Integrated device for preparing nano zero-valent iron in laboratory and preparation method

Abstract

The invention discloses an integrated device for preparing nano zero-valent iron in a laboratory and a preparation method. The integrated device comprises a reaction and preparation device, a connecting device, a separating and cleaning device, a heating and drying device and a fixing and supporting device, wherein the separating and cleaning device is fixed on the bottom of the fixing and supporting device; the reaction and preparation device is connected to the upper portion of the separating and cleaning device through the connecting device, and is used for carrying out preparation, separating and cleaning processes of samples; the connecting device is connected with the fixing and supporting device through a turnover mechanism, and is used for overturning the separating and cleaning device at an angle of 180 degrees; the heating and drying device is additionally mounted on the outside of the separating and cleaning device which overturns at an angle of 180 degrees, and is used forcarrying heating and drying processes; and the separating and cleaning device is connected with a negative-pressure collecting device which is used for a material transferring process. In a word, reaction, cleaning, drying and collection are integrated, in the whole process, exposed transfer does not exist, and material oxidation risks are reduced.

Description

technical field [0001] The invention belongs to the technical field of preparation of water treatment materials, and in particular relates to an integrated device and preparation method for preparing nanometer zero-valent iron in a laboratory. Background technique [0002] In recent years, nano-restoration technology has made great progress in the field of environmental science. The size of iron particles in nano parts is 1-100nm. As the particle diameter decreases, the surface area and surface energy of nanoparticles increase rapidly, and they are more easily oxidized. Studies have shown that zero-valent iron materials, especially nano-scale zero-valent iron materials, have become a very active research field in environmental pollution remediation technology due to their high reactivity and remediation of various environmental pollutants. Nano-scale zero-valent iron can effectively degrade many organic substances such as halogenated hydrocarbons, halogenated olefins, halog...

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Problems solved by technology

[0003] Through the research on the preparation, separation and cleaning process of nano-zero-valent iron and other materials prepared in the laboratory, it is found that due to the special properties of the material (easy to oxidize), the entire preparation, filtration, separation and drying process must be in an oxygen-free environment, so that The entire preparation, separation, and drying process is inconvenient to operate. The traditional method is to transfer the preparation solution to an anaerobic glove box for operation. The separation and cleaning methods used are filter paper-funnel and centrifugation. The "filter paper-funnel" process is inconvenient to operate. The single separation amount is limited, the separation takes a long time, and the loss is large. On the one hand, the "centrifugal" method is easy to oxidize and has a large loss. On the other hand, it is only suitable for heavy materials. Therefore, we have invented a whole set of experimental methods and equipment to greatly Improve the work efficiency of nano-zero-valent iron and loading materials prepared in the laboratory

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