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Method for preparing efficient function material easy to separate and used for wastewater treatment

A functional material and wastewater treatment technology, which is applied in the field of chemical industry, achieves the effect of wide range of action, reduction of heavy metal content and COD value, and reduction of difficulty and time

Active Publication Date: 2014-11-12
ZHEJIANG ZHENGJIE ENVIRONMENTAL SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, chitosan also has shortcomings in practical applications. After the pollutants are removed by adsorption, it is difficult to effectively and quickly separate them from the water body.

Method used

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  • Method for preparing efficient function material easy to separate and used for wastewater treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A method for preparing an efficient and easy-to-separate functional material for wastewater treatment, comprising the following steps:

[0032] (1) Take 12g of cobalt nitrate and 10g of chitosan, add it to 1kg of acetic acid solution with a mass concentration of 2%, and ultrasonically treat it for 10 minutes; it can achieve the purpose of mixing evenly;

[0033] (2) Spray-dry the mixed solution obtained in step (1) to obtain yellow-brown solid particles; wherein, the spray-drying adopts the centrifugal spray-drying method, and the inlet temperature is set at 180°C to obtain yellow-brown solid particles with a particle size distribution of 5~ 20 micron interval; half decomposition of cobalt nitrate can be realized;

[0034] (3) Put the solid particles into the ceramic boat, move them into the corundum tube in the high temperature tube furnace, first seal the corundum tube and vacuumize it, and then pass in nitrogen for 30 minutes, then change the atmosphere to 100ml / min ...

Embodiment 2

[0040] A method for preparing an efficient and easy-to-separate functional material for wastewater treatment, comprising the following steps:

[0041] (1) Take 5g of cobalt nitrate and 5g of chitosan, add it to 0.5kg of acetic acid solution with a mass concentration of 4%, and ultrasonically treat it for 5 minutes; it can achieve the purpose of mixing evenly;

[0042] (2) Spray-dry the mixed solution obtained in step (1) to obtain yellow-brown solid particles; wherein, the spray-drying adopts the centrifugal spray drying method, and the inlet temperature is set at 150°C to obtain yellow-brown solid particles with a particle size distribution of 5~ 20 micron interval; half decomposition of cobalt nitrate can be realized;

[0043] (3) Put the solid particles into the ceramic boat, move them into the corundum tube in the high temperature tube furnace, first seal the corundum tube and vacuumize it, and then pass in nitrogen for 25 minutes, then change the atmosphere to 80ml / min ni...

Embodiment 3

[0047] A method for preparing an efficient and easy-to-separate functional material for wastewater treatment, comprising the following steps:

[0048] (1) Take 15g of cobalt nitrate and 10g of chitosan, add it to 2kg of acetic acid solution with a mass concentration of 2%, and ultrasonically treat it for 15 minutes; it can achieve the purpose of mixing evenly;

[0049] (2) Spray-dry the mixed solution obtained in step (1) to obtain yellow-brown solid particles; wherein, the spray-drying adopts the centrifugal spray-drying method, and the inlet temperature is set to 200°C to obtain yellow-brown solid particles with a particle size distribution of 5~ 20 micron interval; half decomposition of cobalt nitrate can be realized;

[0050] (3) Put the solid particles into the ceramic boat, move them into the corundum tube in the high temperature tube furnace, first seal the corundum tube and evacuate it, then pass in nitrogen for 40 minutes, then change the atmosphere to 120ml / min nitro...

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Abstract

The invention relates to a method for preparing an efficient function material easy to separate and used for wastewater treatment. The method includes the following steps that (1) cobalt nitrate and chitosan are obtained and added to an acetic acid solution with the mass concentration ranging from 1% to 5% and ultrasonically treated for 5 to 15 min, wherein the weight ratio of the cobalt nitrate to the chitosan to the acetic acid solution is 5 to 15:5 to 10:500 to 2000; (2) spray drying is conducted on a mixed solution obtained from the step (1), so that tawny solid particles are obtained; (3) the solid particles are calcined at the temperature between 600 DEG C and 780 DEG C, so that a carbon-cobalt composite material of a mesoporous structure is obtained; (4) the carbon-cobalt composite material is put in a carboxymethylation chitosan aqueous solution with the mass concentration ranging from 1% to 5% and the mixture is stirred, sucked, filtered and dried, so that the function material is obtained. The method has the advantages that the function material is efficient, easy to separate, economical and reusable, and heavy metal, organic matter and the like in wastewater can be comprehensively treated.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and relates to a preparation method of a functional material for wastewater treatment, in particular to a preparation method of a highly efficient and easily separable functional material for wastewater treatment which can comprehensively treat wastewater. Background technique [0002] Chitosan is one of the natural polymer materials with excellent properties. Chitin, the precursor of chitosan, widely exists in crustaceans such as shrimp and crab, and is the second largest natural polymer compound after cellulose in the world. Chitosan has hydrophilicity, biocompatibility, degradability and good affinity to biomacromolecules, and is widely used in wastewater treatment, chromatographic separation, enzyme immobilization and drug sustained release systems. Chitosan is the deacetylation product of chitin, and its molecular chain contains active hydroxyl and amino groups, which has good compl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F1/48
Inventor 项海陈赵扬任松洁徐高松
Owner ZHEJIANG ZHENGJIE ENVIRONMENTAL SCI & TECH CO LTD
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