Oyster shell powder reinforced biochar for removing microplastics in mariculture water body as well as preparation method and application of oyster shell powder reinforced biochar
A technology for oyster shell powder and mariculture, which is applied in seawater treatment, water/sewage treatment, chemical instruments and methods, etc., can solve problems such as natural environment and biological hazards, and achieve high pore size, high specific surface area, and better purification effect. good effect
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[0024] Each step of the biochar preparation method of the present invention will be explained in more detail below.
[0025] It should be understood that regardless of the manner in which individual product quantities are presented herein, they should be construed as being recited precisely to two decimal places. Thus, 50% by weight means 50.00% by weight, and likewise, 0.3% by weight means 0.30% by weight.
[0026] For the purposes of this application, the term "biochar" shall be given its broadest possible meaning and shall include any solid obtained from the pyrolysis, hydrothermal carbonization, gasification or any other thermal and / or chemical conversion of biomass A material wherein the biochar comprises at least 55% carbon by weight. Pyrolysis is generally defined as the thermochemical decomposition of organic materials at elevated temperatures in the absence or reduced oxygen content.
[0027] As used herein, unless otherwise stated, room temperature is 25°C. Standa...
Embodiment 1
[0061] Step 1: Wash the waxberry branches with deionized water, dry them at 105°C to constant weight, and crush them to 10 mesh to obtain crushed raw materials;
[0062] Step 2: Place the pulverized raw material obtained in step 1 in a reaction vessel filled with an aqueous iron salt solution, and introduce micro-nano bubbles into the reaction vessel while controlling the temperature in the reaction vessel to be 45°C for 0.5h, and then control the reaction pressure to 1.1MPa and heat up to 60°C for 12h;
[0063] Wherein, the weight ratio of the biomass material and the iron-containing soluble salt is 8:0.5, and the iron-containing soluble salt includes ferric nitrate, ferric sulfate, ferric chloride, and the weight ratio of the three is 1: 2:1;
[0064] Step 3: quickly transfer the product obtained from the final reaction in step 2 to liquid nitrogen for 1 hour of freezing, and then perform freeze-drying treatment, wherein the freeze-drying treatment is carried out at -60°C a...
Embodiment 2
[0071] Step 1: Wash the waxberry branches with deionized water, dry them at 105°C to constant weight, and crush them to 40 mesh to obtain crushed raw materials;
[0072] Step 2: Put the pulverized raw material obtained in Step 1 in a reaction vessel filled with an aqueous iron salt solution, and introduce micro-nano bubbles into the reaction vessel while controlling the temperature in the reaction vessel to 50°C for 1 hour, and then control the reaction pressure to 1.3 MPa and heated to 60 ° C for 18 hours;
[0073] Wherein, the weight ratio of the biomass material and the iron-containing soluble salt is 6:0.8, and the iron-containing soluble salt includes ferric nitrate, ferric sulfate, and ferric chloride, and the weight ratio of the three is 1.5: 2:1;
[0074] Step 3: quickly transfer the product obtained from the final reaction in step 2 to liquid nitrogen for 1.5 hours of freezing, and then perform freeze-drying treatment, wherein the freeze-drying treatment is carried o...
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Abstract
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