CN115353219A - Advanced oxidation-based collateral breaking method and application thereof - Google Patents
Advanced oxidation-based collateral breaking method and application thereof Download PDFInfo
- Publication number
- CN115353219A CN115353219A CN202210843336.9A CN202210843336A CN115353219A CN 115353219 A CN115353219 A CN 115353219A CN 202210843336 A CN202210843336 A CN 202210843336A CN 115353219 A CN115353219 A CN 115353219A
- Authority
- CN
- China
- Prior art keywords
- edta
- advanced oxidation
- decomplexation
- reaction system
- complex
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 49
- 230000003647 oxidation Effects 0.000 title claims abstract description 34
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 34
- 238000006243 chemical reaction Methods 0.000 claims abstract description 55
- 238000003756 stirring Methods 0.000 claims abstract description 27
- 239000003054 catalyst Substances 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 27
- FHHJDRFHHWUPDG-UHFFFAOYSA-L peroxysulfate(2-) Chemical group [O-]OS([O-])(=O)=O FHHJDRFHHWUPDG-UHFFFAOYSA-L 0.000 claims description 14
- 230000035484 reaction time Effects 0.000 claims description 13
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 3
- 229910017604 nitric acid Inorganic materials 0.000 claims description 3
- 239000002351 wastewater Substances 0.000 claims description 3
- 210000003462 vein Anatomy 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 10
- 238000004065 wastewater treatment Methods 0.000 abstract description 5
- 230000015556 catabolic process Effects 0.000 abstract description 3
- 238000006731 degradation reaction Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 7
- 239000008367 deionised water Substances 0.000 description 6
- 229910021641 deionized water Inorganic materials 0.000 description 6
- 229910021645 metal ion Inorganic materials 0.000 description 6
- 239000003446 ligand Substances 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 150000002894 organic compounds Chemical class 0.000 description 3
- 239000002738 chelating agent Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000012459 cleaning agent Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000010494 dissociation reaction Methods 0.000 description 2
- 230000005593 dissociations Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- 150000003624 transition metals Chemical class 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 230000009920 chelation Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 229910001429 cobalt ion Inorganic materials 0.000 description 1
- XLJKHNWPARRRJB-UHFFFAOYSA-N cobalt(2+) Chemical compound [Co+2] XLJKHNWPARRRJB-UHFFFAOYSA-N 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229960001484 edetic acid Drugs 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002901 radioactive waste Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
Abstract
The invention belongs to the technical field of wastewater treatment, and particularly discloses a complex breaking method based on advanced oxidation and application thereof. The method comprises the following steps: adding a catalyst and persulfate oxide into a solution or a water body containing a Co-EDTA complex to form a reaction system, adjusting the pH value of the reaction system to 1-11, heating and stirring the reaction system, and reacting to perform decomplexing treatment on the Co-EDTA complex in the solution or the water body. The method is used for carrying out the decomplexation treatment on the Co-EDTA complex generated in the wastewater treatment process, and has the advantages of high degradation speed, small amount of generated waste, low decomplexation efficiency and the like.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a vein breaking method based on advanced oxidation and application thereof.
Background
The water wall tube of the boiler is easy to corrode under the sediment during operation, and the root cause is the deposition of dirt on the inner wall of the water wall tube caused by water quality reasons or unsmooth sewage discharge, and ethylene diamine tetraacetic acid (EDTA, C) 10 H 16 N 2 O 8 ) Are widely used in cleaning agents to remove these deposits. Furthermore, EDTA is also widely used as a cleaning agent in paper making, textile production, photography, and the like. Compared with other chelating agents, EDTA has lower biodegradability in groundwater and soil, and can form a complex with heavy metals such as Fe, co, cu and Ni more easily. Wherein the content of the first and second substances, 60 co is one of the most problematic radionuclides because of its long half-life (t) 1/2 =5.27 years) and high-energy gamma radiation. The EDTA-induced cleaning effect is based on its ability to prevent the precipitation of metals such as Fe, co, cu and Ni by chelation.
Chelating agents are inorganic or organic compounds that can bind to metal ions to form soluble chelate complexes. The specific mode is that a bidentate ligand and a polydentate ligand are respectively combined with a metal ion and the ligand at two or more sites to form a ring structure. EDTA can form chelates with metal ions in the proportion of 1:1, regardless of the charge of the metal ions, and these chelates are mostly quite stable. This stability is due to the fact that multiple sites in the ligand have a cage-like structure in which the metal ions are effectively surrounded and separated from the solvent molecules.
Although EDTA is not a highly toxic compound, it can form strong complexes with heavy metal ions, thereby inducing the migration of toxic metal ions into the environment. Particularly, co-EDTA with high concentration is very easy to be used in the process of cleaning the Co-containing ions. However, the Co-EDTA complex has two main problems: (1) The existence of Co-EDTA in a natural water system causes harm to the ecological environment, thereby causing harm to human health; (2) Co-EDTA has a high molecular weight and needs to decompose to reduce the volume of radioactive waste. Because the existence of Co-EDTA reduces the removal efficiency of heavy metals in the wastewater treatment process, active research and development of efficient Co-EDTA complex breaking methods are urgently needed.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a complex breaking method based on advanced oxidation and the application thereof, which are used for decomposing and treating Co-EDTA complex generated in the wastewater treatment process.
In order to achieve the above objects and other related objects, the present invention provides a method for breaking a complex based on advanced oxidation, comprising the steps of:
adding a catalyst and persulfate oxide into a solution or water containing a Co-EDTA complex to form a reaction system, adjusting the pH of the reaction system to 1-11, heating, stirring, and reacting to perform depolymerization treatment on the Co-EDTA complex in the solution or water.
Further, the catalyst is selected from FeSO 4 、FeSO 4 ·5H 2 O、FeSO 4 ·7H 2 And O is any one of the above.
Further, the persulfate oxide is Peroxymonosulfate (PMS).
Further, in the reaction system, the molar ratio of the catalyst to the Co-EDTA complex is 2.5 to 30, preferably 10 to 15 or 12.5 to 30, more preferably 22.5 to 30, and most preferably 25 to 30.
Further, in the reaction system, the molar ratio of the persulfate oxide to the Co-EDTA complex is 10 to 100, preferably 40 to 100, more preferably 50 to 60 or 60 to 100, and most preferably 70 to 100.
From the viewpoint of cost, in the reaction system, the molar ratio of the catalyst to the Co-EDTA complex is preferably controlled to 10 to 15, and the molar ratio of the persulfate oxide to the Co-EDTA complex is preferably controlled to 50 to 60.
Further, the pH of the reaction system is adjusted to 3 to 6, preferably 3 to 5.
Further, dilute nitric acid solution and/or sodium hydroxide solution are/is adopted to adjust the pH value of the reaction system.
Further, the reaction heating temperature is 25-80 ℃; preferably, the reaction heating temperature is 50-80 ℃; more preferably, the reaction heating temperature is 60 to 80 ℃; most preferably, the reaction heating temperature is 70 to 80 ℃.
Further, the reaction time is more than or equal to 15min; preferably, the reaction time is 15-150 min; more preferably, the reaction time is 70 to 150min; most preferably, the reaction time is 70 to 90min.
Further, the reaction stirring speed is 200 to 500rad/min.
Further, the water body is wastewater.
The invention also provides application of the complex breaking method based on advanced oxidation in removing Co-EDTA complex from a solution or water body containing the Co-EDTA complex.
As described above, the advanced oxidation-based collateral breaking method and the application thereof of the present invention have the following beneficial effects:
the advanced oxidation-based complex breaking method provided by the invention is used for removing Co-EDTA complex in a solution or a water body, and has the following advantages:
(1) The method solves the disadvantages of slow degradation speed, large amount of generated secondary waste, low decomplexing efficiency and the like of the conventional processes such as coagulation, adsorption, biological process, nonspecific ion exchanger, cement solidification and the like.
(2) The persulfate oxide is easily activated to generate highly active free radicals, and the generated free radicals are easily subjected to partial or complete mineralization reaction with organic compounds in a flexible pH range, so that the disadvantage that the conventional Fenton method needs to be carried out in a strong acid environment is effectively avoided.
(3) In the PMS reaction, radicals are generally generated by the PMS reaction, and persulfate oxides mainly generate SO 4 ·- Has obvious oxidation potential and good selectivity for reaction with organic compounds.
(4) Persulfate oxide is easily decomposed by transition metal such as Co, fe or Ru through single electron transfer to decompose Co-EDTA complex, and cobalt ion (Co) generated by decomposition 2+ ) Can be used for generating SO 4 ·- . Therefore, the PMS reaction of the invention has high efficiency in a wider pH range, generates a large amount of strong free radicals by reaction with transition metals and the like, and is a good strategy for Co-EDTA complex decomposition.
Drawings
FIG. 1 is a schematic diagram showing a chemical reaction flow of a Co-EDTA complex dissociation treatment based on a complex breaking method of advanced oxidation in an embodiment of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Referring to fig. 1, the present invention provides a complex breaking method based on advanced oxidation, which is used for performing a decomplexation process on a Co-EDTA complex, and comprises the following steps:
adding a catalyst and persulfate oxide into a solution or a water body containing a Co-EDTA complex to form a reaction system, adjusting the pH value of the reaction system to 1-11, heating and stirring the reaction system, and reacting to perform decomplexing treatment on the Co-EDTA complex in the solution or the water body.
Wherein the catalyst is selected from FeSO 4 、FeSO 4 ·5H 2 O、FeSO 4 ·7H 2 And O is any one of the above.
Wherein the persulfate oxide is Peroxymonosulfate (PMS).
In the reaction system, the molar ratio of the catalyst to the Co-EDTA complex is 2.5 to 30, preferably 12.5 to 30, more preferably 22.5 to 30, and most preferably 25 to 30.
In the reaction system, the molar ratio of the persulfate oxide to the Co-EDTA complex is 10 to 100, preferably 40 to 100, more preferably 60 to 100, and most preferably 70 to 100.
Wherein the pH of the reaction system is adjusted to 3 to 6, preferably 3 to 5.
Wherein, dilute nitric acid solution and/or sodium hydroxide solution are adopted to adjust the pH value of the reaction system.
Wherein the reaction heating temperature is 25-80 ℃; preferably, the reaction heating temperature is 50-80 ℃; more preferably, the reaction heating temperature is 60 to 80 ℃; most preferably, the reaction heating temperature is 70 to 80 ℃.
Wherein the reaction time is more than or equal to 15min; preferably, the reaction time is 15-150 min; more preferably, the reaction time is 70 to 150min; most preferably, the reaction time is 70 to 90min.
Wherein the water body is wastewater.
The advanced oxidation-based complex breaking method provided by the invention can be used for removing Co-EDTA complex in a solution containing Co-EDTA complex or a water body, and has the advantages of high degradation speed, small amount of generated waste, low dissociation efficiency and the like compared with the traditional method.
The following specific exemplary examples illustrate the invention in detail. It should also be understood that the following examples are illustrative only and are not to be construed as limiting the scope of the invention, and that numerous insubstantial modifications and adaptations of the invention described above will occur to those skilled in the art. The specific process parameters and the like of the following examples are also only one example of suitable ranges, i.e., those skilled in the art can select the appropriate ranges through the description herein, and are not limited to the specific values exemplified below.
Example 1
The embodiment provides a complex breaking method based on advanced oxidation, which is used for carrying out decomplexation treatment on a Co-EDTA complex and comprises the following steps:
s1, adding 14mg of Co-EDTA complex into 20mL of deionized water to prepare 0.178mMCo-EDTA solution;
s2, placing the solution into a 50mL beaker, placing the beaker on a stirring hot plate, and adding FeSO to the solution 4 ·5H 2 O catalyst, wherein the catalyst (FeSO) 4 ·5H 2 The molar ratio of O to Co-EDTA is between 10 and 15;
s3, using dilute HNO 3 NaOH is added to control the pH value of the reaction system to be 3-5, and persulfate oxide (PMS) with the molar ratio (persulfate/Co-EDTA) of 50-60 is added at the same time;
s4, adjusting the stirring hot plate, controlling the temperature and the stirring speed of the stirring hot plate at 70 ℃ and 300rad/min respectively, and completing the decomplexation of the Co-EDTA complex after reacting for 75 min.
Example 2
In order to investigate the optimal molar ratio of the catalyst to Co-EDTA, this example provides a complex breaking method based on advanced oxidation, which is used for the decomplexation treatment of Co-EDTA complex, and includes the following steps:
s1, adding 14mg of Co-EDTA complex into 20mL of deionized water to prepare 0.178mM Co-EDTA solution;
s2, placing the solution into a 50mL beaker, placing the beaker on a stirring hot plate, and adding FeSO to the solution 4 ·5H 2 O catalyst, controlling the molar ratio of the catalyst/Co-EDTA to be between 2.5 and 30;
s3, using dilute HNO 3 Controlling the pH value of the reaction system to be 3 with NaOH, and simultaneously adding 0.142M persulfate oxide;
s4, adjusting a stirring hot plate, controlling the temperature and the stirring speed of the stirring hot plate at 25 ℃ and 300rad/min respectively, after reacting for 120min, counting the decomplexing rate of the Co-EDTA complex under different catalyst/Co-EDTA molar ratios, and showing the results in Table 1.
TABLE 1 catalyst/Co-EDTA molar ratio Co-EDTA complex breaking rate
| catalyst/Co-EDTA molar ratio | Effective collateral breaking rate (%) |
| 0 | 0 |
| 2.5 | 82.66 |
| 5 | 83.09 |
| 7.5 | 83.55 |
| 10 | 84.46 |
| 12.5 | 85.43 |
| 15 | 85.92 |
| 17.5 | 85.99 |
| 20 | 86.37 |
| 22.5 | 87.36 |
| 25 | 92.06 |
| 27.5 | 92.35 |
| 30 | 93.83 |
As shown in Table 1, when the Co-EDTA complex is subjected to decomplexation by the advanced oxidation-based complex breaking method provided by the invention, the molar ratio of the catalyst to the Co-EDTA is optimally controlled to be 25-30.
Example 3
In order to investigate the optimal molar ratio of PMS to Co-EDTA, this example provides a complex breaking method based on advanced oxidation, which is used to perform a decomplexation process on a Co-EDTA complex, and includes the following steps:
s1, adding 14mg of Co-EDTA complex into 20mL of deionized water to prepare 0.178mM Co-EDTA solution;
s2, the solution was placed in a 50mL beaker and on a stirring hot plate, 35.6mM FeSO was added to the solution 4 ·5H 2 An O catalyst;
s3, using dilute HNO 3 Controlling the pH value of the reaction system to be 3 with NaOH, simultaneously adding persulfate oxide, and controlling the molar ratio of PMS/Co-EDTA to be 0-100;
s4, adjusting a stirring hot plate, controlling the temperature and the stirring speed at 25 ℃ and 300rad/min respectively, after reacting for 120min, counting the decomplexing rate of the Co-EDTA complex under different PMS/Co-EDTA molar ratios, and showing the results in Table 2.
TABLE 2 Co-EDTA complex decomplexation rate at different PMS/Co-EDTA molar ratios
As shown in Table 2, when the Co-EDTA complex is subjected to the decomplexation treatment by the advanced oxidation-based decomplexation method provided by the invention, the molar ratio of PMS to Co-EDTA is optimally controlled to be 70-100.
Example 4
In order to investigate the optimal pH of the reaction system, this example provides a complex breaking method based on advanced oxidation, which is used for the decomplexation treatment of Co-EDTA complex, and includes the following steps:
s1, adding 14mg of Co-EDTA complex into 20mL of deionized water to prepare 0.178mM Co-EDTA solution;
s2, placing the solution into 50mLBeaker and place on stirring hot plate and add 35.6mM FeSO to solution 4 ·5H 2 An O catalyst;
s3, using dilute HNO 3 NaOH is added to control the pH value of the reaction system to be between 1 and 13, and 0.142M persulfate oxide is added at the same time;
s4, adjusting a stirring hot plate, controlling the temperature and the stirring speed at 25 ℃ and 300rad/min respectively, reacting for 120min, and counting the complex breaking rate of the Co-EDTA complex under different pH values, wherein the results are shown in Table 3.
TABLE 3 Break-complexing ratio of Co-EDTA complexes at different pH
| pH | Effective collateral breaking rate (%) |
| 1 | 88.66 |
| 2 | 89.17 |
| 3 | 94.18 |
| 4 | 93.48 |
| 5 | 92.51 |
| 6 | 89.2 |
| 7 | 88.63 |
| 8 | 87.1 |
| 9 | 86.87 |
| 10 | 86.65 |
| 11 | 86.64 |
| 12 | 86.11 |
| 13 | 86.79 |
As shown in Table 3, when the Co-EDTA complex is subjected to decomplexation by the advanced oxidation-based complex breaking method provided by the invention, the pH of the reaction system is optimally controlled to 3-5.
Example 5
In order to investigate the optimal reaction time, the present embodiment provides a complex breaking method based on advanced oxidation, which is used for performing a decomplexation process on a Co-EDTA complex, and comprises the following steps:
s1, adding 14mg of Co-EDTA complex into 20mL of deionized water to prepare 0.178mM Co-EDTA solution;
s2, the solution was placed in a 50mL beaker and on a stirring hot plate, 35.6mM FeSO was added to the solution 4 ·5H 2 An O catalyst;
s3, using dilute HNO 3 Controlling the pH value of the reaction system to be 3 with NaOH, and simultaneously adding 0.142M persulfate oxide;
s4, adjusting a stirring hot plate, controlling the temperature and the stirring speed of the stirring hot plate at 25 ℃ and 300rad/min respectively, and counting the complex breaking rate of the Co-EDTA complex after 0-150 min of reaction, wherein the results are shown in Table 4.
TABLE 4-breaking ratio of Co-EDTA complex at different reaction times
| Reaction time (min) | Effective collateral breaking rate (%) |
| 0 | 0 |
| 15 | 80.5 |
| 30 | 84.13 |
| 45 | 89.23 |
| 60 | 92.69 |
| 75 | 99.05 |
| 90 | 99.95 |
| 105 | 99.22 |
| 120 | 99.45 |
| 135 | 99.54 |
| 150 | 99.94 |
As shown in Table 4, when the Co-EDTA complex is subjected to the decomplexation treatment by the advanced oxidation-based complex breaking method provided by the invention, the reaction time is optimally controlled to be 70-90 min.
Example 6
In order to investigate the optimal reaction heating temperature, the present embodiment provides a complex breaking method based on advanced oxidation, which is used for performing a decomplexation process on a Co-EDTA complex, and comprises the following steps:
s1, adding 14mg of Co-EDTA complex into 20mL of deionized water to prepare 0.178mM Co-EDTA solution;
s2, the solution was placed in a 50mL beaker and on a stirring hotplate, 35.6mM FeSO was added to the solution 4 ·5H 2 An O catalyst;
s3, using dilute HNO 3 Controlling the pH value of the reaction system to be 3 with NaOH, and simultaneously adding 0.142M persulfate oxide;
s4, adjusting a stirring hot plate, controlling the temperature to be 25-80 ℃, controlling the stirring speed to be 300rad/min, and after reacting for 120min, counting the decomplexing rate of the Co-EDTA complex at different reaction heating temperatures, wherein the results are shown in Table 4.
TABLE 5 Co-EDTA complex breaking rate at different reaction heating temperatures
| Temperature (. Degree.C.) | Effective collateral breaking rate (%) |
| 25 | 83.62 |
| 40 | 84.3 |
| 50 | 86.64 |
| 60 | 86.11 |
| 70 | 88.85 |
| 80 | 89.67 |
As shown in Table 5, when the Co-EDTA complex is subjected to the decomplexation treatment by the advanced oxidation-based decomplexation method provided by the present invention, the reaction heating temperature is optimally controlled to 70-80 ℃.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (10)
1. A vein breaking method based on advanced oxidation is characterized by comprising the following steps: adding a catalyst and persulfate oxide into a solution or a water body containing a Co-EDTA complex to form a reaction system, adjusting the pH value of the reaction system to 1-11, heating and stirring the reaction system, and reacting to perform decomplexing treatment on the Co-EDTA complex in the solution or the water body.
2. The advanced oxidation based decomplexation method according to claim 1, wherein: the catalyst is selected from FeSO 4 、FeSO 4 ·5H 2 O、FeSO 4 ·7H 2 Any one of O; the persulfate oxide is peroxymonosulfate PMS.
3. The advanced oxidation based decomplexation method according to claim 1, wherein: in the reaction system, the molar ratio of the catalyst to the Co-EDTA complex is 2.5-30.
4. The advanced oxidation based decomplexation method according to claim 1, wherein: in the reaction system, the molar ratio of the persulfate oxide to the Co-EDTA complex is 10-100.
5. The advanced oxidation based decomplexation method according to claim 1, wherein: adjusting the pH value of the reaction system to 3-6.
6. The advanced oxidation based decomplexation method according to claim 1, wherein: and (3) regulating the pH value of the reaction system by adopting a dilute nitric acid solution and/or a sodium hydroxide solution.
7. The advanced oxidation based decomplexation method according to claim 1, wherein: the reaction heating temperature is 25-80 ℃; and/or the reaction time is more than or equal to 15min.
8. The advanced oxidation based decomplexation method according to claim 1, wherein: the reaction stirring speed is 200-500 rad/min.
9. The advanced oxidation based decomplexation method according to claim 1, wherein: the water body is wastewater.
10. Use of the advanced oxidation based decomplexation method according to any one of claims 1 to 9 for removing Co-EDTA complexes from a solution or a water body containing Co-EDTA complexes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210843336.9A CN115353219A (en) | 2022-07-18 | 2022-07-18 | Advanced oxidation-based collateral breaking method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210843336.9A CN115353219A (en) | 2022-07-18 | 2022-07-18 | Advanced oxidation-based collateral breaking method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115353219A true CN115353219A (en) | 2022-11-18 |
Family
ID=84031033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210843336.9A Pending CN115353219A (en) | 2022-07-18 | 2022-07-18 | Advanced oxidation-based collateral breaking method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115353219A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4332687A (en) * | 1978-09-21 | 1982-06-01 | Pca International, Inc. | Removal of complexed heavy metals from waste effluents |
| US20040197150A1 (en) * | 2003-04-04 | 2004-10-07 | Xpert Design And Diagnostics, Llc | Chemical oxidation of organic and inorganic contaminants by chelated transition metals catalyzed persulfate |
| US20090194486A1 (en) * | 2005-06-22 | 2009-08-06 | Martin Roy W | Composition and method for reducing chemical oxygen demand in water |
| US20110136661A1 (en) * | 2009-12-07 | 2011-06-09 | Martin Roy W | Non-hygroscopic stabilized catalyst for the in-situ generation of sulfate free radicals |
| GB201415456D0 (en) * | 2014-09-02 | 2014-10-15 | Cheung Philip | Method of removing metal ions from aqueous solutions |
| WO2015120735A1 (en) * | 2014-02-17 | 2015-08-20 | 华南理工大学 | Method for advanced treatment of papermaking wastewater by advanced oxidation of activating persulfate or peroxymonosulfate with ferrous salt |
| CN109761401A (en) * | 2019-03-12 | 2019-05-17 | 江苏中电创新环境科技有限公司 | A kind for the treatment of process of the strong complexing heavy metal waste water of EDTA class |
| CN110627250A (en) * | 2019-08-15 | 2019-12-31 | 广东工业大学 | Advanced oxidation-alkali regulation precipitation combined method for treating EDTA-Cu wastewater |
| CN111675305A (en) * | 2020-06-13 | 2020-09-18 | 北京胜德永信环保生物技术发展有限公司 | Organic wastewater oxidation treatment method and application thereof |
-
2022
- 2022-07-18 CN CN202210843336.9A patent/CN115353219A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4332687A (en) * | 1978-09-21 | 1982-06-01 | Pca International, Inc. | Removal of complexed heavy metals from waste effluents |
| US20040197150A1 (en) * | 2003-04-04 | 2004-10-07 | Xpert Design And Diagnostics, Llc | Chemical oxidation of organic and inorganic contaminants by chelated transition metals catalyzed persulfate |
| US20090194486A1 (en) * | 2005-06-22 | 2009-08-06 | Martin Roy W | Composition and method for reducing chemical oxygen demand in water |
| US20110136661A1 (en) * | 2009-12-07 | 2011-06-09 | Martin Roy W | Non-hygroscopic stabilized catalyst for the in-situ generation of sulfate free radicals |
| WO2015120735A1 (en) * | 2014-02-17 | 2015-08-20 | 华南理工大学 | Method for advanced treatment of papermaking wastewater by advanced oxidation of activating persulfate or peroxymonosulfate with ferrous salt |
| GB201415456D0 (en) * | 2014-09-02 | 2014-10-15 | Cheung Philip | Method of removing metal ions from aqueous solutions |
| CN109761401A (en) * | 2019-03-12 | 2019-05-17 | 江苏中电创新环境科技有限公司 | A kind for the treatment of process of the strong complexing heavy metal waste water of EDTA class |
| CN110627250A (en) * | 2019-08-15 | 2019-12-31 | 广东工业大学 | Advanced oxidation-alkali regulation precipitation combined method for treating EDTA-Cu wastewater |
| CN111675305A (en) * | 2020-06-13 | 2020-09-18 | 北京胜德永信环保生物技术发展有限公司 | Organic wastewater oxidation treatment method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| JUHYEOK LEE 等: ""Comparative study of PMS oxidation with Fenton oxidation as an advanced oxidation process for Co-EDTA decomplexation"", 《CHEMOSPHERE》, pages 1 - 10 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6843414B1 (en) | Graphitization group Nitrogen complex Fe (III) -Fe ▲ 0 ▼ Method for preparing catalyst | |
| CN107555616B (en) | Method for synchronously removing ammonia nitrogen and nitrate nitrogen in water body | |
| CN103086569B (en) | Method for detoxifying, emission-reducing and deeply treating wastewater of electronic electroplating industry | |
| CN102218319A (en) | Preparation method of supported FeOOH catalyst, and electro-Fenton waste water treatment system | |
| JP7065819B2 (en) | Radioactive waste treatment method | |
| CN104445556A (en) | Efficient sewage treatment agent | |
| JP2009148749A (en) | Heavy metal-containing water treating method | |
| JP2013075252A (en) | Treatment method removing cesium and heavy metal from wastewater | |
| CN108585125B (en) | Carbon-based copper-nickel composite electrode for reducing nitrate nitrogen in water, preparation method and application thereof | |
| CN106215864A (en) | A kind of magnetic oxygenated Graphene sewage-treating agent of Adsorption of Heavy Metal Ions and preparation method thereof | |
| CN109047320B (en) | Remediation method for organic contaminated soil | |
| CN101168465A (en) | Catalysis wet-type oxidation degradation method for dyestuff contaminant | |
| CN114229949A (en) | Method for removing organic pollutants in water by photo-assisted activation of peroxymonosulfate | |
| CN110803752A (en) | Method for removing heavy metals in water body | |
| CN211688726U (en) | Electroplating wastewater treatment device for treating metal-chelating agent complex | |
| Sailo et al. | Efficient use of ferrate (VI) for the remediation of wastewater contaminated with metal complexes | |
| CN104355444A (en) | Treatment method of complexing heavy metal wastewater | |
| CN115353219A (en) | Advanced oxidation-based collateral breaking method and application thereof | |
| CN112452145A (en) | Treatment method of ammonia-containing waste gas | |
| CN111013535A (en) | Preparation method and application of lead-adsorbed magnetic graphene oxide composite material | |
| CN111072123B (en) | Method for removing complex lead by ferrous phosphate under anoxic condition | |
| CN109231543B (en) | Treatment method of wastewater containing high-concentration cyanonitrobenzene | |
| JPH0699181A (en) | Method for treating waste liquid containing decomposition-resistant organic substance | |
| CN103395911A (en) | Method for treating citric acid pickling waste liquid of boiler of thermal power plant | |
| JP2009178638A (en) | Arsenic removing agent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20221118 |