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Preparation method of modified natural wood material and application of modified natural wood material in sewage treatment

A kind of wood material and natural technology, applied in the field of preparation of modified natural wood materials, can solve the problems of low energy conversion utilization rate, environmental toxicity accumulation, secondary environmental pollution, etc. It is easy to achieve the preparation conditions, avoid secondary pollution, The effect of ensuring ecological security

Pending Publication Date: 2022-07-29
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As one of the most abundant renewable energy sources in nature, solar energy itself contains a certain amount of ultraviolet light bands, which can be used for disinfection and sterilization, and the energy contained in other bands of the solar spectrum can also be used for photothermal sterilization. When acting on the overall sewage disinfection, due to a large amount of thermal diffusion and loss, the energy conversion utilization rate is low; A new solar energy utilization mode for clean fresh water; at the same time, through the modification of modified materials, it can induce photothermal effect and light-excited oxygen-containing free radical generation process at the irradiation interface, and can be effectively used in the field of disinfection and sterilization after coupling
However, such materials currently used are generally carbon-based nanomaterials, semiconductor-based materials, plasmonic metal-based materials, etc., which have problems such as high cost, large amount, complicated preparation, and easy secondary environmental pollution, and are applied in practice. In the water environment, it is mostly powder dosing, which is difficult to recycle. Because of its nano-size effect, it is easy to cause environmental toxicity accumulation

Method used

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  • Preparation method of modified natural wood material and application of modified natural wood material in sewage treatment
  • Preparation method of modified natural wood material and application of modified natural wood material in sewage treatment
  • Preparation method of modified natural wood material and application of modified natural wood material in sewage treatment

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preparation example Construction

[0056] The preparation method of the lignin removal solution in the embodiment of the present invention is as follows: dissolving 0.2 mol of sodium acetate in 150 mL of deionized water, dropwise adding glacial acetic acid to adjust the pH value to 4.6, then adding deionized water to 300 mL, and then adding 0.07 mol Sodium chlorite, stirring and dissolving to obtain a lignin removal solution.

[0057] The components of the LB-agar solid medium in the test example of the present invention are as follows: each liter of the LB-agar medium contains 10.0 g of peptone, 5.0 g of yeast extract, 5.0 g of sodium chloride, 1.0 g of glucose, and 15.0 g of agar. Adjust pH to 7.0.

[0058] The components of the EMB-agar solid medium in the test example of the present invention are as follows: each liter of EMB-agar medium contains peptone 10.0g, lactose 10.0g, potassium dihydrogen phosphate 2.0g, agar 15.0g, eosin 0.4g, Blue 0.065g, the final adjusted pH value is 7.1.

[0059] The electron...

Embodiment 1

[0062] A preparation method of modified natural wood material, comprising the steps:

[0063] S1. Put the wood into the lignin removal solution, react in an oil bath at 100° C. for 8 hours, wash the wood with deionized water for 3 times, then put the wood into deionized water for 12 hours, and then immerse the wood in -20 After pre-freezing at ℃ for 24 hours, freeze-drying for 12 hours to obtain delignified wood;

[0064] TiO with a molar ratio of 1.25:1 2 with NaBH 4 After mixing by low-speed ball milling, put it in a corundum crucible, heat it up to 350°C at a rate of 10°C / min under an argon atmosphere, cool down to room temperature after 1 h of reaction, and then wash it with deionized water and anhydrous ethanol for 3 times, respectively, in an oven at 60°C Drying to obtain reduced black titanium;

[0065] S2. Put 0.5g of the reduced black titanium into 5mL of absolute ethanol, ultrasonically disperse for 30min, then drop-coat and modify it on the delignified wood 3 tim...

Embodiment 2

[0069] A preparation method of modified natural wood material, comprising the steps:

[0070] S1. Put the wood into the lignin removal solution, react in an oil bath at 110° C. for 9 hours, wash the wood with deionized water for 3 times, then put the wood into deionized water for 12 hours, and then immerse the wood in -20 After pre-freezing at ℃ for 24 hours, freeze-drying for 12 hours to obtain delignified wood;

[0071] TiO with a molar ratio of 1.2:1 2 with NaBH 4 After mixing by low-speed ball milling, put it into a corundum crucible, heat it up to 340°C at a rate of 10°C / min under an argon atmosphere, cool it to room temperature after reacting for 1.2 hours, and then wash it with deionized water and absolute ethanol for 3 times respectively, and put it in an oven for 60 °C. ℃ drying to obtain reduced black titanium;

[0072] S2. put 0.5g of the reduced black titanium into 5mL of absolute ethanol, ultrasonically disperse for 20min, then drop-coat and modify the delignif...

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Abstract

The invention belongs to the field of sewage treatment, and relates to a preparation method of a modified natural wood material and application of the modified natural wood material in sewage treatment. The preparation method of the modified natural wood material comprises the following steps that S1, wood is put into a lignin removal solution, after heating reaction, the wood is subjected to washing, dipping and freeze drying treatment, and lignin-removed wood is obtained; s2, TiO2 and NaBH4 are blended, low-heat reduction treatment is carried out, then cleaning and drying are carried out, and reduced black titanium is obtained; and S3, ultrasonically dispersing the reduced black titanium in a solvent, then dropwise coating the lignin-removed wood with the reduced black titanium, and drying the lignin-removed wood to obtain the modified natural wood material. The prepared modified natural wood material has efficient disinfection and sterilization performance, has the capacity of removing biological risk components, and has important significance on development of a sewage disinfection and sterilization technology.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and relates to a preparation method of a modified natural wood material and its application in sewage treatment. Background technique [0002] In addition to traditional nitrogen and phosphorus, heavy metals, and organic pollutants, new pollutants with certain biological risks, such as coliforms, disinfection by-products (DBPs), and antibiotic resistance genes (ARGs), should also be given enough attention. [0003] The problem of microbial contamination in the water environment is of great significance to the control of the spread of infectious diseases because of the risk of inducing the occurrence of diseases. The vast majority of microorganisms exist in the water environment by natural flow, mainly from soil erosion, and generally have no pathogenic effect on human beings; some of the microorganisms in the water environment come from garbage, human and animal excrement, and leather or food indu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/32C02F1/28B01J20/24
CPCB01J20/0248B01J20/0211B01J20/24C02F1/285C02F2101/30C02F2303/04B01J2220/42B01J2220/4825C02F2305/10C02F2305/023C02F1/30C02F1/725C02F1/286B01J21/063B01J31/061B01J31/38B01J37/0217B01J37/0236B01J37/04B01J37/06B01J37/16B01J37/343B01J35/39
Inventor 路璐晁伟翔何欣月杨睿洁于永杰李志达万成凤
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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