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Method for effectively removing iodinated X-ray contrast agent in water

An X-ray and water removal technology, which is applied in the field of effective removal of iodine X-ray contrast agents in water, can solve the problems of difficult ICM removal and achieve the effects of outstanding safety, reduced production, and simple operation

Inactive Publication Date: 2019-04-12
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the results of the study show that traditional water treatment chemical oxidation processes such as chlorination and chloramination are difficult to remove most ICMs, and only iopamidol can be effectively degraded among the five ICMs

Method used

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  • Method for effectively removing iodinated X-ray contrast agent in water
  • Method for effectively removing iodinated X-ray contrast agent in water
  • Method for effectively removing iodinated X-ray contrast agent in water

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Taking sodium diatrizoate as an example, adjust the raw water containing 10 μM sodium diatrizoate to pH = 7, control the temperature at 25°C, pass ozone gas into the reaction solution and mix it evenly, and the reaction time is 60 minutes. Calculated according to the purity of ozone, the purity of ozone gas passed into the solution is 0.342mg / L, 0.516mg / L, 0.713mg / L, 0.912mg / L, 1.134mg / L and 1.316mg / L respectively. , the degradation rate of sodium diatrizoate varies with the reaction time as figure 1 shown.

[0027] from figure 1 It can be seen that there are significant differences in the degradation rate of sodium diatrizoate at the same reaction time under the addition of ozone gas of different purity. When the ozone gas purity reached 0.516mg / L, the degradation rate was 31.1%; after that, increasing the ozone gas purity significantly increased the degradation rate of sodium diatrizoate, when the ozone gas purity reached 1.134mg / L , the degradation rate of sodium ...

Embodiment 2

[0029] Taking sodium diatrizoate as an example, adjust the raw water containing 10 μM sodium diatrizoate to pH = 7, control the temperature at 25°C, pass ozone gas into the reaction solution and mix it evenly, calculate according to the purity of ozone, The purity of the ozone gas introduced into the solution was 0.713 mg / L. After 60 minutes of reaction, 7 mg / L chlorine was added to the reaction solution. After the chlorination reaction at 25°C for 3 days, the amount of I-THMs produced is as follows figure 2 shown.

[0030] When no ozone pretreatment was performed, sodium diatrizoate produced three I-THMs (triiodomethane, dichloromonoiodomethane, monochlorodiiodomethane) and chloroform after chlorination; After treatment, only chloroform was detected as a disinfection by-product from the chlorination of the solution. Compared with the solution after direct chlorination, although the concentration of chloroform produced by the ozone pretreated solution after chlorination is ...

Embodiment 3

[0032] Taking sodium diatrizoate as an example, control the temperature of the raw water containing 10 μM sodium diatrizoate at 25°C, adjust the pH of the reaction solution, and pass through the reaction solution when the pH is 5, 6, 7, 8, and 9 respectively Enter ozone gas and make it mix, calculate by the purity of ozone, lead to the ozone gas purity that feeds in the solution is 0.713mg / L, after reacting 60min, sodium diatrizoate degradation rate changes with reaction time as follows image 3 shown. Then 7 mg / L chlorine was added to the reaction solution. After the chlorination reaction at 25°C for 3 days, the amount of I-THMs produced is as follows image 3 shown.

[0033] The degradation rate of sodium diatrizoate is affected by the change of pH. With the decrease of pH value, the degradation rate of sodium diatrizoate decreases significantly. When pH=5, the degradation rate of sodium diatrizoate was only 16.8%, but when pH=9, the degradation rate was as high as 98.7%....

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Abstract

The invention relates to a method for effectively removing iodinated X-ray contrast agent in water, which can control the generation of trace strongly carcinogenic disinfection by-product iodinated trihalomethane. The method takes ozone as oxidant, controls the pH of the reaction solution to be equal to or less than 9 and equal to or more than 5, the solution is subjected to stirring and mixing evenly, so as to reduce the concentration of ICM in water, and control the concentration of I-THMs in water. The method of the invention eliminates the ICM existing in the water body, does not need complicated operation process, has certain difference for the degradation efficiency of the ICM under different pH conditions, but can avoid the generation of I-THMs. The main products of the reaction areiodate ions and so on. The invention is a safe and stable drinking water treatment method.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for effectively removing iodine X-ray contrast agents in water. Background technique [0002] Iodinated X-ray contrast agents (ICMs) are a class of pharmaceutical products widely used in hospitals and medical centers to increase the contrast of tissue and organ structures and details during medical imaging. The annual global consumption of ICM is about 3500 tons and the estimated annual production of ICM is more than 5000 tons. ICM is a derivative of 2,4,6-iodo-benzene, its molecular structure is designed to be inert, and side chains are usually introduced on the benzene ring to increase the stability of the substance and reduce toxicity. More than 95% of the dose is eliminated through human excretion within 24 hours after administration, and the concentration level of mg / L can be detected in the secondary effluent of the hospital. Due to the stability of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/30
CPCC02F1/50C02F1/66C02F1/78C02F9/00C02F2101/30C02F2303/04
Inventor 胡晨燕侯元璋邓焰国华双静杜一凡张继晨任思橙
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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