Photomagnetic composite flocculant and preparation method thereof

A composite flocculant and flocculant technology, which is applied in the direction of flocculation/sedimentation water/sewage treatment, magnetic field/electric field water/sewage treatment, energy wastewater treatment, etc. Does not have photocatalytic performance and other problems, achieves high flocculation activity and photocatalytic performance, simple production conditions and low cost

Inactive Publication Date: 2013-08-14
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many composite flocculants involved at present, such as a composite flocculant and its preparation method applied by Sichuan Agricultural University (publication number is CN101717144A), this method is only a flocculant with flocculation performance, does not have photocatalytic performance and It cannot be recycled and reused; there are also some inventions that can be

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Preparation of Photomagnetic Composite Flocculants

[0018] (1) Preparation of magnetic fluid composite flocculant: first, Fe 2+ and Fe 3+ Dissolve in water, stir in a water bath at 50°C for 30 minutes, then add excess NaOH solution to make the pH 11, keep it for 30 minutes, add excess tetraethyl orthosilicate, raise the temperature to 80°C, keep it for 1 hour, cool to room temperature to obtain a magnetic fluid ; Add 0.5 mg / L PAM and magnetic fluid to 100 mL of 0.5 mol / L PAC solution at the same time, stir in a water bath at 30°C for 30 minutes, ultrasonically disperse, mix for 30 minutes, and stand for 24 hours to obtain a magnetic fluid composite flocculant;

[0019] (2) Modified TiO 2 Preparation: to TiO 2 Add 1% titanate, then add acetone, wherein the ratio of titanate to acetone is 1:1.1, put this mixture into an ultrasonic cleaner, ultrasonic for 30min, and then put it in a 60℃ oven for 1h, TiO was obtained by grinding after drying 2 Powder;

[0020] (3) Pr...

Embodiment 2

[0022] Preparation of Photomagnetic Composite Flocculants

[0023] (1) Preparation of magnetic fluid composite flocculant: first, Fe 2+ and Fe 3+ Dissolve in water, stir in a water bath at 50°C for 30 minutes, then add excess NaOH solution to make the pH 11, keep it for 30 minutes, add excess tetraethyl orthosilicate, raise the temperature to 80°C, keep it for 1 hour, cool to room temperature to obtain a magnetic fluid ; Add 0.5 mg / L PAM and magnetic fluid to 100 mL of 0.5 mol / L PAC solution at the same time, stir in a water bath at 30°C for 30 minutes, ultrasonically disperse, mix for 30 minutes, and stand for 24 hours to obtain a magnetic fluid composite flocculant;

[0024] (2) Modified TiO 2 Preparation: To TiO 2 Add 2% titanate, and then add acetone, wherein the ratio of titanate and acetone is 1:1.1, put this mixture into an ultrasonic cleaner, ultrasonically for 30min, and then put it in a 60℃ oven for 1h, TiO was obtained by grinding after drying 2 Powder;

[002...

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PUM

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Abstract

The invention discloses a photomagnetic composite flocculant and a preparation method thereof. The preparation method comprises the following steps: compounding a magnetic fluid (SiO2/Fe3O4) and cationic polyacrylamide (PAM) in a polyaluminum chloride (PAC) solution to prepare a magnetic fluid composite flocculant; and combining with modified TiO2 powder to obtain the cationic PAM-TiO2/SiO2/Fe3O4 photomagnetic composite flocculant, wherein the cationic PAM:TiO2:SiO2:Fe3O4 mol ratio is (3-5):(4-6):(2-3):1. The preparation method disclosed by the invention has the advantages of simple production conditions and low cost; and the prepared photomagnetic composite flocculant has the advantages of low consumption, favorable decolorization and decontamination effects, no environmental pollution, and no toxic or harmless effect on the human body, is easy to recover and reutilize, and is suitable for sewage treatment of dyeing wastewater, oily wastewater, cultivation wastewater and the like.

Description

technical field [0001] The invention belongs to the field of sewage treatment, in particular to a photomagnetic composite flocculant and a preparation method thereof. Background technique [0002] The flocculation-sedimentation method is one of the most widely used, most economical, and most important methods in sewage treatment. It has the advantages of wide applicable pH range, high removal rate of turbidity, COD, and fast sedimentation speed. Semiconductor Photocatalyst TiO 2 As an important inorganic functional material, it has the characteristics of high photocatalytic activity, good thermal stability, good decolorization effect, no secondary pollution, safety and non-toxicity, and has been widely used in the field of wastewater treatment by photocatalytic oxidation. TiO 2 Photocatalytic oxidation can photocatalytically degrade organic harmful components that cannot be completely removed by flocculation and sedimentation into carbon dioxide and water. [0003] Theref...

Claims

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Application Information

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IPC IPC(8): C02F1/48C02F1/52
CPCY02W10/37
Inventor 解清杰蒋志辉吴春笃郑坤
Owner JIANGSU UNIV
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