A kind of flocculant and preparation method thereof

A flocculant, a technology of modified attapulgite, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, other chemical processes, etc., can solve the problems of limited application scope, low scum production, mutagenicity, etc. Achieve the effect of increased porosity, simple preparation method, and increased surface area

Active Publication Date: 2021-01-05
WUHU WANJIANG INTPROP OPERATION CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic flocculants are cheap, but they will have adverse effects on human health and the ecological environment; although organic polymer flocculants are used in a small amount, the scum output is small, the flocculation ability is strong, the flocs are easy to separate, and the effect of removing oil and suspended matter is good , but the residual monomers of this type of polymer have "three-caused" effects (causal, carcinogenic, and mutagenic), thus limiting its application range

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of flocculant, comprising the following steps:

[0033] 1) Attapulgite is ground through a 200-mesh sieve, 10g is taken, mixed with 0.4g sodium hexametaphosphate in 60ml 1mol / L nitric acid solution, mixed evenly, ultrasonically treated for 1.5h at room temperature, filtered, and baked at 105°C Dry and ground through a 400-mesh sieve; the attapulgite includes the following substances in terms of weight percentage: attapulgite 50%-80%, dolomite 10-30%, and quartz and feldspar impurities not greater than 10%. Place of Origin: Xuyi, Jiangsu.

[0034] 2) Place 5g of modified attapulgite prepared in step 1) in 50ml of 0.25mol / L Fe(NO 3 ) 3 In the solution, react under magnetic stirring conditions at 25°C for 10 hours, dry at 50°C for 3 hours, and grind through 200 sieves to obtain iron salt modified attapulgite;

[0035] 3) After chitosan is dissolved with 5% glacial acetic acid, 10ml of chitosan solution with mass concentration 5g / L is obtained, and 5...

Embodiment 2

[0037] A preparation method of flocculant, comprising the following steps:

[0038] 1) Attapulgite is ground through a 200-mesh sieve, 10g is taken, mixed with 0.5g sodium hexametaphosphate in 80ml 1mol / L nitric acid solution, mixed evenly, ultrasonically treated for 2 hours at room temperature, filtered, and dried at 105°C , ground through a 400-mesh sieve; the attapulgite includes the following substances in terms of weight percentage: attapulgite 50%-80%, dolomite 10-30%, and quartz and feldspar impurities not greater than 10%. Place of Origin: Xuyi, Jiangsu.

[0039] 2) Place 5g of modified attapulgite prepared in step 1) in 70ml of 0.3mol / L Fe(NO 3 ) 3 In the solution, react under the condition of magnetic stirring at 25°C for 12 hours, dry at 50°C for 3 hours, and grind through 200 sieves to obtain iron salt modified attapulgite;

[0040] 3) After chitosan is dissolved with 5% glacial acetic acid, 10ml of chitosan solution with mass concentration 5g / L is obtained, and...

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PUM

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Abstract

The invention provides a flocculant and a preparation method thereof. The preparation method comprises the steps of putting attapulgite and sodium hexametaphosphate into an acid solution, performing ultrasonic treatment, performing filtering and drying, and then performing grinding and sieving, so as to obtain modified attapulgite; putting the modified attapulgite in a solution of Fe(NO3)3, performing magnetic stirring for a reaction, and performing drying, grinding and sieving to obtain iron salt-modified attapulgite; dissolving chitosan in glacial acetic acid to obtain a chitosan solution; putting the iron salt-modified attapulgite in the chitosan solution, performing microwave treatment, and performing drying, grinding and sieving to obtain the flocculant. Compared with the prior art, the flocculant provided by the present invention is simple in preparation, has a large specific surface area, an increased porosity and a large structure volume, and is advantageous for complexing adsorption of heavy metals, reduction of COD in wastewater, adsorption of dye substances, and reduction of the tone and turbidity of printing and dyeing wastewater.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a flocculant and a preparation method thereof. Background technique [0002] According to its chemical composition, flocculants can be generally divided into two types: inorganic flocculants and organic flocculants. Inorganic flocculants include inorganic coagulants and inorganic polymer flocculants; organic flocculants include synthetic organic polymer flocculants, natural organic polymer flocculants and microbial flocculants. [0003] There are many kinds of flocculants, from low molecular weight to high molecular weight, from single type to composite type, and the general trend is to develop towards the direction of cheap, practical, non-toxic and high-efficiency. Inorganic flocculants are cheap, but they will have adverse effects on human health and the ecological environment; although organic polymer flocculants are used in a small amount, the scum output is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F1/52C02F101/20C02F101/30
CPCB01J20/24B01J20/28054C02F1/288C02F1/52C02F2101/20C02F2101/308
Inventor 不公告发明人
Owner WUHU WANJIANG INTPROP OPERATION CENT CO LTD
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