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Contaminated water body bottom mud reoxygenation type repairing agent, preparation method and applications thereof

A repairing agent and bottom mud technology, applied in the field of re-oxygenation repairing agent and its preparation for contaminated water bottom mud, can solve the problems of unsuitable pH value adjustment, slow down the reaction rate, enhance the metabolic capacity, and improve the biocompatibility Effect

Active Publication Date: 2013-02-13
福建光宇环保科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the content of N and P in eutrophic water body is relatively high, (NH 4 ) 2 SO 4 and KH 2 PO 4 Obviously not suitable for pH adjustment of such water bodies

Method used

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  • Contaminated water body bottom mud reoxygenation type repairing agent, preparation method and applications thereof
  • Contaminated water body bottom mud reoxygenation type repairing agent, preparation method and applications thereof
  • Contaminated water body bottom mud reoxygenation type repairing agent, preparation method and applications thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0054] The components of the restoration agent in this embodiment include: 0.02-0.03 parts by weight of polyvinyl alcohol (PVA), 2-3 parts by weight of calcium peroxide, and 1-2 parts by weight of activated carbon. The degree of polymerization of the polyvinyl alcohol ranges from 1700 to 1800; the calcium peroxide is in powder form; the mesh number of the activated carbon ranges from 20 mesh to 100 mesh.

[0055] The preparation process of above-mentioned restorative agent is:

[0056] (1) Preparation of PVA solution: the PVA solution is prepared from PVA and water, and the range of mass percent concentration is between 1% and 2%;

[0057] (2) Weigh each raw material in proportion: 2 to 3 parts by weight of calcium peroxide, 1 to 2 parts by weight of activated carbon, and 1 to 3 parts by weight of PVA solution; then mix the weighed calcium peroxide and activated carbon evenly, and gradually add PVA solution, and stir rapidly to obtain a viscous mixture;

[0058] (3) Put the ...

Embodiment 2

[0061] The repair agent described in this embodiment comprises: 0.04-0.05 parts by weight of polyvinyl alcohol (PVA), 3-4 parts by weight of calcium peroxide, 1-1.5 parts by weight of activated carbon, and 3-5 parts by weight of tourmaline. The degree of polymerization of the polyvinyl alcohol ranges between 1700 and 1800; the calcium peroxide is powder; the mesh number of the activated carbon is between 20 mesh and 100 mesh; the tourmaline is powder, the mesh The number is 200 mesh.

[0062] The preparation process of above-mentioned restorative agent is:

[0063] (1) Preparation of PVA solution: the PVA solution is prepared from PVA and water, and the range of mass percent concentration is between 1% and 2%;

[0064] (2) Weigh each raw material in proportion: 3~4 parts by weight of calcium peroxide, 1~1.5 parts by weight of activated carbon, 3~5 parts by weight of tourmaline, 2~5 parts by weight of PVA solution; then weigh the calcium peroxide , Activated carbon and tourma...

Embodiment 3

[0068] In this embodiment, the components of the restoration agent include: 0.05-0.06 parts by weight of polyvinyl alcohol (PVA), 6 parts by weight of calcium peroxide, 2-3 parts by weight of activated carbon, and 0.5-1 part by weight of sucrose fatty acid ester. The degree of polymerization of the polyvinyl alcohol ranges from 1700 to 1800; the calcium peroxide is powdery; the mesh number of the activated carbon ranges from 20 mesh to 100 mesh; the lipophilicity of the sucrose fatty acid ester Balance values ​​range between 11 and 15.

[0069] The preparation process of above-mentioned restorative agent is:

[0070] (1) Preparation of PVA solution: the PVA solution is prepared from PVA and water, and the range of mass percent concentration is between 1% and 2%;

[0071](2) Weigh each raw material in proportion: 6 parts by weight of calcium peroxide, 2 to 3 parts by weight of activated carbon, 0.5 to 1 part by weight of sucrose fatty acid ester, 2.5 to 6 parts by weight of PV...

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Abstract

The present invention provides a contaminated water body bottom mud reoxygenation type repairing agent, a preparation method and applications thereof. The contaminated water body bottom mud reoxygenation type repairing agent is prepared by mixing calcium peroxide, active carbon and polyvinyl alcohol according to a certain ratio, wherein oxygen can be persistently, stably and slowly released through the repairing agent. The repairing agent is directly poured to the surface of bottom mud, and the surface layer of the bottom mud is gradually changed into an aerobic state from an anaerobic state along with long time and effective oxygen release so as to promote aerobic microbial growth and metabolism, strengthen a pollutant degradation process, control releases of nutrients such as N and P in the bottom mud, and reduce a eutrophication degree of the water body, such that the water body is gradually restored to a benign ecological environment. In addition, an oxidation-reduction electric potential of the surface layer of the bottom mud is improved, and the pH value of the surface layer of the bottom mud is correspondingly changed, such that a precipitation rate of heavy metals in the bottom mud is significantly reduced, and contamination on the overlying water body is reduced.

Description

technical field [0001] The invention relates to the field of water environment restoration, in particular to a re-oxygenation type restoration agent for sediment in polluted water bodies and its preparation method and application. Background technique [0002] Water body sediment pollution is a worldwide environmental problem. Pollutants enter the water body through atmospheric deposition, sewage discharge, rainwater leaching and scouring, and finally deposit in the bottom mud and gradually enrich. After the exogenous pollution is effectively controlled, the pollutants in the sediment may still cause "secondary pollution" to the water body. The U.S. EPA pointed out in a survey report in 1998 that in the 2,100 fish consumption incidents that have occurred in the United States, it has been repeatedly confirmed that the pollution comes from the bottom mud. With the process of urbanization and industrial development in China, the problem of sediment pollution has become increa...

Claims

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Application Information

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IPC IPC(8): C02F11/02C02F1/66
Inventor 杨磊李宇光胥峥林逢凯杨洁华丹芸李玲珑林建萍
Owner 福建光宇环保科技有限公司
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