Method for restoring organic matter polluted water body using ferrous oxalate-activated persulfate system

A technology for activating persulfate and ferrous oxalate, applied in the field of environmental chemistry, can solve the problems of non-recycling, easy precipitation, difficult recycling, etc., and achieves good activation effect, no danger, and easy synthesis.

Inactive Publication Date: 2016-09-28
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of the invention solves the problems that Fe(III) is easy to precipitate in the Fe(II) excited persulfate system, Fe(III) / Fe(II) is difficult to circulate and cannot be recycled and reused, and can improve the repair efficiency. It has the advantages of high efficiency, non-selectivity, environmental friendliness, and no secondary pollution for the remediation of organic matter polluted water bodies.

Method used

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  • Method for restoring organic matter polluted water body using ferrous oxalate-activated persulfate system
  • Method for restoring organic matter polluted water body using ferrous oxalate-activated persulfate system
  • Method for restoring organic matter polluted water body using ferrous oxalate-activated persulfate system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1 controls the sewage containing atrazine

[0035] For the remediation of pesticide-contaminated water sources, the aqueous solution of atrazine with a concentration of 20mg / L was used as the simulated wastewater. Take 50mL of simulated wastewater, add persulfate and ferrous oxalate to it, so that the concentrations are 1.0 and 0.5mmol / L respectively, the initial pH value of the system after adding persulfate and ferrous oxalate is 5.2, no need to adjust the pH additionally, Stir with a magnetic stirrer to mix the solution evenly, and the rotation speed is 400 rpm. At the same time, it is a control test without adding persulfate or ferrous oxalate, and the results are shown in figure 1 . figure 1 As shown, the degradation rate of atrazine reached 94% after 10 minutes of reaction; when the reaction was extended to 30 minutes, the degradation rate of atrazine reached 100%.

Embodiment 2

[0036] Embodiment 2 controls the sewage containing tetracycline

[0037]For the remediation of antibiotic-contaminated water sources, the tetracycline aqueous solution with a concentration of 20mg / L was used as the simulated wastewater. Take 50mL of simulated wastewater, add ferrous oxalate and persulfate to it to make the concentrations 0.5 and 1.0mmol / L respectively, the initial pH value of the system after adding persulfate and ferrous oxalate is 5.2, no need to adjust pH additionally, Stir with a magnetic stirrer to mix the solution evenly, and the rotation speed is 400 rpm. At the same time, it is a control test without adding persulfate or ferrous oxalate, and the results are shown in figure 2 . image 3 As shown, the degradation rate of tetracycline reached 94% after 20 minutes of reaction; when the reaction was extended to 30 minutes, the degradation rate of tetracycline reached 100%.

[0038] When the concentration of persulfate remains at 1.0mmol / L, adjust the co...

Embodiment 3

[0040] Embodiment 3 controls the sewage containing norfloxacin

[0041] For the remediation of antibiotic-contaminated water sources, the norfloxacin aqueous solution with a concentration of 20mg / L was used as the simulated wastewater. Take 50mL of simulated wastewater, add ferrous oxalate and persulfate to it to make the concentrations 0.5 and 1.0mmol / L respectively, the initial pH value of the system after adding persulfate and ferrous oxalate is 5.2, no need to adjust pH additionally, Stir with a magnetic stirrer to mix the solution evenly, and the rotation speed is 400 rpm. At the same time, it is a control test without adding persulfate or ferrous oxalate, and the results are shown in Figure 5 . Figure 5 As shown, after 2 minutes of reaction, the degradation rate of norfloxacin reached 84%; when the reaction was extended to 10 minutes, the degradation rate of norfloxacin reached 100%.

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Abstract

The invention relates to a method for using ferrous oxalate to activate a persulfate system to restore water bodies polluted by organic matter. The method is as follows: adding ferrous oxalate and persulfate substances to the water body polluted by organic matter to be repaired to repair the water body polluted by organic matter, and the molar ratio of the ferrous oxalate to the persulfate is 1:10-2:1. This method solves the problem that the activator in the traditional activated persulfate system cannot be recycled and reused, and has high restoration efficiency. It has the advantages of high efficiency, non-selectivity, environmental friendliness, and no secondary pollution when used in the restoration of organic matter-contaminated water bodies.

Description

technical field [0001] The invention belongs to the field of environmental chemistry, and in particular relates to a method for controlling and repairing organic pollutants in water bodies, which is suitable for the treatment of organic wastewater in the fields of printing and dyeing, agriculture and the like. Background technique [0002] Water is an important natural resource and the basis for human survival and development. With the rapid development of my country's economy, industry and agriculture, a large amount of sewage, waste, chemicals, etc. have been continuously discharged into natural water bodies, resulting in increasingly prominent water pollution problems. Among them, the organic pollutants in the water body are of various types and complex components, and most of them are characterized by high toxicity, refractory degradation, and persistence, which pose a major threat to human health and sustainable social development. [0003] The most notable feature of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F101/30
CPCC02F1/72C02F2101/30
Inventor 张礼知侯晓静
Owner HUAZHONG NORMAL UNIV
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