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Method for photochemical degradation of sulfonamide in water by using freshwater algae

A freshwater algae, photochemical technology, applied in chemical instruments and methods, light water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problems of metal catalytic media entry, not much, aquatic animals and plants harm, etc., to save operation effect of cost

Inactive Publication Date: 2015-04-29
张军伟 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, photochemical methods mostly use metals as catalytic media, but it is easy to cause metal catalytic media to enter the treated water in different valence states, causing potential harm to aquatic animals and plants in receiving water bodies. Therefore, photochemical ecological methods are the development direction for degrading drugs in water.
However, there are not many studies on the degradation of organic matter in water by photochemical ecological methods, and there are few reports on antibiotic substances with pharmaceutical activity in water.

Method used

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  • Method for photochemical degradation of sulfonamide in water by using freshwater algae
  • Method for photochemical degradation of sulfonamide in water by using freshwater algae
  • Method for photochemical degradation of sulfonamide in water by using freshwater algae

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Fill 3L of sulfadiazine wastewater in the storage tank (length 20cm, width 20cm, height 15cm), adjust the pH value to about 6, add a certain amount of algae (2 × 10 9 algae cells / L), turn on the constant flow pump to make the wastewater to be treated enter the reactor at a flow rate of 0.3L / min.

[0027] Step 1 Turn on the circulating water pump to maintain the jacket water circulation of the quartz reactor, the circulating water flow rate is 1L / min, and the aqueous solution in the reactor is maintained at room temperature (about 25°C).

[0028] Step 2 Turn on the air pump and adjust the rotameter connected to the reactor to be constant at 0.5 L / min.

[0029] Step 3: Turn on the control system, set the reaction time, alarm at intervals of 10 minutes to prompt sampling test, and then turn on the magnetic stirrer to stir the wastewater to be treated, and set the speed to 100 rpm.

[0030] After step 4 system is stable 1-2min, open the mercury lamp (power is 25W) in the r...

Embodiment 2

[0034] The storage tank (length 20cm, width 20cm, height 15cm) is equipped with 3L of sulfamethoxine wastewater, the pH value is adjusted to about 6, and a certain amount of algae (2 × 10 9 algae cells / L), turn on the constant flow pump to make the wastewater to be treated enter the reactor at a flow rate of 0.3L / min.

[0035] Step 1 Turn on the circulating water pump to maintain the jacket water circulation of the quartz reactor, the circulating water flow rate is 1L / min, and the aqueous solution in the reactor is maintained at room temperature (about 25°C).

[0036] Step 2 Turn on the air pump and adjust the rotameter connected to the reactor to be constant at 0.5 L / min.

[0037] Step 3: Turn on the control system, set the reaction time, alarm at intervals of 10 minutes to prompt sampling test, and then turn on the magnetic stirrer to stir the wastewater to be treated, and set the speed to 100 rpm.

[0038] Step 4: After the system is stable for 1-2 minutes, turn on the mer...

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Abstract

The invention relates to a method for photochemical degradation of sulfonamide in water by using freshwater algae. A sulfonamide in water is degraded by utilizing active oxygen produced by the freshwater algae. The specific implementation method is as follows: wastewater to be treated is introduced into a reactor in a circulating way, and the active oxygen matter produced by light radiation on the freshwater algae is used for degrading the sulfonamide when the ventilatory capacity is 0.5L / min and the pH value is 6 at certain alga concentration and temperature. The reaction time is prolonged, the concentration of the sulfonamide is reduced, and the effluent which meets the requirements can be finally achieved.

Description

technical field [0001] The invention relates to a method for photochemically degrading sulfa drugs in water by freshwater algae, and provides an environmentally friendly, efficient and cheap photochemical ecological method for repairing polluted water bodies. Background technique [0002] Sulfonamides are a class of drugs widely used to treat infections. After humans and animals take sulfa drugs, the unmetabolized part enters the water environment with excretion. In addition, with the development of intensive aquaculture, sulfa drugs are increasingly used as feed additives in aquaculture. Farmers sprinkle the feed directly on the water surface, and part of the feed containing the drug directly enters the water without being swallowed by animals. Therefore, certain concentrations of sulfa drugs have been detected in different regions and different water bodies, causing certain harm to the ecological environment of receiving water bodies. [0003] Photochemical methods have ...

Claims

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Application Information

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IPC IPC(8): C02F1/32C02F1/72C02F101/38
CPCC02F3/322C02F2101/40
Inventor 张军伟姜盼盼孙海建
Owner 张军伟
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