CN117800547A - Pharmaceutical chemical wastewater treatment process - Google Patents
Pharmaceutical chemical wastewater treatment process Download PDFInfo
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- CN117800547A CN117800547A CN202410161966.7A CN202410161966A CN117800547A CN 117800547 A CN117800547 A CN 117800547A CN 202410161966 A CN202410161966 A CN 202410161966A CN 117800547 A CN117800547 A CN 117800547A
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- 230000008569 process Effects 0.000 title claims abstract description 32
- 239000000126 substance Substances 0.000 title claims abstract description 24
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 22
- 229920001285 xanthan gum Polymers 0.000 claims abstract description 63
- GJCOSYZMQJWQCA-UHFFFAOYSA-N 9H-xanthene Chemical compound C1=CC=C2CC3=CC=CC=C3OC2=C1 GJCOSYZMQJWQCA-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 31
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 31
- 239000002131 composite material Substances 0.000 claims abstract description 31
- 239000010865 sewage Substances 0.000 claims abstract description 21
- 238000003756 stirring Methods 0.000 claims abstract description 19
- 239000003054 catalyst Substances 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
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- 238000001035 drying Methods 0.000 claims abstract description 10
- 230000001105 regulatory effect Effects 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 229940082509 xanthan gum Drugs 0.000 claims description 35
- 235000010493 xanthan gum Nutrition 0.000 claims description 35
- 239000000230 xanthan gum Substances 0.000 claims description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 239000013384 organic framework Substances 0.000 claims description 24
- 239000008367 deionised water Substances 0.000 claims description 20
- 229910021641 deionized water Inorganic materials 0.000 claims description 20
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 18
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 14
- 229910002090 carbon oxide Inorganic materials 0.000 claims description 14
- 239000002071 nanotube Substances 0.000 claims description 14
- 238000001291 vacuum drying Methods 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- 239000002351 wastewater Substances 0.000 claims description 7
- LMDZBCPBFSXMTL-UHFFFAOYSA-N 1-Ethyl-3-(3-dimethylaminopropyl)carbodiimide Substances CCN=C=NCCCN(C)C LMDZBCPBFSXMTL-UHFFFAOYSA-N 0.000 claims description 6
- FPQQSJJWHUJYPU-UHFFFAOYSA-N 3-(dimethylamino)propyliminomethylidene-ethylazanium;chloride Chemical compound Cl.CCN=C=NCCCN(C)C FPQQSJJWHUJYPU-UHFFFAOYSA-N 0.000 claims description 6
- CTENFNNZBMHDDG-UHFFFAOYSA-N Dopamine hydrochloride Chemical compound Cl.NCCC1=CC=C(O)C(O)=C1 CTENFNNZBMHDDG-UHFFFAOYSA-N 0.000 claims description 6
- NQTADLQHYWFPDB-UHFFFAOYSA-N N-Hydroxysuccinimide Chemical compound ON1C(=O)CCC1=O NQTADLQHYWFPDB-UHFFFAOYSA-N 0.000 claims description 6
- 229960001149 dopamine hydrochloride Drugs 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000004108 freeze drying Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 3
- 208000014451 palmoplantar keratoderma and congenital alopecia 2 Diseases 0.000 claims description 3
- 238000001223 reverse osmosis Methods 0.000 claims description 3
- 238000004659 sterilization and disinfection Methods 0.000 claims description 3
- 238000000108 ultra-filtration Methods 0.000 claims description 3
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 11
- 230000003197 catalytic effect Effects 0.000 abstract description 6
- 229910052742 iron Inorganic materials 0.000 abstract description 6
- -1 iron ions Chemical class 0.000 abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- 238000011068 loading method Methods 0.000 abstract 1
- 239000011148 porous material Substances 0.000 abstract 1
- 239000002994 raw material Substances 0.000 description 10
- 239000000243 solution Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000009303 advanced oxidation process reaction Methods 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- VYFYYTLLBUKUHU-UHFFFAOYSA-N dopamine Chemical compound NCCC1=CC=C(O)C(O)=C1 VYFYYTLLBUKUHU-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000005661 hydrophobic surface Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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- 231100000719 pollutant Toxicity 0.000 description 2
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- 238000001179 sorption measurement Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
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- 239000007809 chemical reaction catalyst Substances 0.000 description 1
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- 229960003638 dopamine Drugs 0.000 description 1
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- 125000000524 functional group Chemical group 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
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- 230000001988 toxicity Effects 0.000 description 1
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- Carbon And Carbon Compounds (AREA)
Abstract
The invention discloses a pharmaceutical chemical wastewater treatment process, and belongs to the technical field of wastewater treatment. The process comprises the following steps: step 1, pretreating sewage; step 2, carrying out Fenton reaction on the pretreated sewage: combining xanthan gum-carbon nanotube composite material with FeCl 3 Mixing the solutions, stirring and reacting for 16-24 hours, centrifugally filtering, and drying to obtain a modified catalyst; regulating pH value of sewage, adding H 2 O 2 And a modified catalyst; step 3,And carrying out secondary treatment after finishing the Fenton reaction, thus finishing the process. The modified catalyst in the invention is prepared from FeCl 3 The solution and the xanthan gum-carbon nano tube composite material are mixed to form the porous material with larger specific surface area, the loading capacity of iron ions is improved, so that the catalytic efficiency is improved, the COD (chemical oxygen demand) removal rate in sewage is high, secondary pollution is not easy to occur, and the sewage treatment process is simple, mild in condition, environment-friendly and easy to industrialize.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a pharmaceutical chemical sewage treatment process.
Background
The problem of environmental pollution is a focus of extensive attention of researchers, affected by the development of human society and the progress of industrial globalization. The components of the wastewater in the pharmaceutical industry production are very complex, the produced production wastewater has the characteristics of high concentration of pollutants, complex pollution factors, extremely poor direct biodegradability, large biological toxicity and the like, serious harm is caused to the ecological environment, and from the aspect of the overall development of the current chemical industry in China, many chemical enterprises take measures to treat the wastewater, and many methods for treating the organic wastewater, such as a physical method, a chemical method, a physicochemical method, an electrochemical method, a biological method and the like, are adopted, but the degradation degree of the organic matters is not particularly high, so that the wastewater treatment is not thorough. In recent years, advanced oxidation technology (AOPs) in Fenton reaction (Fenton) has been studied greatly, wherein the advanced oxidation technology (AOPs) is the most studied chemical method at present for effectively treating refractory macromolecular organic pollutants, and hydroxyl radical (OH) generated by a strong oxidant is catalyzed to play a key role in degradation in the reaction process.
However, the traditional Fenton reaction has the problems of strong acid pH condition, difficult recycling of the catalyst, secondary pollution caused by metal precipitation and the like, and the Fenton reaction catalyst has the problems of low reaction speed and poor catalytic degradation effect, and in practical application, the addition amount of the catalyst and hydrogen peroxide is increased to improve the catalytic effect, and the degradation reaction time is prolonged, so that the economic cost is greatly increased. Therefore, development of a pharmaceutical and chemical wastewater treatment process which is economical in cost, simple in process and wide in application, can control pollutants in chemical wastewater from the source and can improve the chemical wastewater treatment effect is urgent.
Disclosure of Invention
The invention aims to provide a pharmaceutical chemical wastewater treatment process for solving the problem of lower Fenton process catalytic efficiency in the wastewater treatment process.
The aim of the invention can be achieved by the following technical scheme:
a pharmaceutical chemical wastewater treatment process comprises the following steps:
step 1, pretreating sewage;
step 2, carrying out Fenton reaction on the pretreated sewage:
combining xanthan gum-carbon nanotube composite material with FeCl 3 Mixing the solutions, stirring and reacting for 16-24 hours, centrifugally filtering, and drying to obtain a modified catalyst; regulating pH value of sewage, adding H 2 O 2 And a modified catalyst;
and step 3, performing secondary treatment after finishing the Fenton reaction, thus finishing the process.
Further, the xanthan gum-carbon nanotube composite is prepared by the steps of:
adding the modified xanthan gum organic framework and the carbon oxide nano tube into deionized water, performing ultrasonic dispersion, stirring, performing centrifugal filtration, washing, and performing vacuum drying to obtain the xanthan gum-carbon nano tube composite material. According to the technical scheme, the carbon oxide nanotubes are added into the modified xanthan gum organic framework aqueous solution, interaction is generated between the hydrophobic surface of the skeleton on the modified xanthan gum organic framework and the hydrophobic surface of the carbon oxide nanotubes, so that strong van der Waals force among molecules of the carbon oxide nanotubes is damaged, the dispersibility of the carbon oxide nanotubes is improved, and meanwhile, the carbon oxide nanotubes and the modified xanthan gum organic framework are highly matched in size, and further are cross-linked and assembled with each other to obtain the composite material.
Further, the dosage ratio of the modified xanthan gum organic framework, the carbon oxide nano tube and the deionized water is 0.3g:0.5-0.7g:10mL.
Further, the modified xanthan gum organic framework is prepared by the steps of:
adding the xanthan gum organic frame into deionized water, stirring, regulating the pH, heating to 35-40 ℃, adding 1-ethyl- (3-dimethylaminopropyl) carbodiimide hydrochloride, N-hydroxysuccinimide and dopamine hydrochloride, stirring, dialyzing, and freeze-drying to obtain the modified xanthan gum organic frame.
Further, the dosage ratio of the xanthan gum organic framework, deionized water, 1-ethyl- (3-dimethylaminopropyl) carbodiimide hydrochloride, N-hydroxysuccinimide and dopamine hydrochloride is 2g:100mL:1.8-2.0g:2.25-2.35g:3.6-4.0g, wherein the pH is adjusted to 5-6.
Further, in step 2, the xanthan gum-carbon nanotube composite material and FeCl 3 The dosage ratio of the solution is 0.2-0.3g:25-40mL of FeCl 3 The concentration of (C) is 1-2mol/L.
Further, in the step 2, the pH value of the sewage is regulated to be 3-4.
Further, the pretreatment step in the step 1 is as follows: and (5) performing preliminary filtration, adjusting in an adjusting tank, and treating in a CASS biochemical tank after the adjustment is finished.
Further, the secondary treatment step in the step 3 is as follows: and carrying out ultrafiltration, reverse osmosis treatment, disinfection, water quality detection and discharge on the sewage.
Further, the xanthan gum organic framework is prepared by a methanol diffusion method. In the technical scheme, the organic framework of the xanthan gum is successfully prepared by a methanol diffusion method, the framework is a star-shaped organic framework formed by condensation among molecules, the framework has micropores with a macrocyclic structure and a hollow structure established by arrangement of hexagonal connectors, and the structural characteristics enable the organic framework of the xanthan gum to have the characteristics of high porosity, multiple reactive sites and the like.
The invention has the beneficial effects that:
the modified catalyst prepared by the invention is prepared by mixing iron ions and xanthan gum-carbon nano tube composite materials, and hydroxyl and epoxy atoms on the molecular structure of modified xanthan gum are coordinated with the iron ions to form an 8-shaped double-channel, so that a three-dimensional network-shaped porous composite material is formed; has the advantages of adjustability, large specific surface area and the like. The porous structure and the higher active site promote the iron ion adsorption quantity to be increased, and the desorption is not easy to occur, so that the catalytic efficiency in the Fenton process is improved, and the treatment period is shortened; meanwhile, the leaching amount of iron is reduced, so that the formation of iron sludge is effectively avoided, and the occurrence of secondary pollution is reduced.
In the xanthan gum-carbon nano tube composite material, the organic framework of the xanthan gum has large specific surface area, higher porosity and high dispersion performance, can be kept highly stable in water, has a large number of oxygen-containing tube functional groups on the surface, and is favorable for H 2 O 2 The catalytic rate of (a) is increased. After being grafted and modified by dopamineTo Fe is improved 2+ And Fe (Fe) 3+ The adsorption capacity of the catalyst is increased, and the rate of the catalytic reaction is further accelerated. Meanwhile, the dopamine has certain antibacterial capability, so that the action period of the xanthan gum is prolonged, and the economic cost is reduced; carbon nano tube is used as filler and crosslinked with the filler to form a composite material, so that the impact strength and mechanical property in water are enhanced. The modified catalyst prepared by the invention has the advantages of no need of external energy, simple operation and the like, greatly improves the sewage treatment efficiency, and widens the scale and application range.
The sewage treatment process is simple, mild in condition, environment-friendly, free of toxic and harmful substances, and easy to industrialize.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The xanthan gum organic framework used in the examples and comparative examples of the present invention is prepared by the following steps:
adding 1.0g of xanthan gum and 6mL of potassium hydroxide solution into a beaker containing 30mL of deionized water, stirring for 0.5h, then placing into another beaker containing 100mL of methanol, sealing the beaker, allowing methanol to volatilize and diffuse into the aqueous solution, centrifugally collecting solids generated at the bottom and the wall surface of the beaker after one week, washing 3 times with methanol, and drying in a vacuum oven at 45 ℃ for 24h to obtain the xanthan gum organic framework.
The carbon oxide nanotubes used are prepared by the following steps:
5g of carbon nano tube is placed in 500 ℃ air for annealing for 5 hours, after cooling to room temperature, the treated carbon nano tube is mixed with 95mL of hydrochloric acid solution (5 wt%) and treated by ultrasonic treatment for 0.5-1 hour, after the precipitate is filtered and washed with deionized water for 3-5 times, and the carbon nano tube is obtained after the precipitate is placed in a vacuum drying oven at 60 ℃ for drying for 12 hours.
Examples
The present example provides a xanthan gum-composite material prepared as follows:
s1, adding 2g of xanthan gum organic frame into 100mL of deionized water, stirring for 1h, regulating the pH to 5.5, heating to 35 ℃, adding 1.9g of 1-ethyl- (3-dimethylaminopropyl) carbodiimide hydrochloride, 2.3-g N-hydroxysuccinimide and 3.6g of dopamine hydrochloride, stirring for 1.5h, heating to 40 ℃ again for reacting for 24h, dialyzing and freeze-drying to obtain a modified xanthan gum organic frame;
s2, adding 0.3g of modified xanthan gum organic framework and 0.5g of carbon oxide nano tube into 10mL of deionized water, uniformly dispersing by ultrasonic, stirring for 10 hours at room temperature, centrifugally filtering, washing for 3 times by absolute ethyl alcohol and deionized water respectively, and drying for 24 hours in a vacuum drying oven at 60 ℃ to obtain the xanthan gum-carbon nano tube composite material.
Examples
The difference from example 1 is only that step S1 is different:
s1, adding 2g of xanthan gum organic frame into 100mL of deionized water, stirring for 1h, regulating the pH to 5.5, heating to 38 ℃, adding 1.9g of 1-ethyl- (3-dimethylaminopropyl) carbodiimide hydrochloride, 2.3-g N-hydroxysuccinimide and 4.0g of dopamine hydrochloride, stirring for 2h, heating to 40 ℃ again, reacting for 23h, dialyzing and freeze-drying to obtain a modified xanthan gum organic frame;
the other raw materials and steps were the same as in example 1.
Examples
The difference from example 1 is only that step S2 is different:
s2, adding 0.3g of modified xanthan gum organic framework and 0.7g of carbon oxide nano tube into 10mL of deionized water, uniformly dispersing by ultrasonic, stirring for 11h at room temperature, centrifugally filtering, washing for 3 times by absolute ethyl alcohol and deionized water respectively, and drying for 24h in a vacuum drying oven at 60 ℃ to obtain the xanthan gum-carbon nano tube composite material.
The other raw materials and steps were the same as in example 1.
Examples
The only difference from example 2 is that:
s2, adding 0.3g of modified xanthan gum organic framework and 0.6g of carbon oxide nano tube into 10mL of deionized water, uniformly dispersing by ultrasonic, stirring for 10 hours at room temperature, centrifugally filtering, washing for 3 times by absolute ethyl alcohol and deionized water respectively, and drying for 24 hours in a vacuum drying oven at 60 ℃ to obtain the xanthan gum-carbon nano tube composite material.
The other raw materials and steps were the same as in example 2.
Comparative example 1
Compared with example 1, the reaction of step S1 was not performed to obtain a xanthan gum-carbon nanotube composite:
adding 0.3g of xanthan gum organic framework and 0.5g of carbon oxide nano tube into 10mL of deionized water, uniformly dispersing by ultrasonic, stirring for 10h at room temperature, centrifugally filtering, washing for 3 times by using absolute ethyl alcohol and deionized water respectively, and drying for 24h in a vacuum drying oven at 60 ℃ to obtain the xanthan gum-carbon nano tube composite material.
The rest raw materials and steps are the same as the examples.
Comparative example 2
Compared with example 1, the xanthan gum organic frame was directly used without performing the reactions of steps S1 and S2, and the other raw materials and steps were the same as in example.
Examples
The pharmaceutical chemical wastewater treatment process specifically comprises the following steps:
step 1, carrying out preliminary filtration on sewage, then entering an adjusting tank for adjustment, and entering a CASS biochemical tank for treatment after adjustment is finished.
Step 2, carrying out Fenton reaction on the pretreated sewage:
the xanthan gum-carbon nanotube composite of example 1 was combined with FeCl 3 Mixing the solutions, stirring and reacting for 18 hours, centrifugally filtering, and drying to obtain a modified catalyst; the pH value of the sewage is regulated to 3.5 by sulfuric acid solution, H is added 2 O 2 And a modified catalyst;
and step 3, performing ultrafiltration, reverse osmosis treatment, disinfection, water quality detection and discharge after the Fenton reaction is finished, thus finishing the process.
Examples
The only difference from example 5 is that:
the xanthan gum-carbon nanotube composite of example 5 was replaced with the xanthan gum-carbon nanotube composite of example 2; the other raw materials and steps were the same as in example 5.
Examples
The only difference from example 5 is that:
the xanthan gum-carbon nanotube composite of example 5 was replaced with the xanthan gum-carbon nanotube composite of example 3; the other raw materials and steps were the same as in example 5.
Examples
The only difference from example 5 is that:
the xanthan gum-carbon nanotube composite of example 5 was replaced with the xanthan gum-carbon nanotube composite of example 4; the other raw materials and steps were the same as in example 5.
Examples
The only difference from example 5 is that:
the xanthan gum-carbon nanotube composite of example 5 was replaced with the xanthan gum-carbon nanotube composite of comparative example 1; the other raw materials and steps were the same as in example 5.
Examples
The only difference from example 5 is that:
the xanthan gum-carbon nanotube composite of example 5 was replaced with the xanthan gum organic framework of comparative example 2; the other raw materials and steps were the same as in example 5.
The COD concentration of the wastewater before and after the treatment in examples 5 to 10 was measured, and the COD values before and after the treatment were recorded to calculate the COD removal rate (%), and the results are shown in Table 1:
TABLE 1
| Project | Example 5 | Example 6 | Example 7 | Example 8 | Example 9 | Example 10 |
| COD removal Rate (%) | 86.8 | 86.4 | 87.2 | 87.1 | 68.2 | 63.5 |
As can be seen from Table 1, the COD removal rates (%) in examples 5 to 8 were higher than those in examples 9 to 10, and thus, the treatment effect of the pharmaceutical and chemical wastewater treatment process of the present invention was excellent.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The pharmaceutical chemical wastewater treatment process is characterized by comprising the following steps of:
step 1, pretreating sewage;
step 2, carrying out Fenton reaction on the pretreated sewage:
combining xanthan gum-carbon nanotube composite material with FeCl 3 Mixing the solutions, stirring and reacting for 16-24 hours, centrifugally filtering, and drying to obtain a modified catalyst; regulating pH value of sewage, adding H 2 O 2 And a modified catalyst;
and step 3, performing secondary treatment after finishing the Fenton reaction, thus finishing the process.
2. The pharmaceutical chemical wastewater treatment process according to claim 1, wherein the xanthan gum-carbon nanotube composite is prepared by:
adding the modified xanthan gum organic framework and the carbon oxide nano tube into deionized water, performing ultrasonic dispersion, stirring, performing centrifugal filtration, washing, and performing vacuum drying to obtain the xanthan gum-carbon nano tube composite material.
3. The pharmaceutical chemical wastewater treatment process according to claim 2, wherein the dosage ratio of the modified xanthan gum organic framework, the carbon oxide nanotubes and the deionized water is 0.3g:0.5-0.7g:10mL.
4. The pharmaceutical chemical wastewater treatment process according to claim 2, wherein the modified xanthan gum organic framework is prepared by:
adding the xanthan gum organic frame into deionized water, stirring, regulating the pH, heating to 35-40 ℃, adding 1-ethyl- (3-dimethylaminopropyl) carbodiimide hydrochloride, N-hydroxysuccinimide and dopamine hydrochloride, stirring, dialyzing, and freeze-drying to obtain the modified xanthan gum organic frame.
5. The pharmaceutical wastewater treatment process according to claim 4, wherein the dosage ratio of the xanthan gum organic framework, deionized water, 1-ethyl- (3-dimethylaminopropyl) carbodiimide hydrochloride, N-hydroxysuccinimide and dopamine hydrochloride is 2g:100mL:1.8-2.0g:2.25-2.35g:3.6-4.0g, wherein the pH is adjusted to 5-6.
6. The pharmaceutical wastewater treatment process according to claim 5, wherein in step 2, the xanthan gum-carbon nanotube composite material and FeCl are as follows 3 The dosage ratio of the solution is 0.2-0.3g:25-40mL of FeCl 3 The concentration of (C) is 1-2mol/L.
7. The pharmaceutical and chemical wastewater treatment process according to claim 1, wherein the pH of the wastewater is adjusted to 3-4 in step 2.
8. The pharmaceutical and chemical wastewater treatment process according to claim 1, wherein the pretreatment step in step 1 is as follows: and (5) performing preliminary filtration, adjusting in an adjusting tank, and treating in a CASS biochemical tank after the adjustment is finished.
9. The pharmaceutical and chemical wastewater treatment process according to claim 1, wherein the secondary treatment step in the step 3 is as follows: and carrying out ultrafiltration, reverse osmosis treatment, disinfection, water quality detection and discharge on the sewage.
10. The pharmaceutical wastewater treatment process of claim 4, wherein the xanthan gum organic framework is prepared by a methanol diffusion method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202410161966.7A CN117800547A (en) | 2024-02-05 | 2024-02-05 | Pharmaceutical chemical wastewater treatment process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410161966.7A CN117800547A (en) | 2024-02-05 | 2024-02-05 | Pharmaceutical chemical wastewater treatment process |
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| CN117800547A true CN117800547A (en) | 2024-04-02 |
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| CN202410161966.7A Pending CN117800547A (en) | 2024-02-05 | 2024-02-05 | Pharmaceutical chemical wastewater treatment process |
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