Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Acid magnesium aluminum hydroxide as well as preparation method and application thereof in improvement of saline-alkali soil

A magnesium aluminum hydroxide, acidic technology, applied in the direction of alumina/aluminum hydroxide, chemical instruments and methods, applications, etc., can solve the problems of modifier pollution risk, poor pertinence, narrow application range, etc., and achieve high-efficiency desalination Effects of improvement, expansion of application area, and prevention of re-salination

Inactive Publication Date: 2018-01-09
TIANJIN UNIV
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems existing in the prior art, the present invention provides an acidic magnesium aluminum hydroxide and its preparation method, which overcomes the problems of pollution risk, narrow application range and poor pertinence of the modifier in the prior art.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Acid magnesium aluminum hydroxide as well as preparation method and application thereof in improvement of saline-alkali soil
  • Acid magnesium aluminum hydroxide as well as preparation method and application thereof in improvement of saline-alkali soil
  • Acid magnesium aluminum hydroxide as well as preparation method and application thereof in improvement of saline-alkali soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] When collecting soil, use a small soil shovel to collect 5 points of Tianjin coastal saline-alkali soil with a surface layer of 0-20cm according to the S-shaped line. After crushing and mixing, pass through a 2mm standard sieve. The basic properties of the collected air-dried soil samples are listed in Table 1.

[0029] Table 1

[0030]

[0031] The saline-alkaline soil improver magnesium aluminum hydroxide is made of MgCl 2 , AlCl 3 The molar ratio is 1:3 and ammonia water is prepared by co-precipitation, stirring, peptization, centrifugal washing and vacuum drying. Specifically include the following steps:

[0032] (1) Add chemically pure grade MgCl to ultrapure water at a molar ratio of 1:3 2 and AlCl 3 , fixed total ion solubility 0.5mol / L;

[0033] (2) Stir the mixed solution in step (1) and slowly add 3 times diluted concentrated ammonia water dropwise until no new precipitation occurs, forming a white mixed solution;

[0034] (3) Continue to slowly sti...

experiment example 1

[0041] The experimental effect of embodiment 1 is measured and analyzed.

[0042] When acidic magnesium aluminum hydroxide is used as a modifier,figure 1 It is the SEM picture of the soil under different additions of magnesium aluminum hydroxide, and the microcosmic agglomeration of the soil can be seen.

[0043] Such as figure 1 As shown, where (a), (b), (c), (d), (e), (f) SEM diagrams represent 0, 10, 25, 50, 75, 100mg / g additions respectively The SEM picture of saline-alkali soil, it can be seen from the SEM picture that the aggregates of saline-alkali soil added with magnesium aluminum hydroxide modifier are significantly larger than those of the control group, indicating that adding the modifier can promote the agglomeration of saline-alkali soil. The improvement effect of 50mg / g>25mg / g>10mg / g, and with the increase of the addition amount, the improvement effect of the addition amount of 75mg / g and 100mg / g on the reunion of saline-alkali soil is compared with that of 50m...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses acid magnesium aluminum hydroxide as well as a preparation method and application thereof in improvement of coastal saline-alkali soil. An acid magnesium aluminum hydroxide isprepared by co-precipitating MgCl2 and AlCl3 at a molar ratio of 1:3 under the condition of dropping ammonia water diluted by 3 times. In the invention, from the aspect of microcosmic double electriclayers of the soil, the adsorption capacity of the soil for base cations is reduced by utilizing the overlapping of diffusion layers between negative charge saline-alkali soil colloid and prepared positive charge magnesium aluminum hydroxide colloid, so that the saline-alkali soil is desalted and improved. According to the acid magnesium aluminum hydroxide, the coastal saline-alkali soil can be remarkably improved, the soil aggregation is promoted, the salinity in the saline-alkali soil is promoted to be separated out, the pH value of the soil is decreased, and the saline-alkali soil is improved by modifying the soil on the premise of not introducing new pollutants. According to the material, the problem of salinization of the soil can be solved, and the salinization of the soil can be effectively prevented, therefore, the material is an environment-friendly material.

Description

technical field [0001] The invention belongs to the field of soil improvement, and in particular relates to an acidic magnesium aluminum hydroxide, a preparation method thereof and an application in coastal saline-alkaline soil improvement. Background technique [0002] The problem of land salinization exists widely in the world, and it is an environmental problem caused by natural or human activities. Global land area 13.2×10 9 ha, of which arable land 7×10 9 ha, cultivated land 1.5×10 9 ha. About 0.34×10 in the cultivated land 9 ha (23%) is saline soil, 0.56×10 9 ha (37%) is alkaline earth, distributed in more than 100 countries. The total area of ​​saline soil in my country is about 3.6×10 7 ha, accounting for 4.88% of the country's usable land area, of which the coastal saline-alkali soil is about 1.3×10 6 ha. my country has a large population and little land, and the arable land resources are very tight. The per capita arable land is only 0.09ha, which is less ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/04C09K17/08C01F7/02C09K109/00
Inventor 赵林田露邓经惠孙袭明
Owner TIANJIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com