Preparation of composite carbon-based nano-zero-valent iron microelectrolytic material and method for treating antimony-containing wastewater

Abstract

The invention provides a preparation method for a composite carbon based nano zero-valent iron micro electrolysis material and a method for treating antimony-contained wastewater. The composite carbonbased nano zero-valent iron micro electrolysis material provided by the invention is a micro electrolysis material which takes an element carbon as a carrier, is loaded with nano zero-valent iron, and is doped with an element copper as auxiliaries, wherein the metal element is covered by the element carbon. The material has relatively high redox potential difference of the micro electrolysis material, an over-sized specific surface area of a mesoporous material, excellent redox activity and excellent performances of the nano material. The composite carbon based nano zero-valent iron micro electrolysis material provided by the invention is low in preparation cost, is high in efficiency of treating antimony-contained wastewater, is simple in operation method and is very suitable for adsorbing pollutants in an environment water sample.

Description

technical field [0001] The invention belongs to the field of environmental protection, and relates to a preparation method and application of a novel micro-electrolytic material, in particular to the preparation of a composite carbon-based nanometer zero-valent iron micro-electrolytic material and its application in treating antimony-containing wastewater. Background technique [0002] Antimony is an accumulatively toxic and carcinogenic pollutant to humans, which usually exists in environmental, biological and geochemical samples in the form of Sb(Ⅲ) and Sb(Ⅴ). my country is a traditional antimony producing country, and also the country with the richest antimony ore resources in the world, with a total reserve of 2.78×10 6 t, accounting for 66.2% of the world's total antimony reserves. The antimony-containing wastewater discharged from antimony industrial mining, mineral processing, smelting and other processes is the main source of antimony pollutants. As the country pay...

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Problems solved by technology

Among them, the adsorption method can remove harmful substances in water without increasing the salinity in water. However, the adsorbent has certain selectivity to target pollutants, and the existence form of antimony in water is relatively complicated. Antimony in various forms requires multi-stage adsorption and coordination to meet the treatment requirements; the precipitation method and neutralization method are relatively simple, but a large amount of neutralizing agent needs to be added, and a large amount of antimony-containing sludge is generated during the treatment process, which increases the subsequent treatment cost; redox The antimony method can convert complex forms of antimony into a single form for removal, but it needs to add a large amount of oxidizing agent or reducing agent, the treatment cost is high, and it is not suitable for industrialization; the ion exchange method uses XAD-8 ion exchange resin to remove Sb(Ⅲ ) and Sb(Ⅴ) have good adsorption, but the reaction conditions are harsh, and the exchange resin per unit volume has a limited treatment capacity for antimony-containing wastewater, which cannot meet industrial applications.

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