Method and application of environment-friendly synthesis nanometer zero-valent iron-nickel bimetal materials

Abstract

The invention relates to a method of environment-friendly synthesis nanometer zero-valent iron-nickel bimetal materials. The method includes the following steps of weighing 20 g-60 g of green tea to be added into 1 liter of distilled water, heating the mixture for 40 min-60 min at the temperature of 60 DEG C-80 DEG C, cooling the mixture to the room temperature, and obtaining a green tea extracting solution by filtering the mixture; dissolving iron salt and nickel salt in the distilled water to prepare an iron-nickel mixed solution; adding the iron-nickel mixed solution into a three-opening flask, heating the solution in water bath at the temperature of 25 DEG C to 70 DEG C, stirring the solution for 10 min-60 min at the rate of 350 r / min, dropwise adding the green tea extracting solution in the stirring process, continuing to stir for 20 min, and obtaining environment-friendly synthesis nanometer zero-valent iron-nickel suspension liquid; and separating the suspension liquid through a suction filtration method, and drying obtained precipitates in a vacuum drying box for 12 h-48 h at the temperature of 40 DEG C-70 DEG C so that the environment-friendly synthesis nanometer zero-valent iron-nickel bimetal materials can be obtained. The preparation process is simple, the reaction condition is moderate, the cost is greatly reduced, and the method has the huge application and popularization potential in the field of chromium-contaminated soil and groundwater remediation.

Description

technical field [0001] The invention relates to the technical field of the preparation of metal nanoparticles and the degradation of hexavalent chromium in water and soil, in particular to a method and application of green synthesis of nanometer zero-valent iron-nickel bimetallic materials. Background technique [0002] With the development of my country's industrialization, heavy metal chromium and its compounds are widely used in various fields of industrial production, and as industrial waste enters the environment, it has become a major hazard in water and soil in the environment. There are two forms of Cr(III) and Cr(VI) that exist stably in the environment. Among them, Cr(Ⅵ) is the most toxic, easily absorbed by organisms, and has strong teratogenic, carcinogenic and mutagenic effects, which is 100 times more toxic than Cr(Ⅲ). At present, the removal methods of Cr(Ⅵ) mainly include chemical reduction method, membrane separation method, ion exchange method, electrochem...

AI Technical Summary

Problems solved by technology

At present, there have been related studies on the synthesis of nano-zero-valent gold, silver, platinum and iron using green tea, but there has been no report on the preparation of nano-zero-valent iron-nickel bimetallic materials using green tea extract. Based on this, the present invention proposes a green synthetic nano-zero Scheme of Valence Iron-Nickel Bimetallic Materials

Images