Method for preparing modified bentonite flocculating agent

A technology of bentonite and flocculant, applied in chemical instruments and methods, flocculation/precipitation water/sewage treatment, inorganic chemistry, etc., can solve problems such as difficult mass production and complicated preparation process, and achieve optimization of mineral properties and structure, preparation Simple process and high removal rate

Inactive Publication Date: 2010-04-14
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the products prepared by this process have the advantages of fast settling speed and high decolorization efficiency, the preparation process is relatively complicated, and it is not easy to produce in large quantities, so it is put into engineering practice

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A preparation method of modified bentonite flocculant, comprising the steps of:

[0016] 1) Ferrous sulfate is dissolved in distilled water and is configured into a ferrous sulfate solution (as bentonite modifier) ​​with a concentration of 0.1mol / L;

[0017] 2) Na-based bentonite is placed in an Erlenmeyer flask, added with water and stirred to form a sodium-based bentonite suspension (100 g of suspension contains 1 g of sodium-based bentonite) with a mass concentration of 1 wt%, to obtain a sodium-based bentonite suspension; The cation exchange capacity of sodium-based bentonite is (100mmol) / (100mg sodium-based bentonite) {that is, every 100mg of sodium-based bentonite contains 100mmol of cations}, and the content of montmorillonite in sodium-based bentonite is 91% (mass), and sodium-based bentonite The particle size is 60 mesh;

[0018] 3) by ferrous sulfate: the mass ratio of sodium bentonite=1:0.08, measure ferrous sulfate solution, sodium bentonite suspension;

...

Embodiment 2

[0024] A preparation method of modified bentonite flocculant, comprising the steps of:

[0025] 1) Ferrous sulfate is dissolved in distilled water and is configured into the ferrous sulfate solution (as bentonite modifier) ​​that concentration is 5mol / L;

[0026] 2) Na-based bentonite is placed in an Erlenmeyer flask, added with water and stirred to form a sodium-based bentonite suspension with a mass concentration of 10wt% (100 g of the suspension contains 10 g of sodium-based bentonite), to obtain a sodium-based bentonite suspension; The cation exchange capacity of sodium bentonite is (110mmol) / (100mg sodium bentonite) {that is, every 100mg sodium bentonite contains 110mmol cations}, the content of montmorillonite in sodium bentonite is 95% (mass), and sodium bentonite The particle size is 100 mesh;

[0027] 3) by ferrous sulfate: the mass ratio of sodium bentonite=1:80, measure ferrous sulfate solution, sodium bentonite suspension;

[0028] The ferrous sulfate solution wa...

Embodiment 3

[0033] A preparation method of modified bentonite flocculant, comprising the steps of:

[0034] 1) ferrous sulfate is dissolved in distilled water and is configured into a ferrous sulfate solution (as bentonite modifier) ​​with a concentration of 10mol / L;

[0035] 2) Na-based bentonite is placed in an Erlenmeyer flask, added with water and stirred to form a sodium-based bentonite suspension with a mass concentration of 20wt% (100g of suspension contains 20g of sodium-based bentonite), to obtain a sodium-based bentonite suspension; The cation exchange capacity of sodium bentonite is 110mmol / (100mg sodium bentonite) {that is, every 100mg sodium bentonite contains 110mmol cation}, the content of montmorillonite in sodium bentonite is 98% (mass), the particle size of sodium bentonite 200 mesh;

[0036] 3) by ferrous sulfate: the mass ratio of sodium bentonite=1: 140, measure ferrous sulfate solution, sodium bentonite suspension;

[0037] The ferrous sulfate solution was dropped ...

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PUM

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Abstract

The invention relates to a method for preparing natural mineral modified bentonite flocculating agent. A method for preparing the modified bentonite flocculating agent is characterized by comprising the following steps: firstly, preparing ferrous sulfate solution, secondly, preparing sodium bentonite suspension, thirdly, weighing ferrous sulfate solution and sodium bentonite suspension according to mass ratio between ferrous sulfate and sodium bentonite=1:0.08-1:140, dropping the ferrous sulfate solution into the sodium bentonite suspension, obtaining the solution, fourthly, filtering solution, removing filtrate, collecting solid materials in the solution, drying the solid materials under 50 to 400DEG C, disintegrating, obtaining disintegrated solid, fifthly, placing disintegrated solid into a micro-wave oven, radiating with micro wave for 0.5 to 60min under the power of 100 to 800W, and preparing the modified bentonite flocculating agent. The modified bentonite flocculating agent of the invention has high removal rate to suspended substances and total phosphorus in polluted water, and the removal rate reaches higher than 80%. The preparation technique of the invention is simple.

Description

technical field [0001] The invention relates to a preparation method of a modified bentonite flocculant. Background technique [0002] At present, the flocculants used in the market are mainly divided into inorganic flocculants, organic flocculants and composite flocculants. However, the use of inorganic or organic flocculants may cause secondary pollution and introduce new pollutants, and organic flocculants may release toxic substances. However, the use cost of composite flocculants is relatively high, which is not suitable for engineering applications. As an emerging environmental protection material, natural minerals have been studied more deeply, and their application prospects are very ideal. [0003] Existing bentonite modification process, such as patent publication number: CN 1769191A, title of invention: bentonite-based composite material for water treatment and its preparation method, which discloses a bentonite-based composite material for water treatment and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/40C02F1/52
Inventor 鲍建国潘洁靳孟贵梁杏李民敬袁悦郑丹
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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