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Method for effectively preventing and harnessing soil phosphor loss

A soil and soil moisture technology, applied in the restoration of polluted soil, etc., can solve the problems of high phosphorus supply intensity, high water-soluble phosphorus content, and the risk of loss into water bodies

Inactive Publication Date: 2008-08-20
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

This is a further indication of the high content of water-soluble phosphorus in vegetable garden soils, the high intensity of phosphorus supply and the high risk of loss into water bodies

Method used

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  • Method for effectively preventing and harnessing soil phosphor loss
  • Method for effectively preventing and harnessing soil phosphor loss

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Experimental program
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Embodiment Construction

[0026] A kind of method of effectively preventing and treating soil phosphorus loss of the present invention, carries out according to the following steps:

[0027] 1. Prepare basic materials:

[0028] A. Pure polyaluminum, polyaluminum containing Ca, containing SO 4 2- Polymerized aluminum, Al 2 (SO 4 ) 3 .

[0029] Polyaluminum chloride (abbreviated as PAC) was purchased from Tianjin Dagang Oilfield Tianshui Industrial Company. It is a new type of high-efficiency inorganic polymer flocculant. It is actually an intermediate product of the kinetics of the hydrolysis of aluminum salts in the hydroxyl polymerization process. The basic chemical formula is: [ al 2 (OH)nCl 6-n ]m, where n≤5, m≤10; Al 2 (SO 4 ) 3 For analytical purity. al 2 (SO 4 ) 3 For chemical pure drugs.

[0030] B. Contaminated soil: collected from the surface soil of the Taohua Island vegetable field in Hanyang, Wuhan, with a depth of more than 0cm to 20cm, and the available phosphorus content i...

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Abstract

The invention relates to a method for preventing phosphorus loss from soil, which is used for vegetable soil with effective phosphorus content being 236.118 mg / kg and depth being 0 to 20 cm. The method employs polymerized aluminum to restore phosphorous-contaminated soil, and the effect fixing effective phosphorous is good, when the consumption of polymerized aluminum is 135-405 mg. Al / kg and effective time is three months, the fixed effective phosphorous amounts to 13.39-34.95%. Said polymerized aluminum is one of pure polymerized aluminum, calcium-containing polymerized aluminum, sulfate radical-containing polymerized aluminum, and aluminum sulfate. The invention can fix effective phosphorous in vegetable soil and provides a method for treating non-point phosphorous pollution.

Description

technical field [0001] The invention relates to an effective method for preventing and controlling soil phosphorus loss, which relates to the technical field of environmental protection and belongs to the soil treatment and restoration technology of phosphorus-enriched vegetable fields. Background technique [0002] Polyaluminum chloride (PAC for short) is a new type of high-efficiency inorganic polymer flocculant, which is an intermediate product of the kinetics of the hydrolysis of aluminum salts in the hydroxyl polymerization process. The basic chemical formula is: [Al 2 (OH)nCl 6-n ] m , where n≤5, m≤10. [0003] In recent decades, polyaluminum chloride (PAC), as a new type of high-efficiency inorganic polymer flocculant, has been widely used in the field of water treatment coagulation. The main component of polyaluminum chloride (PAC) to exert coagulation and flocculation performance in the coagulation process is the hydroxyl polymerization form. There are many ways...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00
Inventor 梁玉英朱永官黄益宗
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI