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Method for improving seaside saline alkali soil by composite reagent

A technology of composite agent and saline-alkali soil, applied in the restoration of polluted soil, etc., can solve the problems of high cost and complex humic acid extraction process, and achieve the effect of improving saline-alkali soil and good activity

Inactive Publication Date: 2016-11-09
SHANGHAI ENVIRONMENTAL ENG DESIGN & RES INST CO LTD +1
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  • Application Information

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Problems solved by technology

However, because the extraction process of humic acid is complicated, the cost is high, and it is a chemical product, it has been used in soil for a long time, with advantages and disadvantages.

Method used

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Embodiment Construction

[0022] The implementation and effects of the present invention will be described below through specific examples.

[0023] According to a kind of compound agent method of the present invention improving seaside saline-alkali soil, extracting humic acid from garbage leachate makes compound agent, compound agent mixes with saline-alkali soil, is used for the improvement of seashore saline-alkali soil, comprises the following steps:

[0024] A. Biochemically treat landfill leachate to remove degradable components.

[0025] B. Lift the landfill leachate into the material membrane system through the lifting pump, concentrate and separate through the nanofiltration membrane, and obtain the concentrated liquid, which contains humic acid and divalent salt.

[0026] C. Separating the concentrated solution through the material membrane, extracting humic acid and removing divalent salt.

[0027] D. Extract the humic acid from the landfill leachate to prepare a compound agent, wherein th...

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Abstract

The invention relates to a method for improving seaside saline alkali soil by a composite reagent. The composite reagent is prepared by extracting humic acid from garbage leachate, and is mixed with the saline alkali soil. The method comprises the following steps: the garbage leachate is biochemically treated to remove degradable components; the garbage leachate is hoisted into a material film system by a hoisting pump for separation by a nanofiltration film to obtain concentrated liquid, and the concentrated liquid contains the components of the humic acid and divalent salt; the concentrated liquid is separated by a material film, the humic acid is extracted, and the divalent salt is removed; the humic acid of the garbage leachate is extracted to prepare the composite reagent, wherein the humic acid has a concentration range of 5-8%; the total quantity of the humic acid and the pH value in the composite reagent are measured; and the composite reagent and the seaside saline alkali soil are mixed in proportion for improving the seaside saline alkali soil. The method is excellent in improvement effect of the saline alkali soil, reduces the treatment cost, can prominently reduce the saline alkali degree of the improved soil, and facilitates development of the soil repair work.

Description

technical field [0001] The invention belongs to the field of soil restoration in environmental protection, and in particular relates to a method for improving seaside saline-alkali soil with a compound agent. Background technique [0002] Saline-alkali soil refers to a series of soils that are affected by the saline-alkali components in the soil, including various types of saline soil and alkaline soil, and other types of soil with different degrees of salinization and alkalization. my country's coastal saline-alkali soil is mainly distributed in the eastern coastal area of ​​the North China Plain, with a total area of ​​about 2.114 million hm 2 , accounting for about 7.03% of the total area of ​​saline-alkali soil. The soil salinity is mainly chloride, which mainly comes from marine stratum deposition, inappropriate agricultural irrigation and local seawater intrusion caused by land subsidence. [0003] The hazards of saline-alkali soil mainly include the following three a...

Claims

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Application Information

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IPC IPC(8): B09C1/08
CPCB09C1/08
Inventor 张国芳诸毅宋立杰林雅洁付乾陈奕刘惠
Owner SHANGHAI ENVIRONMENTAL ENG DESIGN & RES INST CO LTD
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