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A comprehensive treatment method for coastal saline-alkali land

A technology for comprehensive treatment and saline-alkali land application in the field of contaminated soil remediation, which can solve problems such as long residence time, harm to plants, and application restrictions, and achieve the effect of broad application prospects, high application prospects, and high practical value

Active Publication Date: 2022-04-29
王帘里
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in practical application, physical methods, chemical methods and biological methods all have certain shortcomings in the application of saline-alkali land improvement, which leads to the limitation of their application.
Moreover, in the prior art, the improvement and treatment effect on saline-alkali land polluted by heavy metals is poor. Set, harming plants grown in saline soil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A comprehensive treatment method for coastal saline-alkali land, comprising the following steps:

[0035] (1) Set up a salt barrier layer: set up a layer of salt barrier layer at a depth of not less than 40cm below the surface to avoid the upward movement of groundwater with high salt content;

[0036] (2) Irrigation and salt washing: build a water storage cofferdam on the periphery of the saline-alkali land, so that the saline-alkali land forms a reservoir structure, and pour water into the saline-alkali land to dissolve the soil salt;

[0037] (3) Electrolysis-adsorption treatment: a positive electrolytic cell and a negative electrolytic cell are respectively set up in the saline-alkali soil. The cathodic electrolysis cell is isolated, the adsorption wall is filled with adsorption materials, the muddy water in the saline-alkali soil is the anode electrolyte, the power is turned on for electrolysis-adsorption treatment, the adsorption wall is replaced after a certain p...

Embodiment 2

[0043] A comprehensive treatment method for coastal saline-alkali land, comprising the following steps:

[0044] (1) Set up a salt barrier layer: set up a layer of salt barrier layer at a depth of not less than 40cm below the surface to avoid the upward movement of groundwater with high salt content;

[0045] (2) Irrigation and salt washing: build a water storage cofferdam on the periphery of the saline-alkali land, so that the saline-alkali land forms a reservoir structure, and pour water into the saline-alkali land to dissolve the soil salt;

[0046] (3) Electrolysis-adsorption treatment: a positive electrolytic cell and a negative electrolytic cell are respectively set up in the saline-alkali soil. The cathodic electrolysis cell is isolated, the adsorption wall is filled with adsorption materials, the muddy water in the saline-alkali soil is the anode electrolyte, the power is turned on for electrolysis-adsorption treatment, the adsorption wall is replaced after a certain p...

Embodiment 3

[0059] A comprehensive treatment method for coastal saline-alkali land, comprising the following steps:

[0060] (1) Set up a salt barrier layer: set up a layer of salt barrier layer at a depth of not less than 40cm below the surface to avoid the upward movement of groundwater with high salt content;

[0061] (2) Irrigation and salt washing: build a water storage cofferdam on the periphery of the saline-alkali land, so that the saline-alkali land forms a reservoir structure, and pour water into the saline-alkali land to dissolve the soil salt;

[0062] (3) Electrolysis-adsorption treatment: a positive electrolytic cell and a negative electrolytic cell are respectively set up in the saline-alkali soil. The cathodic electrolysis cell is isolated, the adsorption wall is filled with adsorption materials, the muddy water in the saline-alkali soil is the anode electrolyte, the power is turned on for electrolysis-adsorption treatment, the adsorption wall is replaced after a certain p...

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Abstract

The invention belongs to the technical field of contaminated soil remediation, and in particular relates to a method for comprehensive treatment of coastal saline-alkali land, comprising the following steps: setting a salt barrier layer, irrigating and washing salt, electrolytic-adsorption treatment, improving soil quality with an improving agent, and applying the improved soil on the improved soil. Mixed planting of saline-alkali-tolerant vegetation and heavy metal-enriched vegetation. The invention comprehensively utilizes various saline-alkali land treatment methods, has high treatment efficiency, and has good effect on the improvement of heavy metal-polluted saline-alkali land, has high practical value and broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of contaminated soil restoration, and in particular relates to a method for comprehensive treatment of coastal saline-alkali land. Background technique [0002] Soil salinization is a global environmental problem. According to the incomplete statistics of UNESCO and FAO, the area of ​​saline-alkali land in the world is 954.38 million hectares, of which 99.13 million hectares are in my country. Among them, coastal saline-alkali land is widely distributed, involving 11 regions in my country. The coastlines of provinces (districts) and cities account for 40% of the total area of ​​saline-alkali land in my country. The formation of alkaline soil and alkalized soil in my country is mostly related to the accumulation of carbonate in the soil, so the degree of alkalization is generally high, and plants in severe saline-alkali soil areas can hardly survive, which has brought great obstacles to agricultural production...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01B79/00A01B79/02C09K17/08C09K17/14C09K101/00C09K109/00B09C1/08B09C1/10
CPCA01B79/00A01B79/02C09K17/08C09K17/14B09C1/085B09C1/105C09K2101/00C09K2109/00B09C2101/00
Inventor 王帘里黄铿
Owner 王帘里
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