LU500188A1 - Composition for removing heavy metal cd from water, preparation method therefor, and application thereof - Google Patents
Composition for removing heavy metal cd from water, preparation method therefor, and application thereof Download PDFInfo
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- LU500188A1 LU500188A1 LU500188A LU500188A LU500188A1 LU 500188 A1 LU500188 A1 LU 500188A1 LU 500188 A LU500188 A LU 500188A LU 500188 A LU500188 A LU 500188A LU 500188 A1 LU500188 A1 LU 500188A1
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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
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic 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
- C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
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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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/62—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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
- C02F1/385—Treatment of water, waste water, or sewage by centrifugal separation by centrifuging suspensions
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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
- 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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Abstract
The present application relates to a composition for removing heavy metal Cd from water, a preparation method and an application thereof. The method comprises: metering a water-based fatty acid ethyl ester suspo-emulsion and a silicon-rich solution in a volume ratio of 1:100 to 100:1; putting the metered water-based fatty acid ethyl ester suspoemulsion and silicon-rich solution into a reaction kettle having a stirrer; performing stirring 50-100 r/min for 30 min-14 days at normal temperature to obtain the composition for removing the heavy metal Cd from water. The composition can be used for purifying natural and industrial polluted water. The final product can be separated from a water surface for combustion or serving as a diesel engine fuel. Ash generated by the process contains high-content cadmium, and can be used as a raw material for producing heavy metal cadmium; the method implements cycle industry, and is an environment-friendly method.
Description
' LU500188 COMPOSITION FOR REMOVING HEAVY METAL CD FROM WATER, PREPARATION METHOD THEREFOR, AND APPLICATION THEREOF
BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to the technical field of purification of industrial or natural water polluted by cadmium, in particular to a composition for removing heavy metal Cd from water body and its preparation method and use. The final product has a high positive effect on the removal of soluble cadmium from natural water and waste water.
Description of Related Art Cadmium (Cd) is a highly toxic substance and has toxic biological effects when the concentration is almost lower than that of any common mineral. The mechanism for cadmium- induced toxicity may be multifactorial. Cd produces toxicity by directly or indirectly affecting the functions of various systems and tissue cells, such as bones, respiratory tract and urinary, cardiovascular, gastrointestinal and nervous systems, etc... These toxic effects induce degeneration or even transmutation of the cells.
Because cadmium is widespread, easy to dissolve and transport in water has become an important cause of environmental pollution.. It is easily absorbed by aquatic organisms. Cd can act as a nutrient but at a high concentration it can interact with proteins and can change the structure and enzymatic activities within the cell of an aquatic organism and can display its toxic effects at the whole organism level.
Many rivers, lakes and estuaries in China and other countries are contaminated by Cd, which has caused serious problems to the organisms in the water and humans who use fish and other aquaculture products..
The purification of the contaminated water is a difficult and very expensive process, and different filtration systems are usually used. There are also some new technologies, such as the use of special microorganisms to remove cadmium from water. But these technologies are ineffective and the problem of the saturated microalgae utilization is not solved.
Fatty acid and fatty-acid products, like fatty acid ethyl esters are recognized as very prospective organic drug-delivery agents or surfactants. The results show that fatty acids can be used to transport micronutrients..
However, original fatty acids are usually of high viscosity , which creates difficulties for practical application. But fatty acid ethyl esters (FA) have the same viscosity as water, which makes it rather easier to operate in experimental research and practical applications. Moreover, the production of FA can be realized by using natural sources while the literature reports useful information as a drug delivery agent. This provides the possibility that FA can absorb cadmium from water. Therefore, FA can be used to remove cadmium from water.
SUMMARY OF THE INVENTION Technical Problem The technical problem to be solved by the present invention 1s to provide a composition for removing heavy metal Cd from water body, its preparation method and use, and solves technical problems such as high viscosity of fatty acid and difficulty in practical application in the prior art.
Technical Solution A method of preparing a composition for removing heavy metal Cd from water body, which 1s characterized in the following steps: Step 1: weighing an aqueous fatty acid ethyl ester suspension emulsion and a Si-rich solution into a volume ratio of 1:100 to 100:1 Step 2: adding the weighed aqueous fatty acid ethyl ester suspension emulsion and the Si- rich solution into a reactor with an agitator, stirring for 30 minutes -14days at 50-100r/ minutes under normal temperature, to obtain the composition for removing heavy metal Cd from the water body; As a preferred technical solution of the present invention, the Si-rich solution is a mixed solution of one or more silicon-rich solutions.
As a preferred technical solution of the present invention, the effective ingredients of the aqueous fatty acid ethyl ester suspension emulsion are saturated fatty acid and unsaturated fatty acid, and the concentration of the effective ingredients in the aqueous fatty acid ethyl ester suspension emulsion has a concentration of 0.1% - 99.9%.
As a preferred technical solution of the present invention, the concentration of the Si-rich solution has a concentration of 5-500000 mg Si / L.
As a preferred technical solution of the present invention, the Si-rich solution is a mixed solution of one or two solutions of potassium silicate solution and sodium silicate solution. The invention also provides a composition for removing heavy metal Cd in water body
’ LU500188 prepared by the above preparation method.
In addition, the invention also provides the use of the composition for removing heavy metal Cd in water body in the treatment of cadmium-containing wastewater.
As a preferred technical solution of the present invention, the use of the composition for removing heavy metal Cd from water body in cadmium-containing wastewater treatment includes the following steps: Step 1: add the composition for removing heavy metal Cd from water body to the cadmium-containing wastewater , mix evenly, and let stand for 1 minute to 2 weeks; Step 2 : after the completion of the stand, the treated composition for removing heavy metal Cd in the water body is separated from the water; Step 3 : use the separated and treated composition for removing heavy metal Cd from water as a diesel energy fuel or for combustion to prepare silicon-cadmium-rich ash; Step 4: use the silicon-cadmium-rich ash as a raw material for the production of heavy metal cadmium .
As a preferred technical solution of the present invention, in the Step 1, the addition ratio of the cadmium-containing wastewater to the composition for removing heavy metal Cd from the water body is according to the ratio of adding 100 ml to 100 liters of the composition for removing heavy metal Cd from the water body to 1 m° of cadmium-containing wastewater.
As a preferred technical solution of the present invention, in the Step 2, the treated composition for removing heavy metal Cd from the water body is separated from the water wherein the separation method is to use a pump to extract the upper suspension liquid, or to use a large-scale centrifugal device to centrifuge, and after centrifugation, the upper suspension liquid is removed by a pump.
Advantageous Effect The composition for removing heavy metal Cd from water body and the preparation method and use thereof provided by the present application have the following technical effects by adopting the above technical scheme compared with the prior art.
1. The present invention provides a method of preparing a composition for removing heavy metal Cd from water body with high efficiency, environmental protection and safety, which is used for purifying cadmium polluted water. The final product can be used to purify natural and industrial polluted water. The final product can be separated from the water surface for combustion or as a diesel energy fuel. The ash produced by the process contains high content of cadmium, so it can be used as a raw material for the production of heavy metal cadmium to realize the recycling industry, which is an environmentally friendly method.
2. Removal of cadmium in natural water and industrial water with a composition that removes heavy metal Cd in water bodies based on the adsorption of cadmium by fatty acid ethyl esters, the method of soluble silicon saturation is used to remove cadmium in water.
3. This method solves the problem of waste utilization after Cd treatment in wastewater. It can be used as energy raw material for combustion and energy supply. The ash obtained is also a source of Cd production in industry, which can be described as recycling and environmentally friendly.
4. The use of the composition for removing heavy metal Cd from water significantly reduced the cadmium content in the wastewater. The original fatty acid ethyl ester mixture reduced the cadmium concentration by 87.7-95.9%, and the composition for removing heavy metal Cd from water reduced the cadmium concentration by 95.1-99.7%.
5. The method has the advantages of high removal rate and high speed for cadmium concentration in wastewater.
6. The adsorption capacity of the composite mixture for removing heavy metal Cd from water 1s much higher than that of unsaturated fatty acid ethyl ester. In addition, different Si-rich materials have different removal effects on Cd. The composition for removing heavy metal Cd from water prepared by sodium silicate solution A has the highest removal rate on Cd. when the volume ratio of the composition for removing heavy metal Cd from water: the polluted water is 1:1000, the content is reduced by 87.2-98.5%; when the volume ratio of the composition for removing heavy metal Cd from water: the polluted water is 1:100, the content is reduced by 93.3-99.4%. The removal efficiency of the composition for removing heavy metal Cd from water body prepared by sodium silicate solution B is medium. when the volume ratio of the composition for removing heavy metal Cd from water body: the polluted water is 1:1000, the content is reduced by 84.6-95%. when the volume ratio of the composition for removing heavy metal Cd from water body: the polluted water is 1:100, the content is reduced by 92-
98.6%. The composition for removing heavy metal Cd from water body made by liquid glass has the lowest removal rate of Cd. When the volume ratio of the composition for removing heavy metal Cd from water body: the polluted water is 1:1000, the content is reduced by 39.4% - 74.8%. When the volume ratio of the composition for removing heavy metal Cd from water body: the polluted water is 1:100, the content is reduced by 80.3-90.5%. This shows that the higher the silicon content and the higher the pH value, the better the removal efficiency of Cd in wastewater.
’ LU500188
DETAILED DESCRIPTION OF THE INVENTION The following Example illustrates the invention.
The aqueous fatty acid ethyl ester suspension emulsion mentioned in the application is purchased from Agraforum South Africa (Pty) Ltd; liquid glass: purchased from Ivdis Co, Ltd, Russia, with the company address of prospektkomsomolsky, Cheliabinsk, Russia.
Example 1 A method of preparing a composition for removing heavy metal Cd from water body includes the following steps: Step 1: prepare the water-based fatty acid ethyl ester suspension emulsion with the effective ingredients of saturated fatty acid and unsaturated fatty acid. The concentration of the effective ingredients in the water-based fatty acid ethyl ester suspension emulsion is 0.1% -
99.9%, which is obtained from Agraforum South Africa (Pty) Ltd; Step 2: take the water-based fatty acid ethyl ester suspension emulsion and silicon-rich solution in the ratio of 1:100 to 100:1 by volume, put them into the reactor with an agitator, stir them for 30min-14days at 50-100r / min under normal temperature, and to obtain a composition for removing heavy metal Cd from water. The silicon-rich solution is a mixture of one or two solutions of potassium silicate solution and sodium silicate solution, and the concentration of silicon-rich solution has a concentration of 5-500000 mg Si / L.
The use of the composition for removing heavy metal Cd from water body in cadmium containing wastewater treatment includes the following steps: Step 1: add the composition for removing heavy metal Cd from the water to the cadmium- containing wastewater according to the ratio of 100 ml to 100 liters of the composition for removing heavy metal Cd in the 1m* of cadmium-containing wastewater, mix well, and let stand for 1 minute to 2 weeks;; Step 2 : after the completion of the stand, the fatty acid ethyl ester will be concentrated on the top of the liquid surface in the form of a suspension solution, and the upper suspension will be pumped out by a pump, or centrifuged by a large centrifugal device. After centrifugation, the upper suspension solution will be pumped away by the pump, and separate the treated composition for removing heavy metal Cd from the water ; Step 3 : use the separated treated composition for removing heavy metal Cd from water as a diesel energy fuel or for combustion to prepare silicon-cadmium-rich ash; Step 4: use the silicon-cadmium-rich ash as a raw material to produce heavy metal cadmium.
Experiment 1 First laboratory experiment was conducted in Institute Basic Biological Problems, Russian academy of sciences. The main aim of this test was to determine the effect of treated and untreated fatty acid ethyl ester on concentration of the Cd in the contaminated water. Several different Si-rich solutions were used in the experiment; the chemical characteristics of these substances are present in the Table 1.
Table 1. Chemical properties of the tested Si-rich solutions. Material pH Sodium silicate solution A 14 15 15 (China) Sodium silicate solution B 14 10 10 (Russia) Sodium silicate solution A: purchased by Jiangsu AgraForUm Ecocycle Technology Co., Ltd.. according to the data configuration in Table 1; Sodium silicate solution B: purchased from Ekksi company in Russia according to the data in Table 1.
The aqueous fatty acid ethyl ester suspension emulsion FA was used. The effective ingredients of the suspension emulsion FA were saturated fatty acid and unsaturated fatty acid. Each litre of aqueous fatty acid ethyl ester suspension emulsion contains 25 g of active ingredients.
A composition for removing heavy metal Cd from water body is prepared by mixing the aqueous fatty acid ethyl ester suspension emulsion and silicon-rich solution in the proportion of 1:1 and 10:1 by volume.
The composition for removing heavy metal Cd from water body were added to water contaminated by Cd at the rate 0.1 liter and 1 liter per m* of contaminated water. The contaminated water contained 80 ppm of Cd in the form of Cd(NO4} and its pH is about 7. The solution was agitated during 1 hour at the speed 100 rpm. The samples of water were collected after being left stand for 1 hour, 24 hours and 48 hours. The treated composition for removing heavy metal Cd from water body were separated by centrifugation. The cleaned solution was analyzed for Cd by ICP-MS I Cap-Q (USA).
The obtained result 1s present in the table 2.The using of the composition for removing heavy metal Cd from water body significantly reduced the Cd content in the polluted water. The composition for removing heavy metal Cd from water body adsorb Cd much higher than unsaturated fatty acid ethyl ester. Different silicon-rich materials have different effects on Cd removal, the composition for removing heavy metal Cd from water made by sodium silicate solution A has the highest removal rate on Cd. when the volume ratio of the composition for removing heavy metal Cd from water: polluted water is 1:1000, the content is reduced by 87.2-
98.5%; when the volume ratio of the composition for removing heavy metal Cd from water: polluted water is 1:100, the content is reduced by 93.3-99.4%. The removal efficiency of the composition for removing heavy metal Cd from water body made by sodium silicate solution B is medium. When the volume ratio of the composition for removing heavy metal Cd from water body: polluted water is 1:1000, the content is reduced by 84.6-95%. when the volume ratio of the composition for removing heavy metal Cd from water body: polluted water is 1:100, the content is reduced by 92-98.6%. The composition for removing heavy metal Cd from water body made by liquid glass has the lowest removal rate of Cd. When the volume ratio of the composition for removing heavy metal Cd from water body: polluted water is 1:1000, the content is reduced by 39.4% - 74.8%. when the volume ratio of the composition for removing heavy metal Cd from water body: polluted water is 1:100, the content is reduced by 80.3-90.5%. This shows that the higher the silicon content and the higher the pH value, the better the removal efficiency of Cd in wastewater. Table 2. The content of Cd in the purified solution. [eee Reduction in% Control | 8 | of sf 60 | sof oo | FA+ sodium silicate . 10.2 87.2 7.6 90.5 7.2 91,0
FA+ sodium silicate . 2.8 96.5 1.5 98.1 1.2 98,5 solution A(1:1) FA+ sodium silicate . 12.3 84.6 9.5 88.1 9.1 88,6 solution B (10:1) FA+ sodium silicate . 5.6 93.0 4.3 94.6 4 95,0 solution B (1:1) Rate saturated FA: contaminated solution 1:100 FA+ sodium silicate . 5.4 93.3 4.2 94.8 4.0 95.0 solutionA(10:1) FA+ sodium silicate . 1.2 98.5 0.7 99.1 0.5 99.4 solutionA (1:1) FA+ sodium silicate . 6.4 92.0 4.8 94.0 4.3 94.6 solution B (10:1) FA+ sodium silicate . 2.2 97.3 1.3 98.4 1.1 98.6 solution B (1:1) Toe wwe we] Example 2 A method of preparing a composition for removing heavy metal Cd from water body includes the following steps: Step 1: take the aqueous fatty acid ethyl ester suspension emulsion and the silicon-rich solution in the ratio of 1:100 to 100:1 by volume. The effective ingredients of the aqueous fatty acid ethyl ester suspension emulsion are saturated fatty acids and unsaturated fatty acids. The concentration of the effective ingredients in the aqueous fatty acid ethyl ester suspension emulsion has a concentration of 0.1% - 99.9%. The silicon-rich solution is one or two solutions of potassium silicate solution and sodium silicate solution Mixed solution, the concentration of silicon-rich solution has a concentration of 5-500000 mg Si / L; Step 2: put the aqueous fatty acid ethyl ester suspension emulsion and the silicon-rich solution into the reactor with an agitator, stir them for 30min-14days at 50-100r / min under normal temperature, and to obtain a composition for removing heavy metal Cd from water.
The use of the composition for removing heavy metal Cd from water body in cadmium containing wastewater treatment includes the following steps: Step 1: add the composition for removing heavy metal Cd from the water to the cadmium- containing wastewater according to the ratio of 100 ml to 100 liters of the composition for removing heavy metal Cd in the 1m* of cadmium-containing wastewater, mix well, and let stand for 1 minute to 2 weeks;; Step 2 : the fatty acid ethyl ester will be concentrated on the top of the liquid surface in the form of a suspension solution, and the upper suspension solution will be pumped out by a pump, or centrifuged by a large centrifugal device. After centrifugation, the upper suspension solution will be pumped away by the pump, and separate the treated composition for removing heavy metal Cd from the water; Step 3 : use the separated treated composition for removing heavy metal Cd from water as diesel energy fuel or for combustion to prepare silicon-cadmium-rich ash; Step 4: using the Si-Cd-rich ash as a raw material to produce heavy metal cadmium.
The second experiment was conducted in Institute Basic Biological Problems, Russian academy of sciences. The main purpose of this test is to purify the concentration of cadmium in polluted water with a composition mixture that removes heavy metal Cd in water.. Sodium silicate solution a (China) and sodium silicate solution B (Russia) were used in this experiment. The chemical properties of these substances are present in the Table 1.
The aqueous fatty acid ethyl ester suspension emulsion FA was used. The effective ingredients of the suspension emulsion FA were saturated fatty acid and unsaturated fatty acid. The concentrations of FA, 25 g/L and 100 g / L of saturated and unsaturated fatty acids in two kinds of aqueous fatty acid ethyl ester suspension emulsion were used.
According to the volume ratio of 5:1, FA is mixed with silicon rich solution, and the composition for removing heavy metal Cd from water body is prepared after 2 days and 1 week.
The composition for removing heavy metal Cd from water body were added to water contaminated by Cd at the rate 5 liter per m3 of contaminated water. The contaminated water contained 140 ppm of Cd in the form of Cd(NOs), and its pH is about 7. The solution was agitated during 1 hour at the speed 100 rpm. The samples of water were collected after being left stand for 24 hours of experiment. The treated composition for removing heavy metal Cd from water body were separated by centrifugation. The cleaned solution was analyzed for Cd by ICP-MS I Cap-Q (USA).
The concentrated composition for removing heavy metal Cd from water body after experiment was burned and then the obtained ash was collected and total content of Cd was determined after microwave digestion (HNO;—H,0,—-HFmedia) and analyzed by ICP-MS I Cap-Q (USA).
Table 3. The Cd content in solution after experiment and total Cd in the ash of the burned FA.
dF ed il Cd ppm | Reduction in% Cd ppm ash in% in ash Cow [wo | ow | =
EEE EE FA 87.7 85.4 10.3 92.6 85.8 2 FA+ sodium silicte solution 5.4 96.1 49.5 2.1 98.5 50.4
A FA+ sodium silicate solution 95.1 50.7 2.5 98.2 57.6
B nO mel] 010 FA 92.6 84.5 5.7 95.9 83.4 3 FA+ sodium silicate solution 2.1 98.5 50.4 0.4 99.7 52.2
A FA+ sodium silicate solution 3.2 97.7 52.3 0.5 53.2
B Cw [al wel The data obtained in Table 3 shows that the concentration of Cd in the solution were significantly reduced 87.7-95.9% under original fatty acid ethyl ester (FA) suspension emulsion and reduced 95.1-99.7% under the composition for removing heavy metal Cd from water body. The method has the advantages of high removal rate and high removal speed for cadmium in wastewater, and the using of silicon-rich material with high silicon content sodium silicate solution A was more effective than low sodium-content silicate solution B.
The content of total cadmium in the aqueous fatty acid ethyl ester suspension emulsion is
83.4-85.8%, and the content of total cadmium in the composition for removing heavy metal Cd from water is 49.5-57.6%. However, both ashes can be used as raw materials for the production of Cd.
Example 3.
Third experiment was conducted in Institute Basic Biological Problems, Russian academy of sciences. The main aim of this test was to prove that it is feasible to to remove of Cd from industrial waste-water by using the composition for removing heavy metal Cd from water body. The sodium silicate solution A (China) and liquid glass (Ivdis LTD, prospektKomsomolsky, Cheliabinsk, Russia) were used in this experiment. The waste-water was taken from Kursk accumulator Enterprises (Kursk, Russia). The chemical composition of this waste-water is presented in the Table 4. The characteristic of Si-rich solution is presented in Table 1. Two concentrations of FA 50g / L and 200g / L were used:.
According to the volume ratio of 10:1, FA is mixed with silicon-rich solution, and the composition for removing heavy metal Cd from water body is prepared after 1 day.
The composition for removing heavy metal Cd from water body were added to water contaminated by Cd at the rate 5 liter and 10 liter per m* of contaminated water. The mixture is stirred regularly within 24 hours. The treated composition for removing heavy metal Cd from water body were separated by centrifugation. The content of Cd in cleaning solution was analyzed by icp-ms-i-cap-q (USA).
After the experiment, the treated composition for removing heavy metal Cd in the water body was burned and the ash was collected, and the total Cd content was measured after microwave digestion (HNO;—H,0;—HF medium), and use Icp-Ms-I-Cap-Q (U.S.) to perform analysis.
The data obtained are shown in Table 5. Compared with other pollutants, the concentration of Cd in raw water is very high. Using FA alone can significantly reduce the concentration of Cd in the solution by 27-60%. The higher the FA content, the better the effect. The composition for removing heavy metal Cd in water bodies can significantly increase the reduction rate of Cd in wastewater. The use effect of sodium silicate solution A is better than that of liquid glass.
The maximum effect is 99.5%. For FA treated with sodium silicate solution A, the FA is 200g/L and the amount applied is 10 liters/m3.
The Cd content in the ash after FA treatment is relatively high (59.3-60.3%), and the Cd content in the composition for removing heavy metal Cd in the water after the treatment is between 35.4-48.5%. . All of these ashes can be used for Cd production. Table 4. The chemical characteristic of the industrial waste-water (Kursk accumulator Enterprises). Table 5. The Cd content in solution after experiment and total Cd in the ash of the burned the treated composition for removing heavy metal Cd from water. FA 50 g/L FA 200 g/L Total Cd Reduction Total Cd in Cd ppm Cd ppm | Reduction in% | in in% ash, % ash, % ew | wo | [wv] 5 liters per m3 FA+sodium silicate solution 43.3 73.7 47.6 10.4 93.7 35.4
A FA+Liquid
68.7 58.3 48.5 20.4 87.6 38.9 glass liters per m3 FA+ sodium silicate 2.5 98.5 45.6 0.7 99.5 35.4 solution À FA+ Liquid
15.1 90.8 43.6 3.8 97.7 37.4 glass
Claims (10)
1. A method of preparing a composition for removing heavy metal Cd from a water body, wherein the method comprises following steps: Step 1: weighing an aqueous fatty acid ethyl ester suspension emulsion and a Si-rich solution according to a volume ratio of 1:100 to 100:1; and Step 2: adding the weighed aqueous fatty acid ethyl ester suspension emulsion and the Si- rich solution into a reactor with an agitator, stirring for 30 minutes-14days at 50- 100r/minute in room temperature, to obtain the composition for removing heavy metal Cd from the water body.
2. The method of preparing the composition for removing heavy metal Cd from the water body according to claim 1, wherein the Si-rich solution is a mixed solution of one or more Si- rich solutions.
3. The method of preparing the composition for removing heavy metal Cd from the water body according to claim 1, wherein effective ingredients of the aqueous fatty acid ethyl ester suspension emulsion are a saturated fatty acid and an unsaturated fatty acid, and the effective ingredients in the aqueous fatty acid ethyl ester suspension emulsion has a concentration of
0.1% - 99.9%.
4. The method of preparing the composition for removing heavy metal Cd from the water body according to claim 2, wherein the Si-rich solution has a concentration of 5-500000 mg Si / L.
5. The method of preparing the composition for removing heavy metal Cd from the water body according to claim 2, wherein the Si-rich solution is a mixed solution of one or two of potassium silicate solution and sodium silicate solution.
6. A composition for removing heavy metal Cd from a water body, wherein it is obtained by the preparation method according to any one of claims 1 to 5.
7. Ause of the composition for removing heavy metal Cd from the water body according to claim 6 in a disposal of wastewater containing cadmium.
8. The use of the composition for removing heavy metal Cd from the water body in the disposal of wastewater containing cadmium according to claim 7, wherein the use comprises following steps: Step 1: adding the composition to the wastewater containing cadmium, mixing it evenly, and then disposing it in stillstand for] minute to 2 weeks; Step 2: separating, after the completion of stillstand, the disposed composition for removing heavy metal Cd from the water body from the water; Step 3: using the separated and disposed composition for removing heavy metal Cd from the water body as a fuel for diesels or for combustion to prepare Si-Cd-rich ashes; and Step 4: using the Si-Cd-rich ashes as a raw-cadmium material for production of heavy metal cadmium.
9. The use of the composition for removing heavy metal Cd from the water body in the disposal of wastewater containing cadmium according to claim 8, wherein in Step 1, an adding ratio of the cadmium-containing wastewater to the composition for removing heavy metal Cd from the water body is according to a ratio of adding 100 ml to 100 liters of the composition for removing heavy metal Cd from the water body to 1 m° of the cadmium-containing wastewater.
10. The use of the composition for removing heavy metal Cd from the water body in the disposal of cadmium containing wastewater according to claim 9, wherein in Step 2, the disposed composition for removing heavy metal Cd from the water body is separated from the water, wherein the separation method is to use a pump to extract an upper suspension liquid, or to use a large-scale centrifugal device to centrifuge, and after the centrifugation, the upper suspension liquid is removed by the pump.
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| DE102007034726A1 (en) * | 2007-07-23 | 2009-01-29 | Henkel Ag & Co. Kgaa | Removal of by-products from crosslinkable preparations |
| JP2009084492A (en) * | 2007-10-01 | 2009-04-23 | Kao Corp | Composite powder |
| KR101357298B1 (en) * | 2008-06-20 | 2014-01-28 | 에이케이 앤 엠엔 바이오팜 주식회사 | Purification and concentration method of high purity omega-3 polyunsaturated fatty acids |
| CN102527340B (en) * | 2011-12-16 | 2014-04-02 | 武汉凯迪工程技术研究总院有限公司 | Organic inorganic hybridized material for removing agent of heavy metal ions |
| CN105214628A (en) * | 2015-10-23 | 2016-01-06 | 苏州书瑞环保科技有限公司 | A kind of electroplating wastewater sorbing material and preparation method thereof |
| CN106865924A (en) * | 2017-02-15 | 2017-06-20 | 湖南省经济地理研究所 | A kind of method for innocent treatment of Sediments |
| CN206901972U (en) * | 2017-02-21 | 2018-01-19 | 广东利世康低碳科技有限公司 | A kind of rubbish from cooking wastewater treatment production line |
| CN110055137B (en) * | 2018-01-19 | 2022-11-15 | 浙江可明生物医药有限公司 | Method for efficiently removing peculiar smell in ethyl ester type polyunsaturated fatty acid oil |
| CN109438227B (en) * | 2018-04-27 | 2021-10-12 | 南京健友生化制药股份有限公司 | Production method of omega-3 polyenoic fatty acid ethyl ester |
| CN110790337B (en) * | 2019-09-26 | 2020-09-08 | 江苏爱佳福如土壤修复有限公司 | Composition for removing heavy metal Cd in water body and preparation method and application thereof |
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| WO2021057010A1 (en) | 2021-04-01 |
| CN110790337B (en) | 2020-09-08 |
| LU500188B1 (en) | 2021-09-21 |
| CN110790337A (en) | 2020-02-14 |
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