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Method for degrading iopromide-containing wastewater

An iopromide and wastewater technology, which is applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve problems such as corrosion of instruments and equipment, and achieve the advantages of reducing degradation cost, good degradation effect and good economic benefits. Effect

Inactive Publication Date: 2019-01-18
LIAONING UNIVERSITY
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Problems solved by technology

[0003] In the past, the persulfate reaction system was usually used to generate sulfate radicals. However, persulfate has strong oxidizing properties, and the best treatment effect must be carried out under acidic conditions, so it is corrosive to instruments and equipment.

Method used

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  • Method for degrading iopromide-containing wastewater
  • Method for degrading iopromide-containing wastewater
  • Method for degrading iopromide-containing wastewater

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Embodiment 1

[0024] Embodiment 1 A method for degrading iopromide wastewater

[0025] (1) Effect of pH value on degradation efficiency

[0026] Methods as below:

[0027] 1) Catalyst pretreatment: pass the ferrous sulfide through a 180-200 mesh standard sieve, and take the undersieve to obtain ferrous sulfide powder, which is set aside.

[0028] 2) Take 750 μL of iopromide stock solution with a concentration of 1 mg / mL and 1143 μL of sodium sulfite stock solution with a concentration of 22.05 mg / mL, dilute to volume in a 500 mL volumetric flask, shake and shake well.

[0029] 3) Adjust the circulating water machine to 25°C in advance. After the temperature reaches 25±2°C and stabilizes, pour all the solution in step 2) into the reactor, and adjust it with 0.25M sodium hydroxide or 0.25M sulfuric acid. The pH value of the mixed solution is 5, 7, 8, 9, 11, and then 0.5 g of ferrous sulfide is added. Stir continuously during this period to ensure that the reaction is fully uniform. After ...

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Abstract

The invention discloses a method for degrading iopromide-containing wastewater, and belongs to the field of treatment of organic wastewater. The method is characterized in that ferrous sulfide is usedas a catalyst, and sodium sulfite is used as an oxidant, so as to effectively degrade the iopromide. The method has the advantages that the organic pollutant, such as iopromide, can be effectively degraded, and the degrading rate can reach 90%; when the iopromide-containing wastewater is treated by the method, the investment of materials is low, the wastewater treatment effect is good, the speedis quick, and the good social and economic benefits are realized.

Description

technical field [0001] The invention relates to a method for synergistically degrading iopromide-containing wastewater by using FeS as a catalyst and sodium sulfite as an oxidant, belonging to the technical field of organic wastewater treatment. Background technique [0002] Iopromide is a typical ionic iodinated contrast agent (ICM), which is difficult to be decomposed and removed by microorganisms, and even the degradation rate of ICM by ozone process is not high, and ICM also has good tolerance, its unique The structural stability makes it also have good durability in the environment, which undoubtedly increases the difficulty of ICM processing. The degradation of iodinated contrast agents is mainly divided into two categories: biodegradation and advanced oxidation. Considering the pollution status and environmental content, the most economical and quickest way is the advanced oxidation method. The advanced oxidation method generates highly active free radicals (OH, SO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/72C02F101/38
CPCC02F1/66C02F1/725C02F2101/38
Inventor 于英潭刘琳王俭
Owner LIAONING UNIVERSITY
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