Capping material for treating eutrophic lake and preparation method thereof

A technology of eutrophication and capping, applied in chemical instruments and methods, water/sewage treatment, adsorption water/sewage treatment, etc., can solve the problem of low adsorption capacity and achieve the effect of inhibiting the release of phosphorus

Inactive Publication Date: 2009-09-02
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of known chemical agents is that the adsorption capacity is relatively low, and they can only partially remove soluble phosphate and other nutrients in water. Therefore, artificial synthesis and development of high-performance capping materials for removing eutrophic salts have attracted more and more attention.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation process and steps of the capping material in the present embodiment are as follows:

[0021] Raw material 1. adopts calcite (Shanghai Unilever company product), it is pulverized to the granular material that particle size crosses 200 mesh sieves, and its percentage by weight ratio is 78%;

[0022] Raw material 2. adopts lanthanum chloride (Shanghai Yuelong Chemical Factory product), and its percentage by weight ratio is 10%;

[0023] Raw material 1. adopts calcite (Shanghai Unilever company product), it is pulverized to the granular material that particle size crosses 200 mesh sieves, and its percentage by weight ratio is 78%;

[0024] Raw material 2. adopts lanthanum chloride (Shanghai Yuelong Chemical Factory product), and its percentage by weight ratio is 10%;

[0025] The raw material ③ uses cement as a protective cement, and its weight percentage ratio is 12%. Take the above-mentioned lanthanum chloride and prepare it into an aqueous solution with...

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PUM

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Abstract

The invention relates to a capping material for treating lake eutrophication in situ and a preparation method thereof. More specifically, it is a capping material for removing nutrient salts such as soluble phosphate in eutrophic lakes and a preparation method thereof. It belongs to the technical field of environmental protection treatment. The capping material of the present invention has the composition and weight percentage as follows: 1. natural carbonate rock or calcium industrial by-product is 65-70%; 2. rare earth tailings cerium salt or lanthanum salt or its rare earth oxide is 10-15% ; ③ inorganic cement material cement, lime, or gypsum, or organic polymer binder is 15 to 25%. The above raw materials were stirred and mixed at 20° C., washed, filtered, and dried to finally obtain a granular capping material. The capping material can absorb a large amount of soluble phosphate and other nutrients in the water body to form insoluble compounds, and sink to the surface of the mud. The capping material can self-form a layer of blocking adsorption layer, preventing the release of the phosphate that pollutes the bottom mud of the water body to the upper water body.

Description

technical field [0001] The invention relates to a capping material for treating lake eutrophication in situ and a preparation method thereof. More specifically, it is a capping material for removing nutrient salts such as soluble phosphate in eutrophic lakes and a preparation method thereof. It belongs to the technical field of environmental protection treatment. Background technique [0002] The main feature of lake pollution in China is water eutrophication, especially in urban lakes. Due to the interference of human activities, the eutrophication process is very rapid. The root cause of water eutrophication is that the soluble phosphate and other nutrients in the water exceed the standard, which exceeds the self-purification capacity of the lake. Lake sediment (also known as bottom mud) is an important reservoir of lake soluble phosphate and other nutrients. The salt will be gradually released and become the leading factor of the endogenous eutrophication of the lake. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/06C02F1/58C02F1/28
Inventor 钱光人于义忠陈丹邓发庆秦磊
Owner SHANGHAI UNIV
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