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Treatment method for effectively improving microstructures and absorption properties of attapulgite and kieselguhr

A technology of attapulgite and microstructure, which is applied in the direction of adsorption water/sewage treatment, chemical instruments and methods, and other chemical processes, and can solve the problems of secondary pollution, cumbersome steps, and high energy consumption, so as to increase porosity and reduce Impurity content, effect of improving dispersibility

Inactive Publication Date: 2013-05-08
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods improve the dispersibility of attapulgite or the porosity of diatomite to a certain extent, they often have disadvantages such as high energy consumption, cumbersome steps, or the introduction of secondary pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A snakeskin bag containing 20 kg of attapulgite, whose overall thickness was controlled at 30 cm, was irradiated by high-energy electron beams with an energy of 10 MeV and a dose of 40 keV in sequence for 30 seconds and 50 seconds, respectively. Then, according to the mass ratio of 20%, it is added to the solid pesticide chlorpyrifos to make a wettable powder, which is a controllable loss pesticide.

Embodiment 2

[0021] A snakeskin bag containing 10 kg attapulgite, whose overall thickness is controlled at 30 cm, was irradiated with high-energy electron beams with an energy of 10 MeV and a dose of 30 keV for 30 seconds and 80 seconds, respectively. Then as an adsorbent, absorb heavy metal (chromium ion) wastewater at a concentration of 1g / L, and the concentration of chromium ion after attapulgite adsorption is 0.1g / L.

Embodiment 3

[0023] A snakeskin bag filled with 30 kg of diatomite, whose overall thickness is controlled at 30cm, was irradiated with high-energy electron beams with an energy of 15MeV and a dose of 40keV for 30 seconds and 50 seconds, respectively. Then, as a pesticide attachment aid, it is added to the liquid pesticide chlorpyrifos at a mass ratio of 10% to make a suspension, which is a controllable loss pesticide.

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Abstract

The invention discloses a treatment method for effectively improving microstructures and absorption properties of attapulgite and kieselguhr. By using high-temperature pyrolysis, sputtering and Coulomb explosion effect generated by physical irradiation, a nanorod crystal structure inside the attapulgite is effectively decomposed and dispersed, and the specific surface area of the attapulgite is increased, and thus the absorption property of the attapulgite can be remarkably improved. Meanwhile, impurities in ducts of the kieselguhr can be removed, the porosity is increased, and thus the absorption property is improved. The modified clay can be used as a pesticide adhering assistant and an efficient absorbing agent for use.

Description

technical field [0001] The invention relates to the field of modification of nanometer materials, in particular to a new method for efficiently and conveniently significantly improving the microstructure and adsorption of natural clay attapulgite and diatomite. Background technique [0002] Attapulgite clay refers to a clay mineral with attapulgite as the main component. It is a hydrated magnesium aluminum silicate with a fibrous crystal structure. As a natural nanostructure mineral material with a nanochannel structure, Attapulgite clay can be used as an adsorbent because of its large specific surface area and certain ion exchange properties, and it is widely used in the adsorption and removal of some organic dyes. Natural attapulgite rod crystal fibers are easy to get together to form many crystal bundles, which are in a pyre structure, with low dispersion and limited adsorption capacity. Therefore, in order to effectively improve the adsorption performance of attapulgi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/12B01J20/14C02F1/28
Inventor 张静吴正岩蔡冬清向育斌王敏吴丽芳
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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