阅读说明：本技术 一种生物质水处理环境功能材料的制备方法 (Preparation method of biomass water treatment environment functional material ) 是由 黎想 黎鹏 贾炎 秦杨 于 2020-06-22 设计创作，主要内容包括：本发明公开了一种生物质水处理环境功能材料的制备方法,属于水处理材料技术领域。该制备方法包括将生物质材料粉碎,浸渍在铁盐溶液和锆盐溶液混合而成的混合溶液中,并进行超声处理,浸渍充分后,过滤,得预处理生物质材料；向预处理生物质材料中加入NaOH溶液,NaOH溶液的加入量为预处理生物质材料体积的3-4倍,每隔10-20min震荡一次,浸泡60-120min后,离心,清洗,烘干,并将含水率控制为8-15％；将步骤S2烘干后材料压缩为密度为0.8-1.5g/cm<Sup>3</Sup>的球体,置于高温炭化炉中,并通以氩气保护,以5-10℃/min的速度升温至450-800℃,保温碳化2-3h,然后自然降至室温,得球状生物质基磁性活性炭。本发明的制备方法工艺简单,能耗低,且制备的生物炭基磁性活化剂具有良好的可回收性和稳定性。(The invention discloses a preparation method of a biomass water treatment environment functional material, and belongs to the technical field of water treatment materials. The preparation method comprises the steps of crushing the biomass material, soaking the biomass material in a mixed solution formed by mixing an iron salt solution and a zirconium salt solution, carrying out ultrasonic treatment, and filtering after full soaking to obtain a pretreated biomass material; pretreatment of biomass materialAdding NaOH solution into the material, wherein the addition amount of the NaOH solution is 3-4 times of the volume of the pretreated biomass material, shaking once every 10-20min, soaking for 60-120min, centrifuging, cleaning, drying, and controlling the water content to be 8-15%; compressing the material dried in the step S2 to a density of 0.8-1.5g/cm 3 The sphere is placed in a high-temperature carbonization furnace, argon is introduced for protection, the temperature is raised to 450-800 ℃ at the speed of 5-10 ℃/min, the temperature is kept for carbonization for 2-3h, and then the temperature is naturally reduced to room temperature, so that the spherical biomass-based magnetic activated carbon is obtained. The preparation method provided by the invention is simple in process and low in energy consumption, and the prepared biochar-based magnetic activator has good recoverability and stability.)

1. A preparation method of a biomass water treatment environment functional material is characterized by comprising the following steps:

s1, crushing the biomass material, soaking the crushed biomass material in a mixed solution formed by mixing an iron salt solution and a zirconium salt solution, performing ultrasonic treatment, and filtering after full soaking to obtain a pretreated biomass material;

s2, adding NaOH solution into the pretreated biomass material, wherein the addition amount of the NaOH solution is 3-4 times of the volume of the pretreated biomass material, shaking the pretreated biomass material once every 10-20min, soaking the pretreated biomass material for 60-120min, centrifuging, cleaning and drying the pretreated biomass material, and controlling the water content to be 8-15%;

s3, compressing the material dried in the step S2 to a density of 0.8-1.5g/cm³The sphere is placed in a high-temperature carbonization furnace, argon is introduced for protection, the temperature is raised to 450-800 ℃ at the speed of 5-10 ℃/min, the temperature is kept for carbonization for 2-3h, and then the temperature is naturally reduced to room temperature, so that the spherical biomass-based magnetic activated carbon is obtained.

2. The method for preparing the functional material in the environment for processing the biomass water according to claim 1, wherein the ferric salt solution is 0.5mol/L ferric chloride, the zirconium salt solution is 0.5mol/L zirconium nitrate, and the mixed solution is formed by mixing 0.5mol/L ferric chloride and 0.5mol/L zirconium nitrate according to a volume ratio of 2: 0.5.

3. The method for preparing the biomass water treatment environment functional material according to claim 1, wherein the biomass material is coconut shell or shaddock peel.

4. The method for preparing the functional material for the biomass water treatment environment as claimed in claim 1, wherein the compression is hot pressing, and the temperature for compression molding is 160-300 ℃.

5. The method for preparing the functional material of the biomass water treatment environment according to claim 1, wherein the power of the ultrasonic treatment is 0.9kW/m³The frequency was 150 kHz.

6. The method for preparing the functional material of biomass water treatment environment as claimed in claim 1, wherein the drying temperature in step S2 is 100-105 ℃.

7. The method for preparing the functional material for the biomass water treatment environment according to claim 1, wherein the particle size of the spherical biomass-based magnetic activated carbon is 0.5-1.5 cm.

Technical Field

The invention relates to the technical field of water treatment materials, in particular to a preparation method of a biomass water treatment environment functional material.

Background

Biomass refers to various organisms produced by photosynthesis using the atmosphere, water, land, and the like, and all living organic substances that can grow are generally called biomass. It includes plants, animals and microorganisms. The biomass belongs to renewable resources, is huge in quantity and various in variety, is commonly woody and herbaceous plants, such as agricultural processing residues, forestry processing residues, aquatic plants, energy plants and the like, contains abundant carbon elements, and is a cheap raw material for preparing various carbon materials.

The biomass is pyrolyzed at high temperature under the anoxic condition to form biomass carbon, so that the biomass carbon has good adsorption and catalysis performances, and can be obtained by physical or chemical activation during carbonization or after carbonization, so that a more developed pore structure and a more specific surface area can be obtained, the adsorption capacity is stronger, and the biomass carbon has wide application in the field of water pollutant adsorption.

Numerous studies have shown that although biomass activated carbon has excellent performance in water treatment as an adsorbent, certain recovery difficulty exists, and the current recovery method of biomass activated carbon is mainly a filtration method, but the method is easy to block meshes to cause carbon loss. In order to solve the problem of difficult recovery, the magnetic functionalized modification is carried out on the activated carbon in the prior art, the magnetic activated carbon is easily separated from the wastewater containing suspended solid through an external magnetic field, and the method has the advantages of time saving, low cost, high efficiency and the like.

At present, the magnetic modification treatment of biomass activated carbon is mainly carried out by compounding magnetic particles and magnetic fluid with activated carbon, but the magnetic particles are unevenly distributed in the activated carbon, and in addition, the problem of low mechanical strength of the biomass activated carbon is solved.

Disclosure of Invention

The invention aims to overcome the problems in the prior art and provides a preparation method of a biomass water treatment environment functional material.

The invention provides a preparation method of a biomass water treatment environment functional material, which comprises the following steps:

s1, crushing the biomass material, soaking the crushed biomass material in a mixed solution formed by mixing an iron salt solution and a zirconium salt solution, performing ultrasonic treatment, and filtering after full soaking to obtain a pretreated biomass material;

s2, adding NaOH solution into the pretreated biomass material, wherein the addition amount of the NaOH solution is 3-4 times of the volume of the pretreated biomass material, shaking the pretreated biomass material once every 10-20min, soaking the pretreated biomass material for 60-120min, centrifuging, cleaning and drying the pretreated biomass material, and controlling the water content to be 8-15%;

s3, compressing the material dried in the step S2 to a density of 0.8-1.5g/cm³The sphere is placed in a high-temperature carbonization furnace, argon is introduced for protection, the temperature is raised to 450-800 ℃ at the speed of 5-10 ℃/min, the temperature is kept for carbonization for 2-3h, and then the temperature is naturally reduced to room temperature, so that the spherical biomass-based magnetic activated carbon is obtained.

Preferably, the ferric salt solution is 0.5mol/L ferric chloride, the zirconium salt solution is 0.5mol/L zirconium nitrate, and the mixed solution is formed by mixing 0.5mol/L ferric chloride and 0.5mol/L zirconium nitrate according to the volume ratio of 2: 0.5.

Preferably, the biomass material is coconut husk or grapefruit peel.

Preferably, the compression is hot pressing, and the temperature of compression molding is 160-300 ℃.

Preferably, the power of the ultrasonic treatment is 0.9kW/m³The frequency was 150 kHz.

Preferably, the drying temperature in step S2 is 100-105 ℃.

Preferably, the particle size of the spherical biomass-based magnetic activated carbon is 0.5-1.5 cm.

Compared with the prior art, the invention has the beneficial effects that: according to the preparation method, the iron and the zirconium are loaded on the biomass material by adopting a dipping method, and the ultrasonic treatment is matched in the dipping process, so that the iron and the zirconium are more uniformly distributed in the biomass material, and the whole magnetic property and mechanical property of the functional material are improved.

The invention adopts the process of activation and carbonization, and can obtain products with large specific surface area and developed pore structures.

The preparation method provided by the invention is simple to operate and low in cost, and the obtained biological carbon-based magnetic activator has good recoverability and stability, and meanwhile, due to high strength and small carbon loss, the service life of the biological activated carbon is greatly prolonged.

Detailed Description

The following detailed description of specific embodiments of the invention is provided, but it should be understood that the scope of the invention is not limited to the specific embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.