Application of porous ecological concrete system in remediation of heavy metal and/or nitrogen and phosphor polluted sediment

A technology for ecological concrete and polluted sediment, which is used in biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc., to maintain overall integrity, good habitat, and reduce heavy metals and nitrogen and phosphorus content Effect

Active Publication Date: 2015-09-02
广州和源生态科技发展股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the defects and deficiencies of the existing bottom mud covering repair technology, and to provide an application of a porous ecological concrete system in the restoration of heavy metal and / or nitrogen and phosphorus polluted bottom mud

Method used

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  • Application of porous ecological concrete system in remediation of heavy metal and/or nitrogen and phosphor polluted sediment
  • Application of porous ecological concrete system in remediation of heavy metal and/or nitrogen and phosphor polluted sediment
  • Application of porous ecological concrete system in remediation of heavy metal and/or nitrogen and phosphor polluted sediment

Examples

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Effect test

Embodiment 1

[0037] Example 1 Preparation of active porous ecological concrete

[0038] 1. Raw materials: commercially available zeolite, Portland cement, polycarboxylic acid superplasticizer and water.

[0039] 2. Raw material processing: crush, sieving, and cleaning the zeolite, and select the zeolite with a particle size of 5-10mm, with the target porosity> The 25% design is based on the mass ratio of zeolite: cement: water = 5.32:1:0.25, plus a polycarboxylate superplasticizer that accounts for 0.8% of the cement consumption.

[0040] 3. Preparation: Add 1 / 4 of the total water consumption (pre-mixed water) to the zeolite, stir for 1 to 2 minutes to make the surface of the zeolite wet, add cement and water reducing agent, and stir for about 1 to 2 minutes to make the surface of the zeolite uniform Wrap a layer of cement slurry shell, then add the remaining mixing water and continue to stir for about 2 to 3 minutes until completely mixed.

[0041] The active porous ecological concrete mixture pr...

Embodiment 2

[0042] Example 2 Preparation of active porous ecological concrete

[0043] 1. Raw materials: commercially available zeolite, Portland cement, polycarboxylic acid superplasticizer and water.

[0044] 2. Raw material processing: crush, sieving, and cleaning the zeolite, and select the zeolite with a particle size of 5-10mm, with the target porosity> 25% design, according to the mass ratio of zeolite: cement: water = 4.02:1:0.25, plus a polycarboxylic acid superplasticizer that accounts for 0.5% of the cement consumption.

[0045] 3. Preparation: Add 1 / 4 of the total water consumption (pre-mixed water) to the zeolite, stir for 1 to 2 minutes to make the surface of the zeolite wet, add cement and water reducing agent, and stir for about 1 to 2 minutes to make the surface of the zeolite uniform Wrap a layer of cement slurry shell, then add the remaining mixing water and continue to stir for about 2 to 3 minutes until completely mixed.

[0046] The active porous ecological concrete mixture...

Embodiment 3

[0047] Example 3 Preparation of active porous ecological concrete

[0048] 1. Raw materials: commercially available zeolite, Portland cement, polycarboxylic acid superplasticizer and water.

[0049] 2. Raw material processing: crush, sieving, and cleaning the zeolite, and select the zeolite with a particle size of 5-10mm, with the target porosity> 25% design, according to the mass ratio of zeolite: cement: water = 5.69:1: 0.30, plus a polycarboxylic acid superplasticizer which accounts for 1% of the cement consumption.

[0050] 3. Preparation: Add 1 / 4 of the total water consumption (pre-mixed water) to the zeolite, stir for 1 to 2 minutes to make the surface of the zeolite wet, add cement and water reducing agent, and stir for about 1 to 2 minutes to make the surface of the zeolite uniform Wrap a layer of cement slurry shell, then add the remaining mixing water and continue to stir for about 2 to 3 minutes until completely mixed.

[0051] The active porous ecological concrete mixture...

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Abstract

The invention discloses application of a porous ecological concrete system in remediation of heavy metal and/or nitrogen and phosphor polluted sediment. Porous ecological concrete comprises, by weight, activated coarse aggregate, cement and water according to the ratio of (4.02-5.69):1:(0.25-0.30); the activated coarse aggregate is one or any of zeolite, lava and activated carbon. In specific application, a porous ecological concrete covering layer of the activated porous ecological concrete is formed at a sediment-water interface; submerged plants are planted in the porous ecological concrete covering layer; under coaction of the porous ecological concrete covering layer and the submerged plants, internal release of the heavy metals and nitrogen and phosphorus in the sediment can be controlled effectively and stably for a long time; the porous ecological concrete covering layer helps well ensure overall structural completeness of a sediment covering layer, a good habitat is provided for the benthos, and the remediation and reconstruction of benthonic realm late in the remediation of the water body is facilitated.

Description

technical field [0001] The invention belongs to the technical field of restoration of surface water body polluted bottom mud. More specifically, it relates to the application of a porous ecological concrete system in the remediation of heavy metal and / or nitrogen and phosphorus contaminated sediment. Background technique [0002] In the initial stage of surface water environmental protection, people are mostly committed to cutting off or controlling the impact of external pollution sources in order to reduce the total amount of pollutants entering the water body in quantity. However, after the external source pollution that affects water quality has been effectively controlled, the water quality has not improved significantly as expected, and some pollution conditions have even worsened. Subsequent studies have found that the sediment, which has long been considered as the “reservoir” of reservoir pollutants, also acts as a “source” under certain conditions. When conditio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B3/12E02B3/14C02F3/32
CPCY02W10/10
Inventor 杨扬李星乔永民王栋宇陶然
Owner 广州和源生态科技发展股份有限公司
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