CN111646559A - Method for removing iodo-contrast agent in water in enhanced manner - Google Patents
Method for removing iodo-contrast agent in water in enhanced manner Download PDFInfo
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- 239000002872 contrast media Substances 0.000 title claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 23
- JRKICGRDRMAZLK-UHFFFAOYSA-L peroxydisulfate Chemical compound [O-]S(=O)(=O)OOS([O-])(=O)=O JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims abstract description 36
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 229910052740 iodine Inorganic materials 0.000 claims abstract description 11
- 239000011630 iodine Substances 0.000 claims abstract description 11
- 125000002346 iodo group Chemical group I* 0.000 claims description 14
- 239000003814 drug Substances 0.000 claims description 8
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 claims description 7
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 2
- 239000000193 iodinated contrast media Substances 0.000 claims 5
- 229940039231 contrast media Drugs 0.000 claims 1
- -1 persulfate compound Chemical class 0.000 claims 1
- 230000035484 reaction time Effects 0.000 abstract description 14
- 230000033558 biomineral tissue development Effects 0.000 abstract description 8
- 238000004904 shortening Methods 0.000 abstract 1
- 229960001025 iohexol Drugs 0.000 description 18
- NTHXOOBQLCIOLC-UHFFFAOYSA-N iohexol Chemical compound OCC(O)CN(C(=O)C)C1=C(I)C(C(=O)NCC(O)CO)=C(I)C(C(=O)NCC(O)CO)=C1I NTHXOOBQLCIOLC-UHFFFAOYSA-N 0.000 description 18
- 230000015556 catabolic process Effects 0.000 description 14
- 238000006731 degradation reaction Methods 0.000 description 14
- 238000005516 engineering process Methods 0.000 description 10
- 238000004659 sterilization and disinfection Methods 0.000 description 7
- 230000003213 activating effect Effects 0.000 description 6
- 230000004913 activation Effects 0.000 description 6
- 239000006227 byproduct Substances 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- ZEYOIOAKZLALAP-UHFFFAOYSA-M sodium amidotrizoate Chemical compound [Na+].CC(=O)NC1=C(I)C(NC(C)=O)=C(I)C(C([O-])=O)=C1I ZEYOIOAKZLALAP-UHFFFAOYSA-M 0.000 description 5
- 238000005660 chlorination reaction Methods 0.000 description 4
- 229960004647 iopamidol Drugs 0.000 description 4
- XQZXYNRDCRIARQ-LURJTMIESA-N iopamidol Chemical compound C[C@H](O)C(=O)NC1=C(I)C(C(=O)NC(CO)CO)=C(I)C(C(=O)NC(CO)CO)=C1I XQZXYNRDCRIARQ-LURJTMIESA-N 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- YVPYQUNUQOZFHG-UHFFFAOYSA-N amidotrizoic acid Chemical compound CC(=O)NC1=C(I)C(NC(C)=O)=C(I)C(C(O)=O)=C1I YVPYQUNUQOZFHG-UHFFFAOYSA-N 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229960005423 diatrizoate Drugs 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229960002603 iopromide Drugs 0.000 description 2
- DGAIEPBNLOQYER-UHFFFAOYSA-N iopromide Chemical compound COCC(=O)NC1=C(I)C(C(=O)NCC(O)CO)=C(I)C(C(=O)N(C)CC(O)CO)=C1I DGAIEPBNLOQYER-UHFFFAOYSA-N 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 241000282412 Homo Species 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 239000012612 commercial material Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000007857 degradation product Substances 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000002059 diagnostic imaging Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 230000001738 genotoxic effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- SNHMUERNLJLMHN-UHFFFAOYSA-N iodobenzene Chemical compound IC1=CC=CC=C1 SNHMUERNLJLMHN-UHFFFAOYSA-N 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 231100000219 mutagenic Toxicity 0.000 description 1
- 230000003505 mutagenic effect Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 239000000825 pharmaceutical preparation Substances 0.000 description 1
- 229940127557 pharmaceutical product Drugs 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 231100000378 teratogenic Toxicity 0.000 description 1
- 230000003390 teratogenic effect Effects 0.000 description 1
- 229910001428 transition metal ion Inorganic materials 0.000 description 1
- 229910000314 transition metal oxide Inorganic materials 0.000 description 1
- 238000004065 wastewater treatment Methods 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/36—Organic compounds containing halogen
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Medicinal Preparation (AREA)
Abstract
The invention relates to a method for removing iodine-containing contrast agents in water in an enhanced mode. Compared with the prior art, the invention adopts the laser ultraviolet light source, can quickly reduce the content of the iodo-contrast agent in water, has high mineralization degree and high utilization rate of persulfate; the method has the advantages of simple operation, easy control of reaction conditions, effective shortening of reaction time and engineering application value.
Description
Technical Field
The invention belongs to the technical field of water body treatment of iodine-containing contrast agents, and relates to a method for removing iodine-containing contrast agents in water in an enhanced manner.
Background
Iodo-based contrast agents are a class of pharmaceutical products that are widely used in medical imaging procedures in hospitals and medical centers. Iodinated contrast agents are a class of derivative compounds of 2,4, 6-iodo-benzene, and the commonly used iodinated contrast agents mainly include nonionic iohexol (iohexol), iopamidol (iopamidol), iopromide (iopromide), ionic diatrizoate (diatrizoate), and the like. Can be eliminated by human excretion within 24 hours after administration, and the concentration level detectable in the secondary effluent of hospitals can reach the mg/L level. Because the chemical property of the iodo-substituted contrast agent is stable, the iodo-substituted contrast agent is difficult to effectively remove by the traditional wastewater treatment process. Thus, the presence of iodinated contrast agents is also often detected in surface water and source water during water treatment. Studies have shown that iodo-based contrast agents are typical precursors of disinfection byproducts with "carcinogenic, teratogenic, mutagenic" properties, and due to the presence of iodine in their chemical structure, can react with chlorine-based disinfectants and produce iodo-based disinfection byproducts with strong cellular and genotoxic properties. Because the iodo-based contrast agent widely exists in sewage and water source water, the presence of iodo-based disinfection byproducts brings serious ecological safety risk to a receiving water body for factory water of a sewage plant disinfected by chlorination; for the drinking water delivery water sterilized by chlorination, the byproducts directly threaten the health and safety of human beings. In addition, the stability of the iodo-substituted contrast agent itself enables it to gradually accumulate in aqueous environments, which is also potentially harmful to humans and the environment. Therefore, a technology for controlling the efficient removal of such emerging pollutants in an aqueous environment is in need of development.
At present, preliminary research on removing iodo-based contrast agents in water bodies at home and abroad is carried out, for example, advanced oxidation technologies such as ozone, ultraviolet/chlorine, ultraviolet/hydrogen peroxide and the like are adopted, but the removal rate is still to be improved due to the influence of the yield of free radicals and the like. Based on sulfate radicals (SO)4 -H.) has become one of the hot spots of recent research in the field of water treatment. SO produced by activation of Permonosulfate (PMS) and Persulfate (PS)4 -·(E02.5-3.1V) has higher oxidation-reduction potential, thus being more suitable for oxidizing refractory organic matters. Persulfate can be activated by heat, ultraviolet light (254-272 nm), transition metal ions, metal oxides and the like to generate SO4 -To prepare the compound. The advanced oxidation technology based on ultraviolet light is widely applied, however, when the light source of the traditional low-pressure and medium-pressure ultraviolet mercury lamps is used for activating the oxidant to treat the organic matters which are difficult to degrade in water, a plurality of technical bottlenecks exist, namely, a long ultraviolet contact time is needed, the yield of free radicals is not high, the utilization rate of the oxidant is low, the mineralization rate of pollutants is also low, and partial degradation products are easy to generate toxic disinfection byproducts caused by 'three causes' in the subsequent chlorination disinfection process.
Therefore, there is a need to develop advanced oxidation technology based on a new ultraviolet light source, and the present invention is proposed to solve the above problems.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned drawbacks of the prior art and providing a method for removing iodine-containing contrast medium in water. The technology of strengthening removal of the iodo-based contrast agent in water by activating Persulfate (PS) through Laser ultraviolet (Laser UV) is adopted, so that the reaction time is obviously shortened, the utilization rate of a persulfate medicament and the mineralization rate of refractory organic matters are improved, and the method has a high practical application value.
The purpose of the invention can be realized by the following technical scheme:
a method for removing iodine-containing contrast agents in water in an enhanced mode is characterized in that persulfate agents are added into a water body containing iodine-containing contrast agents, and a laser ultraviolet light source is adopted for irradiation, so that the iodine-containing contrast agents in the water body can be removed in a powerful reaction mode.
Furthermore, the laser ultraviolet light source is a deep ultraviolet laser light source with the wavelength of 250-280 nm, the output power is adjustable, and the maximum output power is not lower than 30 mW.
Furthermore, the power regulation range of the laser ultraviolet source during irradiation is 20-30 mW.
Further, the persulfate medicament is one or the combination of two of sodium persulfate and potassium persulfate.
Further, the adding amount of the persulfate medicament meets the following requirements: the molar ratio of the persulfate medicament to the iodo-substituted contrast agent is 100-150: 1.
Further, the pH value of the reaction solution was controlled to 3 to 9.
Further, the laser ultraviolet light source is positioned above the liquid level of the water body containing the iodine-containing contrast agent to be treated, the irradiation direction is from top to bottom, and the height of the laser ultraviolet light source from the liquid level is not more than 20 cm.
Further, the depth of the solution of the water body to be treated, which contains the iodinated contrast agent, is not more than 15 cm.
The invention requires the wavelength of the laser ultraviolet light source to be 250-280 nm in the treatment process, the wavelength range is the absorption wavelength range of persulfate, and other laser ultraviolet light sources with the wavelength of more than 280nm or less than 250nm cannot effectively activate persulfate. In addition, if the amount of persulfate to be added and the pH of the reaction system are not within the above-mentioned ranges, the optimum activating effect cannot be obtained. The irradiation mode of the light source directly influences the irradiation intensity and the irradiation effect, so that the persulfate can be highly activated to achieve efficient removal of pollutants when the defined height is not more than 20cm and the defined solution depth is not more than 15 cm.
Compared with the prior art, the invention has the following advantages:
(1) the invention is based on a novel technology for activating persulfate by using a laser ultraviolet light source, can efficiently remove iodo-contrast agents in water, greatly shortens the reaction time compared with a traditional advanced oxidation mode excited by a low-pressure or medium-pressure ultraviolet light source, shortens the traditional ultraviolet contact time to a unit of second, and effectively overcomes the problems of short hydraulic retention time and insufficient ultraviolet irradiation contact time in practical engineering application.
(2) The invention adopts the technology of activating the persulfate by the laser ultraviolet, can obviously improve the utilization rate of the persulfate medicament and avoid excessive medicament loss caused by insufficient irradiation time.
(3) The laser ultraviolet activation persulfate technology adopted by the invention can obviously improve the mineralization degree of the target pollutant iodo-substituted contrast agent and directly oxidize more pollutants into CO2And H2O, the safety risk of the intermediate product is reduced, and the generation amount of toxic disinfection byproducts caused by three causes in the subsequent chlorination disinfection process is reduced.
(4) The laser ultraviolet activation persulfate technology adopted by the invention is not only suitable for quickly removing the non-ionic iodo-contrast agent, but also suitable for the ionic iodo-contrast agent.
(5) The invention adopts the technology of activating persulfate by laser ultraviolet, has wider applicable pH range, can be carried out at normal temperature and normal pressure, easily meets the reaction conditions, and is simple, convenient and quick to operate.
Drawings
FIG. 1 is a graph showing the effect of laser UV-activated persulfate on the removal of three iodinated contrast agents (iohexol, iopamidol, sodium diatrizoate);
FIG. 2 shows the efficiency of laser UV and conventional low-pressure UV to degrade iohexol in the same time period for the respective activation of persulfate;
FIG. 3 shows the mineralization rate of iohexol and the consumption of persulfate by laser UV and traditional low-pressure UV activation, respectively;
FIG. 4 is a graph of the degradation efficiency of three iodinated contrast agents as a function of reaction time;
FIG. 5 is a graph of the degradation efficiency of three iodinated contrast agents as a function of reaction time.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
In the following embodiments, the wavelength of the laser ultraviolet lamp in the embodiments is 266nm commonly used in the market, and the wavelength of the low-pressure ultraviolet lamp is 254nm by using a traditional mercury lamp; the reaction container is a cylindrical open container, the laser ultraviolet light source is positioned above the liquid level, the irradiation direction is from top to bottom, the distance between the light source and the liquid level is not more than 20cm, and the depth of the solution in the container is not more than 15 cm.
The remainder, unless otherwise indicated, are all conventional commercial materials or conventional processing techniques in the art.
Example 1
A solution containing an iodo-based contrast agent (iohexol, iopamidol, sodium diatrizoate) at a concentration of 10. mu.M was adjusted to pH 7, sodium persulfate was added to the solution at a concentration of 1.0mM, the power of a laser ultraviolet lamp was adjusted to 20mW, and the reaction times were controlled to 5s, 10s, 20s, 30s, and 40 s. The degradation rates of the three iodinated contrast agents as a function of reaction time are shown in FIG. 1.
From fig. 1, it can be seen that the laser ultraviolet activated persulfate has higher removal efficiency for three iodo-based contrast agents within 40 s. Wherein the degradation efficiency of iohexol is the highest and can reach 94%; the degradation efficiency of sodium diatrizoate of difficultly degraded ionic type can reach 61.7 percent within 40 s. Therefore, the laser ultraviolet activated persulfate can remove the iodo-based contrast agent in water in a strengthened way within 40s, the reaction time is short, and the degradation efficiency is high.
Example 2
An iodo-contrast agent was selected, taking iohexol as an example, by adjusting a solution containing iohexol at a concentration of 10 μ M to pH 7, adding sodium persulfate to the solution to a concentration of 1.0mM, adjusting a laser ultraviolet lamp (power controlled at 20mW) and a low pressure ultraviolet lamp (maximum light intensity is ensured as much as possible), and controlling the reaction time at 10, 20, 30 and 40 s. The degradation rate of iohexol in different systems as a function of reaction time is shown in figure 2.
From fig. 2, it can be seen that the removal rate of the laser ultraviolet activated persulfate on iohexol can reach about 93% within 40s, whereas the traditional low-pressure ultraviolet light source is limited by the output irradiation intensity, and the persulfate cannot be efficiently activated to remove iohexol within a short time (the removal rate is only about 5%). This shows that the present invention has significant advantages for practical water treatment projects with short hydraulic retention times, and can achieve efficient removal of iodo-developer contaminants in a very short time.
Example 3
An iodo-contrast agent was selected, and in the case of iohexol, a solution containing iohexol at a concentration of 10 μ M was adjusted to pH 7, sodium persulfate was added to the solution to a concentration of 1.0mM, a laser ultraviolet lamp and a low-pressure ultraviolet lamp were adjusted, the same ultraviolet irradiation dose (light intensity × irradiation time) was controlled, and the total mineralization of the reaction solution and the consumption of sodium persulfate were measured. The mineralization rate of iohexol and the consumption of sodium persulfate as a function of reaction time in different systems are shown in FIG. 3.
It can be seen from fig. 3 that under the condition of the same ultraviolet dose, the mineralization rate of the laser ultraviolet activated persulfate on iohexol is obviously higher than that of a low-pressure ultraviolet light source, and the higher the ultraviolet dose is, the more obvious the amplification is; and under the same ultraviolet dose, the consumption of the persulfate under the laser ultraviolet activation is higher, which indicates that the medicament is more fully utilized.
Example 4:
most of them were the same as in example 1, except that the pH of the reaction solution in this example was controlled to 3.0. The degradation efficiency of three iodinated contrast agents as a function of reaction time is shown in fig. 4.
From fig. 5, it can be seen that the laser uv activated persulfate can still maintain the removal efficiency of three iodo-based contrast agents within 40s when the pH is controlled at 3.0. Wherein the degradation efficiency of iohexol is the highest and can reach 83%; the degradation efficiency of sodium diatrizoate of difficultly degraded ionic type can reach 60.9 percent within 40 s.
Example 5:
most of them were the same as in example 1, except that the pH of the reaction solution in this example was controlled to 9.0. The degradation efficiency of three iodinated contrast agents as a function of reaction time is shown in fig. 5.
From fig. 1, it can be seen that the laser uv activated persulfate can still maintain the removal efficiency of three iodo-based contrast agents within 40s when the pH is controlled at 9.0. Wherein the degradation efficiency of iohexol is the highest and can reach 73 percent; the degradation efficiency of sodium diatrizoate of difficultly degraded ionic type can reach 52 percent within 40 s. Therefore, the laser ultraviolet activated persulfate can intensively remove the iodo-substituted contrast agent in water within the pH range of 3.0-9.0, and has short reaction time and high degradation efficiency.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (8)
1. A method for removing iodinated contrast media in water in an enhanced mode is characterized in that persulfate agents are added into a water body containing iodinated contrast media, and the iodinated contrast media in the water body are removed in a powerful reaction mode through irradiation of a laser ultraviolet light source.
2. The method for removing iodo-substituted contrast medium in water in an enhanced manner according to claim 1, wherein the laser ultraviolet light source is a deep ultraviolet laser light source with the wavelength of 250-280 nm, the output power is adjustable, and the maximum output power is not lower than 30 mW.
3. The method for removing iodo-substituted contrast medium in water in an enhanced manner according to claim 2, wherein the power of the laser ultraviolet light source is adjusted within a range of 20-30 mW.
4. The method for enhanced removal of iodo-based contrast agents in water according to claim 1, wherein said persulfate salt is one or a combination of sodium persulfate or potassium persulfate.
5. The method for enhanced removal of iodo-based contrast media in water according to claim 1, wherein the persulfate compound is added in an amount satisfying: the molar ratio of the persulfate medicament to the iodo-substituted contrast agent is 100-150: 1.
6. The method for enhanced removal of iodo-substituted contrast agents in water according to claim 1, wherein the pH of the reaction solution is controlled to 3-9.
7. The method for removing iodine-containing contrast agent in water in an enhanced manner according to claim 1, wherein the laser ultraviolet light source is positioned above the liquid level of the water body containing iodine-containing contrast agent to be treated, the irradiation direction is from top to bottom, and the height of the laser ultraviolet light source from the liquid level is not more than 20 cm.
8. The method for enhanced removal of iodinated contrast media in water of claim 1, wherein the water body to be treated contains iodinated contrast media at a solution depth of no more than 15 cm.
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| CN113087116A (en) * | 2021-04-21 | 2021-07-09 | 上海应用技术大学 | Method for removing high-stability iodinated developer in water |
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