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Method for removing pollutants from drinking water by using supported ruthenium catalyst

A ruthenium catalyst and pollutant technology, applied in molecular sieve catalysts, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve the problem that homogeneous catalysts cannot be recycled and reused, target pollutants cannot be completely mineralized, and increase operating costs and other problems, to achieve the effect of easy solid-liquid separation, increase mineralization rate, and reduce dosage

Inactive Publication Date: 2013-01-16
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The supported ruthenium catalyst of the present invention can overcome the slow oxidation rate and low removal efficiency when potassium permanganate is oxidized to remove micro-pollutants alone, the target pollutants cannot be completely mineralized, and the homogeneous catalyst cannot be recycled and reused, and the introduction of secondary pollution Provide an efficient and sustainable method for the removal of micro-pollutants in water bodies

Method used

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  • Method for removing pollutants from drinking water by using supported ruthenium catalyst
  • Method for removing pollutants from drinking water by using supported ruthenium catalyst
  • Method for removing pollutants from drinking water by using supported ruthenium catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0041] (1) Put potassium permanganate and supported ruthenium catalyst into untreated reference water at the same time, wherein the dosage of potassium permanganate is controlled at 12 mg / L, and the supported ruthenium catalyst uses activated alumina as the carrier and trichloro Ruthenium oxide is used as an effective catalytic substance, the loading amount of ruthenium is 0.5%, and the dosage is controlled at 15 mg / L (calculated as ruthenium). The reaction is carried out in a mechanically stirred flocculation tank. The mechanically stirred flocculation tank used uses a horizontal stirring shaft, and the linear speed at the center of the impeller paddle is 0.4m / s for the first row, 0.3m / s for the second row, and 0.3m / s for the last row. Use 0.2m / s. The untreated drinking water containing aniline with an initial concentration of 0.5mg / L and pH=7 is treated for 0.5h. Compared with potassium permanganate oxidation, the aniline removal rate of this embodiment method can be increas...

Embodiment 2

[0044] The difference between this embodiment and Example 1 is that the dosage of potassium permanganate is 2.0 mgL, the supported ruthenium catalyst uses granular ferric hydroxide as a carrier, the ruthenium load is 0.2%, and the reactor adopts a folded plate flocculation tank ( The water has been stirred while flowing) Other steps and parameters are the same as in Example 1.

[0045] The water containing aniline with an initial concentration of 0.5 mg / L and pH=7 is treated for 0.5 h. Compared with potassium permanganate oxidation, the aniline removal rate of the method in this embodiment can be increased by 35%.

Embodiment 3

[0047] The difference between this embodiment and Example 1 is that the dosage of potassium permanganate is 3.0 mg / L, the ruthenium loading is 2%, the reactor uses a hydraulic flocculation tank, and other steps and parameters are the same as in Example 1.

[0048] The water containing aniline with an initial concentration of 0.5 mg / L and pH=7 is treated for 1 hour. Compared with potassium permanganate oxidation, the aniline removal rate of the method in this embodiment can be increased by 55%.

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Abstract

The invention belongs to the technical field of feedwater treatment, and relates to a method for removing pollutants from drinking water. The method comprises the following steps of (1) adding potassium permanganate and a supported ruthenium catalyst simultaneously to unprocessed drinking water, and putting the above mixture in a contact reactor for reaction; and (2) separating the reacted catalyst and water with a settling tank to obtain the processed water. The added supported ruthenium catalyst can increase the efficiency of removing micro-pollutants by potassium permanganate. The oxidation rate for phenyl amine substances, phenol endocrine interferents and benzotriazole light stabilizing agents is increased by 200-800%; and the removal efficiency is increased by 15-200%, after reacting for 0.5-2.0 h in a nearly neutral condition.

Description

technical field [0001] The invention belongs to the technical field of water supply treatment and relates to a method for removing pollutants in drinking water. Background technique [0002] With the development of economy and industry, the continuous pollution of water resources has become increasingly serious. At the same time, the improvement of living standards has also made people's requirements for the safety of drinking water increasingly stringent. The development of new materials and technologies has increased the types of pollutants in the water environment. Micro-pollutants in water such as anilines, phenolic endocrine disruptors and benzotriazole light stabilizers pose severe challenges to traditional water treatment processes. Challenges, domestic and foreign experimental research and actual production and operation results show that the removal rate of micro-pollutants in water bodies polluted by the above three types of substances can only reach 20-30% through...

Claims

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Application Information

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IPC IPC(8): C02F1/72B01J23/46B01J23/89B01J23/63B01J29/068
Inventor 乔俊莲关小红
Owner TONGJI UNIV
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