Thiol functionalized attapulgite and preparation method thereof

A technology of attapulgite and functionalization, applied in the field of thiol-functionalized attapulgite and its preparation, can solve the problems of limited adsorption capacity, decreased product performance, affected adsorption effect, etc., achieves good solvent and solubilizer, improved adsorption capacity, Good adsorption selectivity

Inactive Publication Date: 2019-08-16
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0017] Attapulgite raw ore has limited adsorption capacity for heavy metals, and the adsorption selectivity and adsorption force are not strong
The existing technology does not carry out ultrasonic control on the attapulgite, which makes the uniformity of the prepared product inconsistent, affects the adsorption ef

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  • Thiol functionalized attapulgite and preparation method thereof
  • Thiol functionalized attapulgite and preparation method thereof

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Embodiment Construction

[0053] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0054] The application principle of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0055] Such as figure 1 As shown, the preparation method of the mercapto-functionalized attapulgite provided by the embodiment of the present invention includes:

[0056] S101: Attapulgite raw soil pretreatment to remove impurities;

[0057] S102: dissolving γ-mercaptopropyltrimethoxysilane (MTS) in absolute ethanol, then adding water and PEG400 liquid to obtain a mixed solvent;

[0058] S103: putting the pretreated attapulgite into the above mixed solvent, and ultrasonically treati...

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Abstract

The invention belongs to the technical field of heavy metal passivation, discloses thiol functionalized attapulgite and a preparation method thereof. The preparation method comprises: placing pre-treated attapulgite into a mixed solvent, and ultrasonically treating by using an ultrasonic wave system to uniformly disperse the attapulgite in the mixed solvent; carrying out pretreatment impurity removal on the raw attapulgite; dissolving gamma-trimethoxysilylpropanethiol (MTS) in absolute ethanol, and adding water and PEG400 to obtain a mixed solvent; carrying out a stirring reaction for 7-8 h ina stirrer, and carrying out centrifugal separation on the sample after the reaction to remove the upper layer aqueous solution and retain the solid-state substance; and washing the solid-state substance with distilled water to achieve a neutral state, and carrying out vacuum drying for 10-12 h at a temperature of 60-80 DEG C to obtain the thiol functionalized attapulgite. According to the presentinvention, the thiol is grafted by using the silane coupling method, such that the new approach is provided for the research and development of heavy metal contaminated soil passivating agents with advantages of large adsorption capacity, environmental friendliness and good adsorption selectivity.

Description

technical field [0001] The invention belongs to the technical field of heavy metal passivation, and in particular relates to a mercapto-functionalized attapulgite and a preparation method thereof. Background technique [0002] Currently, the closest prior art: [0003] Attapulgite (also known as palygorskite) is a natural clay mineral with layer chain transition structure mainly composed of hydrous magnesium-rich silicate. Attapulgite has excellent ion adsorption performance, large specific surface area and dispersion performance, and has broad application prospects in passivation restoration of heavy metal contaminated soil. However, the attapulgite raw ore has limited adsorption capacity for heavy metals, and the adsorption selectivity and adsorption force are not strong. Therefore, it is the key to solve the problem to develop a modified attapulgite passivator with high efficiency, wide application range and low cost. [0004] Studies have shown that mercapto groups ha...

Claims

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Application Information

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IPC IPC(8): C09K17/40C09K101/00
CPCC09K17/40C09K2101/00
Inventor 胡涛蒯海伟谭立强石莹莹熊清平张孝杰张立静汪玉祥
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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