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Preparation method of hydrotalcite composite material for repairing soil of farmland with copper ions exceeding standard

A composite material and hydrotalcite technology, which is applied in the field of preparation of hydrotalcite composite materials, can solve problems such as difficulties in the soil remediation industry

Active Publication Date: 2015-12-23
TAICANG BIQI NEW MATERIAL RES & DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, subject to multiple barriers such as technology, capital, and business models, it is difficult for the soil remediation industry to expand in a short period of time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Wash the bagasse with tap water and dry it.

[0016] Dissolve ammonium nitrate, ammonium sulfate, urea, and calcium chloride in deionized water. The concentration of ammonium nitrate is 5g / L, the concentration of ammonium sulfate is 5g / L, the concentration of urea is 5g / L, and the concentration of calcium chloride is 5g / L. Ammonia solution was obtained.

[0017] Put 50 g of washed bagasse in 500 mL of ammoniated solution, place it at 50° C. for 10 minutes, rinse and dry to obtain ammoniated bagasse.

[0018] Dissolve sodium dodecylsulfonate and ammonium acetate in deionized water, the mass concentration of sodium dodecylsulfonate is 5%, and the mass concentration of ammonium acetate is 5%, to obtain sodium dodecylsulfonate / acetic acid ammonium mixed solution.

[0019] Put 100g of hydrotalcite in 500mL of sodium dodecylsulfonate / ammonium acetate mixed aqueous solution, stir for 1 hour, filter, dry at 100°C for 1 hour, cool, wash with deionized water, and dry to obtain ...

Embodiment 2

[0024] Wash the bagasse with tap water and dry it.

[0025] Dissolve ammonium nitrate, ammonium sulfate, urea, and calcium chloride in deionized water. The concentration of ammonium nitrate is 10g / L, the concentration of ammonium sulfate is 10g / L, the concentration of urea is 10g / L, and the concentration of calcium chloride is 10g / L. Ammonia solution was obtained.

[0026] Put 5 g of washed bagasse in 50 mL of ammoniated solution, place it at 50° C. for 10 minutes, rinse and dry to obtain ammoniated bagasse.

[0027] Dissolve sodium dodecylsulfonate and ammonium acetate in deionized water, the mass concentration of sodium dodecylsulfonate is 10%, and the mass concentration of ammonium acetate is 10%, to obtain sodium dodecylsulfonate / acetic acid ammonium mixed solution.

[0028] Put 10g of hydrotalcite in 100mL sodium dodecylsulfonate / ammonium acetate mixed aqueous solution, stir for 1 hour, filter, dry at 100°C for 1 hour, cool, wash with deionized water, and dry to obtain ...

Embodiment 3

[0033] Wash the bagasse with tap water and dry it.

[0034] Dissolve ammonium nitrate, ammonium sulfate, urea, and calcium chloride in deionized water. The concentration of ammonium nitrate is 6g / L, the concentration of ammonium sulfate is 7g / L, the concentration of urea is 8g / L, and the concentration of calcium chloride is 9g / L. Ammonia solution was obtained.

[0035] Put 50 g of washed bagasse in 500 mL of ammoniated solution, place it at 50° C. for 10 minutes, rinse and dry to obtain ammoniated bagasse.

[0036] Dissolve sodium dodecylsulfonate and ammonium acetate in deionized water, the mass concentration of sodium dodecylsulfonate is 6%, and the mass concentration of ammonium acetate is 9%, to obtain sodium dodecylsulfonate / acetic acid ammonium mixed solution.

[0037]Put 100g hydrotalcite in 800mL sodium dodecylsulfonate / ammonium acetate mixed aqueous solution, stir for 1 hour, filter, dry at 100°C for 1 hour, cool, wash with deionized water, and dry to obtain modifie...

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Abstract

The invention belongs to the field of soil repairing materials and relates to a preparation method of a hydrotalcite composite material for repairing soil of farmland with copper ions exceeding the standard. According to the preparation method, modified hydrotalcite is composited into holes of ammoniated bagasse, and the preparation method comprises specific processes such as cleaning of bagasse, ammoniation of the bagasse, modification of hydrotalcite, preparation of the composite material and the like. The bagasse and hydrotalcite composite material prepared with the method has the advantages as follows: (1) the hydrotalcite is fixed in the bagasse by the aid of ethyl cyanoacrylate, the characteristics of low density and large specific surface area of the bagasse can be realized, and the advantage that the modified hydrotalcite has high adsorption capacity for the heavy metal copper ions can also be utilized; (2) compared with hydrotalcite powder, the composite material solves problems of agglomeration of the hydrotalcite powder and reduction of adsorption capacity for the copper ions and can also solve the problem of secondary soil pollution due to the fact that the hydrotalcite adsorbing the copper ions is difficult to recover; (3) compared with the bagasse, the composite material has the advantage that the copper ion saturated adsorption amount of the soil repairing material is substantially increased.

Description

technical field [0001] The invention belongs to the technical field of soil restoration materials, and in particular relates to a method for preparing a hydrotalcite composite material for repairing farmland soil with excessive copper ions. Background technique [0002] Soil remediation is a technical measure to restore the normal function of polluted soil. In the soil remediation industry, there are more than one hundred existing soil remediation technologies, and there are more than ten commonly used technologies, which can be roughly divided into three methods: physical, chemical and biological. Since the 1980s, many countries in the world, especially developed countries, have formulated and carried out plans for the treatment and restoration of contaminated soil, thus forming a new soil restoration industry. "High pollution exceeding the standard rate", "trillion-level market", "complex system engineering", "emerging industries in the early stages of development", Chi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30B09C1/00C09K17/40C09K101/00
Inventor 蓝碧健
Owner TAICANG BIQI NEW MATERIAL RES & DEV
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