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Preparation method and application of magnesium-loaded acid modification expanded vermiculite composite adsorbing material

A technology of composite adsorption material and expanded vermiculite, which is applied in the direction of chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve the problems of difficult recovery and high cost, and achieve the improvement of dissolved oxygen content, efficient recovery, layer The effect of small changes in spacing

Active Publication Date: 2018-11-27
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, this method still has the problems of high cost and difficult recovery in terms of magnesium source dosing and pH regulation, which limits its industrial application.

Method used

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  • Preparation method and application of magnesium-loaded acid modification expanded vermiculite composite adsorbing material
  • Preparation method and application of magnesium-loaded acid modification expanded vermiculite composite adsorbing material
  • Preparation method and application of magnesium-loaded acid modification expanded vermiculite composite adsorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A preparation method of an acid-modified expanded vermiculite composite adsorption material loaded with magnesium, comprising the following steps:

[0043] (1) Acid-modified vermiculite:

[0044] Put 30g of expanded vermiculite passed through an 80 mesh sieve into a 1000mL beaker, add 356mL of deionized water to form an aqueous solution, and then add concentrated HNO with a mass fraction of 68%. 3 244mL, placed in a magnetic stirrer at 30-60°C for 4 hours, then allowed to stand for 5 hours; then the acid-modified vermiculite was washed with deionized water until the washing liquid was neutral, then suction filtered, and the The final expanded vermiculite is dried at 105°C to constant weight, passed through an 80-mesh sieve, and sealed for storage to obtain acid-modified expanded vermiculite;

[0045] (2) loaded magnesium peroxide:

[0046] Take 1g of the prepared acid-modified expanded vermiculite, put it in a 250mL beaker, add 7.72g of magnesium peroxide, and add 10...

Embodiment 2

[0049] A preparation method of a magnesium-loaded modified expanded vermiculite composite adsorption material, comprising the following steps:

[0050] (1) Acid-modified vermiculite:

[0051] Put 30g of expanded vermiculite through 80 mesh sieve in a 1000mL beaker, add 356mL of deionized water to form an aqueous solution, and then add 244mL of concentrated HNO with a mass fraction of 68%. 3 , placed in a magnetic stirrer at 30 to 60 degrees and stirred for 4 hours, then allowed to stand for 5 hours, then the acid-modified vermiculite was washed with deionized water until the washing liquid was neutral, and suction filtered, and the filtered The expanded vermiculite is dried at 105°C to constant weight, passed through an 80-mesh sieve, and sealed for storage to obtain acid-modified expanded vermiculite;

[0052] (2) loaded magnesium peroxide:

[0053] Take 1g of the prepared acid-modified expanded vermiculite, put it in a 250mL beaker, add 15.45g of magnesium peroxide, and ad...

Embodiment 3

[0056] A preparation method of a magnesium-loaded modified expanded vermiculite composite adsorption material, comprising the following steps:

[0057] (1) Acid-modified vermiculite:

[0058] Put 30g of expanded vermiculite through 80 mesh sieve in a 1000mL beaker, add 356mL of deionized water to form an aqueous solution, and then add 244mL of concentrated HNO with a mass fraction of 68%. 3 , placed in a magnetic stirrer at 30-60°C for 4 hours, then allowed to stand for 5 hours; then the acid-modified vermiculite was washed with deionized water until the lotion was neutral, and suction filtered. The expanded vermiculite is dried at 105°C to constant weight, passed through an 80-mesh sieve, and sealed for storage to obtain acid-modified expanded vermiculite;

[0059] (2) loaded magnesium peroxide:

[0060] Take 1g of the prepared acid-modified expanded vermiculite, put it in a 250mL beaker, add 23.17g of magnesium peroxide, and add 100mL of deionized water, then fully react i...

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Abstract

The invention discloses a preparation method and application of a magnesium-loaded acid modification expanded vermiculite composite adsorbing material. Acid modification expanded vermiculite is obtained through the acid modification of the expanded vermiculite; or after acid modification expanded vermiculite is further loaded with straw biochar, the modified vermiculite is loaded with a magnesiumsource for the pollution control of black and odorous water; the application achieves the synchronous recovery of nitrogen and phosphorus by adopting a struvite crystallization and precipitation method, improves the reaction efficiency and purifies water; the recycled product of the magnesium-loaded acid modification expanded vermiculite composite adsorbing material is controlled-release fertilizer with the excellent performances, is useful for farmland crop production; and the efficient utilization of the product is realized.

Description

technical field [0001] The invention relates to a composite adsorption material, in particular to a preparation method and application of an acid-modified expanded vermiculite composite adsorption material loaded with magnesium. Background technique [0002] With the gradual development of my country's industry, the waste water and waste gas discharged from some factories lead to rivers, which has led to the increasingly serious phenomenon of black and smelly river water in our country. The eutrophication of the water body caused by the excessive discharge of nitrogen, phosphorus and other nutrient elements not only affects the working and living environment of the surrounding residents, but also causes great harm to human health. Therefore, the research and treatment of black and odorous water body has increasingly become a focus of attention. [0003] The struvite precipitation method is considered to be an effective method for recovering phosphate and ammonia nitrogen in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/04B01J20/20B01J20/30C02F1/28C02F101/16C02F101/30
CPCB01J20/041B01J20/046B01J20/12B01J20/20B01J20/3078B01J20/3085B01J2220/4825C02F1/281C02F1/283C02F2101/105C02F2101/16C02F2101/30C02F2209/08C02F2209/14C02F2209/16
Inventor 段文松詹佳慧蒋繁欣郝敏
Owner ANHUI NORMAL UNIV
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