Device for removing iodo-X-ray contrast agent in water

An X-ray and contrast agent technology, which is applied in the field of devices for removing iodine X-ray contrast agents in water, can solve the problems of insufficient degradation, less treatment capacity, long residence time of water to be treated, etc., and achieves the effect of outstanding safety.

Inactive Publication Date: 2019-09-06
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above technical scheme, the residence time of the water to be treated should be kept longer during the ultraviolet irradiation process. If the residence time of the water to be treated is too short, the degradation will be insufficient, so the treatment amount per unit time of the ultraviolet degradation method is less

Method used

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  • Device for removing iodo-X-ray contrast agent in water
  • Device for removing iodo-X-ray contrast agent in water
  • Device for removing iodo-X-ray contrast agent in water

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The device for removing iodine X-ray contrast agents in water in this embodiment includes a three-section pipeline, a pretreatment component 1, an ozone oxidation component 2 and a post-oxidation component 3 connected in series;

[0034] The pretreatment component 1 is arranged on the first section of the pipeline, including a pH meter 12 and an acid / alkali dosing module 11, and the pH of the water to be treated is controlled by the acid / alkali dosing module 11 to be 5≤pH≤9 The acid / alkali dosing module 11 includes an acid and alkali liquid storage tank and a first metering pump, and the first metering pump is used to quantitatively pump the acid and alkali liquid into the first section of the pipeline. Acid solution is H 2 SO 4 Aqueous solution, alkaline solution is NaOH aqueous solution.

[0035] The ozone oxidation component 2 is arranged on the second section of the pipeline, including an ozone generator 21 and an ozone concentration detector 22, and the ozone gen...

Embodiment 2

[0040] Taking sodium diatrizoate as an example, pass drinking water containing a small amount of sodium diatrizoate into the device, adjust the raw water containing 10 μM sodium diatrizoate to pH = 7, control the temperature at 25°C, pass The purity of the ozone gas passed into the solution is 0.713 mg / L, and 7 mg / L chlorine is added to the reaction solution in the third section. The final generation of I-THMs is as follows figure 2 shown.

[0041]When no ozone pretreatment was carried out, sodium diatrizoate produced three kinds of I-THMs triiodomethane, dichloromonoiodomethane, monochlorodiiodomethane and trichloromethane through chlorination reaction; and after ozone oxidation pretreatment , only chloroform was detected in the disinfection by-products produced by 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 has slightly increase...

Embodiment 3

[0043] Taking sodium diatrizoate as an example, control the temperature of the raw water containing 10 μM sodium diatrizoate at 25°C, and adjust the pH of the reaction solution through the acid / alkali dosing module 11, and the pH values ​​are 5, 6, 7, and 8 respectively. , 9 o'clock, leading 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 liquid. The generation of I-THMs is as follows image 3 shown.

[0044] 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%. Overall, the solution in alkaline conditions is more conducive to the degradation of sodium dia...

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Abstract

The invention relates to a device for removing an iodo-X-ray contrast agent in water. The device comprises a three-segment-type pipe, a pretreatment assembly, an ozone oxidization assembly and a post-oxidization assembly which are in series connection in sequence; the pretreatment assembly is arranged on a first pipe segment and comprises a PH meter and an acid / alkaline liquid addition module; theozone oxidization assembly is arranged on a second pipe segment and comprises an ozone generator and an ozone concentration detector; the post-oxidization assembly is arranged on a third pipe segmentand comprises a chloracid addition device used for introducing a chloracid solution into water flowing through the ozone generation assembly. Compared with the prior art, the efficiency of treating the iodo-X-ray contrast agent by the device can reach 90% or above, the stable removal effect is achieved, and the practical application prospect is good; the PH is adjusted in the front segment, ozoneis introduced in the middle segment, chlorine is adopted for treatment in the back segment, and the treatment capacity per unit time is significantly increased.

Description

technical field [0001] The invention relates to the application field of water treatment, in particular to a device for removing iodine X-ray contrast agent 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 ICM, traditional...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/36
CPCC02F1/66C02F1/76C02F1/78C02F2101/36C02F2201/782
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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