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Chemical for activating persulfate system by using green tea nano iron to repair organic polluted water body

A technology for activating persulfate and organic pollution. It is used in oxidation water/sewage treatment, polluted groundwater/leachate treatment, water pollutants, etc. It can solve the problems of large amount of iron salts and unrecyclable iron salts Achieve the effect of reducing salt content, high preparation cost and reducing dosage

Active Publication Date: 2019-12-03
INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The object of the present invention is to provide a medicament for remediating organically polluted water by using green tea nano-iron to activate persulfate system, which can significantly reduce the amount of ferrous sulfate and has high repair efficiency. It is highly efficient and non-selective for organic polluted water , environment-friendly, no secondary pollution, to solve the problem of large amount of iron salt and iron salt cannot be recycled in the existing ferrous ion activated persulfate process,

Method used

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  • Chemical for activating persulfate system by using green tea nano iron to repair organic polluted water body
  • Chemical for activating persulfate system by using green tea nano iron to repair organic polluted water body
  • Chemical for activating persulfate system by using green tea nano iron to repair organic polluted water body

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Embodiment 1

[0021] Embodiment 1: as figure 1 As shown, the reference number 1 is "adding green tea nano-iron suspension and persulfate successively to the organic polluted water body to be repaired"; reference number 2 is "the green tea nano-iron releases ferrous ions and the persulfate reaction to produce oxidative free radicals, the ferrous ion is converted into ferric iron after activating persulfate, and is further reduced to ferrous iron by the green tea extract to continue activating persulfate to produce oxidative free radicals. Part of the green tea extract will also directly activate persulfate to generate oxidative free radicals"; reference number 3 is "the generated oxidative free radicals degrade organic pollutants in the wastewater".

[0022] (1) A medicament for remediating organically polluted water bodies by using green tea nano-iron to activate persulfate system, and its components include green tea nano-iron suspension and persulfate (sodium persulfate). The preparation...

Embodiment 2

[0025] Embodiment 2: (one) the preparation method of the medicament that utilizes green tea nanometer iron to activate persulfate system to repair organic polluted water body is similar to (one) in embodiment 1, difference is the suspension of green tea nanometer iron in the present embodiment The amount of iron added in the water body (system) is 0.033mM, mM is mmol / L, the concentration of persulfate (potassium persulfate) is 5mM, and the molar ratio of persulfate to iron in the green tea nano-iron suspension is 151:1 , the volume ratio of the green tea extract to the ferrous sulfate solution is 4:1, and in the step of preparing the green tea extract, the amount of green tea per liter of deionized water is 50g.

[0026] (2) The following is the method of the present invention to restore rhodamine B polluted water bodies with green tea nano-iron activated persulfate under different persulfate concentrations.

[0027] The water body (reaction system) of 100mL contains Rhodamine...

Embodiment 3

[0028] Embodiment 3: (one) the preparation method of the medicament that utilizes green tea nanometer iron to activate persulfate system to repair organic polluted water body is similar to (one) in embodiment 1, difference is the suspension of green tea nanometer iron in the present embodiment The amount of iron added in the water body (system) is 0.033mM, mM is mmol / L, the concentration of persulfate (sodium persulfate) is 5mM, and the molar ratio of persulfate to iron in the green tea nano-iron suspension is 151:1 , the volume ratio of the green tea extract to the ferrous sulfate solution is 2.5:1, and in the step of preparing the green tea extract, the amount of green tea per liter of deionized water is 55g.

[0029] (2) The following is the method of the present invention to restore rhodamine B polluted water bodies with green tea nano-iron activated persulfate under different rhodamine B concentrations.

[0030] 100mL of water (reaction system) contains 0.033mM iron (gree...

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Abstract

The invention discloses a chemical for activating a persulfate system by using green tea nano iron to repair an organic polluted water body. The chemical comprises a green tea nano iron suspension andpersulfate. A preparation method of the green tea nano iron suspension comprises the following steps: preparing a green tea extract, namely putting green tea into deionized water, performing a reaction under a sealed condition, performing standing to room temperature, and performing vacuum suction filtration so as to obtain the green tea extract; preparing a ferrous sulfate solution, namely dissolving a solid, namely ferrous sulfate heptahydrate, into deionized water so as to obtain the ferrous sulfate solution; and preparing the green tea nano iron suspension, namely adding dropwise the green tea extract into the ferrous sulfate solution, performing stirring continuously, and reducing ferrous ions in the ferrous sulfate solution, so as to obtain the green tea nano iron suspension. By adopting the chemical, the amount of ferrous sulfate can be remarkably reduced, the repairing efficiency is high, the chemical has the characteristics of being high in efficiency, free of selectivity, environmentally friendly and free of secondary pollution when being applied to organic polluted water bodies, and the problems that a great number of iron salts are used and the iron salts cannot be recycled in a conventional process that persulfate is activated by using ferrous ions can be solved.

Description

technical field [0001] The invention relates to a medicament for repairing organically polluted water bodies, in particular to a medicament for repairing organically polluted water bodies by using green tea nano-iron to activate a persulfate system, and is suitable for the treatment of organically polluted water bodies in the fields of groundwater, printing and dyeing, and the like. Background technique [0002] The rapid expansion of industrial production has led to the generation of a large amount of refractory industrial wastewater. The existence of organic pollutants in water has brought serious threats to human health and ecological environment. Although H 2 o 2 The traditional advanced oxidation technology represented by advanced oxidation technology can realize the rapid degradation of most organic pollutants in water, but in practical applications there are also harsh pH requirements, H 2 o 2 Self-instability and the generated hydroxyl radicals (·OH) have short l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00C02F1/72C02F101/30C02F101/34C02F101/38C02F101/36C02F103/06
CPCC02F1/00C02F1/72C02F2101/30C02F2305/023C02F2101/38C02F2101/34C02F2101/36C02F2103/06
Inventor 王妍妍韩占涛张猛李卉张威孔祥科
Owner INST OF HYDROGEOLOGY & ENVIRONMENTAL GEOLOGY CHINESE ACAD OF GEOLOGICAL SCI
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