Nanometer-ZnO-loaded expanded vermiculite adsorbing material and preparation method thereof

A technology of expanded vermiculite and adsorbent materials, which is applied in chemical instruments and methods, adsorbed water/sewage treatment, and other chemical processes, etc., can solve the problems of general adsorption capacity, poor heat resistance, volatile, etc., and achieves human safety and non-toxicity. , good heat resistance effect

Inactive Publication Date: 2016-02-17
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the single vermiculite is used as an adsorbent, its adsorption capacity is average. To obtain a better adsorption capacity, the consumption of vermiculite is relatively large, which does not conform to the rational utilization of resources

Method used

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  • Nanometer-ZnO-loaded expanded vermiculite adsorbing material and preparation method thereof

Examples

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Example Embodiment

[0030] Example 1

[0031] A preparation method of an expanded vermiculite adsorption material loaded with nanometer ZnO, comprising the following steps:

[0032] (1), zinc acetate dihydrate Zn(Ac) 2 2H 2 O, dissolved in ethanol, forms Zn(Ac) 2 2H 2 0 ethanol solution, add polyethylene glycol equimolar with zinc ion, obtain dihydrate zinc acetate mixed solution;

[0033] (2), adding expanded vermiculite to zinc acetate dihydrate mixed solution and stirring evenly, the ratio of zinc acetate dihydrate to expanded vermiculite is 20mmol / g, to obtain zinc acetate mixed solution with zinc acetate concentration of 0.4-0.8mol / L, Then add the oxalic acid ethanol solution dropwise into the zinc acetate mixed solution, adjust the pH value of the zinc acetate mixed solution to 6-10 with sodium hydroxide ethanol solution, and then place it in a constant temperature water bath at 60-90°C and stir for 0.5-4h After filtration, the gel is obtained;

[0034] (3) Wash the gel twice, heat at...

Example Embodiment

[0037] Example 2

[0038] A preparation method of an expanded vermiculite adsorption material loaded with nanometer ZnO, comprising the following steps:

[0039] (1), zinc acetate dihydrate Zn(Ac) 2 2H 2 O, dissolved in ethanol, forms Zn(Ac) 2 2H 2 0 ethanol solution, add polyethylene glycol equimolar with zinc ion, obtain dihydrate zinc acetate mixed solution;

[0040] (2), adding expanded vermiculite to zinc acetate dihydrate mixed solution and stirring evenly, the ratio of zinc acetate dihydrate to expanded vermiculite is 4mmol / g, to obtain a zinc acetate mixed solution with a zinc acetate concentration of 0.4-0.8mol / L, Then add the oxalic acid ethanol solution dropwise into the zinc acetate mixed solution, adjust the pH value of the zinc acetate mixed solution to 6-10 with sodium hydroxide ethanol solution, and then place it in a constant temperature water bath at 60-90°C and stir for 0.5-4h After filtration, the gel is obtained;

[0041] (3) After washing the gel tw...

Example Embodiment

[0044] Example 3

[0045] A preparation method of an expanded vermiculite adsorption material loaded with nanometer ZnO, comprising the following steps:

[0046] (1), zinc acetate dihydrate Zn(Ac) 2 2H 2 O, dissolved in ethanol, forms Zn(Ac) 2 2H 2 0 ethanol solution, add polyethylene glycol equimolar with zinc ion, obtain dihydrate zinc acetate mixed solution;

[0047] (2), adding the expanded vermiculite to the zinc acetate dihydrate mixed solution and stirring evenly, the ratio of zinc acetate dihydrate to the expanded vermiculite is 40mmol / g, to obtain a zinc acetate mixed solution with a zinc acetate concentration of 0.4-0.8mol / L, Then add the oxalic acid ethanol solution dropwise into the zinc acetate mixed solution, the molar ratio of oxalic acid and zinc acetate dihydrate is 1:1-1:5, adjust the pH value of the zinc acetate mixed solution to 6-10 with sodium hydroxide ethanol solution , and then placed in a constant temperature water bath at 60-90°C, stirred and re...

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Abstract

The invention discloses a nanometer-ZnO-loaded expanded vermiculite adsorbing material and a preparation method thereof. The preparation method of the nanometer-ZnO-loaded expanded vermiculite adsorbing material comprises the following steps: adding expanded vermiculite into zinc acetate dihydrate mixed solution, and evenly stirring to obtain zinc acetate mixed solution; then, dropwise adding oxalic acid ethyl alcohol solution into the zinc acetate dihydrate mixed solution, and regulating the pH (Potential Of Hydrogen) value of the zinc acetate dihydrate mixed solution to 6-10; then, stirring the obtained mixture in a constant-temperature water bath kettle at the temperature of 60-90DEG C to react for 0.5-4h, and then filtering to obtain gel; after the gel is roasted for 1.5-3h at the temperature of 450-600DEG C, cooling to the room temperature to obtain the nanometer-ZnO-loaded expanded vermiculite adsorbing material. The obtained nanometer-ZnO-loaded expanded vermiculite adsorbing material can simultaneously adsorb and process heavy metal ions, such as lead, mercury, cadmium, nickel ins and the like in a water body and kill pathogenic bacteria, such as colibacillus in the water body, the adsorption rate of the obtained nanometer-ZnO-loaded expanded vermiculite adsorbing material is 90-99%, the effective killing rate of the obtained nanometer-ZnO-loaded expanded vermiculite adsorbing material on bacteria is above 95%, and the adsorbing material has good and stable thermostability and is safe and nontoxic for a human body.

Description

technical field [0001] The invention relates to the field of heavy metal ion adsorption, in particular to an expanded vermiculite adsorption material loaded with nanometer ZnO and a preparation method thereof. Background technique [0002] The reserves of fresh water resources on the earth are limited, and the fresh water for human consumption only accounts for 0.26% of the total global water, and most of them are ground water. According to estimates from the Institute of Water Education of the United Nations Educational, Scientific and Cultural Organization (UNESCO), the number of people in the world lacking water may reach 3 billion in 2050. China is one of the countries in the world where per capita water resources are extremely scarce. [0003] However, with the discharge of the "three wastes" of heavy metal mining, smelting, and processing industries and the use of sewage irrigation, pesticides, herbicides, and chemical fertilizers, heavy metals such as lead, mercury, ...

Claims

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Application Information

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IPC IPC(8): B01J20/16B01J20/28B01J20/30C02F1/28C02F1/50C02F101/20C02F101/22
Inventor 管登高孙遥徐冠立孙传敏林金辉陈婷崔迎辉戴泽航吴彩文
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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