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Method for promoting Fe(III)/H2O2 system to repair organism polluted water by utilizing protocatechuic acid

A protocatechuic acid and H2O2 technology, applied in the field of environmental chemistry, can solve the problems of difficult circulation and easy precipitation, and achieve the effects of no danger, simple operation, and improved degradation rate.

Active Publication Date: 2015-01-28
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventive method solves the problem of Fe in traditional Fenton and Fenton-like systems 3+ Easy to precipitate, and Fe 3+ / Fe 2+ Difficult to recycle, its use in the restoration of organic matter polluted water has the advantages of high efficiency, non-selectivity, environmental friendliness, and no secondary pollution.

Method used

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  • Method for promoting Fe(III)/H2O2 system to repair organism polluted water by utilizing protocatechuic acid
  • Method for promoting Fe(III)/H2O2 system to repair organism polluted water by utilizing protocatechuic acid
  • Method for promoting Fe(III)/H2O2 system to repair organism polluted water by utilizing protocatechuic acid

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Example 1 Treatment of Sewage Containing Rhodamine B

[0029] For the remediation of dye-contaminated water sources, rhodamine B aqueous solution with a concentration of 10 mg / L was used as the simulated wastewater. Take 20 mL of simulated wastewater, add protocatechuic acid, Fe 3+ Substances Ferric nitrate nonahydrate and H 2 o 2 , so that the concentrations were 0.1, 0.1 and 8 mmol / L, adding protocatechuic acid and Fe 3+ The initial pH value of the system after the substance is 3.2, and there is no need to adjust the pH additionally, and the solution is mixed evenly by stirring with a magnetic stirrer, and the rotation speed is 400 rpm. At the same time, no addition of protocatechuic acid was used as a control test, and the results are shown in figure 1 . figure 1 It was shown that the degradation rate of rhodamine B reached 60% after 0.5 min of reaction; when the reaction was extended to 5 min, the degradation rate of rhodamine B reached 96%.

Embodiment 2

[0030] Example 2 Treatment of Sewage Containing Atrazine

[0031] For the remediation of pesticide-contaminated water sources, atrazine aqueous solution with a concentration of 5 mg / L was used as the simulated wastewater. Take 20 mL of simulated wastewater, add protocatechuic acid, Fe 3+ Substances Ferric nitrate hexahydrate and H 2 o 2 , so that the concentrations were 0.4, 0.4 and 4 mmol / L, adding protocatechuic acid and Fe 3+ After the substance, the initial pH value of the system is 3.3, and there is no need to adjust the pH additionally, and the solution is mixed evenly by stirring with a magnetic stirrer. At the same time, no addition of protocatechuic acid was used as a control test, and the results are shown in figure 2 . figure 2 It was shown that the degradation rate of atrazine reached 75% after 0.5 min of reaction; when the reaction was extended to 5 min, the degradation rate of atrazine reached 98%.

Embodiment 3

[0032] Example 3 Treatment of Sewage Containing 4-Chlorophenol

[0033] For the remediation of pesticide-contaminated water sources, 4-chlorophenol aqueous solution with a concentration of 5 mg / L was used as the simulated wastewater. Take 20 mL of simulated wastewater, add protocatechuic acid, Fe 3+ Substances Iron Sulfate and H 2 o 2 , so that the concentrations were 0.1, 0.1 and 6 mmol / L, adding protocatechuic acid and Fe 3+ After the substance, the initial pH value of the system was 3.5, and there was no need to adjust the pH additionally. The solution was stirred with a magnetic stirrer to mix the solution evenly, and the rotation speed was 400 rpm. At the same time, no addition of protocatechuic acid was used as a control test, and the results are shown in image 3 . image 3 It was shown that the degradation rate of 4-chlorophenol reached 34% after 0.5 min of reaction; when the reaction was extended to 5 min, the degradation rate of 4-chlorophenol reached 97%.

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Abstract

The invention relates to a method for promoting an Fe(III) / H2O2 system to repair organism polluted water by utilizing protocatechuic acid. The method comprises the following steps: adding the protocatechuic acid and a Fe3+ substance into the organism polluted water to be repaired; and controlling the system to enable the system is under the acid condition, adding H2O2 to carry out repair of the organism polluted water. The method solves the problems of easiness for precipitation of Fe3+ and difficulty in circulation of Fe3+ / Fe2+ in conventional Fenton and Fenton-like systems and has the advantages of high efficiency, non preference, environmental-friendliness, no secondary pollution and the like when being used for repairing the organism polluted water.

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 the source of life and an essential resource for human survival and development. However, a large amount of domestic, industrial, and agricultural wastewater and wastes are discharged into the water, which far exceeds the self-purification capacity of the water body and leads to serious pollution of the water body. Organic pollutants in water bodies have attracted widespread attention because of their various types, complex components, and most of them are toxic. In particular, persistent organic pollutants are highly toxic, persistent, bioaccumulative, and have strong triple effects (carcinogenic, teratogenic, and mutagenic), ca...

Claims

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Application Information

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IPC IPC(8): C02F1/72
CPCC02F1/722C02F1/725C02F2101/30C02F2305/026
Inventor 张礼知秦雅鑫
Owner HUAZHONG NORMAL UNIV
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