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Attapulgite loaded chitosan adsorbent, and preparation method thereof

A technology for loading chitosan and attapulgite, which is applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc. To solve the problem of low utilization rate of the group, it can inhibit the growth of microorganisms, improve the loading effect, and improve the utilization efficiency.

Inactive Publication Date: 2017-06-20
SUZHOU DINGYU BIOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, chitosan has poor water solubility, only the surface molecules of chitosan powder can chelate with heavy metal ions, and the utilization rate of active groups is not high, so a large amount of chitosan needs to be added when treating sewage, which increases the Increased sewage treatment operating costs
In addition, the swelling of chitosan in sewage also makes separation more difficult, and aluminum sulfate, polyaluminum chloride, etc. need to be added, and the final flocculation and sedimentation process is not easy to control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A preparation method of attapulgite-loaded chitosan adsorbent, comprising the following steps:

[0018] S01: Soak attapulgite in a dilute acid solution for acid treatment, then dry and roast the obtained solid at a drying temperature of 80°C and a roasting temperature of 300°C, and finally grind and sieve 300 meshes to obtain acidified attapulgite earth;

[0019] S02: Slowly dissolve chitosan with 3% acetic acid solution by volume fraction to form a chitosan solution;

[0020] S03: The acidified attapulgite and chitosan solution are mixed with the mass ratio of attapulgite and chitosan at a ratio of 20:1, then dispersed with an ultrasonic cleaner, heated and dried in a microwave oven to form solid particles, and then Grind, then sieve through 300 mesh, dry and preserve.

[0021] The dilute acid is preferably 0.01mol / L HCl.

[0022] The drying temperature is 100°C, and the calcination temperature is 350°C.

[0023] The attapulgite is commercially available.

[0024]...

Embodiment 2

[0027] A preparation method of attapulgite-loaded chitosan adsorbent, comprising the following steps:

[0028] S01: Soak attapulgite in a dilute acid solution for acid treatment, then dry and roast the obtained solid at a drying temperature of 90°C and a roasting temperature of 350°C, finally grind and sieve 300 meshes to obtain acidified attapulgite earth;

[0029] S02: Slowly dissolve chitosan with 3% acetic acid solution by volume fraction to form a chitosan solution;

[0030] S03: The acidified attapulgite and chitosan solution are mixed with the mass ratio of attapulgite and chitosan at a ratio of 35:1, then dispersed with an ultrasonic cleaner, heated and dried in a microwave oven to form solid particles, and then Grind, then sieve through 300 mesh, dry and preserve.

[0031] The dilute acid is preferably 0.01mol / L HCl.

[0032] The drying temperature is 100°C, and the calcination temperature is 350°C.

[0033] The attapulgite is commercially available.

[0034] The...

Embodiment 3

[0037] A preparation method of attapulgite-loaded chitosan adsorbent, comprising the following steps:

[0038] S01: Soak attapulgite in a dilute acid solution for acid treatment, then dry and roast the obtained solid at a drying temperature of 100°C and a roasting temperature of 400°C, finally grind and sieve 300 meshes to obtain acidified attapulgite earth;

[0039] S02: Slowly dissolve chitosan with 3% acetic acid solution by volume fraction to form a chitosan solution;

[0040] S03: The acidified attapulgite and chitosan solution are mixed with the mass ratio of attapulgite and chitosan at a ratio of 50:1, then dispersed with an ultrasonic cleaner, heated and dried in a microwave oven to form solid particles, and then Grind, then sieve through 300 mesh, dry and preserve.

[0041] The dilute acid is preferably 0.01mol / L HCl.

[0042] The drying temperature is 100°C, and the calcination temperature is 350°C.

[0043] The attapulgite is commercially available.

[0044] Th...

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PUM

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Abstract

The invention discloses an attapulgite loaded chitosan adsorbent, and a preparation method thereof. The preparation method comprises following steps: 1, attapulgite is immsersed in a diluted acid solution for acid treatment, an obtained solid substance is subjected to drying at 80 to 100 DEG C, and sintering at 300 to 400 DEG C, is grinded, and is sieved using a sieve of 300 meshes so as to obtain acidified attapulgite; 2, an acetic acid solution with a volume ratio of 3% is used for dissolving chitosan slowly so as to obtain a chitosan solution; and 3, the acidified attapulgite and the chitosan solution are mixed at an attapulgite / chitosan mass ratio of 20:1-50:1, are subjected to dispersion treatment using a ultrasonic cleaning machine, are subjected to heating drying in a microwave oven into solid particles, are grinded, are sieved using a sieve of 300 meshes, and are dried and stored. According to the preparation method, the surface of inorganic mineral is loaded with chitosan, the utilization rate of chitosan active groups is increased, sewage treatment operation cost is reduced, and separation of the attapulgite loaded chitosan adsorbent is convenient to realize.

Description

technical field [0001] The invention relates to an adsorbent, in particular to an attapulgite loaded chitosan adsorbent and a preparation method thereof, belonging to the field of sewage treatment. Background technique [0002] Chitosan molecules contain many active groups, such as amino groups and hydroxyl groups, which can chelate with heavy metal ions in sewage. It has high adsorption capacity and can be used as an adsorbent for heavy metals in sewage. However, chitosan has poor water solubility, only the surface molecules of chitosan powder can chelate with heavy metal ions, and the utilization rate of active groups is not high, so a large amount of chitosan needs to be added when treating sewage, which increases the Increased sewage treatment operating costs. In addition, the swelling of chitosan in sewage also makes separation more difficult, and aluminum sulfate, polyaluminum chloride, etc. need to be added, and the final flocculation and sedimentation process is not...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
CPCB01J20/24B01J20/12C02F1/288
Inventor 林耀朋
Owner SUZHOU DINGYU BIOLOGICAL TECH CO LTD