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A kind of synthetic method and application of Schwittmannite

A concentration, H2O2 technology, applied in the field of water treatment, can solve the problems of low yield of Schwittmannite and poor tetracycline removal effect.

Active Publication Date: 2020-05-08
NANJING AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of the prior art, the problem of the low yield of Schwittmannite synthesized by chemical methods, one of the purposes of the present invention is to provide a synthetic method of Schwittmannite with high yield; The problem of poor removal effect, the second purpose of the present invention is to provide a method for removing tetracycline in water

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  • A kind of synthetic method and application of Schwittmannite
  • A kind of synthetic method and application of Schwittmannite
  • A kind of synthetic method and application of Schwittmannite

Examples

Experimental program
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Effect test

Embodiment 1

[0041] The specific steps of utilizing chemical method to prepare Schwittmannite catalyst in the present embodiment are as follows:

[0042] Step 1: add the aqueous solution of pH5 (utilizing sulfuric acid to regulate) in conical flask, then add the FeSO of 43.2g 4 ·7H 2 O and stir evenly, then add 7 mL of H with a mass fraction of 30% in one go 2 o 2 (not adding dropwise, one-time direct addition is conducive to obtaining Schwemanite with large specific surface area and smooth surface), and finally keeping the total volume of the reaction system is 600mL; at this time, the H in the reaction system 2 o 2 The added concentration is 4.0g / L, FeSO 4 ·7H 2 The added concentration of O is related to that of H 2 o 2 The concentration ratio of is 10.8;

[0043] Subsequently, the reaction system was placed in a reciprocating shaker at 180r / min, and reacted for 24 hours at a temperature of 28°C, and precipitates formed in the reaction system;

[0044] Step 2: The precipitate ge...

Embodiment 2

[0055] This embodiment is basically the same as Embodiment 1, and its difference only lies in:

[0056] In the first step of preparing Schwittmannite catalyst by chemical method: place the total reaction system in a reciprocating shaker at 180r / min, and react at 30°C for 20 hours, and there is precipitation in the reaction system;

[0057] In step 2: the precipitate generated in the reaction system is collected by filtration with a filter membrane with a pore size of 0.22 μm, washed 3 times with a sulfuric acid solution with a pH of 2.0 to 2.5, and then washed 3 times with deionized water, and vacuum freeze-dried The solid catalyst Schwittmannite was obtained.

[0058] Utilize the Schwemanite prepared in this example to catalyze the degradation of the target water body whose tetracycline concentration is 1, wherein:

[0059] In the second step: the amount of Schwittmannite added to the target water body is 0.8, moved to the photocatalytic reactor, under dark conditions, and w...

Embodiment 3

[0063] This embodiment is basically the same as Embodiment 1, and its difference only lies in:

[0064] In the first step of preparing the Schwittmannite catalyst by chemical method: place the total reaction system in a reciprocating shaker at 180r / min, and react at 35°C for 25 hours, and there is precipitation in the reaction system;

[0065] In step 2: the precipitate generated in the reaction system is collected by filtration with a filter membrane with a pore size of 0.32 μm, washed 3 times with a sulfuric acid solution with a pH of 2.0 to 2.5, and then washed 3 times with deionized water, and vacuum freeze-dried The solid catalyst Schwittmannite was obtained.

[0066] Utilize the Schwemanite prepared in this example to catalyze the degradation of the target water body whose tetracycline concentration is 1, wherein:

[0067] In the second step: the addition of Schwittmannite in the target water body is 1.5g, move it to the photocatalytic reactor, under dark conditions, wa...

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Abstract

The invention discloses a synthesis method and application of Schwieterman stone, and belongs to the technical field of water treatment. The synthesis method of the Schwieterman stone comprises the following steps: (1) adding FeSO4.7H2O to an aqueous solution with a pH value of 2-7, performing even stirring, then adding H2O2, and then performing vibration treatment so as to form a precipitate; and(2) performing filtration and collection on the precipitate, performing washing with an acidic solution, and then conducting washing with deionized water, and performing vacuum freeze drying so as toobtain the solid catalyst Schwieterman stone. The yield of the Schwieterman stone prepared by using the method is high. When the prepared Schwieterman stone is used as a heterogeneous Fenton reactioniron-based material for Fenton-like oxidation reaction treatment on tetracycline, tetracycline in water can be removed effectively and efficiently, no secondary pollution to the environment is caused, the operation is simple, and the cost is low; and therefore a good application prospect is achieved in degradation of tetracycline pollutants in water.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and more specifically relates to a synthesis method and application of Schwittmannite. Background technique [0002] Tetracycline antibiotics are a typical pollutant of pharmaceuticals and personal care products (PPCPs), which are widely used in human disease treatment and animal husbandry production, resulting in a large number of residues in the water environment. Tetracycline (TC) remaining in the water environment will seriously damage the ecological balance of the water body and bring many adverse effects, such as causing bacteria to mutate and produce a large number of drug-resistant bacteria, endangering the life activities of aquatic animals and human health. Therefore, it is of great significance to study the treatment technology of TC pollution in water bodies. [0003] At present, the commonly used treatment methods for tetracycline antibiotics include physical adsorption, ana...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/053B01J20/06C02F1/28C02F1/72B01J20/30C02F101/38C02F101/34
CPCB01J20/0229B01J20/0281B01J20/06B01J27/053C02F1/281C02F1/722C02F1/725C02F2101/34C02F2101/38
Inventor 周立祥李婷
Owner NANJING AGRICULTURAL UNIVERSITY
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