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Method of governing compound pollution of heavy metals of soil and application

A compound pollution and heavy metal technology, applied in the restoration of polluted soil, etc., can solve the problems of high cost, secondary pollution, and incomplete clearing, and achieve the effects of fast speed, reduction of harmful substance residues, and simple and easy technology

Inactive Publication Date: 2018-07-10
南京怡可帮生态环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0016] These methods have their own advantages and disadvantages, and most of them are used for water pollution control, but not many are used for large-scale soil pollution control, because the cost is too high, there is secondary pollution, and at the same time, it is not clear enough

Method used

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  • Method of governing compound pollution of heavy metals of soil and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Add 1000 grams of diethylenetriaminepentamethylenephosphonic acid, 500 grams of sodium ethylenediamine tetramethylene phosphonate, and 500 grams of sodium pyrophosphate in 50 liters of distilled water, slowly heat and dissolve, stir slowly, and wait until all After dissolving, add 500 g of sodium polyaspartate and stir slowly. After most of the solution is dissolved, after cooling, add 200 ml of concentrated hydrochloric acid and 500 g of sodium polyacrylate, and stir evenly.

[0029] 2. Add 1,500 ml of the above-mentioned 1-treated product to a soil column containing 50 kg of soil, and wash the heavy metals in the soil column. Before adding the eluent, add 8,000 ml of distilled water to the soil column to fully moisten it. soil column.

[0030]3. Slowly add 1500 ml of the eluate prepared in the above 1 in batches to the soil column after the above 2 treatment, place a collector under the soil column to collect the eluate from the soil column, and continue to add the...

Embodiment 2

[0032] 1. Add 5,000 grams of diethylenetriaminepentamethylenephosphonic acid, 800 grams of ethylenediamine tetramethylene phosphonate, and 1,000 grams of sodium pyrophosphate into 50 liters of distilled water, slowly heat and dissolve, and stir slowly until all After dissolving, add 1,000 g of sodium polyaspartate and stir slowly. After most of the solution is dissolved, after cooling, add 500 ml of concentrated hydrochloric acid and 1,000 g of sodium polyacrylate, and stir evenly.

[0033] 2. Add 2000 ml of the product treated in the above 1 to the soil column containing 50 kg of soil, and wash the heavy metals in the soil column. Before adding the eluent, add 10000 ml of distilled water to the soil column to fully moisten it. soil column.

[0034] 3. Slowly add 2000 ml of the eluate prepared in the above 1 to the soil column after the above 2 treatment in batches, place a collector under the soil column to collect the eluate from the soil column, and continue to add the elue...

Embodiment 3

[0036] 1. Add 10,000 grams of diethylenetriaminepentamethylene phosphonic acid, 1,000 grams of ethylenediamine tetramethylene phosphonate, and 1,500 grams of sodium pyrophosphate into 50 liters of distilled water, slowly heat and dissolve, and stir slowly until all After dissolving, add 1500 g of sodium polyaspartate and stir slowly. After most of the solution is dissolved, after cooling, add 800 ml of concentrated hydrochloric acid and 2000 g of sodium polyacrylate, and stir evenly.

[0037] 2. Add 4,000 ml of the above-mentioned 1-treated product to a soil column containing 50 kg of soil, and wash the heavy metals in the soil column. Before adding the eluent, add 30,000 ml of distilled water to the soil column to fully moisten it. soil column.

[0038] 3. Slowly add 4000 ml of the eluent prepared in the above 1 to the soil column in batches after the above 2 treatment, place a collector under the soil column to collect the eluate from the soil column, and continue to add the...

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Abstract

The invention relates to a method of governing compound pollution of heavy metals of soil and an application and belongs to the field of environmental protection. The method comprises the following steps: adding diethylenetriaminepenta acid, ethylene diamine tetra sodium, sodium pyrophosphate and sodium polyaspartate into distilled water; stirring the mixture to be dissolved; warming the mixture properly to fully dissolve the mixture; then adding hydrochloric acid and sodium polyacrylate into the mixture; uniformly stirring the mixture; and adding the mixture into polluted soil by various heavy metals to elute and various heavy metals in the soil simultaneously so as to eliminate pollution of the soil by the heavy metals. The soil is protected, the underground water is protected, and the food safety is guaranteed.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a method and application for controlling soil heavy metal compound pollution. Background technique [0002] Heavy metals in nature are mainly distributed in the atmosphere, water and soil. The distribution of heavy metals in different systems is different, and the sources are divided into natural sources and artificial sources. [0003] Through the analysis and comparison of the heavy metal data in the surface dust of the main functional areas of several provincial capital cities, the results show that the heavy metal content in the surface dust of industrial areas is the highest, the content of heavy metals in the surface dust of traffic areas is the lowest, and the content of heavy metals in the surface dust of commercial areas and residential cultural and educational areas is in the middle. Level. Zn and Pb are the elements with greater differences in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08B09C1/02
CPCB09C1/08B09C1/02
Inventor 吴洪生
Owner 南京怡可帮生态环境科技有限公司
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