CN111039454A - Industrial water purifying agent - Google Patents
Industrial water purifying agent Download PDFInfo
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- CN111039454A CN111039454A CN201911346500.XA CN201911346500A CN111039454A CN 111039454 A CN111039454 A CN 111039454A CN 201911346500 A CN201911346500 A CN 201911346500A CN 111039454 A CN111039454 A CN 111039454A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/103—Arsenic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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Abstract
The invention belongs to the technical field of industrial water purifying agents, and particularly relates to an industrial water purifying agent which comprises the following components in parts by weight: the cleaning agent comprises 2-3 parts of sodium sulfide, 30-40 parts of ferric oxide, 50-70 parts of sodium silicate, 50-70 parts of aluminum chloride, 20-30 parts of activated carbon powder, 2-3 parts of diatomite and 10-15 parts of macroporous resin.
Description
Technical Field
The invention belongs to the technical field of industrial water purifying agents, and particularly relates to an industrial water purifying agent.
Background
Along with the continuous development of industrial technology, the discharge amount of industrial wastewater is gradually increased, and most of industrial wastewater is different from domestic wastewater in that industrial wastewater not only contains industrial waste residues, but also often contains heavy metal substances harmful to the environment, and polyaluminium chloride in an inorganic high-molecular water purifying agent is widely used, but the polyaluminium chloride has small floc and is fragile in actual water purification, small flocs can enter the filtered water through the filter layer, the water quality of the effluent is reduced, the settling speed of the small flocs is low, the load of the combination of a settling pond and the back flushing of the filter layer is increased, the comprehensive cost is improved, the flocculation capacity of the comprehensive aluminum chloride is seriously reduced or even disappears at low temperature and low turbidity, and the residual heavy metal content in the water after the polyaluminium chloride treatment is still high, secondary treatment is needed, and the treatment difficulty is greatly increased, so that the prior art needs further improvement.
Disclosure of Invention
The invention aims to provide an industrial water purifying agent which has stable quality and good effect of removing heavy metals.
An industrial water purifying agent comprises the following components in parts by weight: comprises 2-3 parts of sodium sulfide, 30-40 parts of ferric oxide, 50-70 parts of sodium silicate, 50-70 parts of aluminum chloride, 20-30 parts of activated carbon powder, 2-3 parts of diatomite and 10-15 parts of macroporous resin.
Further, the industrial water purifying agent consists of the following components in parts by weight: the composite material comprises 2 parts of sodium sulfide, 30 parts of ferric oxide, 50 parts of sodium silicate, 50 parts of aluminum chloride, 20 parts of activated carbon powder, 2 parts of diatomite and 10 parts of macroporous resin.
Further, the industrial water purifying agent consists of the following components in parts by weight: the composite material comprises 2.5 parts of sodium sulfide, 35 parts of ferric oxide, 60 parts of sodium silicate, 60 parts of aluminum chloride, 25 parts of activated carbon powder, 2.5 parts of diatomite and 12 parts of macroporous resin.
Further, the industrial water purifying agent consists of the following components in parts by weight: the composite material comprises 3 parts of sodium sulfide, 40 parts of ferric oxide, 70 parts of sodium silicate, 70 parts of aluminum chloride, 30 parts of activated carbon powder, 3 parts of diatomite and 15 parts of macroporous resin.
A water purification method using the water purifying agent, comprising the steps of:
(1) adding a purifying agent into the sewage, filtering the sewage by using a filter screen to remove solid pollutants, adding first sulfuric acid into the filtered sewage, stirring for 2-4h at 600r/min for 500 plus materials, then adding second sulfuric acid, stirring for 3-4h at 600r/min for 400 plus materials, stirring for 2-3h, performing curing treatment for 2-3h, filtering, and taking a filtrate;
(2) and (2) ageing the filtrate obtained in the step (1), adding NAOH to adjust the pH value to 7, and filtering by using activated carbon to obtain purified water.
Further, the mass-volume ratio of the sewage, the primary sulfuric acid, the secondary sulfuric acid and the purifying agent in the step (1) is 100-200L: 4-6 mL: 10-20 mL: 50-70 g.
Further, the mass percent of the sulfuric acid is 50-60%.
The invention firstly uses a filter screen to remove solid pollutants, then sulfuric acid is added into the filtered pollutants to dissolve out acid-soluble and water-soluble substances in the sewage, sodium sulfide is used as a reducing agent to reduce heavy metal substances in the solution, the heavy metal substances in the sewage are flocculated after the reaction of ferric oxide, sodium silicate and aluminum chloride, and the purified water is obtained by adsorption and filtration of activated carbon powder, diatomite and macroporous resin.
Drawings
FIG. 1 is a graph showing the turbidity removal rate in test example 1.
Detailed Description
Example 1:
an industrial water purifying agent comprises the following components in parts by weight: the composite material comprises 2 parts of sodium sulfide, 30 parts of ferric oxide, 50 parts of sodium silicate, 50 parts of aluminum chloride, 20 parts of activated carbon powder, 2 parts of diatomite and 10 parts of macroporous resin.
A water purification method using the water purifying agent, which is characterized by comprising the following steps:
(1) adding a purifying agent into the sewage, filtering by using a filter screen to remove solid pollutants, adding first sulfuric acid into the filtered sewage, stirring for 2 hours at 500r/min, then adding second sulfuric acid, stirring for 3 hours at 400r/min, stirring for 2 hours, performing curing treatment for 2 hours, and filtering to obtain a filtrate;
(2) and (2) ageing the filtrate obtained in the step (1), adding NAOH to adjust the pH value to 7, and filtering by using activated carbon to obtain purified water.
The mass volume ratio of the sewage, the first sulfuric acid, the second sulfuric acid and the purifying agent in the step (1) is 100L: 4 mL: 10 mL: 50 g. The mass percent of the sulfuric acid is 50%.
Example 2:
an industrial water purifying agent comprises the following components in parts by weight: comprises 2.5 parts of sodium sulfide, 35 parts of ferric oxide, 60 parts of sodium silicate, 60 parts of aluminum chloride, 25 parts of activated carbon powder, 2.5 parts of diatomite and 12 parts of macroporous resin. .
A water purification method using the water purifying agent, which is characterized by comprising the following steps:
(1) adding a purifying agent into the sewage, filtering by using a filter screen to remove solid pollutants, adding first sulfuric acid into the filtered sewage, stirring for 3 hours at 550r/min, then adding second sulfuric acid, stirring for 3.5 hours at 500r/min, stirring for 2.5 hours, performing curing treatment for 2.5 hours, and filtering to obtain a filtrate;
(2) and (2) ageing the filtrate obtained in the step (1), adding NAOH to adjust the pH value to 7, and filtering by using activated carbon to obtain purified water.
The mass-volume ratio of the sewage, the primary sulfuric acid, the secondary sulfuric acid and the purifying agent in the step (1) is 150L: 5 mL: 15 mL: 60 g. The mass percent of the sulfuric acid is 55%.
Example 3:
an industrial water purifying agent comprises the following components in parts by weight: the composite material comprises 3 parts of sodium sulfide, 40 parts of ferric oxide, 70 parts of sodium silicate, 70 parts of aluminum chloride, 30 parts of activated carbon powder, 3 parts of diatomite and 15 parts of macroporous resin.
A water purification method using the water purifying agent, which is characterized by comprising the following steps:
(1) adding a purifying agent into the sewage, filtering by using a filter screen to remove solid pollutants, adding first sulfuric acid into the filtered sewage, stirring for 4 hours at 600r/min, then adding second sulfuric acid, stirring for 4 hours at 600r/min, stirring for 3 hours, performing curing treatment for 3 hours, and filtering to obtain a filtrate;
(2) and (2) ageing the filtrate obtained in the step (1), adding NAOH to adjust the pH value to 7, and filtering by using activated carbon to obtain purified water.
The mass-volume ratio of the sewage, the first sulfuric acid, the second sulfuric acid and the purifying agent in the step (1) is 200L: 6 mL: 20 mL: 70 g. The mass percentage of the sulfuric acid is 60%.
Test example 1:
4000ml of filtered industrial sewage solution is divided into four groups, each group is 1000ml, and the four groups of sewage are respectively added with the water purifying agent of the example 1, the example 2 and the example 3 and the polyaluminium chloride, and the first group is as follows: the purified water obtained by adding the water purifying agent of the embodiment 1 to the sewage and using the method of the embodiment 1 is a, and the second group is as follows: the water purification agent of example 2 of the present invention was added, and the purified water obtained using the method of example 2 was b, and the third group was: the water purification agent of example 3 of the present invention was added, and the purified water obtained using the method of example 3 was c, and the third group was: adding a water purifying agent of polyaluminium chloride to obtain purified water with turbidity of 50NTU, water temperature of 25 ℃ and pH of 7.13. As shown in FIG. 1, FIG. 1 shows the turbidity removal rate in different amounts of water, the mass of the added water purifying agent on the horizontal axis and the turbidity removal rate on the numerical axis.
As shown in FIG. 1, the water purifying agents of examples 1, 2 and 3 of the present invention have higher turbidity removal rates than those of the polyaluminum chloride, and the experiments show that the water purifying agents of examples 1, 2 and 3 have higher settling rates than those of the polyaluminum chloride.
The turbidity removal rate is measured by taking water samples with different addition amounts, stirring for 5min, standing, taking supernate at a position 2cm away from the upper liquid level, measuring absorbance, calculating the turbidity (NTU) of the water sample by a standard curve, and calculating the turbidity removal rate according to the following formula:
turbidity removal rate (%) - (a-b) × 100/a
a is the turbidness (NTU) of the water sample; b is the turbidity remaining (NTU) of the treated water sample.
Test example 2:
4000ml of filtered industrial sewage solution is divided into four groups, each group is 1000ml, and the four groups of sewage are respectively added with the water purifying agent of the example 1, the example 2 and the example 3 and the polyaluminium chloride, and the first group is as follows: to the wastewater was added 50g of the water purifying agent of example 1 and the purified water obtained by the method of example 1 was used, the second group being: 50g of the water purifying agent of example 2 of the present invention was added and the purified water obtained by the method of example 2 was used, and the third group was: 50g of the water purifying agent of example 3 of the present invention was added and the purified water obtained by the method of example 3 was used, and the fourth group was: purified water was obtained by adding 50g of a water purifying agent of polyaluminum chloride, and the results are shown in the following Table 1:
table 1: the removal rate of heavy metal substances in sewage is as follows:
| removal rate | Copper (Cu) | Lead (II) | Iron | Cobalt | Cadmium (Cd) | Mercury |
| First group | 62％ | 72％ | 93％ | 80％ | 96％ | 88％ |
| Second group | 65％ | 76％ | 89％ | 82％ | 99％ | 91％ |
| Third group | 63％ | 71％ | 94％ | 83％ | 97％ | 85％ |
| Fourth group | 38％ | 36％ | 34％ | 37％ | 18％ | 23％ |
Therefore, the effect of the water purifying agent prepared by the invention for removing heavy metals is better than that of polyaluminium chloride for removing heavy metals.
Test example 3:
preparing arsenic standard solutions with different concentrations, measuring fluorescence values of corresponding concentrations by using a fluorescence photometer, drawing a standard curve, taking 3000ml of industrial sewage, dividing the industrial sewage into 3 groups (1 group, 2 groups and 3 groups), adding the water purifying agent in the embodiment 1 into the group 1, adding the water purifying agent in the embodiment 2 into the group 2 and adding the water purifying agent in the embodiment 3 into the group 3, respectively adding 100ml of sulfuric acid into the group 1, 2 and 3 groups after the treatment by using the method corresponding to the arsenic standard solutions, stirring, steaming the rods on a boiling water bath, cooling, dissolving the rods in hot water, filtering and removing insoluble substances if the insoluble substances exist, transferring the rods into a 100ml volumetric flask, diluting the volumetric flask with water to scale, shaking up, measuring by using an upper fluorescence photometer, and obtaining a table 2:
the arsenic content (%) in mass percent was calculated according to the following formula:
the formula: mnThe arsenic content is checked from a standard curve, and is mu g/L;
m is the added amount of the water purifying agent, g.
Table 2:
| group 1 | 2 groups of | Group 3 | |
| As(％) | 0.000011 | 0.0000093 | 0.0000087 |
The index limit value of the drinking water is regulated according to national standard GB5749-2006 sanitary Standard for Drinking Water of the people's republic of China: arsenic is less than 0.01mg/L, and the water purifying agent and purified water prepared by the method meet the national drinking standard.
Test example 4:
preparing mercury standard solutions with different concentrations, measuring the corresponding concentration fluorescence values by using a fluorescence photometer, drawing a standard curve, taking 3000ml of industrial sewage, dividing the industrial sewage into 3 groups (1 group, 2 groups and 3 groups), adding 50g of the water purifying agent in the example 1 into the group 1, 50g of the water purifying agent in the example 2 into the group 2 and 50g of the water purifying agent in the example 3 into the group 3, respectively adding 100ml of sulfuric acid into the group (1 group, 2 groups and 3 groups) after the treatment by using the method corresponding to the mercury standard solutions, stirring, steaming on a boiling water bath, cooling, dissolving by using hot water, uniformly filtering and removing if insoluble substances exist, transferring into a 100ml volumetric flask, diluting by using water to scale, shaking, and measuring by using an upper fluorescence photometer to obtain the following table 3:
the mercury content (%) in mass percent was calculated according to the following formula:
the formula: mnThe mercury content is checked from a standard curve, and is mu g/L;
m is the added amount of the water purifying agent, g.
Table 3:
| group 1 | 2 groups of | Group 3 | |
| Hg(％) | 0.0000019 | 0.0000024 | 0.0000033 |
The index limit value of the drinking water is regulated according to national standard GB5749-2006 sanitary Standard for Drinking Water of the people's republic of China: the mercury is less than 0.001mg/L, and the water purifying agent and the purified water prepared by the invention meet the national drinking standard.
Test example 5:
in the measurement, the standard substance was prepared into a standard series of 0, 0.5. mu.g/L, 1.0. mu.g/L, 5.0. mu.g/L, 20. mu.g/L, 40. mu.g/L, 50. mu.g/L, and the standard curve of lead was drawn by starting up the measurement, and 1000ml of purified water treated in example 1 was taken as 1 group, 1000ml of purified water treated in example 2 was taken as 2 groups, 1000ml of purified water treated in example 3 was taken as 3 groups, and 30ml of water and 1ml of a nitric acid solution (1+1) were added to each group, and the mixture was covered with a petri dish for 1min, and was transferred to a 1000ml bottle after cooling to room temperature, and diluted to the scale, shaken, and subjected to the mass spectrometry by the inductive coupling plasma method, to obtain Table 4:
the lead content (%) in mass percent was calculated according to the following formula:
the formula: mnThe lead content is checked from a standard curve, and is mu g/L;
m is the added amount of the water purifying agent, g.
Table 4:
| group 1 | 2 groups of | Group 3 | |
| Pb(％) | 0.000004 | 0.000002 | 0.000003 |
The index limit value of the drinking water is regulated according to national standard GB5749-2006 sanitary Standard for Drinking Water of the people's republic of China: lead is less than 0.01mg/L, and the water purifying agent and the purified water prepared by the method meet the national drinking standard.
Test example 6:
when measured, the standard was formulated to have a concentration of 0, 0.5. mu.g/L, 1.0. mu.g/L, 5.0. mu.g/L, 20. mu.g/L, 40. mu.g/L,
a standard series of 50 mug/L, starting up for measurement, drawing a cadmium standard curve, taking 1000ml of purified water treated in the embodiment 1 as 1 group, taking 1000ml of purified water treated in the embodiment 2 as 2 groups, taking 1000ml of purified water treated in the embodiment 3 as 3 groups, respectively adding 30ml of water and 1ml of nitric acid solution (1+1) into each group, covering a surface dish for boiling for 1min, cooling to room temperature, transferring into a 1000ml volumetric flask, diluting to scale, shaking up, measuring by an inductive coupling plasma mass spectrometry
To get table 4:
the cadmium content (%) in mass percent was calculated according to the following formula:
the formula: mnThe content of cadmium is checked from a standard curve, and is mu g/L;
m is the added amount of the water purifying agent, g.
Table 5:
| group 1 | 2 groups of | Group 3 | |
| Cd(％) | 0.000004 | 0.000002 | 0.000003 |
The index limit value of the drinking water is regulated according to national standard GB5749-2006 sanitary Standard for Drinking Water of the people's republic of China: the cadmium is less than 0.01mg/L, and the water purifying agent and the purified water prepared by the method meet the national drinking standard.
Claims (7)
1. An industrial water purifying agent is characterized by comprising the following components in parts by weight: comprises 2-3 parts of sodium sulfide, 30-40 parts of ferric oxide, 50-70 parts of sodium silicate, 50-70 parts of aluminum chloride, 20-30 parts of activated carbon powder, 2-3 parts of diatomite and 10-15 parts of macroporous resin.
2. An industrial water purifying agent is characterized by comprising the following components in parts by weight: the composite material comprises 2 parts of sodium sulfide, 30 parts of ferric oxide, 50 parts of sodium silicate, 50 parts of aluminum chloride, 20 parts of activated carbon powder, 2 parts of diatomite and 10 parts of macroporous resin.
3. An industrial water purifying agent is characterized by comprising the following components in parts by weight: the composite material comprises 2.5 parts of sodium sulfide, 35 parts of ferric oxide, 60 parts of sodium silicate, 60 parts of aluminum chloride, 25 parts of activated carbon powder, 2.5 parts of diatomite and 12 parts of macroporous resin.
4. An industrial water purifying agent is characterized by comprising the following components in parts by weight: the composite material comprises 3 parts of sodium sulfide, 40 parts of ferric oxide, 70 parts of sodium silicate, 70 parts of aluminum chloride, 30 parts of activated carbon powder, 3 parts of diatomite and 15 parts of macroporous resin.
5. A water purification method using the water purifying agent of claim 1, characterized by comprising the steps of:
(1) adding a purifying agent into the sewage, filtering the sewage by using a filter screen to remove solid pollutants, adding first sulfuric acid into the filtered sewage, stirring for 2-4h at 600r/min for 500 plus materials, then adding second sulfuric acid, stirring for 3-4h at 600r/min for 400 plus materials, stirring for 2-3h, performing curing treatment for 2-3h, filtering, and taking a filtrate;
(2) and (2) ageing the filtrate obtained in the step (1), adding NAOH to adjust the pH value to 7, and filtering by using activated carbon to obtain purified water.
6. The water purifying method of claim 5, wherein the mass-to-volume ratio of the waste water, the first sulfuric acid, the second sulfuric acid and the purifying agent in step (1) is 100L: 4-6 mL: 10-20 mL: 50-70 g.
7. The method for purifying water purifying agent of claim 5, wherein the mass percentage of the sulfuric acid is 50-60%.
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Application publication date: 20200421 |