A method for reducing and degrading organic pollutants by Al-Ni alloy in alkaline wastewater

Abstract

The invention discloses a method for using an aluminum-nickel alloy to reduce and degrade an organic pollutant in alkali wastewater. The method comprises the following steps: putting aluminum-nickel alloy particles in to-be-processed halogenated organic alkali wastewater, wherein for the aluminum-nickel alloy, the content of nickel based on mass is 40-50%, the other part is aluminum, and the putting amount of the aluminum-nickel alloy is controlled within the range of 1-20 g / L; putting a complexing agent which can be complex with aluminum in the to-be-processed halogenated organic alkali wastewater, and controlling the putting amount within the range of 0.5-40 mmol / L. The method is to utilize the stable complexation function that the complexing agent can make the aluminum-nickel alloy dissolve out Al<3+> from the alkali solution, so as to obstruct the aluminum matrix to corrode and damage the surface at ordinary state to stop fast spontaneous growth of the oxidation film of aluminum, enable the aluminum base to lose protection of the inert oxidation film, promote the metal aluminum monomer to directly expose in a water body to separate out hydrogen by electrons, and then combine the mutually soluble alloy nickel with hydrogen to catalyze the pollutant. Therefore, the method can obviously increase the capability of the aluminum-nickel alloy to catalyze and hydrogenate, reduce and degrade the organic pollutant.

Description

technical field [0001] The invention belongs to the hydrogenation reduction technology of water-phase organic matter and the environmental bimetallic catalytic degradation technology, specifically a method for reducing and degrading organic pollutants in alkaline waste water by using aluminum-nickel alloys. Background technique [0002] Chlorinated organic compounds and nitrobenzene are important chemical raw materials and organic reagents, widely used in chemical, pesticide, dye, military and other industries. With the mass production and use of these organic substances, the pollution caused by their proliferation has posed a serious threat to human health and environmental ecology. For example: chloroacetic acid, which is a by-product of drinking water disinfection and an important precursor of pesticide synthesis, common organochlorine pesticides (DDT, chlordane, lindane), chlorobenzene, and chlorophenol compounds all have significant toxicity and "three effects" ( Carci...

AI Technical Summary

Problems solved by technology

However, the cost of using noble metal catalysts is high, and the use of H 2 It will also increase the difficulty and danger of operation; and the bimetallic materials prepared by hydrometallurgy, the catalyst metal is loaded on the matrix metal by chemical deposition, although the material has high activity when it is first prepared, it will be used for many times due to the loss of the matrix metal. Corrosion will cause the catalytic metal to fall off, resulting in a rapid decline in catalytic activity

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