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Preparation of a magnetic chitosan carbon sphere and its application in adsorption and removal of cr(ⅵ) in water

A technology for removing water from chitosan, which is applied in the preparation of magnetic chitosan carbon spheres and the removal of Cr from water by magnetic chitosan carbon spheres. The effect of simple process, easy operation and strong physical and chemical stability

Active Publication Date: 2019-02-26
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of these cross-linking modifications is quite complicated and requires a large amount of organic solvents, which is prone to secondary pollution and sometimes leads to a decline in adsorption performance.
In addition, in the above-mentioned patents, it is difficult for solid-liquid separation after adsorption of some adsorbents

Method used

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  • Preparation of a magnetic chitosan carbon sphere and its application in adsorption and removal of cr(ⅵ) in water
  • Preparation of a magnetic chitosan carbon sphere and its application in adsorption and removal of cr(ⅵ) in water
  • Preparation of a magnetic chitosan carbon sphere and its application in adsorption and removal of cr(ⅵ) in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1. Preparation of magnetic cobalt ferrite

[0041] (1) Weigh 2.71g FeCl respectively 3 ·6H 2 O and 1.19 g CoCl 2 ·6H 2 O was dissolved in 50 mL of distilled water;

[0042](2) under magnetic stirring, in the solution obtained by step (1), add dropwise 2mol / L sodium hydroxide solution to pH greater than 11, transfer the solution to a 100mL hydrothermal reaction kettle (filling degree≤75%), Place in a high-temperature furnace for 180°C hydrothermal reaction for 24 hours;

[0043] (3) After natural cooling, the solid-liquid obtained in step (2) is magnetically separated, and the obtained solid is repeatedly washed with 0.1mol / L HCl and distilled water until neutral, dried at 60°C, ground and sieved to obtain magnetic cobalt ferrite .

[0044] 2. Preparation of magnetic chitosan carbon spheres

[0045] (1) Weigh chitosan and cobalt ferrite according to the mass ratio of chitosan and magnetic cobalt ferrite being 1:1, add 50mL of distilled water and ultrasonically dis...

Embodiment 2

[0049] 1. Preparation of magnetic cobalt ferrite

[0050] With embodiment 1.

[0051] 2. Preparation of magnetic chitosan carbon spheres

[0052] With embodiment 1, the difference is that the mass ratio of adding chitosan and magnetic cobalt ferrite is 2:1.

Embodiment 3

[0054] 1. Preparation of magnetic cobalt ferrite

[0055] With embodiment 1.

[0056] 2. Preparation of magnetic chitosan carbon spheres

[0057] With embodiment 1, difference is to add chitosan and magnetic cobalt ferrite mass ratio is 3:1.

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Abstract

The invention relates to oral powder in traditional Chinese medicine compatibility, in particular to allergy decocting powder used for treating skin allergy by utilizing pure traditional Chinese medicine and a preparation method. The allergy decocting powder is characterized by being prepared from the following traditional Chinese medicine raw materials in parts by weight: 10 to 20 parts of radix bupleuri, 15 to 35 parts of fructus mume, 15 to 20 parts of radix paeoniae alba, 20 to 35 parts of radix saposhnikoviae, 10 to 15 parts of liquorice root, 15 to 25 parts of bombyx batryticatus, 10 to 15 parts of dried radix rehmanniae, 5 to 10 parts of fructus schisandrae and 5 to 15 parts of exocarpium zingiberis recentis. The allergy decocting powder disclosed by the invention has the characteristic that reasonable compatibility of medicine is guided by traditional Chinese medicine theories of treating based on syndrome differentiation, treating diseases from the root and harmonizing nutrient and defense; the allergy decocting powder has the advantages that used traditional Chinese medicine materials all accord with regulations of Pharmacopoeia of the People's Republic of China, and raw materials of the traditional Chinese medicine are safe and reliable.

Description

technical field [0001] The invention belongs to the technical field of water pollution control, and specifically relates to a preparation method of magnetic chitosan carbon spheres, and also relates to a method for removing Cr(VI) in water by using the magnetic chitosan carbon spheres prepared above. Background technique [0002] Heavy metal chromium is one of the priority pollutants to be controlled in my country. It mainly comes from the three wastes discharged from electroplating, metallurgy, tanning, printing and dyeing and chemical industries. Chromium exists mainly in the form of Cr(III) and Cr(VI) in water. Compared with Cr(Ⅲ), Cr(Ⅵ) is more toxic, and when absorbed by the human body, it can cause stomach pain, bad habits, diarrhea, vomiting, liver cancer and other diseases. [0003] At present, the treatment methods of chromium-containing wastewater mainly include chemical precipitation method, ion exchange method, membrane separation method, photocatalytic method, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F1/62
CPCB01J20/0229B01J20/20B01J20/24B01J20/28009B01J20/28019C02F1/28C02F1/281C02F1/286
Inventor 王诗生刘齐齐戴波盛广宏练建军吴鉴衡于冬冬
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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