Method for removing antibiotics from water by means of UV/TiO2/H2O2

A technology for antibiotics and water removal, applied in the field of water treatment, can solve the problems of not fully meeting drinking water standards, and biological treatment methods cannot function, and achieve the effects of fast degradation rate, low raw material cost, and high degradation efficiency.

Inactive Publication Date: 2016-09-28
INTEGRATION TECH SERVICE CENT OF ZIBO ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the removal of antibiotics in water, especially drinking water, at home and abroad mainly relies on conventional aerobic, anaerobic or anaerobic plus aerobic biological treatment methods, but due to the resistance of antibiotics, biological treatment methods cannot be fully utilized. Effect, after treatment, it cannot fully meet the drinking water standard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment provides a method using UV / TiO 2 / H 2 o 2 The method for jointly removing antibiotics in water comprises the steps:

[0026] (1) Persulfate is mixed with pretreatment waste water: with penicillin, amoxicillin, ciprofloxacin, the waste water of the total concentration of four class antibiotics of ofloxacin being 60mg / L as pretreatment waste water, to described pretreatment waste water Add sodium persulfate to the wastewater treatment, the mass ratio of the sodium persulfate to the pretreated wastewater is 1:300, and stir for 90min at a stirring speed of 260r / min to obtain a mixed solution;

[0027] (2) Adjust pH: at a stirring speed of 150r / min, use [H + ] is the mixed acid solution of 1mol / L perchloric acid and chloric acid and [OH - ] is 1mol / L sodium hydroxide solution and adjusts the pH value of the mixed solution described in step (1) to 6.5 to obtain a mixed solution after adjusting the pH;

[0028] (3) Use ultraviolet light to irradiate the wa...

Embodiment 2

[0031] This embodiment provides a method using UV / TiO 2 / H 2 o 2 A method for jointly removing antibiotics in water, comprising the steps of:

[0032] (1) Mix persulfate with pretreatment wastewater: use wastewater containing roxithromycin, clarithromycin, amikacin, and amphotericin with a total concentration of 300 mg / L as pretreatment wastewater , adding potassium persulfate to the pretreated wastewater, the mass ratio of the potassium persulfate to the pretreated wastewater is 1:800, and stirred for 60min at a stirring speed of 350r / min to obtain a mixed solution;

[0033] (2) Adjust pH: at a stirring speed of 200r / min, use [H + ] is the mixed acid solution of 50mol / L chlorous acid and hypochlorous acid and [OH - ] adjusting the pH value of the mixed solution described in step (1) to 9 for the mixed lye of sodium hydroxide and potassium hydroxide of 50mol / L to obtain the mixed solution after adjusting the pH;

[0034] (3) Use ultraviolet light to irradiate the water bo...

Embodiment 3

[0037] This embodiment provides a method using UV / TiO 2 / H 2 o 2 A method for jointly removing antibiotics in water, comprising the steps of:

[0038](1) Persulfate is mixed with pretreatment wastewater: the wastewater containing sulfadiazine, tetracyclines and chloramphenicols with a total concentration of 120 mg / L is used as pretreatment wastewater, and persulfuric acid is added to the pretreatment wastewater Sodium and potassium persulfate are formed with the mixture of mass ratio 1:1, the mass ratio of the total mass of described sodium persulfate and potassium persulfate and pretreatment waste water is 1:500, stir 75min with the stirring speed of 300r / min, to obtain a mixed solution;

[0039] (2) Adjust pH: at a stirring speed of 180r / min, use [H + ] is the mixed acid solution of 25mol / L perchloric acid and hypochlorous acid and [OH - ] adjust the pH value of the mixed solution described in step (1) to 7 for the mixed lye of sodium hydroxide and potassium hydroxide o...

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Abstract

The present invention relates to a kind of using UV / TiO 2 / H 2 o 2 Combined method of removing antibiotics in water, by first adding persulfate to pretreated wastewater to obtain a mixed solution, then using acid or lye to adjust the pH of the mixed solution, and then using 200nm-300nm ultraviolet light to adjust the pH The mixed solution is irradiated for the first time. After the first ultraviolet light irradiation is completed, nano-titanium dioxide and hydrogen peroxide are added to the mixed solution and the second irradiation is performed with 280-350nm ultraviolet light, thereby utilizing UV / TiO 2 / H 2 o 2 The formed composite synergistic system degrades the antibiotics in the water, and finally obtains the water from which the antibiotics are removed. The process of the present invention degrades the antibiotics in the waste water, which not only has a fast degradation rate, a high degradation efficiency, a good degradation effect, and low raw material cost, The by-products are non-toxic and can effectively control the concentration of antibiotics in water.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to a UV / TiO 2 / H 2 o 2 Combined methods for removing antibiotics from water. Background technique [0002] Antibiotics in the water environment have attracted more and more attention. They mainly come from the incomplete treatment of medical wastewater and the discharge or release of residual antibiotics in biological sludge to surface water, thereby polluting environmental water bodies. In addition, manure runoff is also Major source of antibiotics present in water bodies. In recent years, residual antibiotics in the water environment have been detected in sewage and surface water in China, Europe, and the United States. The concentration reaches nanograms per liter to micrograms per liter, and the concentration will increase hundreds of times after enrichment in water. . [0003] Even at low concentrations, antibiotics in water will have an impact on the ecological en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08
CPCC02F9/00C02F1/32C02F1/5236C02F1/66C02F1/722C02F1/725C02F2305/10
Inventor 张苗张丽王辉王洪海王丽虹
Owner INTEGRATION TECH SERVICE CENT OF ZIBO ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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