Preparation method and application of treating agent based on municipal sludge biochar

A technology of municipal sludge and biochar, applied in the field of functional materials and environmental water treatment, can solve the problems of complex catalyst preparation, difficult treatment of fouling membrane, secondary pollution, etc., and achieve resource utilization, superior adsorption performance, and pore structure. developed effect

Pending Publication Date: 2022-04-26
济南市环境研究院(济南市黄河流域生态保护促进中心)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the membrane filtration technologies in the prior art are difficult to remove pollutants and the contaminated membranes are difficult to deal with. Similarly, various modified biochars used as adsorbents are also difficult to remove pollutants fundamentally and may cause secondary pollution. ; Fenton-like technology based on hydroxyl radicals and advanced oxidation technology based on sulfate radicals have high degradation efficiency and no selectivity for organic pollutants, but catalysts are required to activate oxidants, and the preparation of existing catalysts is relatively complicated, such as based on kaolin , Attapulgite loaded modified materials, bimetallic / multimetallic catalyst materials, high cost or possible secondary pollution problems, limiting the application of these heterogeneous catalysts

Method used

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  • Preparation method and application of treating agent based on municipal sludge biochar
  • Preparation method and application of treating agent based on municipal sludge biochar
  • Preparation method and application of treating agent based on municipal sludge biochar

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Example 1, a treatment agent based on municipal sludge biochar, including an adsorbent and a catalyst, the adsorbent is porous sludge biochar (PSDBC), the catalyst includes magnetic sludge biochar (MSDBC) and zero-valent iron-loaded sludge biological Charcoal (ZVI@PSDBC).

Embodiment 2

[0048] Embodiment 2, the preparation method of porous sludge biochar (PSDBC) described in the above embodiment 1, includes the following steps: after cleaning the municipal sludge, dry it in an oven at 105°C for 30h, and use a mortar or grinder to carry out After grinding, sieve through an 8-mesh sieve to obtain sludge particles; according to the capacity of the tubular muffle furnace, take an appropriate amount of sludge particles and place them in the tubular muffle furnace. The heating rate was pyrolyzed at 800°C for 2 hours. After the temperature of the tube furnace dropped to room temperature naturally, it was taken out, soaked in 1mol / L hydrochloric acid solution for 24 hours, washed with ethanol and deionized water until pH = 7, and dried in an oven at 80°C. and then dried to obtain PSDBC.

[0049] Adsorption experiment of PSDBC on the dye rhodamine B (RhB): Weigh 0.6, 0.8, 1.0g / L PSDBC (with an accuracy of 0.0001g) into a 250mL beaker, add 100mL of the solution to be t...

Embodiment 3

[0052] Embodiment 3, in the above-mentioned embodiment 1, the preparation method of the porous sludge biochar (PSDBC) includes the following steps: after cleaning the municipal sludge, dry it in an oven at 105°C for 30 hours, and use a mortar or grinder to After grinding, sieve through an 8-mesh sieve to obtain sludge particles; according to the capacity of the tubular muffle furnace, take an appropriate amount of sludge particles and place them in the tubular muffle furnace. The heating rate is pyrolyzed at different temperatures (500°C, 600°C, 700°C, 800°C) for 2 hours. After the temperature of the tube furnace naturally drops to room temperature, it is taken out, soaked in 1mol / L hydrochloric acid solution for 24 hours, and washed with ethanol Washing, washing with deionized water to pH = 7, and drying in an oven at 80°C to obtain PSDBC.

[0053] Adsorption effect of PSDBC prepared at different temperatures on RhB: Weigh 1.0 g / L of PSDBC prepared at different temperatures i...

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Abstract

The invention discloses a preparation method and application of a treating agent based on municipal sludge biochar, and belongs to the field of functional materials and environmental pollution treatment. Municipal sludge is used as a raw material, the sludge biochar adsorbent is prepared through direct pyrolysis, and other pollutants such as dye in water are adsorbed and removed; the modified sludge biochar catalyst is prepared through iron modification, and persulfate/hydrogen peroxide is catalyzed to oxidize, degrade and remove chlorine-containing organic pollutant 2, 4-dichlorophenol, pesticide thiamethoxam and the like in water. The prepared material is high in adsorption and catalysis capacity and high in target pollutant degradation removal rate, and target pollutants (rhodamine B, 2, 4-dichlorophenol and thiamethoxam) with the concentration being 50 ppm can reach the removal rate of 99.5% or above through adsorption and oxidative degradation within 2 h. In order to expand the application range of the method, an actual wastewater test is carried out, and the result shows that the removal rate of COD (Chemical Oxygen Demand) and TOC (Total Organic Carbon) in actual wastewater by the combined process of catalytic oxidation and adsorption can reach more than 40%.

Description

technical field [0001] The invention relates to a treatment agent, in particular to a preparation method and application of a treatment agent based on municipal sludge biochar, and belongs to the technical field of functional materials and environmental water treatment. Background technique [0002] In recent years, with the rapid development of industry and the advancement of urbanization, the massive discharge and unreasonable disposal of industrial wastewater, the extensive use of chemical fertilizers and pesticides have resulted in toxic, harmful and difficult-to-biodegrade polycyclic aromatics, dyes, and pesticides. Organic pollutants exist in large quantities in the water environment, seriously threatening human health, and the pollution problem has become increasingly prominent. [0003] With the continuous improvement of my country's economic development level and urbanization level, most urban sewage treatment facilities above the county level have been constructed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/10C02F1/28B01J20/20C02F1/72B01J23/745B01J35/10C02F101/38C02F101/36C02F101/30
CPCC02F11/10Y02W10/40
Inventor 郑囡庄涛王锦张子杰刘姝睿郝曼
Owner 济南市环境研究院(济南市黄河流域生态保护促进中心)
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