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Degradation method of TPHP, biochar-inorganic mineral composite material and preparation method of biochar-inorganic mineral composite material

A technology of inorganic minerals and biochar, applied in chemical instruments and methods, water pollutants, water/sewage treatment, etc., can solve problems such as unfavorable large-scale promotion and application, expensive cobalt materials, complicated preparation process, etc., and achieve governance effects The effect of stability, low cost and wide source of materials

Active Publication Date: 2022-02-01
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cobalt material used in this method is expensive and harmful to the environment. The material preparation process is complicated and the cost is high, which is not conducive to large-scale application

Method used

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  • Degradation method of TPHP, biochar-inorganic mineral composite material and preparation method of biochar-inorganic mineral composite material
  • Degradation method of TPHP, biochar-inorganic mineral composite material and preparation method of biochar-inorganic mineral composite material
  • Degradation method of TPHP, biochar-inorganic mineral composite material and preparation method of biochar-inorganic mineral composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] See attached figure 1 , figure 2 , the N-doped biochar-inorganic mineral composite material used to implement the TPhP (triphenyl phosphate) degradation method provided in this example is ball-milled modified Fe 2 o 3 One of @MBC or FeO(OH)@MBC, where MBC is self-derived N-doped biochar, and it is combined with inorganic mineral Fe 2 o 3 Or FeO(OH) powder was modified by ball milling at the same time.

[0053] see figure 1 , the Fe 2 o 3 Compared with traditional biochar materials, the microstructural characteristics of @MBC (or FeO(OH)@MBC) materials change more obviously. Due to the process of preparing biochar-inorganic minerals by ball milling, the original carbon skeleton structure of biochar is broken, and the particle size of biochar becomes smaller and has an irregular flaky fragment structure. More active sites can be exposed during the process. Inorganic mineral Fe 2 o 3 Or FeO(OH) is bound to the surface of the biochar fragment structure through ...

Embodiment 2

[0074] This example is a specific application of the technical solution provided in Example 1. The key point is to prepare various self-derived N-doped biochar MBCs obtained at different pyrolysis temperatures, and further prepare them as Fe 2 o 3 @MBC or FeO(OH)@MBC composite materials, and the performance and parameters (degradation time, degradation rate, maximum degradation rate, change trend, etc.) of various materials for catalysis, activation of PDS, adsorption, and degradation of TPhP were measured.

Embodiment 2-A

[0076] On the basis of the preparation method and preparation conditions of the composite material described in Example 1, the addition ratio of biochar and inorganic minerals (mass ratio of biochar to inorganic minerals) was selected to be 1:2 by secondary pyrolysis at 350°C, and the ball-milling ratio 1:100, the speed of ball milling modification is 500r / min, and the duration of ball milling modification is 12h. 2 o 3 @MBC and FeO(OH)@MBC were used as activators, and the degradation performance was determined.

[0077] To the TPhP sample solution with a measured concentration of 3.26 mg / L, a certain amount of biochar prepared with a secondary pyrolysis temperature of 350 °C, and its combination with inorganic minerals (Fe 2 o 3 , FeO(OH)) was added at a mass ratio of 1:2, the mass ratio of the composite material to the grinding ball was 1:100 during ball milling modification, the speed of the ball mill was 500r / min, and the cumulative time of ball milling was 12h. 2 o 3 ...

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Abstract

The invention discloses a degradation method of TPHP, a biochar-inorganic mineral composite material and a preparation method of the biochar-inorganic mineral composite material. The degradation method of the TPHP comprises the following steps: S1, preparing an N-doped biochar-inorganic mineral composite material; S2, measuring the concentration of TPHP in sewage and the degradation rate of the prepared composite material, and calculating the dosage of the composite material required by degradation; S3, adding PDS into a water body of the sewage, adjusting the concentration of the PDS to a preset value, adding the composite material, and carrying out stirring or oscillating reaction for 4-8 h so as to allow the PDS to be catalyzed and activated by the composite material and the TPHP in the water body to be adsorbed and degraded; and S4, measuring the concentration of the TPHP in the treated water body, and if the concentration does not reach the standard, repeating the steps S2-S3 until the concentration reaches the standard. The invention also provides the biochar-inorganic mineral composite material and the preparation method thereof. The method and the material provided by the invention are simple in process, wide in source, friendly to environment, high in efficiency and low in cost, and can meet the requirements of large-scale popularization and application.

Description

technical field [0001] The invention belongs to the technical fields of sewage treatment and environmental protection, and in particular relates to a method for degrading TPhP in water, a biochar-inorganic mineral composite material and a preparation method thereof. Background technique [0002] As an important member of phosphorus-based flame retardants, organophosphate esters (OPEs) are replacing brominated flame retardants and are widely used in production practice. During the production, processing and product use, these substances will enter various environmental media in various forms and become environmental pollutants, posing a potential threat to ecology and human health. Studies have pointed out that OPEs have biological toxicity such as carcinogenicity, mutagenicity, neurotoxicity and genotoxicity. In order to avoid and reduce the health risks of OPEs, in addition to controlling the discharge of OPEs from the source, it is particularly important to completely rem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F101/34C02F101/30
CPCC02F1/725C02F2101/34C02F2101/30
Inventor 于云江常兆峰钟紫娟郭浩博向明灯李红艳
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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