CN109607857A - A method of effectively removing iodo x-ray contrast agent in water - Google Patents
A method of effectively removing iodo x-ray contrast agent in water Download PDFInfo
- Publication number
- CN109607857A CN109607857A CN201811555772.6A CN201811555772A CN109607857A CN 109607857 A CN109607857 A CN 109607857A CN 201811555772 A CN201811555772 A CN 201811555772A CN 109607857 A CN109607857 A CN 109607857A
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- CN
- China
- Prior art keywords
- iodo
- water
- contrast agent
- ray contrast
- effectively removing
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- 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.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
Abstract
The present invention relates to a kind of methods for effectively removing iodo x-ray contrast agent in water, the method that can control micro strong carcinogenic disinfection by-products iodo haloform to generate, using ozone as oxidant, by controlling reaction solution 5≤pH≤9, it stirs and evenly mixs, reaching reduces ICM concentration in water, and controls the purpose that I-THMs is generated in drinking water.Using there are ICM in method removal water body of the invention, without complicated operating process, the degradation efficiency under condition of different pH for ICM has different, but can avoid the generation of I-THMs.Product caused by reacting is mainly iodate ion etc..The invention is a kind of safe and stable drinking water treatment method.
Description
Technical field
The present invention relates to technical field of waste water processing, and in particular to a kind of to effectively remove iodo x-ray contrast agent in water
Method.
Background technique
Iodate x-ray contrast agent (ICM) is a kind of medical product, is widely used in hospital and medical centre medical imaging process
The middle comparison for increasing tissue and organ structure and details.The annual global consumption figure of ICM is about 3500 tons, the year estimation of ICM
Yield is more than 5000 tons.ICM is 2,4,6- iodo- benzene derivates, molecular structure be designed to it is inert, usually on phenyl ring
Side chain is introduced to increase the stability of substance and reduce toxicity.Dosage more than 95% is arranged in 24 hours by human body upon administration
It lets out and is eliminated, can detecte the concentration level of mg/L in the secondary effluent of hospital.Due to the stability of ICM, traditional is useless
Water treatment technology can not effectively remove ICM.Therefore, it in water treatment plant, is often detected in the waste water of surface water and raw drinking water
ICM.Monitoring shows that the concentration of ICM in surface water is concentrated mainly on 50~450ng/L.Although it is reported that ICM does not have toxicity work
With, but they are considered as the main source to form iodine in iodate haloform (I-THMs) and iodoacetic acid (I-HAAs),
They have high genetic toxicity and cytotoxicity.In addition, the stability of ICM can gradually accumulate in water environment, it is right
The harm of human body and environment can not look down upon.In recent years, detectable concentration of the ICM in water body is continuously improved, and makes us carrying on a shoulder pole to become
The emerging pollutant of sorrow, to cause the extensive research of countries in the world.
Common ICM mainly has 5 kinds, be respectively non-ionic Iohexol (iohexol), Iopamidol (iopamidol),
The Diatrizoate (diatrizoate) of Iopromide (iopromide), iomeprol (iomeprol) and ionic.State at present
The inside and outside iodo contrast agent in removal water body has Primary Study, and Diatrizoate is considered most stable of in municipal sewage
One of ICM, because it hardly passes through traditional wastewater treatment process degradation.In addition, research the result shows that chlorination, chloramines
Traditional chemistry in water treatment oxidation technology such as change is difficult to take effect to the removal of most of ICM, and only having Iopamidol among 5 kinds of ICM can
Effectively degraded.
Summary of the invention
The purpose of the present invention is to provide the methods that one kind effectively removes iodo x-ray contrast agent (ICM) in water, to drink
Water warfare provides application technology, and this method is simple and practical, engineer application easy to accomplish.
The purpose of the present invention is achieved through the following technical solutions:
A method of iodo x-ray contrast agent in water is effectively removed, the pH containing iodo x-ray contrast agent waste water is adjusted
It to 5-9, is continually fed into ozone gas and is pre-processed, chlorhexidine-containing disinfectant is then added and is handled.
Preferably, by the way that H is added2SO4Or the pH of NaOH control aqueous solution.
Preferably, the pH to 8-9 of waste water is adjusted, it is further preferred that the pH for adjusting waste water is 9.
Preferably, the ozone gas is generated by ozone generator, purity 0.516-1.316mg/L.
Preferably, the time for being continually fed into ozone gas is 20-60min, it is further preferred that being continually fed into ozone gas
Time be 30-45min.
Preferably, when being passed through ozone gas, gas flow rate 0.5L/min.
Preferably, the temperature of waste water is 20-30 DEG C.
Preferably, the dosage of chlorhexidine-containing disinfectant is 7mg/L, and the reaction time is 3h~3d.
The method of the present invention, which first passes through, to be passed through ozone gas and is pre-processed, then is added oxidant and reacted, and adjusting is passed through
Reaction solution pH and temperature, ICM is completely or partially oxidized removal in reaction solution, achievees the purpose that reduce ICM content in drinking water.
The present invention has strong oxidizing property using ozone, is configured to greatly destroy to the microbes in water, can be rapid
The microorganism caused a disease in drinking water is killed, but ozone is easily decomposed, and is needed ready-to-use.Due to the strong oxidizing property of ozone,
It can be with heavy metal, organic matter and the halide in oxidative degradation water, and in addition to this ozone can also be decolourized, deodorization, be de-tasted,
Ozone decomposes in water to be produced hydroxyl radical free radical (OH), and the oxidability of hydroxyl radical free radical is much higher than ozone.Study table
It is bright, when ozonisation sterilizes, it will not react with the organic matter in solution and generate halogenated disinfection by-products；With cholorination
It compares, the DBPs total amount of generation has also been lacked very much.
As the above scheme is adopted, the invention has the characteristics that:
1) control drinking water in ICM concentration, can reach within the scope of pH=5-9 higher ICM removal rate (>
70%), removal effect has certain stability.
2) operation of the present invention is simple, and used chemical reagent and material are water process conventional products, is not introduced into it
Its poisonous and harmful substance, safety are especially prominent.
3) reaction does not need to carry out under oxygen-free environment in the present invention, can pass through ozone and hydroxyl free under closed environment
The effect of base effectively removes the content of ICM, reduces the production quantity of I-THMs.
4) present invention can accomplish sharp again on heat using generated heat in other factory technics as heat source
With.
Detailed description of the invention
Fig. 1 is that the ozone of different purity is added to the effect picture for removing Sodium Amidotrizoate in water removal.
Fig. 2 is effect picture of the pre-ozonation to I-THMs production quantity during control cholorination.
Fig. 3 is that I-THMs is generated during different pH remove Sodium Amidotrizoate in water removal and control cholorination to pre-ozonation
The effect picture of amount.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
By taking Sodium Amidotrizoate as an example, adjust containing the raw water that concentration is 10 μM of Sodium Amidotrizoates to pH=7, controlled at 25
DEG C, it is passed through ozone gas into reaction solution and makes its mixing, reaction time 60min.It calculates, leads in solution by the purity of ozone
The ozone gas purity being passed through is respectively 0.342mg/L, 0.516mg/L, 0.713mg/L, 0.912mg/L, 1.134mg/L and
Under conditions of 1.316mg/L, Sodium Amidotrizoate degradation rate changes as shown in Figure 1 with the reaction time.
Under the conditions of the ozone gas of different purity adds as can be seen from Figure 1, the degradation of same reaction time Sodium Amidotrizoate
There are notable differences for rate.When the ozone gas purity being passed through reaches 0.516mg/L, degradation rate 31.1%；Later, it increases smelly
The purity of carrier of oxygen is a significant increase the degradation rate of Sodium Amidotrizoate, when ozone gas purity reaches 1.134mg/L, amidotrizoic acid
The degradation rate of sodium has been even more than 91.0%, increases ozone amount again later and degradation rate does not have significant changes.It follows that unit
The ozone amount and degradation rate that time passes through, which are presented, to be positively correlated, and is improved ozone gas purity and is conducive to the degradable of ICM, and works as
Ozone purity rises to the limit that 1.134mg/L basically reaches oxidability.
Embodiment 2
By taking Sodium Amidotrizoate as an example, adjust containing the raw water that concentration is 10 μM of Sodium Amidotrizoates to pH=7, controlled at 25
DEG C, it is passed through ozone gas into reaction solution and makes its mixing, is calculated by the purity of ozone, leads to the ozone gas being passed through in solution
Purity is 0.713mg/L, and after reacting 60min, 7mg/L chlorine is added into reaction solution.Under the conditions of 25 DEG C after chlorination reaction 3d, I-
The production quantity of THMs is as shown in Figure 2.
When not carrying out ozone pretreatment, Sodium Amidotrizoate generates three kinds of I-THMs (iodoformums, dichloro by chlorination reaction
One iodomethane, chlorodiiodomethane) and chloroform；And after the pretreatment Jing Guo ozone oxidation, solution is anti-through superchlorination
Chloroform has been only detected in disinfection by-products caused by answering.Compared with the solution after direct chlorination, although by ozone
Pretreated solution chloroform concentration generated after chlorination, which has, slightly to be improved, but avoids micro strong carcinogenic disinfection pair
The generation of product I-THMs has achieved the purpose that controlling I-THMs generates.
Embodiment 3
By taking Sodium Amidotrizoate as an example, control is 25 DEG C containing the raw water temperature that concentration is 10 μM of Sodium Amidotrizoates, adjusts reaction solution
PH be passed through ozone gas into reaction solution when pH is respectively 5,6,7,8,9 and make its mixing, by ozone purity calculate,
Leading to the ozone gas purity being passed through in solution is 0.713mg/L, and after reacting 60min, Sodium Amidotrizoate degradation rate is with the reaction time
Variation is as shown in Figure 3.Backward reaction solution in be added 7mg/L chlorine.Under the conditions of 25 DEG C after chlorination reaction 3d, the production quantity of I-THMs
As shown in Figure 3.
The degradation rate of Sodium Amidotrizoate is influenced by pH variation, and with the decline of pH value, the degradation rate of Sodium Amidotrizoate significantly drops
It is low.As pH=5, the degradation rate of Sodium Amidotrizoate only has 16.8%, and when pH=9, degradation rate is but up to 98.7%.It is overall and
Speech, solution are in alkaline condition and are then more advantageous to Sodium Amidotrizoate degradation.However, the variation of pH is to I-THMs in subsequent chlorination process
Production quantity have not significant impact, no matter how pH value (pH=5-9) in range changes, and is not detected three kinds of I-THMs'
It generates, in addition, the chloroform concentration generated is also held essentially constant, stablizes in the range of 20-25 μ g/L.Therefore, ozone
The generation of I-THMs in subsequent chlorination process can effectively be controlled while effectively degradation ICM by changing pretreatment.
The above description of the embodiments is intended to facilitate ordinary skill in the art to understand and use the invention.
Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein general
Principle is applied in other embodiments without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, ability
Field technique personnel announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be of the invention
Within protection scope.
Claims (10)
1. a kind of method for effectively removing iodo x-ray contrast agent in water, which is characterized in that adjust and contain iodo x-ray imaging
The pH to 5-9 of agent waste water, is continually fed into ozone gas and is pre-processed, and chlorhexidine-containing disinfectant is then added and is handled.
2. a kind of method for effectively removing iodo x-ray contrast agent in water according to claim 1, which is characterized in that logical
Cross addition H2SO4Or the pH of NaOH control aqueous solution.
3. a kind of method for effectively removing iodo x-ray contrast agent in water according to claim 1, which is characterized in that adjust
Save the pH to 8-9 of waste water.
4. a kind of method for effectively removing iodo x-ray contrast agent in water according to claim 1, which is characterized in that adjust
The pH for saving waste water is 9.
5. a kind of method for effectively removing iodo x-ray contrast agent in water according to claim 1, which is characterized in that institute
It states ozone gas to be generated by ozone generator, purity 0.516-1.316mg/L.
6. a kind of method for effectively removing iodo x-ray contrast agent in water according to claim 1, which is characterized in that hold
The continuous time for being passed through ozone gas is 20-60min.
7. a kind of method for effectively removing iodo x-ray contrast agent in water according to claim 6, which is characterized in that hold
The continuous time for being passed through ozone gas is 30-45min.
8. a kind of method for effectively removing iodo x-ray contrast agent in water according to claim 1, which is characterized in that logical
When entering ozone gas, gas flow rate 0.5L/min.
9. a kind of method for effectively removing iodo x-ray contrast agent in water according to claim 1, which is characterized in that useless
The temperature of water is 20-30 DEG C.
10. a kind of method for effectively removing iodo x-ray contrast agent in water according to claim 1, which is characterized in that chlorine
The dosage of disinfectant is 7mg/L, and the reaction time is 3h~3d.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811555772.6A CN109607857A (en) | 2018-12-19 | 2018-12-19 | A method of effectively removing iodo x-ray contrast agent in water |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811555772.6A CN109607857A (en) | 2018-12-19 | 2018-12-19 | A method of effectively removing iodo x-ray contrast agent in water |
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| CN109607857A true CN109607857A (en) | 2019-04-12 |
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| CN201811555772.6A Pending CN109607857A (en) | 2018-12-19 | 2018-12-19 | A method of effectively removing iodo x-ray contrast agent in water |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110204090A (en) * | 2019-05-31 | 2019-09-06 | 上海电力学院 | A kind of device removing iodo x-ray contrast agent in water removal |
| CN110272157A (en) * | 2019-07-31 | 2019-09-24 | 上海应用技术大学 | A kind of method that ultraviolet/chlorine dioxide group technology removes Iopamidol in water removal |
| CN114772702A (en) * | 2022-03-28 | 2022-07-22 | 上海电力大学 | Method for removing iohexol in water by using redox medium reinforced ferric oxide to catalyze ozone |
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| CN106045007A (en) * | 2016-08-12 | 2016-10-26 | 哈尔滨工业大学 | Water treatment method capable of controlling iodination disinfection by-products by catalyzing ozone oxidation of hardly-degradable iodinated organic matters via persulfate |
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| CN104609532A (en) * | 2015-02-11 | 2015-05-13 | 清华大学 | Method for removing PPCPs in treatment process of drinking water |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110204090A (en) * | 2019-05-31 | 2019-09-06 | 上海电力学院 | A kind of device removing iodo x-ray contrast agent in water removal |
| CN110272157A (en) * | 2019-07-31 | 2019-09-24 | 上海应用技术大学 | A kind of method that ultraviolet/chlorine dioxide group technology removes Iopamidol in water removal |
| CN114772702A (en) * | 2022-03-28 | 2022-07-22 | 上海电力大学 | Method for removing iohexol in water by using redox medium reinforced ferric oxide to catalyze ozone |
| CN114772702B (en) * | 2022-03-28 | 2023-10-24 | 上海电力大学 | Method for removing iohexol in water by catalyzing ozone through oxidation-reduction medium reinforced ferric oxide |
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Application publication date: 20190412 |