Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for removing high-stability iodinated developer in water

A technology for removing water and developer, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc. The effect of reducing the concentration of harmful substances and outstanding practicality

Inactive Publication Date: 2021-07-09
SHANGHAI INST OF TECH
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional water treatment processes are generally used in the treatment of urban sewage, but due to its stable structure, the developer molecules such as iohexol are difficult to achieve the purpose of degradation and cannot meet the discharge requirements

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for removing high-stability iodinated developer in water
  • Method for removing high-stability iodinated developer in water
  • Method for removing high-stability iodinated developer in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A method for removing iodinated developer iohexol in water by a combined UV / peroxydisulfate process, comprising the following steps:

[0055] Use ultrapure water to prepare the initial concentration of iohexol to be 10 μM, add phosphate buffer solution, under the combined UV / peroxydisulfate process, use acid and alkali to adjust the initial pH of iohexol solution to 7, and add over Sodium sulfate, make the concentration of persulfate in the water sample be 200 μ M, carry out ultraviolet irradiation simultaneously, control ultraviolet irradiation intensity to be 2.43mW / cm 2 , the reaction temperature was controlled at 25°C.

[0056] The curves of the concentration of iohexol over time under the three processes of UV irradiation alone (comparative example 2), persulfate oxidation alone (comparative example 1) and UV / peroxydisulfate combined process (embodiment 1) are as follows figure 1 shown.

[0057] From figure 1 It can be seen that the removal effects of iohexol ar...

Embodiment 2

[0059] A method for removing iodinated developer iohexol in water by a combined UV / peroxydisulfate process, comprising the following steps:

[0060] Use ultrapure water to configure the initial concentration of iohexol to be 10 μM, add phosphate buffer solution to make the concentration in the reaction solution reach 10 mM, use acid and alkali to adjust the initial pH of the iohexol solution to 7, and add the iohexol solution to Add sodium persulfate to control its concentration in the water sample to be 100, 200, 300, 500 and 1000 μM respectively, and carry out ultraviolet irradiation at the same time, and control the ultraviolet intensity to 2.43mW / cm 2 , the removal rate of iohexol after 600s of reaction is detailed in figure 2 .

[0061] From figure 2 It can be seen that with the increase of the dosage of sodium persulfate, the removal rate of iohexol increases significantly. Under the condition that the ultraviolet intensity remains constant, as the dosage of sodium ...

Embodiment 3

[0063] A method for removing iodinated developer iohexol in water by a combined UV / peroxydisulfate process, comprising the following steps:

[0064] Use ultrapure water to configure the initial concentration of iohexol to be 10 μM, use acid and alkali solution to adjust the initial pH of iohexol solution to 7, add sodium persulfate to the iohexol solution to make the concentration in the water sample 200 μM, Simultaneously carry out ultraviolet irradiation, control the ultraviolet intensity to be 2.43, 4.94, 7.34 and 9.79mW / cm respectively 2 , at a temperature of 25°C, the degradation of iohexol after 600s of reaction is detailed in image 3 .

[0065] From image 3 It can be seen that the degradation rate of iohexol gradually increased with the gradual increase of the ultraviolet light intensity. When the intensity of ultraviolet light increases, the photon energy in the solution increases, and the SO 4 - The amount of other active substances is greatly increased, thereb...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for removing a high-stability iodination developer in water. The method comprises the following steps: (1) pretreating a water sample to be treated; and (2) adding persulfate into the pretreated water sample, adjusting the pH value, and carrying out photocatalytic oxidation reaction by adopting ultraviolet irradiation to remove the iodinated developer in the water. Compared with the prior art, the method has the advantages that the removal effect of iohexol can reach more than 95%, the concentration of harmful substances which are difficult to degrade in water is effectively reduced, the operation is simple, the reaction conditions are easy to control, the used chemical reagents and materials are conventional products for water treatment, other toxic and harmful substances are not introduced, the safety and the practicability are relatively outstanding, and the method is suitable for industrial production. The reaction environment is easy to realize, treatment can be performed at room temperature, and the feasibility and operability of the method are effectively improved.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method for removing highly stable iodinated developer in water. Background technique [0002] Iodinated contrast agent is currently one of the most inert and highly stable personal care products. It is widely used in soft tissue imaging (such as organs, veins, blood vessels, etc.) in medicine. Its molecular structure is stable, hydrophilic, polar Strong, low protein binding capacity, difficult to remove by conventional water treatment processes such as coagulation, filtration and even ozone oxidation. Although the iodinated developer itself is not toxic, the presence of the raw water can cause the formation of highly toxic iodine disinfection by-products during the chlorination and chloramination of drinking water. An important organic iodine source that generates iodo disinfection by-products during amination. Regarding organic iodine compounds such as iodinated deve...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C02F1/72C02F1/32C02F101/38C02F101/34
CPCC02F1/32C02F1/725C02F1/722C02F2101/34C02F2101/38C02F2305/02C02F2305/023
Inventor 叶文凯田富箱汪波谭钰鋆谢梦娇
Owner SHANGHAI INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com