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Method for removing iopamidol in water through ultraviolet/chlorine dioxide combined process

A chlorine dioxide and combined process technology, applied in the field of water treatment, can solve the problems of unsatisfactory iopamidol removal effect, poor degradation effect, regular maintenance, etc., to improve feasibility and operability, and degrade Thorough and safe effect

Inactive Publication Date: 2019-09-24
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, relevant scholars have found that even the advanced oxidation technology can only oxidize and remove about 35%-55% of non-ionic ICM (such as iopamidol), the reaction rate is low, and the degradation effect is not good. [7]
However, the degradation of ICM by bioelectrochemical reduction has disadvantages: large infrastructure investment, high operating costs, regular maintenance, and 30%-60% degradation efficiency also limit the application of this method
The existing research methods are not ideal for the removal of iopamidol. Therefore, it is very important to find an effective treatment process to reduce the potential environmental risks of ICM and reduce the possibility of harm to human health. It is very important to study rapid and effective removal technologies.

Method used

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  • Method for removing iopamidol in water through ultraviolet/chlorine dioxide combined process
  • Method for removing iopamidol in water through ultraviolet/chlorine dioxide combined process
  • Method for removing iopamidol in water through ultraviolet/chlorine dioxide combined process

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Effect test

Embodiment 1

[0054] UV / ClO 2 The method for removing iopamidol from water by combined process, the specific steps are as follows:

[0055] Prepare the initial concentration of iopamidol with ultrapure water to 10μM, adjust the initial pH of iopamidol solution to 7.0 with acid-base solution, and add ClO to the iopamidol solution 2 , The dosage is [ClO 2 ] 0 =200μM, UV irradiation at the same time, control the UV intensity to 2.43mW / cm 2 , Control the reaction temperature to 25°C.

[0056] ClO alone 2 Process (Comparative Example 1), Single UV Process (Comparative Example 2) and UV / ClO 2 The concentration of iopamidol in the combined process (Example 1) varies with time as shown in figure 1 As shown,

[0057] It can be seen that the removal effect of iopamidol is different under different processes. UV / ClO 2 At the same time, it can greatly increase the removal rate of iopamidol. ClO alone 2 The degradation rate of iopamidol by the process is only 0.8%, which proves that ClO alone 2 The iopamidol ...

Embodiment 2

[0059] UV / ClO 2 The method for removing iopamidol from water by combined process, the specific steps are as follows:

[0060] Prepare the initial concentration of iopamidol with ultrapure water to 10μM, adjust the initial pH of iopamidol solution to 7.0 with acid-base solution, and add ClO to the iopamidol solution 2 , Respectively control the addition of ClO 2 The amount is [ClO 2 ] 0 =0μM, 50μM, 100μM, 200, 500μM, 1000μM, UV irradiation at the same time, control the UV intensity to 2.43mW / cm 2 , During the reaction, control the reaction temperature to 25℃, the degradation of iopamidol after 300s of reaction is as image 3 Shown.

[0061] From image 3 It can be seen that the removal efficiency of iopamidol increases with ClO 2 The increase in dosage increases. Under the same UV intensity, with ClO 2 The concentration increased from 0-1000μM, and the removal rate increased from 70.85% to 78.76%, indicating the increase of ClO 2 The dosage can promote the removal of iopamidol. This...

Embodiment 3

[0063] UV / ClO 2 The method for removing iopamidol from water by combined process, the specific steps are as follows:

[0064] Prepare the initial concentration of iopamidol with ultrapure water to 10μM, adjust the initial pH of iopamidol solution to 7.0 with acid-base solution, and add ClO to the iopamidol solution 2 , The dosage is [ClO 2 ] 0 =200μM, while UV irradiation, control the UV intensity to 0mW / cm 2 , 2.43mW / cm 2 , 4.94mW / cm 2 , 7.34mW / cm 2 , 9.76mW / cm 2 , Under the test condition that the reaction temperature is controlled to 25℃, the degradation of iopamidol after 300s reaction is detailed in Figure 4 .

[0065] Have Figure 4 It can be seen that the UV light intensity directly determines the production rate of ·OH in the system, and as the UV intensity increases, the photodegradation rate of iopamidol gradually increases. UV intensity is 9.76mW / cm 2 , The degradation rate of iopamidol reached 99.32% in only 150s. UV / ClO 2 The effectiveness of degrading iopamidol is as...

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Abstract

The invention relates to a method for removing iopamiol in water through the ultraviolet / chlorine dioxide combined process. The method specifically comprises the following steps that (1), a to-be-treated water sample is pre-treated; (2), a ClO2 solution is added in the water sample obtained after pretreatment in step (1), the pH value is adjusted, a photocatalytic oxidation reaction is conducted through ultraviolet irradiation, iopamidol in the water is removed. Compared with the prior art, the method is combined with the UV / ClO2 combination process, by adjusting the pH of a reaction water body, the content of iopamidol in the water body can be rapidly reduced, the removal effect can reach 99% or above, degradation is thorough, and the degree of mineralization is high, the potential risk that iopamidol existing in drinking water generates I-DBPs in the drinking water can be rapidly lowered, operation is easy, the reaction conditions are easy to control, applied chemical reagents and materials are conventional products for water treatment, other toxic and harmful substances are not introduced, the safety is particularly prominent, and the reaction environment is easy to achieve.

Description

Technical field [0001] The present invention relates to the technical field of water treatment, in particular to a method for removing iopamidol from water by an ultraviolet / chlorine dioxide combined process. Background technique [0002] Developers, also called contrast agents, are a class of substances in medicines and personal care products. It is taken or injected into the human body to enhance the image observation effect of soft tissues (such as organs, veins, arteries, etc.), as well as electronic computed tomography and magnetic resonance imaging enhancement detection, etc., and are widely used in the medical field [1] . The developer mainly includes iodine-based developer (ICM) and barium sulfate. ICM is a kind of organic iodine compound, which can be divided into ionic and non-ionic. Non-ionic ICM does not contain ionic groups and is hydrophilic. It mainly includes iopamidol and so on. ICM is an inert substance that diffuses from the plasma to the intercellular space ...

Claims

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Application Information

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IPC IPC(8): C02F9/08C02F101/36C02F101/34
CPCC02F9/00C02F1/001C02F1/66C02F1/32C02F1/725C02F1/76C02F2101/36C02F2101/34C02F2305/023C02F2209/06
Inventor 田富箱马世旭叶文凯孙远邢海波胡晓钧
Owner SHANGHAI INST OF TECH
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