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Boracic polysilicic acid containing aluminum sulfate and zinc sulfate and chitosan composite flocculant and preparation method thereof

A technology of polyaluminum zinc silicate and composite flocculant, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sewage treatment, etc., can solve the problem of reducing dissolved oxygen in water, polymetallic ions, polluted water, etc. problems, to achieve efficient and thorough flocculation and algae removal, good storage performance, and less metal ions

Inactive Publication Date: 2018-03-13
HENAN VOCATIONAL COLLEGE OF WATER CONSERVANCY ANDENVIRONMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Eutrophic water can easily lead to algae blooms, which can seriously pollute the water
The massive reproduction of algae has brought many problems: it will reduce the dissolved oxygen in the water body, resulting in the death of a large number of fish and shrimp; it is easy to increase the turbidity of the water body and emit a fishy smell; some algae will also produce biologically toxic products, causing The use of drinking water poses a great safety hazard
Boron-containing polyaluminum zinc silicate has the advantages of good coagulation effect, large flocs, and fast sedimentation, but it contains more aluminum and zinc components, and more metal ions remain in the treated water

Method used

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  • Boracic polysilicic acid containing aluminum sulfate and zinc sulfate and chitosan composite flocculant and preparation method thereof
  • Boracic polysilicic acid containing aluminum sulfate and zinc sulfate and chitosan composite flocculant and preparation method thereof
  • Boracic polysilicic acid containing aluminum sulfate and zinc sulfate and chitosan composite flocculant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The boron-containing aluminum zinc polysilicate-chitosan composite flocculant of the present invention is made of aluminum sulfate octadecahydrate, zinc sulfate heptahydrate, sodium metasilicate nonahydrate, borax and chitosan, wherein aluminum and silicon The molar ratio of zinc and silicon is 0.3-0.5, and the preferred value is 0.4; the molar ratio of zinc and silicon is 0.2-0.4, and the preferred value is 0.3; the molar ratio of boron and silicon is 0.1-0.2, and the preferred value is 0.1; chitosan and silicon The mass ratio of is 0.04-0.15, and the preferred value is 0.12.

[0035] The invention also discloses a preparation method of the boron-containing aluminum zinc polysilicate-chitosan composite flocculant, which is carried out sequentially according to the following steps:

[0036] The first step is to weigh 14.21 grams of sodium metasilicate nonahydrate (i.e. Na 2 SiO 3 •9H 2 O) In a beaker, add deionized water and configure it as a 0.5 mol / L solution, then...

Embodiment 2

[0048] The difference between this example and Example 1 is that the preparation method of the boron-containing zinc aluminum polysilicate-chitosan composite flocculant of this example includes the following steps:

[0049] The first step is to weigh 14.21 grams of sodium metasilicate nonahydrate (i.e. Na 2 SiO 3 •9H 2 O) In a beaker, add deionized water and configure it as a 0.5 mol / L solution, then stir evenly on a magnetic stirrer, adjust pH=3.5 with sulfuric acid with a concentration of 50% by volume, polymerize for 30 minutes, and the solution becomes transparent Light blue, the polysilicic acid solution was prepared.

[0050] The second step is to prepare boron polysilicate aluminum zinc flocculant solution;

[0051] Weigh 5.0 grams of aluminum sulfate octadecahydrate (ie Al 2 (SO 4 ) 3 18H 2 O), 2.88 grams of zinc sulfate heptahydrate (ie ZnSO 4 ·7H 2 0) and 0.48 g of borax (i.e. Na 2 B 4 o 7 10H 2 O) Dissolve in a beaker with deionized water, and add each ...

Embodiment 3

[0059] The difference between this example and Example 1 is that the preparation method of the boron-containing zinc aluminum polysilicate-chitosan composite flocculant of this example includes the following steps:

[0060] The first step is to weigh 14.21 grams of sodium metasilicate nonahydrate (i.e. Na 2 SiO 3 •9H 2 O) In a beaker, add deionized water and stir evenly on a magnetic stirrer, adjust the pH=3.5 with sulfuric acid with a concentration of 50% by volume, polymerize for 35 minutes, the solution is transparent and light blue, and obtain a polysilicate solution .

[0061] The second step is to prepare boron polysilicate aluminum zinc flocculant solution;

[0062] Weigh 8.33 grams of aluminum sulfate octadecahydrate (ie Al 2 (SO 4 ) 3 18H 2 O), 5.75 grams of zinc sulfate heptahydrate (ie ZnSO 4 ·7H 2 0) and 0.95 g of borax (i.e. Na 2 B 4 o 7 10H 2 O) Dissolve in a beaker with distilled water, and add each solution configured in this step to the polysilica...

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PUM

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Abstract

The invention discloses a boracic polysilicic acid containing aluminum sulfate and zinc sulfate and chitosan composite flocculant which is prepared from aluminum sulfate octadecahydrate, heptahydrate,sodium metasilicate nonahydrate, borax, chitosan and sulfuric acid by hybrid reaction. The molar ratio of aluminum to silicon is 0.3-0.5, the molar ratio of zinc to silicon is 0.2-0.4, the molar ratio of boron to silicon is 0.1-0.2, and the mass ratio of the chitosan to silicon is 0.04-0.15. The invention further discloses a preparation method of the boracic polysilicic acid containing aluminum sulfate and zinc sulfate and chitosan composite flocculant. The preparation method includes the steps: first, preparing polysilicic acid solution; second, preparing boracic polysilicic acid containingaluminum sulfate flocculant solution; third, preparing chitosan solution; fourth, preparing a boracic polysilicic acid containing aluminum sulfate and zinc sulfate and chitosan composite flocculant crude product; fifth, preparing the finished boracic polysilicic acid containing aluminum sulfate and zinc sulfate and chitosan composite flocculant. The composite flocculant prepared by the preparationmethod is low in cost, stable in performance, good in storage performance, convenient to use and more environmentally friendly as flocculation and algae removal are more efficient and thorough, and fewer metal ions remain in water.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a flocculant and a preparation method thereof, in particular to a flocculant for treating algae-containing wastewater and a preparation method thereof. Background technique [0002] With the rapid development of the economy, a lot of wastewater that has not been effectively treated contains a large amount of nutrients such as nitrogen and phosphorus, which accelerates the process of eutrophication in water bodies. Eutrophic water can easily lead to algae blooms, which can seriously pollute the water. The massive reproduction of algae has brought many problems: it will reduce the dissolved oxygen in the water body, resulting in the death of a large number of fish and shrimp; it is easy to increase the turbidity of the water body and emit a fishy smell; some algae will also produce biologically toxic products, causing The use of drinking water has brought great potential s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/56
CPCC02F1/5236C02F1/56
Inventor 武桂芝高传彬刘萍刘艳芳芈书贞
Owner HENAN VOCATIONAL COLLEGE OF WATER CONSERVANCY ANDENVIRONMENT
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