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Method for photochemically degrading ciprofloxacin in water by using limnetic algae

A ciprofloxacin, freshwater algae technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of short half-life (several to ten hours, low metabolic rate, Water ecosystem hazards and other issues, to achieve the effect of semi-automatic and fully automated operations

Inactive Publication Date: 2014-07-30
JIANGNAN UNIV
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  • Summary
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  • Claims
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AI Technical Summary

Problems solved by technology

Ciprofloxacin has a short half-life (several to ten hours) and a low metabolic rate (25%-75%) in the organism. Part of ciprofloxacin is excreted from the organism in the form of the parent and enters the water environment. Sand stars pose potential hazards to aquatic ecosystems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] Fill 3L of ciprofloxacin 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.

[0017] 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).

[0018] Step 2 Turn on the air pump and adjust the rotameter connected to the reactor to be constant at 0.5 L / min.

[0019] Step 3 Turn on the control system, turn on the magnetic stirrer to stir the wastewater, and set the speed to 100 rpm.

[0020] Step 4 After the system is stable for 1-2 minutes, turn on the mercury lamp in the reactor (power is 25W), and after reaching the predetermined concentration (the degradation rate reaches...

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PUM

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Abstract

The invention discloses a method for photochemically degrading ciprofloxacin in water by using limnetic algae. Ciprofloxacin in water is degraded by means of oxidization of hydroxyl radicals generated by the limnetic algae. The method is concretely implemented as follows: circularly introducing wastewater to be treated to a reactor, and optically radiating the limnetic algae to generate hydroxyl radical substances to degrade ciprofloxacin at a certain alga concentration and temperature and under the conditions that the ventilation is 0.5L / min and the pH value is equal to 6. The reaction time is prolonged, the concentration of ciprofloxacin is reduced, and finally, the outer drainage meeting the requirement can be realized.

Description

technical field [0001] The invention relates to a method for photochemically degrading ciprofloxacin in water by freshwater algae, and provides a technology for repairing polluted water bodies by photochemical ecological method. Background technique [0002] Ciprofloxacin is a synthetic third-generation quinolone antibacterial drug with broad-spectrum antibacterial activity and good bactericidal effect. At present, ciprofloxacin is not only used for human and animal disease prevention, but also widely used as a feed additive in aquaculture to improve feed utilization and growth rate of sexual animals. Ciprofloxacin has a short half-life (several to ten hours) and a low metabolic rate (25%-75%) in the organism. Part of ciprofloxacin is excreted from the organism in the form of the parent and enters the water environment. Sand stars have caused potential harm to aquatic ecosystems. [0003] Algae are a class of eukaryotic microorganisms that are aquatic and capable of photos...

Claims

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Application Information

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IPC IPC(8): C02F3/32
Inventor 张军伟姜盼盼
Owner JIANGNAN UNIV
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