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A bio-purification retention zone for municipal roads in sponge cities

A technology for municipal roads and biological purification, applied in the direction of roads, roads, silicon compounds, etc., can solve the problems that suspended particles cannot pass through, and the treatment effect of heavy metals is poor, so as to improve cation exchangeability, strong physical and chemical adsorption capacity, and increase The effect of large specific surface area

Active Publication Date: 2019-09-03
温州嘉豪建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Common pollutants in rainwater include suspended particles, heavy metals, organic matter, etc., while the main components of the biological purification layer are river sand, fly ash, etc., which can only physically filter rainwater and prevent suspended particles from passing through. For the treatment of heavy metals The effect is poor and needs to be improved

Method used

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  • A bio-purification retention zone for municipal roads in sponge cities

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A kind of bio-purification retention zone for municipal roads in sponge cities, such as figure 1As shown, it includes planting soil layer, filter layer and drainage layer from top to bottom. The planting soil layer is composed of soil suitable for plant growth and is used for planting green plants; the filter layer includes fine sand layer A, adsorption layer A, adsorption layer B, fine sand layer B, fine sand layer A and fine sand layer from top to bottom Layer B is composed of fine sand with a particle size of 0.125-0.25mm; the drainage layer is composed of pebbles or gravel with a particle size of 10-30mm. Perforated drainage pipes for rainwater inflow are laid on the drainage layer, and overflow pipes are connected at intervals along the length of the perforated drainage pipes, and the overflow pipes pass through the filter layer and the planting soil layer and are higher than the surface of the planting soil layer.

[0048] After the rainwater flows to the plantin...

Embodiment 2

[0050] Adsorption layer A in embodiment one comprises the following components by weight: 80 parts of modified attapulgite, 30 parts of modified montmorillonite.

[0051] The preparation process of modified attapulgite is as follows:

[0052] In the first step, according to the mass ratio of solid to liquid of 1:50, attapulgite and water are mixed and stirred evenly, and then a dispersant accounting for 2% of the mass of attapulgite is added, and the dispersant is composed of sodium polyacrylate and sodium polyacrylate with a mass ratio of 1:1. It is compounded with sodium hexametaphosphate, then stirred at 600r / min for 2 hours, left to stand, and after stable stratification occurs, take the upper suspension, and then heat to 100°C until the water is completely evaporated, crushed, and passed through a 200-mesh sieve to obtain purification After the attapulgite;

[0053] The second step is to mix the purified attapulgite with the acid solution according to the solid-to-liquid...

Embodiment 3

[0059] Adsorption layer A in embodiment one comprises the following components by weight: 100 parts of modified attapulgite, 50 parts of modified montmorillonite.

[0060] The preparation process of modified attapulgite is as follows:

[0061] In the first step, according to the mass ratio of solid to liquid of 1:50, attapulgite and water are mixed and stirred evenly, and then a dispersant accounting for 3% of the mass of attapulgite is added, and the dispersant is composed of sodium polyacrylate and sodium polyacrylate with a mass ratio of 1:1. It is compounded with sodium hexametaphosphate, then stirred at 800r / min for 3 hours, left to stand, and after stable stratification occurs, take the upper layer suspension, and then heat to 105°C until the water is completely evaporated, crushed, and passed through a 200-mesh sieve to obtain purification After the attapulgite;

[0062] The second step is to mix the purified attapulgite with the acid solution according to the solid-to...

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Abstract

The invention discloses a biological cleaning retention belt for a sponge city municipal road. The biological cleaning retention belt for the sponge city municipal road is composed of sequentially from top to bottom, a planting soil layer, a filtering layer and a drainage layer, wherein the drainage layer is provided with a pored drainage pipe, which is connected in the length direction with overflow pipes at intervals extending out of the planting soil layer; the filtering layer is composed of, sequentially from top to bottom, a fine sand layer A, an adsorbing layer A, an adsorbing layer B and a fine sand layer, and the adsorbing layer B is composed of, by weight part, 80-100 parts of modified attapulgite and 30-50 parts of montmorillonoid. Rainwater can pass sequentially through the finesand layer A, the adsorbing layer A, the adsorbing layer B and the fine sand layer B, the fine sand layer A mainly achieves the effects of filtering particulates contained in the rainwater, the adsorbing layer A and the adsorbing layer B mainly achieve the effects of adsorbing heavy metal and organic pollutants in the rainwater, and the fine sand layer B mainly serves as a cushion layer, separates the drainage layer and the adsorbing layer B and ensures integrity of the adsorbing layer B.

Description

technical field [0001] The invention relates to municipal construction, in particular to a biological purification retention belt used for municipal roads in sponge cities. Background technique [0002] Sponge city is a new generation of urban stormwater management concept, which is used for water absorption, water storage, water seepage, water purification, release and use the stored water when needed, and solve the problem of traditional road water accumulation. Bioretention facilities are part of the sponge city. They are built in low-lying areas. They store infiltration and purify runoff rainwater through plants, soil and microbial systems. According to different application locations, they are divided into rain gardens, bioretention zones, and high flower beds. Bioretention belts are generally set on both sides of the lane, which not only play the role of water storage and water purification, but also separate the lanes. [0003] The Chinese patent with the publication...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C11/22E01C11/00C01B33/40B01J20/12B01J20/24C02F1/28C02F101/20C02F101/22C02F103/00
Inventor 谢昌波吴春同李正旦王锋
Owner 温州嘉豪建设有限公司
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