized tin for the treatment of heavy metal-containing mine wastewater and sewage and wastewater, and to a method of manufacturing the same. The present invention is excellent in purifying heavy metals even in strong acidic wastewater, and breaks the porous foam space that forms a specific surface area by impact. Anthracite, active carbon, white charcol, Clinoptilolite, Mordenite, Granite porphyry, Alkaline Silicate The present invention relates to an immobilized tin for heavy metal-containing mine wastewater and sewage and wastewater treatment, and a method of manufacturing the same.

Wastewater containing heavy metals, which is the main purpose of the present invention, emits more than 2,000,000 tons in a wide range of industrial and military facilities such as mines, electroplating facilities, construction sites, transportation facilities, and electrical industry facilities. It is flowing into four rivers and other rivers.

 Wastewater introduced into the stream is again pointed out as a main culprit of water pollution and drinking water pollution by being introduced into the river as well as soil and groundwater.

In addition, positive ion heavy metals such as copper and lead contained in various wastewaters are adsorbed on the adsorption medium as the pH increases during the adsorption reaction with the metal (water) oxides, which are adsorption media in the soil, resulting in higher acidity. Acidic cationic heavy metals are not easily removed by metal (aqueous) oxides, which are adsorptive media in the soil.

Cationic heavy metals that are not absorbed by the above adsorption medium move along the stream and groundwater streams to increase the heavy metal contamination of groundwater, rivers and soils.

As described above, many studies have been conducted to remove heavy metals contained in wastewater, and the methods that have been put to practical use or being studied so far are flocculation sedimentation, ion exchange, adsorption, redox, electrolysis, neutralization and extraction. Physicochemical treatment methods such as these are mainly used.

Adsorption method is composed of various kinds of natural or synthetic adsorbents such as metal oxide, activated carbon, fly ash, peat, activated sludge, waste sludge, biosorbent, etc. The tin is being studied in various fields, and the active carbon is processed into a single material for the purpose of removing heavy metals contained in water.

As described in the background art, activated carbon tin for wastewater prepared for the purpose of removing heavy metals contained in water by adsorption has a problem of low heavy metal treatment efficiency itself.

Furthermore, there is a problem in that the porous foam space forming the specific surface area is damaged due to the weak impact and the flow rate of the waste water, and the surface is damaged or worn, and the purification efficiency for purifying heavy metals contained in the waste water of high pH concentration is very low.

The present invention is 10 to 20% by weight of anthracite coal and 20 to 30% by weight activated carbon, 30 to 36% by weight of white coal, 7 to 15% by weight of crinotyrolite, 7 to 15% of mordenite Immobilized tin for heavy metal-containing mine wastewater and sewage / wastewater treatment consisting of 5% by weight to 15% by weight of Granite Popphyli, 2.5% to 7.5% by weight of granite popli.

And a first mixing step of mixing and refining 10% to 20% by weight of anthracite coal, 20% to 30% by weight of activated carbon, and 30% to 36% by weight of white coal to obtain a first composition in powder form; A heating step of washing the first composition after the first mixing step and heating and drying the water so that the moisture absorbed by the washed first composition is evaporated; After the heating step, the first composition is washed with the nitric acid solution again, and the drying step of natural drying so that the water absorbed by the washed first composition is evaporated; After the drying step, 7 wt% to 15 wt% of chrynophthyrolite and 7 wt% to 15 wt% of mordenite, 2.5 wt% to 7.5 wt% of granite pophili, and alkali silicate 5 in the first composition A second mixing step of obtaining a second composition by mixing by weight to 15% by weight; A processing step of processing the second composition into a specific form through a molding apparatus after the second mixing step; After the processing step, the sintering step of sintering the second composition at a temperature of 800 ℃ to 900 ℃ 5 hours to 7 hours through the sintering furnace, characterized in that the immobilization for the treatment of heavy metal-containing mine wastewater and sewage and waste water The manufacturing method of a tin is regarded as the problem solving means of this invention.

The present invention is composed of activated charcoal, white charcoal, crinophthyrolite, moldenite, granite popli, and alkali silicate, and thus the heavy metal treatment efficiency itself is high.

In addition, the durability is enhanced, so that the surface is not damaged or worn due to weak impact and wastewater flow rate, so that the porous foam space forming the specific surface area is maintained for a long time, and the purification efficiency for purifying heavy metal contained in the wastewater of high pH concentration is greatly improved. There is a rising effect.

The present invention is excellent in the effect of purifying heavy metals contained in the strong acid waste water, 10% to 20% by weight of anthracite coal and 20% to 30% by weight of activated carbon, so as not to break the porous foam space forming a specific surface area by impact, etc. %, 30% to 36% by weight of charcoal, 7% to 15% by weight of Crinotrophyrite, 7% to 15% by weight of mordenite, 2.5% to 7.5% by weight of granite popil and 5% of alkali silicate The present invention relates to an immobilized tin for heavy metal-containing mine wastewater and sewage / wastewater treatment composed of% to 15% by weight.

The method for producing an immobilized tin for the treatment of heavy metal-containing mine wastewater and sewage and wastewater of the present invention comprises mixing and refining anthracite coal 10 wt% to 20 wt%, activated carbon 20 wt% to 30 wt%, and white coal 30 wt% to 36 wt%. A first mixing step of obtaining a first composition in powder form (S1); A heating step of washing the first composition after the first mixing step and heating and drying the water to absorb the water absorbed by the washed first composition (S2); After the heating step, the first composition is washed with the nitric acid solution again, the drying step of natural drying to evaporate the water absorbed by the washed first composition (S3); After the drying step, 7 wt% to 15 wt% of chrynophthyrolite and 7 wt% to 15 wt% of mordenite, 2.5 wt% to 7.5 wt% of granite pophili, and alkali silicate 5 in the first composition A second mixing step of obtaining a second composition by mixing by weight to 15% by weight (S4); After the second mixing step, the processing step of processing the second composition in a specific form through a molding apparatus (S5); After the processing step, the sintering step (S6) for sintering the second composition at a temperature of 800 ℃ to 900 ℃ 5 hours to 7 hours through a sintering furnace is composed of largely six steps.

Hereinafter, with reference to the accompanying drawings through an embodiment of the present invention will be described in more detail.

1 is a diagram illustrating a manufacturing method of the present invention.

First, the first mixing step (S1) is 10% to 20% by weight of powdered anthracite coal in granule (granulite) form and 20% to 30% by weight of powdered activated carbon in granule (granulite) form and granulite form 30 wt% to 36 wt% of powdered white charcoal is mixed and refined in the form of a first composition to form a first composition.

Second, the heating step (S2) is washed 10 to 20 times with clear water to remove the foreign substances on the surface of the first composition after the first mixing step, the water absorbed by the first composition in the washing process It consists of drying by heating for 7 hours to 11 hours at a temperature of 100 ℃ or more to evaporate.

Third, the drying step (S3) is washed with the nitric acid solution again 5 times to 11 times to the first composition after the heating step, and the natural water for 30 to 70 hours so that the water absorbed by the first composition is evaporated by the washing process. It consists of drying.

Fourth, the second mixing step (S4) is 7% by weight to 15% by weight of Crinotropyrite in powder form and 7% by weight to 15% by weight in the form of powder in the first composition after the drying step, powder form 2.5 wt% to 7.5 wt% of granite pophyli and 5 wt% to 15 wt% of alkali silicate in powder form, followed by forming a second composition in powder form.

The above Crinophthyrolite and mordenite are a kind of zeolite, and the selective ion exchange characteristics of the Crinophthyrolite and the mordenite in the present invention is a hard water in which many inorganic salts (main components magnesium and calcium ions) are dissolved. It has the property of softening.

In addition, Crynovtirolite forms various mineral phases in the crystallographic and exchangeable cationic nature of zeolite, and is reduced to weak alkalinity and serves as a cation exchanger to stabilize calcium ions.

In addition, Crinoftyrolite and Mordenite have a large amount of water around the cations in the structural cavity, but are easily dehydrated depending on the external temperature and pressure.

In particular, dehydrated Clinopthyrolite and mordenite have excellent selective adsorption to selectively separate different molecules by selectively adsorbing inorganic and organic molecules of suitable size and shape.

As above, Clinoftyrolite has a role of adsorption of heavy metal ions and radioactive materials with a cavity size of about 4-5Å, and mordenite has a size of 6-7Å of hydrogen sulfide (H₂S), heavy metal ions and radioactivity. Adsorbs and deodorizes the material.

In addition, mordenite has excellent adsorption and molecular sieve properties because of its relatively good surface activity, large crystal voids, and high thermal stability among zeolites, and serves to provide inorganic salts (for example, calcium ions) that are not present in other minerals.

In addition, the granite poppies assist the role of the first composition, and play a role of activating a living body due to radiation of far infrared rays and anions, providing inorganic salts, and removing heavy metals by adsorption.

Finally, the alkali silicate serves to bind the anthracite activated carbon, white coal Crinophtyrolite, molddenite and granite pophyli.

Fifth, the processing step (S5) consists of processing the second composition passed through the second mixing step (S2) in the shape of a square, triangle and circle through a molding apparatus.

Sixth, the sintering step (S6) consists of sintering the second composition formed in a specific shape by the processing step at a temperature of 800 ℃ to 900 ℃ 5 hours to 7 hours using a sintering furnace.

Through the manufacturing method as described above, the wastewater treatment tines formed in various shapes have a high effect of the heavy metal treatment efficiency itself, and the durability is enhanced, so that the surface of the tint is not damaged or worn with a weak impact and wastewater flow rate, so that the specific surface area is reduced. The porous foam space to be formed is maintained, and the purification efficiency for purifying heavy metals at a high pH concentration of the waste water is greatly increased.

[Example]

First, 150 g of anthracite coal in powder form, 150 g of powdered activated carbon, and 330 g of powdered charcoal are mixed and refined with a mixer to form a first composition in powder form. do.

Thereafter, the first composition passed through the first mixing step (S1) is washed 12 times with clear water, followed by a heating step (S2) of heating at 150 ° C. for 9 hours to remove foreign substances on the surface of the first composition. Acquire.

The first composition passed through the heating step (S2) was washed again with the nitric acid solution eight times, the drying step (S3) to dry naturally for 50 hours, the first foreign material formed in the heating step (S2) is removed Obtain the composition.

And a second mixture of 110 g of chlorinothyrolite in powder form, 110 g in powder form, 110 g in powder form, 50 g of granite porphyll in powder form, and 100 g of alkali silicate in powder form in the first composition after the drying step (S3). Proceed with the mixing step (S4), to obtain a second composition in the form of a powder again.

Thereafter, the second composition passed through the second mixing step (S4) is processed in a circular shape by using an extrusion molding apparatus (S5) to obtain a second composition processed in a circular shape.

Finally, the sintering step (S6) of heating the second composition formed in a specific shape by the processing step (S5) for 6 hours at a temperature of 850 ℃ using a sintering furnace, the sintered heavy metal-containing mine wastewater and Acquire immobilized tin for sewage and wastewater treatment.

The present invention configured as described above defines three types of samples as group A, the amount of components contained in the sample after purification through a purification apparatus in which activated carbon is applied, and the same sample as the group A as group B, As Table 1 compares the amount of the components contained in the sample after purification through the purification device according to the invention,

TABLE 1

  Ingredient / Group  A group  B group  First sample  Second sample  Third sample  First sample  Second sample  Third sample  pH (PPM)  3.34  3.53  3.44  3.34  3.53  3.44  COD (mg / L)  10.58  7.5  15.28  0.21  0.075  0.15  Aluminum (mg / l)  19  15  14.8  0.38  0.15  0.44  Cadmium (mg / l)  0.22  0.24  0.25  0.008  0.009  0.013  Copper (mg / l)  4  3  5  0.6  0.12  0.1  Arsenic (mg / l)  0.489  0.191  0.21  0.04  0.026  0.27  Iron (mg / l)  149  202  221  1.49  4.04  11.05  Manganese (mg / ℓ)  59  79  82  4.13  5.53  16.4  Zinc (mg / l)  14  27  29  0.28  3.51  1.16  Calcium (mg / L)  394  476  484  3.94  66.64  16.94  Magnesium (mg / l)  142  174  178  18.46  12.18  5.7

As the heavy metal treatment efficiency itself has a high effect, and mixed and dried in powder form, mixed and dried again, the Mohs hardness is improved to 7 or more to maintain a porous foam space to form a specific surface area, high waste water Even at pH concentration, the treatment to clean heavy metals is maintained, and the treatment efficiency to purify heavy metals contained in wastewater is greatly increased.

1 is a process diagram of the present invention.

Claims (3)

In the wastewater treatment tin containing heavy metal, 10% to 20% by weight of anthracite coal, 20% to 30% by weight of activated carbon, 30% to 36% by weight of charcoal, 7% to 15% by weight of crinophthyriteite, 7% to 15% by weight of mordenite, Immobilized tin for heavy metal-containing mine wastewater and sewage / wastewater treatment consisting of 2.5 wt% to 7.5 wt% of granite popphyli and 5 wt% to 15 wt% of alkali silicate. The method of claim 1, Immobilized tin for heavy metal-containing mine wastewater and sewage and wastewater treatment, characterized by consisting of 70% to 90% by weight of white coal and 10% to 20% by weight of alkali silicate. In the manufacturing method of the waste water treatment tin, A first mixing step of mixing and refining 10% to 20% by weight of anthracite coal, 20% to 30% by weight of activated carbon, and 30% to 36% by weight of white coal to obtain a first composition in powder form; A heating step of washing the first composition after the first mixing step and heating and drying the water to absorb the water absorbed by the washed first composition; After the heating step, the first composition is washed with the nitric acid solution again, the drying step of natural drying so that the water absorbed by the washed first composition evaporates; After the drying step, 7 wt% to 15 wt% of chrynophthyrolite and 7 wt% to 15 wt% of mordenite, 2.5 wt% to 7.5 wt% of granite pophili, and alkali silicate 5 in the first composition A second mixing step of obtaining a second composition by mixing by weight to 15% by weight; A processing step of processing the second composition into a specific form through a molding apparatus after the second mixing step; After the processing step, the sintering step of sintering the second composition at a temperature of 800 ℃ to 900 ℃ 5 hours to 7 hours through the sintering furnace, characterized in that the immobilization for the treatment of heavy metal-containing mine wastewater and sewage and waste water Method of making tin

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