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Method for treating polluted bottom mud by using closure material

A technology of polluting sediment and using caps, which is applied in the field of environmental engineering, can solve the problems of single physical barrier effect of capping materials, impact on habitats, and single means, and achieve small penetration, in-situ stability, and high-efficiency adsorption Effect

Inactive Publication Date: 2008-07-09
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional in-situ treatment method is only a single physical barrier effect of the capping material, or only a single chemical stabilization effect of the dosing agent. Such a single method may affect the habitat and the treatment effect is not good.

Method used

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  • Method for treating polluted bottom mud by using closure material
  • Method for treating polluted bottom mud by using closure material
  • Method for treating polluted bottom mud by using closure material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Use 2-25mm sandstone and soil particles as the core layer of the inner layer, and its weight percentage ratio is 20%;

[0023] Phosphate rock and carbonatite rock are used, crushed to a particle size of 100-200 mesh, as the middle layer sealing layer; the weight percentage ratio is 78%;

[0024] Using cement and lime as the outer protective cementation layer, the proportion of its weight percentage is 2%;

[0025] Through processing, a small spherical capping material in the form of a three-layer structure is formed. (See figure 1 )

[0026] During the actual treatment operation, the granular capping material can be added to the surface of the contaminated sediment to be treated through the delivery vehicle or the special delivery pipeline. Its usage, that is, its status at the beginning of delivery and after a period of time, can be seen in the accompanying drawings figure 2 with image 3 .

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Abstract

The present invention relates to one kind of capping material for in-situ stabilizing polluted bed mud and its usage, and belongs to the field of environment engineering technology. The new-type capping material is spherical granular material in a three-layer structure, which includes one core layer of natural inorganic inert aggregate, reactive inorganic aggregate, etc and accounting for 15-35 wt%; one middle sealing layer of phosphate rock, carbonate rock, natural elite, etc and accounting for 60-80 wt%; and one outer protecting layer of cement, lime, gypsum, polymer adhesive, etc and accounting for 1-5 wt%. When it is used, the capping material is thrown to the surface of polluted bed mud, and after some time, it forms one blocking and adsorbing layer by means of expansion and adhesion to separate the polluted bed mud from the upper water and to degrade and decompose the pollutant.

Description

technical field [0001] The invention relates to a capping material used for in-situ stabilization of polluted bottom mud, a use and a treatment method, and belongs to the technical field of environmental engineering. Background technique [0002] The treatment of polluted sediment is a worldwide environmental problem. Contaminated sediment contains many environmentally hazardous substances, including some harmful organic substances and heavy metals, which have affected the normal ecological environment of aquatic organisms and normal human activities. . In response to the pollution of organic matter and heavy metals in the sediment of rivers, ponds, reservoirs, wetlands, lakes and other water bodies, many countries in the world have carried out research and remediation work on the contaminated sediment. [0003] The current main treatment methods are divided into two categories: in-situ treatment and off-site treatment. The technologies such as dredging in the off-site tre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00
Inventor 钱光人邓发庆程翔
Owner SHANGHAI UNIV
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