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Artificial compound soil layer percolation system for removing polybrominated diphenyl ether

A polybrominated diphenyl ether and artificial compounding technology, which is applied in the field of environmental engineering, can solve problems such as limited application, and achieve the effects of wide application range, good effluent quality, and simple system maintenance

Active Publication Date: 2017-03-29
李思诺
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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  • Artificial compound soil layer percolation system for removing polybrominated diphenyl ether
  • Artificial compound soil layer percolation system for removing polybrominated diphenyl ether
  • Artificial compound soil layer percolation system for removing polybrominated diphenyl ether

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preparation example Construction

[0036] The preparation of the adsorption and aerobic degradation layer 2 particle medium, after mixing the materials evenly, adding clean water accounting for 5-8% of the total weight of the mixture, stirring evenly, aging at 2-6°C for 12-16 hours, using The mechanical mold is extruded once, dried naturally for 4-6 hours, dried at 80-120°C for 10-12 hours, then roasted in a muffle furnace at 400-500°C for 3-5 hours under the condition of feeding nitrogen, and cooled with the furnace Form after reaching room temperature.

[0037] The preparation procedure of the biochar is as follows: firstly, the agricultural waste straw is crushed into small pieces of 1 to 3 cm, heated in an oxygen-limited rotary muffle furnace catalyzed by sulfonated coal at 160 to 200 ° C for 2 to 4 hours, and naturally cooled to Prepared at room temperature.

[0038] The bottom of the supporting layer 4 is provided with a perforated water collection pipe, and a non-woven interlayer with a pore diameter of...

Embodiment 1

[0043] An artificial composite soil infiltration system for strengthening the removal of polybrominated diphenyl ethers, which intercepts aerobic degradation layer 1 composed of fine sand and river surface sediments in the river bed of Chaobai River with a mass ratio of 5:10:60:1:10:0.5 , Natural farmland soil in Daxing District, biochar, and Chaobai River reclaimed water recharge area are rich in Proteobacteria and Acidobacteria. The composite medium is composed of soil and zero-valent iron powder. The specific surface area after mixing is 12.838m 2 / g, the filling thickness is 30cm.

[0044] Adsorption and aerobic degradation layer 2 is a filter prepared by medium-temperature heat treatment of materials such as fly ash, alkali-extracted black carbon, biomass, zeolite powder, diatomite or sepiolite powder with a mass ratio of 70:1:3:2:25. Adsorption granular medium, the medium has an organic matter content of 5.7g / kg and a specific surface area of ​​20.6m 2 / g, particle comp...

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Abstract

The invention relates to an artificial compound soil layer percolation system for removing polybrominated diphenyl ether, wherein the system sequentially comprises a trapping aerobic degradation layer (1), an adsorption facultative degradation layer (2), an exogenous electron donor strengthening degradation layer (3) and a supporting layer (4) from top to bottom. According to the present invention, the system can remove more than 90% of polybrominated diphenyl ether after the continuous operation for 3-5 years, has the hydraulic load of more than 0.5 m / d, and is used in the application of the regenerated water to nourish the groundwater river bed through the river and lake utilization, the deep purification of the polybrominated diphenyl ether-polluted water body, and the ground design of the electronic demolition place.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and specifically relates to an artificial composite soil infiltration system for removing polybrominated diphenyl ethers. Advanced deep cycle purification process and ground design for pollution prevention and control of electronic dismantling sites. Background technique [0002] Tens of billions of tons of recycled water are discharged into nearby rivers and lakes in my country every year, and this part of recycled water naturally conserves groundwater through river and lake utilization, landscaping and farmland irrigation, among which trace amounts of polybrominated diphenyl ethers pose a serious threat to the safety of groundwater and even drinking water. threaten. Polybrominated diphenyl ethers (PBDEs), as a brominated additive flame retardant, are widely used in the production of plastics, textiles, circuit boards and other products. Polybrominated diphenyl ethers have end...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/36
CPCC02F1/001C02F1/281C02F1/283C02F3/30C02F9/00C02F2101/36C02F2203/006C02F2301/08
Inventor 李思诺
Owner 李思诺
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