Preparation method and application of nano-osmium composite filter column attached to corn stalk

Abstract

The invention discloses a preparation method of a nano-osmium composite filter column attached to corn stalks. The method is to select air-dried corn stalks with complete structure and no cracks, cut them, and use sodium hydroxide aqueous solution for extraction treatment. The ionized water was repeatedly soaked and washed until neutral, and freeze-dried; under vacuum conditions, N-(β-aminoethyl-γ-aminopropyl) trimethoxysilane was used to carry out a silanization reaction on the dried straw, and after the reaction was completed, use Deionized water is repeatedly soaked and washed until neutral, and freeze-dried to obtain modified corn stalks; under normal pressure, aerobic, and stirring conditions, dry osmium chloride and hydrochloric acid aqueous solution are mixed and dissolved to obtain an osmium chloride solution. The denatured corn stalks were put into the osmium chloride solution to react, the reaction was completed, cooled to room temperature, washed with deionized water until neutral, and freeze-dried to obtain the corn stalk-loaded nano-osmium composite filter column; The solution of methylene blue and Congo red is treated, and the results show that the nano-osmium composite filter column attached to the corn stover of the present invention has a good ability to remove organic dyes.

Description

technical field [0001] The invention relates to a method for modifying a long chain of N-(β-aminoethyl-γ-aminopropyl)-trimethoxysilane (CG-A112) by using agricultural solid waste-corn stalk 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 dyestuffs are synthetic aromatic compounds with petrochemical products as the main raw materials, which have stable chemical properties, low biodegradability, potential toxicity, carcinogenic and distorting effects. Therefore, dye wastewater has become the current environment. One of the major pollution sources. The mass manufacture and use of dyes over the past few decades has had a significant impact on the environment. With the development of textile printing and dyeing, papermaking and printing industries, and people's increasing dem...

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.