Method for preparing magnetic biological carbon adsorbing material and usage thereof

Abstract

The invention discloses a method for preparing magnetic biological carbon adsorbing material and the usage thereof. The method comprises the steps: 1) drying and crushing waste biomass, and sieving by20-100 meshes; 2) putting the sieved biomass into 0.1-0.5mol / L of iron salt solution with the weight percent of the biomass being 1-10% of the total quantity; under stirring, dripping 3-6mol / L of NaOH solution until the pH value of the solution is 9-10; 3) filtering, drying and compacting the solid precipitate, and then limiting oxygen carbonizing for 1-5h at the temperature of 100-700 DEG C, thus obtaining the magnetic biological carbon adsorbing material; 4) putting the magnetic biological carbon adsorbing material into waste water, and simultaneously removing organic pollutant and phosphate radical in the waste water. The method realizes synchronization of preparation of the adsorbing material and the process of magnetization, and is simple in preparation process, rich in the source ofthe biomass material and low in cost; furthermore, the prepared magnetic adsorbent is covered by biological carbon or embedded with magnetic nano Fe3O4 granules, has special structure and stable existence, can effectively remove the organic pollutant and phosphate in the waste water, and is easy for magnetic separation.

Description

technical field [0001] The invention relates to secondary resource utilization of agricultural by-product waste, in particular to a preparation method and application of a magnetic biological carbon adsorption material. Background technique [0002] With the massive discharge of modern industrial and agricultural waste water and domestic sewage, water pollution is becoming more and more serious. Among them, eutrophication of water bodies and pollution of refractory organic substances (such as polycyclic aromatic hydrocarbons, polychlorinated biphenyls, and aromatic nitro compounds) have become serious problems. It has become the focus of my country's water pollution prevention and control. [0003] Biochar is a carbon-containing product produced by the incomplete combustion of biomass (such as straw, fruit peels, wood chips, and corn cobs). Due to its large-capacity distribution and strong surface adsorption for organic pollutants, biochar can be used as a cheap adsorbent fo...

AI Technical Summary

Problems solved by technology

However, currently prepared magnetic carbon materials such as MFe 2 o 4 -Activated carbon (M=Fe, Cu), Fe-multi-walled carbon nanotubes, γ-Fe 2 o 3 -Multi-walled carbon nanotubes, etc. are made by depositing the above-mentioned magnetic medium on the surface of the adsorbent through chemical precipitation. The magnetic medium is easy to detach and the structure is not stable enough

Moreover, the preparation process is to carry out subsequent magnetization treatment on commercialized or finished adsorbents (such as activated carbon, multi-walled carbon nanotubes), which increases the cost.

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