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Nano-aperture granular adsorbent and preparation and application thereof

A granular and adsorbent technology, applied in the field of nano-pore granular adsorbent, can solve the problems of secondary pollution of drinking water, easy residual solid particles, complicated preparation process, etc., achieve strong hygroscopicity, save closed equipment and electric energy, Resourceful Effects

Active Publication Date: 2014-07-02
浙江省环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: (1) powdery bentonite is prone to residual solid particles during use, which is not easy to filter, causing secondary pollution of drinking water; (2) poor adsorption effect on organic matter and heavy metals in water; (3) preparation process complex

Method used

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  • Nano-aperture granular adsorbent and preparation and application thereof
  • Nano-aperture granular adsorbent and preparation and application thereof
  • Nano-aperture granular adsorbent and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) take by weighing 3g the bentonite and chitosan mixture that ratio is 1: 1, mix homogeneously; (2) add above-mentioned mixture into the acetic acid dissolving solution of 1.2% (w / w) and dissolve into thick thing; (3) Slowly drop the above-mentioned thick matter into 50mL of alkaline solidified liquid composed of 40% (w / w) sodium hydroxide and absolute ethanol in a volume ratio of 1:5 to form spherical particles; (4) the molded The adsorbent is rinsed with distilled water to neutrality, and after drying, the finished product of nano-pore granular adsorbent is obtained.

[0027] figure 1 The finished effect of the nanoporous granular adsorbent prepared for Example 1.

[0028] figure 2 The scanning electron micrograph of the adsorbent prepared in Example 1 shows that the adsorbent has a high surface roughness (3000 times magnification) and a large pore volume, which is conducive to the adsorption of heavy metals and organic matter.

[0029] image 3 N of the adsorb...

Embodiment 2

[0031] (1) Take by weighing 3g of bentonite and chitosan mixture with a ratio of 1:3, mix uniformly; (2) add the above-mentioned mixture to 1.2% acetic acid solution and dissolve it into a thick thing; (3) mix the above-mentioned thick thing Slowly drop into 80mL of alkaline solidified solution composed of 40% sodium hydroxide and absolute ethanol in a volume ratio of 1:10 to form spherical particles; (4) rinse the formed adsorbent with distilled water until neutral, and dry After that, the finished product of the nano-pore granular adsorbent is obtained.

Embodiment 3

[0033] (1) Take by weighing 3g of bentonite and chitosan mixture with a ratio of 1:8, mix uniformly; (2) add the above-mentioned mixture to 1.2% acetic acid dissolving solution and dissolve into a thick thing; (3) mix the above-mentioned thick thing Slowly drop into 100mL of alkaline solidified solution composed of 40% sodium hydroxide and absolute ethanol in a volume ratio of 1:15 to form spherical particles; (4) Rinse the formed adsorbent with distilled water until neutral, and dry After that, the finished product of the nano-pore granular adsorbent is obtained.

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Abstract

The invention provides a nano-aperture granular adsorbent and a preparation method and application thereof. The method comprises the following steps: (1) weighting bentonite and a chitosan mixture in certain proportion, and uniformly mixing the two; (2) adding the obtained mixture into an acidic dissolved solution, then obtaining a thick object for standby after the mixture is dissolved uniformly; (3) slowly dripping the thick object into a fixative to form according to an actual demand; and (4) rinsing a formed adsorbent to a neutral adsorbent by using distilled water, and drying the neutral adsorbent so as to obtain a finished adsorbent. The nano-aperture granular adsorbent prepared by using the method disclosed by the invention overcomes the defects that powdered bentonite is poor in adsorption effect, and clay granules are uneasy to flocculate and remove and easy to cause second pollution and the like, a preparation process is simple and stable, a granular formed body is good in strength, selected materials are low in cost, and the nano-aperture granular adsorbent can efficiently adsorb pollutants such as trace heavy metals and organic polymers and the like in drinking water, thereby effectively guaranteeing the cleanness and security of the drinking water and realizing the virtuous cycle of environment-economy.

Description

(1) Technical field [0001] The invention relates to a nano-pore granular adsorbent capable of efficiently adsorbing micropollutants in drinking water, as well as its preparation and application. (2) Background technology [0002] At present, in the field of drinking water purification, the research and development of adsorption methods, especially adsorption materials, has attracted the attention of scholars at home and abroad. However, the existing adsorption materials, such as activated carbon, are difficult to meet the requirements of efficient adsorption of various pollutants, energy saving and emission reduction, and a virtuous cycle of economy and environment. In recent years, scholars at home and abroad have been looking for new adsorption materials, and tried to combine other functional materials and reagents in the adsorption materials to improve the adsorption efficiency. According to the research report (Physical and Chemical Properties of Bentonite and Its Devel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
Inventor 张杭君贾秀英叶斌晖胡赐明张密
Owner 浙江省环境科技有限公司
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