Preparation method and application of corn straw loaded nano osmium composite filter column

Abstract

The invention discloses a preparation method of a corn straw loaded nano osmium composite filter column. The method comprises the following steps: selecting air-dried corn straws which are complete in structure and free from cracks, conducting cutting, performing extraction treatment by adopting a sodium hydroxide aqueous solution, repeatedly soaking and washing the extracted raw materials by adopting deionized water until the raw materials are neutral, and performing freeze drying; under the vacuum condition, adopting N-(beta-aminoethyl-gamma-aminopropyl)trimethoxysilane for carrying out silanization reaction on the dried straw, after the reaction is finished, using deionized water for repeatedly soaking and washing the straw till the straw is neutral, and conducting freeze drying to obtain modified corn straw; and mixing and dissolving dry osmium chloride and a hydrochloric acid aqueous solution under the conditions of normal pressure, oxygen and stirring to obtain an osmium chloride solution, putting the modified corn straw into the osmium chloride solution to react, conducting cooling to room temperature after the reaction is ended, conducting washing with deionized water to a neutral state, and conducting freeze-drying to obtain the corn straw loaded nano osmium composite filter column. A solution containing methylene blue and Congo red is treated by adopting the composite filter column, and a result shows that the corn straw loaded nano osmium composite filter column has relatively good capability of removing organic dyes.

Description

technical field [0001] The invention relates to a method of modifying the long chain of N-(β-aminoethyl-γ-aminopropyl)-trimethoxysilane (CG-A112) by using the agricultural solid waste--corn stalks as a template, and growing osmium in situ Nanoparticles, a method for preparing a composite filter column for effectively removing organic dyes, belong to the technical field of biomass-based modified materials. Background technique [0002] Most of the dyes are made of petrochemical products as the main raw materials. They are artificially synthesized aromatic compounds, which have stable chemical properties, low biodegradability, and potential toxicity, carcinogenicity, and distortion. Therefore, dye wastewater has become the current environmental One of the major pollution sources. Over the past few decades, dyes have been produced and used in large quantities and have had a great impact on the environment. With the development of textile printing and dyeing, papermaking and p...

AI Technical Summary

Problems solved by technology

[0004] Osmium, as a platinum group metal with reduction catalytic properties, is currently supported by silica, organic polymers, and activated carbon; because there is no support for the development basis and technology of noble metal Os catalysts in the field of organic polluted water treatment, Moreover, the basic research and industrial utilization of corn stalks are basically still in a blank state.

Therefore, there is no large-scale industrial utilization and in-depth development of functional filter materials that have good shape maintenance in water, water permeability, and are completely biodegradable and environmentally friendly.