Bimetallic catalyst for degrading chlorine substitutional organic pollutant, preparation method and application

A bimetallic catalyst and a technology for organic pollutants, which are applied to the bimetallic catalyst for degrading chlorinated organic pollutants in water and the field of preparation thereof, can solve the problems of complex process, small processing volume and high cost, and achieve continuous and efficient degradation and moderate reduction activity. , the effect of large porosity

Inactive Publication Date: 2007-02-21
XINYI AGRI CHEM PLANT JIANGSU PROV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to propose an iron-nickel bimetallic catalyst for rapid degradation and dechlorination of chlorinated organic pollutants in water in order to overcome the problems of complex technical process, high cost, high energy consumption, and small processing capacity. Another object is to provide the preparation method and application of the above-mentioned bimetallic catalyst

Method used

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  • Bimetallic catalyst for degrading chlorine substitutional organic pollutant, preparation method and application
  • Bimetallic catalyst for degrading chlorine substitutional organic pollutant, preparation method and application
  • Bimetallic catalyst for degrading chlorine substitutional organic pollutant, preparation method and application

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Comparison scheme
Effect test

Embodiment 1

[0036] The method of the present invention is compared with the effect of prior art treatment containing tetrachlorethylene (PCE) waste water

[0037] (1) Water quality containing PCE wastewater

[0038] Concentration of PCE 142mg / L

[0039] pH 5.74

[0040] Cl - Concentration <2mg / L

[0041] (2) take by weighing three parts of iron filings of the same quality, the first part does not add catalyst nickel and modified zeolite, is simple iron filings, is called filler A; The concentration of the nickel solution is 0.4mol / L, the mass ratio of nickel and iron filings contained therein is 3:100, and the preparation time is 2h, and the obtained iron-nickel bimetallic filler B is composed of no modified zeolite; the third part The iron-nickel double metal is prepared by the liquid phase reduction method, the concentration of the nickel sulfate solution is 0.4mol / L, and the sodium dithionite is dissolved in the sodium hydroxide solution of 0.2mol / L to be configured to contain the ...

Embodiment 2

[0047] Embodiment 2 processes the waste water containing trichlorethylene (TCE) with the method of the present invention

[0048] (1) Water quality containing TCE wastewater

[0049] Concentration of TCE 37mg / L

[0050] pH 6.35

[0051] Cl - Concentration <2mg / L

[0052] (2) The iron-nickel double metal is prepared by the liquid phase reduction method. The concentration of the nickel chloride solution is 0.5mol / L, and sodium dithionite is dissolved in a 0.3mol / L sodium hydroxide solution to be configured to contain sodium dithionite as 0.75 mol / L alkaline solution, and then add iron filings with a particle size of 1 to 3 mm into the nickel chloride solution and stir rapidly. The mass ratio of nickel and iron filings contained in it is 5:100, and the reaction time is 1.5 at 40°C. h, then stand and filter, wash with deionized water to neutrality, and obtain iron-nickel bimetallic after dehydration and drying; soak and wash the natural zeolite with deionized water for 3 times...

Embodiment 3

[0058] Embodiment 3 processes the waste water containing tetrachloromethane (CT) with the method of the present invention

[0059] (1) Water quality containing CT wastewater

[0060] The concentration of CT 217mg / L

[0061] pH 6.51

[0062] Cl - Concentration <2mg / L

[0063] (2) Adopt liquid phase reduction method to prepare iron-nickel double metal, the concentration of nickel chloride solution is 0.2mol / L, sodium dithionite is dissolved in the sodium hydroxide solution of 0.1mol / L and is configured to contain sodium dithionite to be 0.3 mol / L alkaline solution, then add iron filings with a particle size of 1 to 3mm into the nickel chloride solution and stir rapidly, the mass ratio of nickel and iron filings contained in it is 1:100, and react at 20°C for 1h , then statically filtered, washed with deionized water until neutral, dehydrated and dried to obtain the iron-nickel bimetallic; soak and wash the natural zeolite with deionized water for 3 times, and then roasted at...

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Abstract

A bimetal catalyst for degradating the CCl4, trichlorothene and tetrachloroethene is sewage within one hour is composed of the modified zeolite as carrier and the bimetal Fe-Ni in the mass ratio of (1-10): 100. Said bimetal Fe-Ni is prepared by using sodium dithionite as reducer to reduce the Ni ions on the surfaces of Fe filings.

Description

technical field [0001] The invention relates to rapid catalytic reduction dechlorination of chlorinated organic pollutants in water, belongs to the field of water treatment and water pollution prevention and control, and in particular relates to a bimetallic catalyst for degrading chlorinated organic pollutants in water, a preparation method and application thereof. Background technique [0002] Chlorinated organic compounds are important chemical raw materials, intermediates and organic solvents, widely used in chemical, pharmaceutical, pesticide, leather and other industries. Such compounds mainly include chlorinated aliphatic hydrocarbons, chlorinated aromatic hydrocarbons and their derivatives. During its use, chlorinated organic compounds enter the environment through volatilization, container leakage, wastewater discharge, pesticide application, and combustion of chlorinated organic products. In addition, the widely used method of using chlorine gas as a disinfectant ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/072C02F1/70C02F1/58
Inventor 徐炎华陈雷陆雪梅杨晓燕
Owner XINYI AGRI CHEM PLANT JIANGSU PROV
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