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Preparation method of magnetic bentonite for removing MC-LR (microcystic toxins)

A technology of MC-LR and bentonite, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problems of weak adsorption capacity and low magnetism of composite materials, and achieve strong enrichment capacity, Synthesize simple, magnetic effects

Inactive Publication Date: 2014-02-12
JILIN INST OF CHEM TECH
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Problems solved by technology

Since the co-precipitation technology itself is producing high-quality Fe 3 o 4 Nanoparticles have certain limitations, resulting in composites with low magnetic properties and weak adsorption capacity

Method used

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  • Preparation method of magnetic bentonite for removing MC-LR (microcystic toxins)
  • Preparation method of magnetic bentonite for removing MC-LR (microcystic toxins)
  • Preparation method of magnetic bentonite for removing MC-LR (microcystic toxins)

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preparation example Construction

[0015] The preparation embodiment of magnetic bentonite:

[0016] Weigh 0.5 g of zirconium pillared bentonite, FeCl 3 ·6H 2 O (1.35 g) was dissolved in 40 mL of ethylene glycol and stirred magnetically for 10 min, after which anhydrous sodium acetate (3.60 g) and polyethylene glycol (1.00 g) were added. The mixture was stirred for 20 min to form a yellow-brown liquid, which was transferred to a polytetrafluoroethylene-lined stainless steel reactor (50 mL) and sealed, and heated to 190 °C in an oven for 8 h. The obtained magnetic bentonite was separated by an external magnetic field, washed several times with secondary water and absolute ethanol, then vacuum-dried at 60 °C for 6 h, and ground to obtain the finished Zr-B-Fe 3 o 4 .

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Abstract

The invention belongs to the technical field of inorganic composite materials and in particular relates to a preparation method of a magnetic bentonite in order to solve the problems of poor uniformity and low magnetism of the magnetic bentonite prepared by a conventional coprecipitation method. The preparation method comprises the following steps of preparing a functionalized zirconium-pillared bentonite material (Zr-B); then dissolving the functionalized zirconium-pillared bentonite material into ethylene glycol; adding anhydrous sodium acetate and polyethylene glycol into the mixture and uniformly stirring; transferring the mixture into a hydro-thermal synthesis kettle; and heating the hydro-thermal synthesis kettle for 8 hours at certain temperature to obtain a functionalized bentonite with magnetism. The magnetic bentonite prepared by the invention has the advantages of simple synthesis, high selectivity and strong enrichment capacity and can be used for removing MC-LR (microcystic toxins) in a polluted water body.

Description

[0001] technical field [0002] The invention belongs to the field of inorganic composite materials and technology, and in particular relates to a preparation method of magnetic bentonite, which can be applied to the removal of microcystin (MC-LR) in polluted water. Background technique [0003] Magnetic nanomaterials have excellent magnetic properties, good biocompatibility, and rich chemical reaction selectivity. Specifically modified magnetic materials have a strong affinity for MC-LR. At the same time, an external magnetic field can be used to The magnetic material loaded with MC-LR is separated from the water body, which solves the problem of difficult solid-liquid separation of traditional adsorbents. Studies have shown that Fe 3 o 4 Nanoparticles have a certain ability to remove MC-LR in water, and have unique advantages in separation, but their relative price is relatively high. Therefore, how to improve the preparation method and reduce the production cost while ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/28B01J20/30C02F1/28
Inventor 连丽丽娄大伟孙大志祝波陈哲陈晓影胡凤杨巧玲
Owner JILIN INST OF CHEM TECH
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