Sulfurated modified Fe-Cu bimetallic material, preparation method and method for removing chromium-containing wastewater

Abstract

The invention relates to a sulfurated modified Fe-Cu bimetallic material, a preparation method and a method for removing chromium-containing wastewater. In the sulfurated modified Fe-Cu bimetallic material, the molar ratio of sulfur to iron is (0.05-0.06): 1, and the mass ratio of iron to copper is 10: (0.1-4). The preparation method comprises the following steps: in a buffer solution with an acidic environment, performing a reaction on zero-valent iron and soluble sulfate to obtain sulfurated modified zero-valent iron; performing a replacement reaction on the sulfurated modified zero-valent iron and bivalent copper salt to obtain the sulfurated modified Fe-Cu bimetallic material. The heavy metal chromium removing efficiency of the sulfurated modified Fe-Cu bimetallic material is much higher than that of the zero-valent iron, and the reactivity of the sulfurated modified Fe-Cu bimetallic material is also higher than those of a sulfurated modified zero-valent iron material and a Fe-Cu bimetallic material, so that removal of pollutants is effectively accelerated; in addition, the sulfurated modified Fe-Cu bimetallic material has the advantages of small chemical dosage, high reaction speed rate, relatively wide pH adaptability, and the like, and has a wide application prospect in heavy metal-containing wastewater treatment.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a sulfide-modified Fe-Cu bimetallic material, a preparation method and a method for removing chromium-containing wastewater. Background technique [0002] Heavy metal pollution in water is one of the most harmful environmental problems at present. Industrial wastewater discharged from industries such as metal processing, electroplating, and tanning usually contains a large amount of chromium ions. The chromium ions in industrial wastewater are mainly compounds of hexavalent chromium, which often exist as chromate ions, and hexavalent chromium is a carcinogen. , it is easy to leak into groundwater and surface water if not properly stored or handled, and it has a high mobility in soil and water, seriously endangering the environment and human health. The World Health Organization stipulates that the content of hexavalent chromium in drinking water should not exceed 50 μg...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, especially the complex preparation of nanomaterials in the existing chromium-containing wastewater treatment materials, which are difficult to preserve, the applicable range of pH is narrow, and the activity of micron materials is low, the present invention provides a vulcanized modified Fe- Cu bimetallic material, preparation method and method for removing chromium-containing wastewater

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