A kind of preparation method of agricultural biomass carbon-based magnetic adsorption material

Abstract

The invention discloses a preparation method for an agriculture biomass carbon-based magnetic adsorption material. According to the method, agriculture biomass originated from plant organisms is used as a raw material and a loading process of ultrasonic blending of trivalent iron ions with biomass, alkali precipitation and a low temperature hydro-thermal carbonization magnetization process are adopted so as to prepare the biomass carbon adsorption material with magnetism. The method realizes simultaneous preparation and magnetization of the carbon adsorption material and has the advantages of wide sources, low price and easy availability of the raw material, good versatility and controllability and easy processes. The material prepared by using the method has stable magnetism and strong adsorptivity, is easy to separate, can be used for water treatment decoloring and removal of organic pollutants like dyes and shows wide application prospects in the field of environmental management.

Description

technical field [0001] The invention belongs to the technical field of sustainable regeneration and advanced material preparation. It involves related technologies in multiple interdisciplinary fields such as biomass resource science, material science, environmental science and environmental protection, and mainly involves a method that can use agricultural biomass resources on a large scale to prepare magnetic biological carbon-based adsorption materials. technical background [0002] With the rapid development of science and technology and economy, the massive discharge of agricultural and industrial production wastewater has made the problem of water environmental pollution increasingly prominent. Especially in printing and dyeing wastewater, most of the dyes contained are artificially synthesized chemical dyes with complex aromatic ring structures, stable properties, difficult to degrade, and potential toxicity. Direct discharge will cause serious pollution to the enviro...

AI Technical Summary

Problems solved by technology

Although these studies have achieved certain results, there are still the following problems: (1) The controllability of the preparation process is poor

In particular, the filling process of directly mixing activated carbon or biomass with magnetic powder can easily cause the magnetic medium to fall off, the material structure is unstable, and the adsorption capacity of activated carbon is reduced.

(2) The magnetic precursor is mostly a mixture of ferrous iron and ferric iron, a mixture of iron salt and inorganic salt, or a mixture of iron salt, inorganic salt and ethanol, and the preparation process is cumbersome

(3) The carbonization or magnetization process adopts the method of high-temperature pyrolysis in an oxygen-limited or nitrogen atmosphere. On the one hand, the reaction conditions are harsh, which increases energy consumption and cost. On the other hand, the reactants need to be filtered, dried, and compacted before high temperature Cracking treatment, the process is cumbersome and the cycle is long

However, there are no reports on the preparation of magnetic agricultural waste carbon-based adsorption materials by hydrothermal synthesis.

[0004] my country is the country with the largest output of agricultural waste in the world. The annual output of crop straw alone is as high as 750 million tons and there are various types. Environmental pollution, especially the environmental problems caused by straw burning, has become particularly prominent in recent years

Images