Persulfate enhanced ball-milling treatment method of chemical waste

A persulfate and chemical technology, which is applied in the field of persulfate enhanced ball milling to treat chemical waste, can solve the problems of large material volume and long reaction time, and achieve the effect of short reaction time and low energy consumption

Inactive Publication Date: 2015-07-22
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There are at least the following disadvantages in the above-mentioned prior art: 1) lime is used as an additive, and there is a problem that the volume of the material after treatment is large; The removal efficiency is high, but it still takes more than 4 hours of ball milling time to achieve the complete removal effect

Method used

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  • Persulfate enhanced ball-milling treatment method of chemical waste
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  • Persulfate enhanced ball-milling treatment method of chemical waste

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment example 1

[0032] Sodium persulfate enhanced ball milling method for treating soil contaminated by lindane

[0033] 1. Preparation of contaminated soil

[0034] Soil: Take 1kg of soil 10-30cm below the surface of a bamboo forest in a certain campus, the soil is brown, loamy sandy soil structure (sand 82%; silt 10%; clay 8%), pH=7.3, organic matter content 0.6%

[0035] Soil standard addition (79.97mg / kg): After adding γ-HCH standard solution (solvent is acetone and dichloromethane mixed solution, volume ratio is 1:1) to the ground and sieved (70 mesh) soil, put it in the fume hood Volatile solvent inside, stir evenly with a glass rod for 5 minutes every morning and evening, for seven days.

[0036] 2. Ball milling conditions

[0037] The ball mill used was produced by the Instrument Factory of Nanjing University, the model is QM-QX2, and the ball mill jar and balls are made of stainless steel.

[0038] Ball loading: add 15 Φ8mm balls and 45 Φ5mm balls to four 100mL ball milling jars r...

specific Embodiment example 2

[0047] Sodium persulfate intensified ball milling method for drug compound sulfamethoxazole

[0048] 1. Ball milling conditions

[0049] The ball mill used was produced by the Instrument Factory of Nanjing University, the model is QM-QX2, and the ball mill jar and balls are made of zirconia.

[0050] Ball loading: Add 30 Φ8mm balls to four 100mL ball milling jars, and ensure that the quality difference in the symmetrical sampling jars is not higher than 0.01g.

[0051] Feeding: compound sulfamethoxazole tablet 0.5g (wherein containing sulfamethoxazole 0.4g, trimethoprim 0.08g), total mass is 5g of sodium persulfate and co-grinding reagent (reducing iron oxide powder, calcium oxide, hydrogen sodium oxide)

[0052] Nitrogen blowing: After blowing the ball mill tank with the materials under the slow nitrogen flow for about 1min, seal the ball mill.

[0053] Speed: The rotation speed is set to 500rpm, the revolution speed is set to 250rpm, and the revolution direction is revers...

specific Embodiment example 3

[0071] Sodium persulfate intensified ball milling method for treating tetrabromobisphenol A

[0072] 1. Ball milling conditions

[0073] The ball mill used was produced by the Instrument Factory of Nanjing University, the model is QM-QX2, and the ball mill jar and balls are made of zirconia.

[0074] Ball loading: Add 30 Φ8mm balls to four 100mL ball milling jars, and ensure that the quality difference in the symmetrical sampling jars is not higher than 0.01g.

[0075] Feed: Tetrabromobisphenol A 0.5g, sodium persulfate and co-grinding reagent (reduced iron oxide powder, calcium oxide, sodium hydroxide) with a total mass of 5g

[0076] Nitrogen blowing: After blowing the ball mill tank with the materials under the slow nitrogen flow for about 1min, seal the ball mill.

[0077] Speed: The rotation speed is set to 500rpm, the revolution speed is set to 250rpm, and the revolution direction is reversed alternately every 30min. Grind until the specified time and sample for testi...

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Abstract

The invention discloses a persulfate enhanced ball-milling treatment method of chemical waste. Persulfate assisted by a co-grinding agent is used, and a local high-temperature high-pressure environment is instantly generated under an action of mechanical force generated from high-speed revolution of a ball mill to induce generation of sulfate free radicals with strong oxidizing property, so that an organic compound can be quickly decomposed through oxidation. According to the invention, the method can be used for treating chemicals such as various waste pesticides, household medicaments, and fire retardants; the treating time is short; the efficiency is high; and fast treatment of chemical waste can be realized.

Description

technical field [0001] The invention relates to a treatment technology of chemical waste, in particular to a method for treating chemical waste with persulfate enhanced ball milling. Background technique [0002] Chemical waste refers to pure substances or mixtures that enter the environment through various links such as production, circulation and use, basically or completely lose their use value within a certain time and space range, and cannot be recycled and utilized. Chemical waste poses a great threat to human health and the ecological environment, and is a potential source of danger. In addition, due to the wide variety and complex and diverse inherent characteristics, the disposal of chemical waste is technically difficult. [0003] Among the traditional methods, incineration and pyrolysis technologies are widely used methods to deal with chemical waste. Incineration is a comprehensive treatment process of pyrolysis and deep oxidation of solid waste. Its advantage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62D3/38B09C1/08A62D101/28
CPCA62D3/38A62D2101/28B09C1/08
Inventor 刘希涛张晓慧
Owner BEIJING NORMAL UNIVERSITY
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