CN114516709A - Active mixed covering material and using method and application thereof - Google Patents
Active mixed covering material and using method and application thereof Download PDFInfo
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- CN114516709A CN114516709A CN202210157916.2A CN202210157916A CN114516709A CN 114516709 A CN114516709 A CN 114516709A CN 202210157916 A CN202210157916 A CN 202210157916A CN 114516709 A CN114516709 A CN 114516709A
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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
- C02F11/00—Treatment of sludge; Devices therefor
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/004—Sludge detoxification
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
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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
- C02F2101/105—Phosphorus 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
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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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- 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
- C02F2101/30—Organic 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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Water Treatment By Sorption (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to the technical field of water body treatment. The invention provides an active mixed covering material and a using method and application thereof, wherein the active mixed covering material comprises the following components in parts by weight: 25-35 parts of modified zeolite molecular sieve, 40-50 parts of sand, 20-30 parts of clay, 1-3 parts of calcium nitrate and 3-5 parts of calcium peroxide. According to the invention, calcium nitrate and calcium peroxide are added into materials such as molecular sieve, sand and clay, and the prepared active mixed covering material can separate bottom mud and overlying water and prevent or weaken the release of pollutants in the bottom mud. The added calcium nitrate and calcium peroxide can react with the bottom mud of the river channel, so that pollutants are effectively oxidized, and the problem of pollution of the bottom mud of the river channel is effectively solved.
Description
Technical Field
The invention relates to the technical field of water body treatment, in particular to an active mixed covering material and a using method and application thereof.
Background
The main reasons for the river pollution are endogenous pollution in the sediment, and the river sediment is complex in composition and easily affected and polluted by substances such as nitrogen, phosphorus, organic matters, heavy metals and the like. Traditional sediment covering can reduce sediment pollutant and release to the water, but can not remove the pollutant, still has the risk of pollutant release to the water. The chemical agents are put into the water body, so that the abnormal release and steady-state change of pollutants can be caused, and the biological and ecological environments in the water body are easily changed. Thus, the administration of chemical agents is generally used in emergency situations.
Therefore, how to develop a novel covering material can not only separate the bottom sediment and the overlying water, but also prevent or weaken the release of pollutants in the bottom sediment, and is very important to thoroughly solve the problem of bottom sediment pollution.
Disclosure of Invention
The invention aims to provide an active mixed covering material, a using method and application thereof, which can not only separate bottom mud and overlying water, but also achieve the purpose of preventing or weakening the release of pollutants in the bottom mud.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides an active mixed covering material which comprises the following components in parts by weight: 25-35 parts of modified zeolite molecular sieve, 40-50 parts of sand, 20-30 parts of clay, 1-3 parts of calcium nitrate and 3-5 parts of calcium peroxide.
Preferably, the active hybrid covering material comprises the following components in parts by weight: 30 parts of modified zeolite molecular sieve, 45 parts of sand, 25 parts of clay, 2 parts of calcium nitrate and 4 parts of calcium peroxide.
Preferably, the particle diameter of the sand is 0.125-0.5 mm.
The invention also provides application of the active mixed covering material in treating water body pollution.
The invention also provides application of the active mixed covering material in reducing the total nitrogen, total phosphorus or heavy metal ion content in a water body.
The invention also provides a using method of the active mixed covering material, which comprises the following steps: and paving the active mixed covering material with the thickness of 5-20 cm on the surface of the sediment.
The invention provides an active mixed covering material, a using method and application thereof, wherein the active mixed covering material comprises the following components in parts by weight: 25-35 parts of modified zeolite molecular sieve, 40-50 parts of sand, 20-30 parts of clay, 1-3 parts of calcium nitrate and 3-5 parts of calcium peroxide. According to the invention, calcium nitrate and calcium peroxide are added into materials such as molecular sieve, sand and clay, and the prepared active mixed covering material can separate bottom mud and overlying water, so that the release of pollutants in the bottom mud is prevented or weakened. The added calcium nitrate and calcium peroxide can react with the river sediment to effectively oxidize pollutants, thereby effectively solving the problem of river sediment pollution. The invention adopts the clay and fine sand weight-increasing particle technology, i.e. the molecular sieve, the fine sand and the clay are mixed to be used as an active mixed covering material. The composite material has larger specific surface area, rich pore channel structure, more oxygen-containing functional groups and larger cation exchange capacity, can effectively inhibit N and P in the sediment from releasing to the overlying water, and reduces the content of As and Cd in the biologically effective state in the river sediment.
Detailed Description
The invention provides an active mixed covering material which comprises the following components in parts by weight: 25-35 parts of modified zeolite molecular sieve, 40-50 parts of sand, 20-30 parts of clay, 1-3 parts of calcium nitrate and 3-5 parts of calcium peroxide.
In the present invention, the modified zeolite molecular sieve is preferably 28 to 32 parts by weight, and more preferably 30 parts by weight.
In the invention, the sand is preferably 42 to 48 parts by weight, and more preferably 45 parts by weight.
In the present invention, the weight part of the clay is preferably 22 to 28 parts, and more preferably 25 parts.
In the present invention, the weight part of the calcium nitrate is preferably 2 parts.
In the present invention, the calcium peroxide is preferably present in an amount of 4 parts by weight.
In the invention, the particle diameter of the sand is preferably 0.15-0.4 mm, more preferably 0.2-0.35 mm, and still more preferably 0.25-0.3 mm.
The invention also provides application of the active mixed covering material in treating water body pollution.
The invention also provides application of the active mixed covering material in reducing the total nitrogen, total phosphorus or heavy metal ion content in a water body.
The invention also provides a using method of the active mixed covering material, which comprises the following steps: spreading the active mixed covering material with the thickness of 5-20cm on the surface of the sediment.
In the invention, the modified zeolite molecular sieve has good adsorption on N and P in the bottom mud; the modified zeolite molecular sieve is rich in oxygen-containing functional groups and rich pore channel structures, and has a good adsorption and fixation effect on heavy metals.
In the present invention, the calcium nitrate has the following advantages: firstly, organic matters are oxidized, and after the organic matters are put into a river channel, the activity of microorganisms can be activated by nitrate ions, so that the decomposition efficiency of organic carbon is improved; ② the release of phosphorus is effectively inhibited because the nitrate ions can oxidize ferrous ions in the bottom mud into iron ions, and the nitrate ions can also improve the phosphorus adsorption of organic matters.
In the invention, the calcium peroxide has strong oxidizing property, can change the form of heavy metal, and has strong alkali property to generate chemical precipitation with the heavy metal.
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
1) And collecting bottom mud with the depth of 30cm at the bottom of the kame river at the periphery of the south of the river to carry out an indoor bottom mud coverage simulation experiment. Loading the uniformly mixed bottom mud into 2 reactors with the diameter of 5cm and the height of 30cm, wherein the thickness of the loaded bottom mud is 3cm, and numbering the bottom mud into a test group and a control group respectively;
2) Weighing raw materials according to the weight ratio of 30 parts of modified zeolite molecular sieve, 45 parts of sand with the diameter of 0.3mm, 25 parts of clay, 2 parts of calcium nitrate and 4 parts of calcium peroxide, mixing to obtain an active mixed covering material, and uniformly paving the active mixed covering material with the thickness of 15cm on the surface of the bottom mud of the test group;
3) respectively adding equivalent deionized water into a test group and a control group, ensuring the water level to be unchanged in the test process, and preventing disturbance of a covering and bottom mud in the deionized water adding process;
4) the experiment is carried out for 60 days, water is taken from the reactor by a siphon method every 10 days, and index changes such As the pH value, total phosphorus, total nitrogen, As and Cd contents of a water sample are monitored.
And (3) test results:
the blank control group without the covering material gradually increases the total nitrogen concentration in the covering water body in 1-10 days, the experimental group with the covering material has a certain inhibition effect on the total nitrogen release of the sediment in the first 10d, and the inhibition effect changes after 10 d: the inhibiting effect of the molecular sieve, the sand and the clay material is most obvious, and the total nitrogen concentration of the overlying water body is reduced by 86.5 percent compared with that of a blank control in the 1 st month of covering, so that the inhibiting effect on the total nitrogen release of the sediment is shown. The inhibition effect of the molecular sieve on the total nitrogen in the experiment lasts to 40 days, and the inhibition effect is weakened at the later stage of the experiment, wherein the main reason is that the physical adsorption performance of the molecular sieve is saturated.
The total phosphorus concentration in the overlying water of the blank control group without the covering material is gradually increased, the inhibiting effect of the modified zeolite molecular sieve, the sand and the clay is better, after the experimental period of 60d is finished, the total phosphorus concentration in the overlying water is reduced by 82.3 percent compared with that of the blank control group, and the average TP reduction effect reaches 62.7 percent. Through analysis, the covering material contains rich molecular sieve components, wherein the molecular sieve components have stronger adsorption performance, and the smaller the particle size is, the stronger the adsorption performance is, the phosphorus nutrient salt can be effectively bound, and the release of phosphorus pollutants from the bottom mud can be prevented. The fine sand can also effectively prevent the P nutrient salt in the bottom mud from being released to the overlying water, and the molecular sieve has a slightly excellent effect.
The molecular sieve and the fine sand have good fixing effect on heavy metals in the bottom mud. After 30d, the total As and Cd concentration in the covering material repairing treatment is reduced to 56 percent; as and Cd in the overburden water are also generally reduced.
Example 2
1) And collecting bottom mud with the depth of 60cm at the bottom of the Saglume river at the periphery of the south of Henan to perform an indoor bottom mud coverage simulation experiment. Loading the uniformly mixed bottom mud into 2 reactors with the diameter of 5cm and the height of 30cm, wherein the thickness of the loaded bottom mud is 3cm, and numbering the bottom mud into a test group and a control group respectively;
2) weighing the raw materials according to the weight ratio of 25 parts of modified zeolite molecular sieve, 40 parts of sand with the diameter of 0.5mm, 20 parts of clay, 1 part of calcium nitrate and 3 parts of calcium peroxide, mixing to obtain an active mixed covering material, and uniformly paving the active mixed covering material with the thickness of 5cm on the surface of the bottom mud of the test group;
3) Respectively adding equivalent deionized water into a test group and a control group, ensuring the water level to be unchanged in the test process, and preventing disturbance of a covering and bottom mud in the deionized water adding process;
4) the experiment is carried out for 60 days, water is taken from the reactor by a siphon method every 10 days, and index changes such As the pH value, total phosphorus, total nitrogen, As and Cd contents of a water sample are monitored.
And (3) test results:
the blank control group without the covering material gradually increases the total nitrogen concentration in the covering water body in 1-10 days, the experimental group with the covering material has a certain inhibition effect on the total nitrogen release of the sediment in the first 10d, and the inhibition effect changes after 10 d: the inhibition effect of the molecular sieve, the sand and the clay material is most obvious, and the total nitrogen concentration of the overlying water body is reduced by 80 percent compared with that of a blank control in the 1 st month of covering, so that the inhibition effect on the total nitrogen release of the bottom sludge is shown. The inhibition effect of the molecular sieve on the total nitrogen in the experiment lasts to 40 days, and the inhibition effect is weakened at the later stage of the experiment, wherein the main reason is that the physical adsorption performance of the molecular sieve is saturated.
The total phosphorus concentration in the overlying water of the blank control group without the covering material is gradually increased, the inhibition effect of the molecular sieve, the sand and the clay is better, after the experimental period of 60d is finished, the total phosphorus concentration in the overlying water is reduced by 56.0 percent compared with that of the blank control group, and the average TP reduction effect reaches 62.7 percent. Through analysis, the covering material contains rich molecular sieve components, wherein the molecular sieve components have stronger adsorption performance, and the smaller the particle size is, the stronger the adsorption performance is, the phosphorus nutrient salt can be effectively bound, and the phosphorus pollutants can be prevented from being released from the bottom mud. The fine sand can also effectively prevent the P nutrient salt in the bottom mud from being released upwards by covering water, and the molecular sieve has slightly excellent effect.
The molecular sieve and the fine sand have good fixing effect on heavy metals in the bottom mud. After 30 days, the concentration of total As and Cd in the covering material repair treatment is reduced to 24.6%; as and Cd in overlying water also generally decreases.
Example 3
1) And collecting bottom mud with the depth of 10cm from the bottom of the sand glumes river at the periphery of the south of the river to carry out an indoor bottom mud coverage simulation experiment. Loading the uniformly mixed bottom mud into 2 reactors with the diameter of 5cm and the height of 30cm, wherein the thickness of the loaded bottom mud is 3cm, and numbering the bottom mud into a test group and a control group respectively;
2) weighing raw materials according to the weight ratio of 35 parts of modified zeolite molecular sieve, 50 parts of sand with the diameter of 0.5mm, 30 parts of clay, 3 parts of calcium nitrate and 5 parts of calcium peroxide, mixing to obtain an active mixed covering material, and uniformly paving the active mixed covering material with the thickness of 20cm on the surface of the bottom mud of the test group;
3) respectively adding equivalent deionized water into a test group and a control group, ensuring the water level to be unchanged in the test process, and preventing disturbance of a covering and bottom mud in the deionized water adding process;
4) the experiment is carried out for 60 days, water is taken from the reactor by a siphon method every 10 days, and index changes such As the pH value, total phosphorus, total nitrogen, As and Cd contents of a water sample are monitored.
And (3) test results:
The blank control group without the covering material gradually increases the total nitrogen concentration in the covering water body in 1-10 days, the experimental group with the covering material has a certain inhibition effect on the total nitrogen release of the sediment in the first 10d, and the inhibition effect changes after 10 d: the inhibition effect of the molecular sieve, the sand and the clay material is most obvious, the total nitrogen concentration of the overlying water body is reduced by 83 percent compared with that of a blank control in the 1 st month of covering, and the inhibition effect on the total nitrogen release of the bottom sludge is better. The inhibition effect of the molecular sieve on the total nitrogen in the experiment lasts to 40 days, and the inhibition effect is weakened at the later stage of the experiment, wherein the main reason is that the physical adsorption performance of the molecular sieve is saturated.
The total phosphorus concentration in the overlying water of the blank control group without the covering material is gradually increased, the inhibiting effect of the modified zeolite molecular sieve, the sand and the clay is better, after the experimental period of 60d is finished, the total phosphorus concentration in the overlying water is reduced by 69.2 percent compared with that of the blank control group, and the average TP reduction effect reaches 62.7 percent. Through analysis, the covering material contains rich molecular sieve components, wherein the molecular sieve components have stronger adsorption performance, and the smaller the particle size is, the stronger the adsorption performance is, the phosphorus nutrient salt can be effectively bound, and the phosphorus pollutants can be prevented from being released from the bottom mud. The fine sand can also effectively prevent the P nutrient salt in the bottom mud from being released upwards by covering water, and the molecular sieve has slightly excellent effect.
The molecular sieve and the fine sand have good fixing effect on heavy metals in the bottom mud. After 30 days, the concentration of total As and Cd in the covering material repair treatment is reduced to 40.3%; as and Cd in overlying water also generally decreases.
From the above examples, it can be seen that the present invention provides an active hybrid covering material, method of use and use thereof, comprising the following components in parts by weight: 25-35 parts of modified zeolite molecular sieve, 40-50 parts of sand, 20-30 parts of clay, 1-3 parts of calcium nitrate and 3-5 parts of calcium peroxide. According to the invention, calcium nitrate and calcium peroxide are added into materials such as molecular sieve, sand and clay, and the prepared active mixed covering material can separate bottom mud and overlying water and prevent or weaken the release of pollutants in the bottom mud. The added calcium nitrate and calcium peroxide can react with the bottom mud of the river channel, so that pollutants are effectively oxidized, and the problem of pollution of the bottom mud of the river channel is effectively solved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. The active mixed covering material is characterized by comprising the following components in parts by weight: 25-35 parts of modified zeolite molecular sieve, 40-50 parts of sand, 20-30 parts of clay, 1-3 parts of calcium nitrate and 3-5 parts of calcium peroxide.
2. The active hybrid cover material according to claim 1, characterized by comprising the following components in parts by weight: 30 parts of modified zeolite molecular sieve, 45 parts of sand, 25 parts of clay, 2 parts of calcium nitrate and 4 parts of calcium peroxide.
3. The active hybrid cover material of claim 2, wherein the sand has a particle diameter of 0.125 to 0.5 mm.
4. Use of the active hybrid covering material of any one of claims 1 to 3 for the remediation of water pollution.
5. Use of the reactive hybrid cover material of any one of claims 1 to 3 for reducing the total nitrogen, total phosphorus or heavy metal ion content in a body of water.
6. The method of using the active hybrid cover material of any one of claims 1 to 3, wherein the method of using is: and paving the active mixed covering material with the thickness of 5-20 cm on the surface of the sediment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210157916.2A CN114516709A (en) | 2022-02-21 | 2022-02-21 | Active mixed covering material and using method and application thereof |
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| CN202210157916.2A CN114516709A (en) | 2022-02-21 | 2022-02-21 | Active mixed covering material and using method and application thereof |
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Citations (7)
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| ES345146A1 (en) * | 1966-09-19 | 1968-11-16 | Pullman Inc | Cyclic process for removal of acid radicals from aqueous media using lead oxide or basic lead carbonate |
| CN101412572A (en) * | 2008-11-17 | 2009-04-22 | 南开大学 | In-situ covering method for heavy metal in nano agustite immobilized sediment |
| CN102674646A (en) * | 2012-05-21 | 2012-09-19 | 上海海洋大学 | In-situ restoring method of bottom mud polluted by surface water body |
| EP2657197A1 (en) * | 2010-12-24 | 2013-10-30 | Boying Xiamen Science And Technology Co., Ltd. | Tanning wastewater treatment and reuse apparatus and method therefor |
| CN107486139A (en) * | 2017-10-10 | 2017-12-19 | 成都理工大学 | Original position covering suppresses the function soil and its application method of black and odorous water sedimentary phosphate release |
| CN110776222A (en) * | 2019-09-19 | 2020-02-11 | 北京化工大学 | Preparation and application of sediment nitrogen and phosphorus fixing and repairing agent |
| CN112592013A (en) * | 2020-11-25 | 2021-04-02 | 武汉理工大学 | Black odorous river sludge bottom modifying agent and preparation and use methods thereof |
-
2022
- 2022-02-21 CN CN202210157916.2A patent/CN114516709A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES345146A1 (en) * | 1966-09-19 | 1968-11-16 | Pullman Inc | Cyclic process for removal of acid radicals from aqueous media using lead oxide or basic lead carbonate |
| CN101412572A (en) * | 2008-11-17 | 2009-04-22 | 南开大学 | In-situ covering method for heavy metal in nano agustite immobilized sediment |
| EP2657197A1 (en) * | 2010-12-24 | 2013-10-30 | Boying Xiamen Science And Technology Co., Ltd. | Tanning wastewater treatment and reuse apparatus and method therefor |
| CN102674646A (en) * | 2012-05-21 | 2012-09-19 | 上海海洋大学 | In-situ restoring method of bottom mud polluted by surface water body |
| CN107486139A (en) * | 2017-10-10 | 2017-12-19 | 成都理工大学 | Original position covering suppresses the function soil and its application method of black and odorous water sedimentary phosphate release |
| CN110776222A (en) * | 2019-09-19 | 2020-02-11 | 北京化工大学 | Preparation and application of sediment nitrogen and phosphorus fixing and repairing agent |
| CN112592013A (en) * | 2020-11-25 | 2021-04-02 | 武汉理工大学 | Black odorous river sludge bottom modifying agent and preparation and use methods thereof |
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