Bimetallic catalyst for degrading chloro organic pollutant, preparation method and application

A bimetallic catalyst and organic pollutant technology, applied in the field of degrading chlorinated organic pollutants in water, bimetallic catalyst and its preparation, can solve the problems of complex process, small processing capacity, high energy consumption, etc., and achieve continuous and efficient degradation and reduction Moderate activity and the effect of maintaining reactivity

Inactive Publication Date: 2009-10-28
XINYI AGRI CHEM PLANT JIANGSU PROV
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  • 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 chloro organic pollutant, preparation method and application
  • Bimetallic catalyst for degrading chloro organic pollutant, preparation method and application
  • Bimetallic catalyst for degrading chloro organic pollutant, preparation method and application

Examples

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Effect test

Embodiment 1

[0036] Comparison of the effect of treating wastewater containing tetrachloroethylene (PCE) with the method of the present invention and the prior art

[0037] (1) Water quality containing PCE wastewater

[0038] PCE concentration 142mg / L

[0039] pH 5.74

[0040] Cl - Concentration <2mg / L

[0041] (2) Weigh three parts of iron filings of the same quality, the first part without catalyst nickel and modified zeolite is pure iron filings, called filler A; the second part adopts ion exchange method to prepare iron-nickel bimetal, sulfuric acid The concentration of the nickel solution is 0.4mol / L, the mass ratio of nickel and iron filings contained in it is 3:100, the preparation time is 2h, and the prepared iron-nickel bimetal without modified zeolite is composed of filler B; the third part The iron-nickel bimetal is prepared by the liquid-phase reduction method. The concentration of the nickel sulfate solution is 0.4mol / L. Alkaline solution, then add iron filings with a par...

Embodiment 2

[0047] Example 2 Treatment of waste water containing trichloroethylene (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) adopt the liquid phase reduction method to prepare the iron-nickel bimetal, the concentration of the nickel chloride solution is 0.5mol / L, and the sodium hydrosulfite is dissolved in the sodium hydroxide solution of 0.3mol / L and configured to contain sodium hydrosulfite to be 0.75 mol / L mol / L alkaline solution, 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 is carried out at 40 ° C for 1.5 h, then stood for filtration, washed with deionized water until neutral, dehydrated and dried to obtain iron-nickel bimetals; the natural zeolite was soaked and washed with de...

Embodiment 3

[0058] Example 3 Treatment of wastewater containing tetrachloromethane (CT) with the method of the present invention

[0059] (1) Water quality containing CT wastewater

[0060] CT concentration 217mg / L

[0061] pH 6.51

[0062] Cl - Concentration <2mg / L

[0063] (2) The iron-nickel bimetal is prepared by the liquid-phase reduction method, the concentration of the nickel chloride solution is 0.2 mol / L, and the sodium hydrosulfite is dissolved in the sodium hydroxide solution of 0.1 mol / L, and the sodium hydrosulfite is configured to contain 0.3 mol / L of sodium hydrosulfite. mol / L alkaline solution, 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 1:100, and react at 20 ° C for 1 h , then stood for filtration, washed with deionized water until neutral, dehydrated and dried to obtain iron-nickel bimetal; the natural zeolite was soaked and washed with deioni...

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Abstract

The invention relates to a bimetallic catalyst for degrading chlorinated organic pollutants in water, a preparation method and application thereof. The component of this catalyst is iron-nickel bimetal and carrier, and the mass ratio of iron-nickel bimetal and carrier is 100: (1-10), and wherein the mass ratio of iron-nickel in the iron-nickel bimetal is 100: (1-10) 5), the carrier is a modified zeolite. The iron-nickel bimetal is prepared by reducing nickel ions on the surface of iron filings with sodium dithionite as the reducing agent. The iron-nickel bimetal has a good degradation and dechlorination effect on carbon tetrachloride, trichlorethylene and tetrachlorethylene in wastewater, and the removal effect of carbon tetrachloride, trichlorethylene and tetrachlorethylene can reach 95% within one hour. % or more, and the dechlorination efficiency is above 90%.

Description

technical field [0001] The invention relates to the rapid catalytic reduction and dechlorination of chlorinated organic pollutants in water, belongs to the field of water treatment and water pollution prevention, 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, and are 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, waste water discharge, pesticide application and combustion of finished chlorinated organic compounds. In addition, the widely used method of using chlorine gas as a...

Claims

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Application Information

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Patent Type & Authority Patents(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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