Preparation method and application of artificial humus/iron mineral co-precipitated composite material

A composite material and iron mineral technology, applied in the field of iron mineral composite material preparation, can solve the problems of unfavorable popularization and application, high preparation cost, single synthesis method, etc., and achieve the goal of reducing dispersion, improving recovery efficiency and increasing effect Effect

Active Publication Date: 2022-12-02
NORTHEAST AGRICULTURAL UNIVERSITY
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Problems solved by technology

[0004] The present invention aims to solve the problems of solidified composition, single synthesis method, expensive preparation cost and unfavorable popularization and application of existing iron mineral composite materials, and provides a preparation method of artificial humus / iron mineral co-precipitated composite material

Method used

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  • Preparation method and application of artificial humus/iron mineral co-precipitated composite material
  • Preparation method and application of artificial humus/iron mineral co-precipitated composite material
  • Preparation method and application of artificial humus/iron mineral co-precipitated composite material

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specific Embodiment approach 1

[0041] Specific embodiment one: this embodiment is a kind of preparation method of artificial humus / iron mineral co-precipitation state composite material is completed according to the following steps:

[0042] 1. First, wash, dry and grind the biomass waste, then add the biomass powder into the strong alkaline aqueous solution, and transfer it to a high-pressure reactor for hydrothermal humification reaction to obtain the reaction product I; The reaction product I is filtered, and the liquid is collected to obtain a hydrothermal humification liquid product;

[0043] 2. Dissolving the solid iron metal salt in water first, and then strengthening the alkaline solution drop by drop until the pH value of the solution reaches 12-14 to obtain the iron mineral precursor;

[0044] 3. Add the hydrothermal humification liquid product dropwise to the iron mineral precursor, stir, and then age in a water bath at a constant temperature to obtain the reaction product II; centrifuge the reac...

specific Embodiment approach 2

[0048] Embodiment 2: This embodiment differs from Embodiment 1 in that the biomass waste described in step 1 is leaves, rice straw, corn straw or soybean straw. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0049] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the strong alkaline aqueous solution described in step one is that strong base is dissolved in deionized water, wherein the quality of strong base is the same as that of deionized water The volume ratio is (1g~6g):(100mL~220mL); the strong base is NaOH or KOH. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

A preparation method and application of artificial humus / iron mineral co-precipitated composite material, which relates to a preparation method of iron mineral composite material. The invention is to solve the problems of existing iron mineral composite materials with solid composition, single synthesis method, expensive preparation cost and being unfavorable for popularization and application. 1. Preparation of hydrothermal humification liquid product; 2. Preparation of iron mineral precursor; 3. Hydrothermal reaction to obtain artificial humus / iron mineral co-precipitated composite material. The maximum adsorption capacity of the artificial humus / iron mineral coprecipitated composite material prepared by the present invention for removing P is as high as 19.394 mg / g. An artificial humus / iron mineral co-precipitated composite material is used for the removal of phosphate in eutrophic water bodies. The invention can obtain an artificial humus / iron mineral co-precipitated composite material.

Description

Technical field [0001] The invention relates to a preparation method of iron mineral composite materials. Background technique [0002] As a valuable mineral resource, iron minerals have the characteristics of large specific surface area, high reactivity, variable charge surface area, and ubiquity in natural water and soil. They are usually combined with natural organic matter to form inorganic-organic complexes, directly or Indirectly affects the adsorption and immobilization performance of oxygen anions. Humic substance (HS) is a typical representative of natural organic matter and is considered a "sleeping giant". It takes thousands of years to form under natural conditions, including biotic and abiotic reactions. The use of hydrothermal humification technology can greatly Accelerate the reaction rate and prepare artificial humus with similar physical and chemical properties. At the same time, phosphorus, as the most common oxygen anion, is not only a limiting factor fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/10
CPCB01J20/0229B01J20/24C02F1/288B01J2220/4875B01J2220/4812C02F2101/105
Inventor 杨帆兰依博程魁
Owner NORTHEAST AGRICULTURAL UNIVERSITY
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