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Water treatment method capable of controlling iodination disinfection by-products by catalyzing ozone oxidation of hardly-degradable iodinated organic matters via persulfate

A technology of disinfection by-products and persulfate, applied in special compound water treatment, oxidized water/sewage treatment, water/sewage treatment, etc. The effect of upgrading and transformation, obvious inhibition effect and simple process operation

Inactive Publication Date: 2016-10-26
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the existing refractory iodinated organic substances (mainly referring to iodinated contrast agents) that widely appear in various water bodies, which lead to high content of iodized by-products in the disinfection process of chlorine and chloramines, and the removal effect is not good. to provide a water treatment method that uses persulfate to catalyze ozonation to oxidize refractory iodinated organics to control iodized disinfection by-products

Method used

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  • Water treatment method capable of controlling iodination disinfection by-products by catalyzing ozone oxidation of hardly-degradable iodinated organic matters via persulfate
  • Water treatment method capable of controlling iodination disinfection by-products by catalyzing ozone oxidation of hardly-degradable iodinated organic matters via persulfate
  • 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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specific Embodiment approach 1

[0019] Specific embodiment one: the present embodiment utilizes persulfate to catalyze ozone oxidation refractory iodide organic matter to control the water treatment method of iodo disinfection by-products to implement according to the following steps:

[0020] Ozone is introduced into the ozone contact reactor containing the water to be treated containing iodized organic matter, and the residence time of the water to be treated in the ozone contact reactor is controlled under stirring conditions to be 1min to 60min, and a persulfate catalyst is added. The treated water body is treated by stirring reaction, and then the treated water body is disinfected with chlorine or chloramine, that is, the water treatment method of using persulfate to catalyze ozone oxidation to degrade refractory iodized organic matter and control the generation of iodized by-products is completed;

[0021] Wherein said persulfate catalyst is a mixed catalyst of persulfate, persulfate or both, and the ra...

specific Embodiment approach 2

[0024] Embodiment 2: This embodiment differs from Embodiment 1 in that the water to be treated is hospital wastewater containing refractory iodide organics, reverse osmosis concentrated water, source water or filtered water. Other steps and parameters are the same as those in Embodiment 1.

[0025] The source water mentioned in this embodiment includes source water for emergency treatment of sudden pollution of iodized contrast medium.

specific Embodiment approach 3

[0026] Specific embodiment three: what this embodiment is different from specific embodiment one or two is to pass into ozone in the ozone contact reactor containing refractory iodinated organic matter to be treated water, and the initial concentration of control ozone is 1mg / L~ 50mg / L. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a water treatment method using catalysis of ozone and provides a water treatment method capable of controlling iodination disinfection by-products by catalyzing ozone oxidation of hardly-degradable iodinated organic matters via persulfate. The objective of the invention is to overcome the common problem of high iodination by-product content of chlorine and chloramine disinfection due to poor removal effect on hardly-degradable iodinated organic matters in a variety of water bodies in the prior art. The water treatment method capable of controlling the iodination disinfection by-products comprises the following steps: introducing ozone into an ozone contact reactor, adding a persulfate catalyst under stirring conditions and carrying out a stirring reaction so as to obtain a treated water body. The method provided by the invention employs a green catalyst, i.e., persulfate, so secondary pollution is not posed to the environment; and persulfate is used for catalyzing ozone for generation of free radicals, so the removal rate of organic iodine is substantially increased, organic iodine is converted into inorganic iodide ions, and obvious inhibition effect is exerted on iodination by-products, wherein the generation rates of iodo-trihalomethane and total iodine can be reduced by 60 to 80% and 40 to 70%, respectively.

Description

technical field [0001] The invention relates to a water treatment method for controlling iodized disinfection by-products by oxidizing refractory iodized organic matter (especially iodized contrast agent). Background technique [0002] At present, more than 90% of the refractory organic iodine in surface water and sewage comes from iodinated contrast agents and other refractory iodinated organic substances formed through biotransformation. Iodinated contrast agent is a kind of chemical preparation to enhance the observation effect of a certain visceral tissue or cavity image in clinical examination and treatment. It is one of the most commonly used drugs in the field of interventional radiology. contrast display. Iodinated contrast agents are widely used in human medical treatment, and their market demand is increasing day by day. The global annual sales volume can reach 3,500 tons. 95% of iodinated contrast agents cannot be metabolized by the human body and are directly di...

Claims

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Application Information

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IPC IPC(8): C02F1/78C02F1/72C02F101/36
CPCC02F1/78C02F1/725C02F2101/36C02F2303/18C02F2305/023
Inventor 马军刘冠琦杨一吕兴霖刘伟利江进庞素艳
Owner HARBIN INST OF TECH
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